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Riverside Updates Drilling and Exploration Progress on Multiple Projects

December 20, 2011 – Vancouver, BC: Riverside Resources Inc. ("Riverside" or the "Company") (TSX-V: RRI) is pleased to provide an exploration update on partner funded drilling and exploration. The Company delivered strong deal flow in 2011 signing five different option agreements with other junior partners. Riverside and its partners were busy completing four separate drill programs during the second half of the year and are currently drilling a fifth project. The Company continues to generate and advance quality exploration prospects and will aim to deliver multiple partner funded drill programs in 2012. Recently completed drill programs along with exploration updates are summarized below.

Penoles Gold-Silver Project: Riverside and partner Sierra Madre Developments took a significant step in 2011 towards delineating a resource at the El Capitan gold target. Highlighted intercepts within this shallow, open-pittable gold zone included 33.50 metres of 1.7 g/t gold (CDDH-11-17) and 33.85 metres of 1.4 g/t gold (CDDH-11-18) (News release October 24, 2011). These assays expand the drill intercepts in the Capitan zone at this project and are supportive for further drilling to prove up and expand a potential mineralized body. Favorable trench results on the property at the nearby historic mine area and silver vein system of Jesus Maria prompted Sierra Madre to test the high-grade surface numbers at depth with an initial single drill hole. That drill hole encountered the highest individual silver value in this current program (1,757.7 g/t silver from a 0.2 meter wide interval) as well as intersecting three, mineralized intervals with high-grade silver.(Full details available in November 16, 2011 News Release). Follow up drilling is expected at both the El Capitan and Jesus Maria targets in 2012. Complete assay results available Here.

Sugarloaf Peak Gold Project: Riverside’s partner Choice Gold completed six diamond drill holes totaling 2,012 metres to test target areas identified beyond the historically known mineralized zone. The lateral extension of the higher-grade mineralization intersected in SGL-11-04 (1.76 g/t gold over 9.91 meters reported by Riverside on October 6, 2011) has validated a new near-surface oxide zone for further follow up. A recently completed mapping campaign was completed with 130 grab samples collected over several parts of the property surrounding the central area of historically known mineralization. Twenty-nine samples returned values higher than 100 ppb gold, and five samples exceeded 1 g/t gold highlighted by an 11.9 g/t gold sample collected from a silicified outcrop of blue schist in the southeast part of the property. The program also returned copper results as high as 4.71% and 6.72% with associated silver values of 95.7 g/t and 63 g/t respectively (reported by Choice Gold on November 17, 2011). The drill results from phase 1A and the recent mapping campaign will guide and influence follow up drilling expected in 2012. Complete drill results from phase 1A available at theRiverside website.

Mexico Team Jan 2011.1

Libertad Gold-Silver Project: Riverside’s partner, Geologix Exploration Inc., recently completed a 1,200 m follow-up drill program. The program included 5 holes within a previously untested central portion of the project’s gold and silver mineralized structure. Results included intervals of 24.8 metres of 49.2 g/t silver and 12 metres of 0.35 g/t gold within different zones of the same drill hole (LIB-11-002) (reported by Geologix on December 9, 2011). Geologix has elected not to continue making the cash payments required to complete earn-in on the project, and thus Riverside has regained 100% ownership. Riverside is now in possession of all completed property data, which will be used to evaluate remaining target areas and determine the focus for follow up work on the project. A complete table of results for the recently completed 1,200 m drill program can be found at www.rivres.com.

Chapalota Gold-Copper Project: Riverside and partner, Guerrero Exploration Inc., completed a 2,000 m drill program during the summer of 2011. Gold and silver mineralization wasintersected at and along strike of both the Leonas and Habas zones highlighted by drill hole CH-11-07, which returned 3 m of 11.6 g/t gold including 0.3 m of 101.5 g/t Au. Follow up drill testing to test the continuity of mineralization and refining untested drill target areas are potential next steps at Chapalota. A table highlighting drill results and diagrams showing drill hole locations are available on the Company’s website.

Chapalota1

Anticipated Partner-funded Drilling and Exploration in 2012: Riverside expects its junior and major partners to fund a combined estimate of $7M towards drilling and exploration on the Company’s projects over the next 12 months. Drilling is currently underway at the Catrina Gold Project, and the Company anticipates drilling to also commence at its Pedernal, Penoles, Sugarloaf Peak and Cerro Azul projects during 2012. A more comprehensive look towards the coming year will be outlined when the Company announces its 2012 Corporate Growth Plans in early January.

New Vice President of Exploration:

Howard Davies has been promoted to Vice President of Exploration for the Company. Mr. Davies previously held the position of Exploration Manager for Riverside where he managed various exploration initiatives throughout North America. Howard Davies brings to Riverside a strong 15 year history in international project exploration and development, with a focus on gold, base metals, diamonds and tantalum. He has managed exploration projects for several junior mining companies, in the Arctic, Asia, Middle East and Africa, in addition to major companies such as Teck Cominco and, more recently, Anglogold Ashanti. Mr. Davies is a Qualified Person under National Instrument 43-101, as well as a member of AIG.

Qualified Person:

The scientific and technical data contained in this news release were prepared under the supervision of Mark J Pryor, Pri.Sci.Nat., an independent qualified person to Riverside Resources, who is responsible for ensuring that the geologic information provided in this news release is accurate and acts as a "qualified person" under National Instrument 43-101 Standards of Disclosure for Mineral Projects.

ON BEHALF OF RIVERSIDE RESOURCES INC.

"John-Mark Staude"

Dr. John-Mark Staude, President & CEO

For additional information contact:

Joness Lang

Manager, Corporate Development
Riverside Resources Inc.
Phone: (778) 327-6671
Fax: (778) 327-6675
Web: www.rivres.com

Kaley Reid

Corporate Communications
Riverside Resources Inc.
Phone: (778) 327-6671
Fax: (778) 327-6675
Web: www.rivres.com

Certain statements in this press release may be considered forward-looking information. These statements can be identified by the use of forward looking terminology (e.g., "expect”,” estimates", "intends", "anticipates", "believes", "plans"). Such information involves known and unknown risks -- including the availability of funds, the results of financing and exploration activities, the interpretation of exploration results and other geological data, or unanticipated costs and expenses and other risks identified by Riverside in its public securities filings that may cause actual events to differ materially from current expectations. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this press release.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Riverside Resources and Partner Mexigold Corp. Begin 2,000 meter Drill Program at the Catrina Gold Project in Durango, Mexico

November 22, 2011 – Vancouver, BC: Riverside Resources Inc. ("Riverside" or the "Company") (TSX-V: RRI) is pleased to report that drilling has commenced at the Catrina Gold Project in Durango, Mexico. Riverside and partner Mexigold Corp (TSX-V: MAU) recently completed trenching at Catrina (Mexigold Press Release, November 9, 2011), the results of which were interpreted as showing two previously identified key targets (Catrina and La Dura) as being connected as one large open pit style gold-silver target. The connected Catrina-La Dura target is a northeast trending target covering a 1400 meter long by 500 meter wide area, and will be one of the focuses of the current drill testing.

The drill program will test the coincident geology, geochemistry and geophysical anomalies identified at the Catrina-La Dura and Patos target areas. This drill program will consist of eight angled core holes for a total of 2,000 metres, and will test three of the existing six targets on the property.

“Riverside and Mexigold are now testing another gold-silver property in Riverside’s portfolio of over 14 projects in Mexico. This drill program is aimed at Penasquito style breccia mineralization and Camino Rojo style disseminated gold in siltstones. The Patos area with the fault structures and apparent feeder zone could host a newly identified gold district,” stated John-Mark Staude, President and CEO of Riverside Resources Inc.

For more information on the Catrina Gold Project please visit the Riverside website at www.rivres.com.

Qualified Person:

The scientific and technical data contained in this news release were prepared under the supervision of Mark J. Pryor, Pr.Sci.Nat, an independent qualified person to Riverside Resources, who is responsible for ensuring that the geologic information provided in this news release is accurate and acts as a "qualified person" under National Instrument 43-101 Standards of Disclosure for Mineral Projects.

About Riverside Resources Inc.:

Riverside’s model of growth through partnerships and exploration looks to use the prospect generation business approach to own resources, while partners share in de-risking projects on route to discovery. Additional property information on the Company’s projects can be found on the Riverside Resources Inc. website at www.rivres.com.

ON BEHALF OF RIVERSIDE RESOURCES INC.

"John-Mark Staude"

Dr. John-Mark Staude, President & CEO

For additional information contact:

Joness Lang

Manager, Corporate Development
Riverside Resources Inc.
Phone: (778) 327-6671
Fax: (778) 327-6675
Web: www.rivres.com

Kaley Reid

Corporate Communications
Riverside Resources Inc.
Phone: (778) 327-6671
Fax: (778) 327-6675
Web: www.rivres.com

Certain statements in this press release may be considered forward-looking information. These statements can be identified by the use of forward looking terminology (e.g., "expect”,” estimates", "intends", "anticipates", "believes", "plans"). Such information involves known and unknown risks -- including the availability of funds, the results of financing and exploration activities, the interpretation of exploration results and other geological data, or unanticipated costs and expenses and other risks identified by Riverside in its public securities filings that may cause actual events to differ materially from current expectations. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this press release.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Riverside and Partner Sierra Madre Developments Report Drill Results Including 33 metres of 1.7 g/t Gold at the Penoles Project in Durango, Mexico

October 24, 2011 – Vancouver, BC: Riverside Resources Inc. ("Riverside" or the "Company") (TSX-V: RRI) and its partner, Sierra Madre Developments (TSX-V: SMG), are pleased to announce positive drill results including 33.50 metres of 1.7 g/t gold (CDDH-11-17) and 33.85 metres of 1.4 g/t gold (CDDH-11-18) which are some of the best drill results ever reported from the Penoles Project in Durango, Mexico. The grade and thickness of mineralization encountered at the El Capitan target in the central and northwestern part of the “Main Zone” showed considerable improvement over previously reported drilling results. Several of the drill holes encountered near surface mineralized intervals with potentially economic grades in excess of 70 meters in thickness.

A total of 2,220 meters of HQ core drilling was completed in 18 drill holes. Several of the drill holes encountered mineralized intervals with potentially economic grades in excess of 70 meters in thickness. The results of this recent program have advanced the Project another step closer towards delineating a potential resource and the recently announced metallurgy was also favorable with greater than 60% leachable gold results (Sierra Madre News Release, October 12, 2011).

The El Capitan Target is considered an advanced, bulk tonnage oxide gold prospect. Previous widely spaced drilling at El Capitan (3 holes completed by Aurcana in 2004 and 5 holes completed by Riverside in 2008) intersected a 30 to 70 meter wide zone of low grade, oxide gold mineralization that appears to be traceable laterally for more than a kilometer along a shallow, south dipping volcanic – sedimentary contact. Preliminary geological work by Riverside indicated potential for a bulk tonnage, low grade deposit and this recent drill program has validated the conceptual model. A total of 22 drill holes (fifteen drill holes in 2011 and seven historic drill holes) have now been completed within the Main Zone. This zone has been traced by drilling over a strike length of approximately 700 meters and appears to be open for expansion down dip and along strike to the west of the area that has been drill tested.

Based on the assay results from the 2011 drill holes and the reported results from the 2004 and 2008 drill programs, the El Capitan target warrants expanded drill testing. The tables below list all 2011 and historic drill results for the Main Zone.

Table 1: Main Zone 2011 Drill Hole Summary

Drill hole 

From (m) 

To (m) 

Interval (m) 

Au g/t 

CDDH-11-01 

90.35

122.50

32.15

0.478

includes

105.20

108.90

3.70

1.036

CDDH-11-02 

45.45

96.20

50.75

0.509

includes

62.60

77.00

14.40

1.084

includes

71.00

75.60

4.60

2.411

CDDH-11-04 

Abandoned, Poor Ground Conditions

CDDH-11-03 

35.35

126.00

90.65

0.603

includes

78.75

116.25

37.50

1.030

includes

91.50

97.90

6.40

1.902

 

 

 

CDDH-11-05 

2.30

68.80

66.50

0.203

includes

14.80

31.75

16.95

0.448

 

 

 

CDDH-11-06 

28.35

79.85

51.50

0.141

CDDH-11-06 

110.75

155.50

44.75

0.182


Drill hole

 

From (m) 

To (m) 

Interval (m) 

Au g/t 

CDDH-11-07 

57.20

165.55

108.35

0.410

includes

57.20

71.15

13.95

0.619

includes

90.65

103.70

13.05

0.788

CDDH-11-11 

Abandoned, Poor Ground Conditions

CDDH-11-12 

13.28

74.2

60.92

0.154

CDDH-11-12 

170.15

194.4

24.25

0.236

CDDH-11-13 

63.15

92.05

28.90

0.469

includes

64.85

85.70

20.85

0.502

includes

64.85

68.10

3.25

0.918

CDDH-11-14 

77.70

114.80

37.10

0.694

includes

90.35

103.00

12.65

1.389

includes

94.55

99.60

5.05

2.088

CDDH-11-15 

46.55

74.15

27.60

0.202

CDDH-11-15 

91.80

131.15

39.35

0.217

CDDH-11-16 

42.70

104.00

61.30

0.680

includes

61.70

76.10

14.40

1.521

includes

69.60

74.00

4.40

2.429

CDDH-11-17 

43.40

131.80

88.40

0.816

includes

80.50

114.00

33.50

1.687

includes

95.95

104.00

8.05

2.405

includes

99.85

104.00

4.15

3.098

CDDH-11-18 

64.05

97.90

33.85

1.399

includes

82.35

97.90

15.55

2.096

Table 2: Main Zone Historic 2008 Drill Hole Summary (Riverside)

Drill hole 

From (m) 

To (m) 

Interval (m) 

Au g/t 

CDDH-08-01 

33.75

35.20

1.45

2.510

CDDH-08-01 

47.00

76.18

29.18

0.530

includes

61.90

71.70

9.80

1.067

 

 

 

CDDH-08-02 

89.94

122.25

32.31

0.659

includes

102.25

105.30

3.05

1.844

includes

102.25

111.80

9.55

1.114

 

 

 

CDDH-08-03

31.05

35.05

4.00

0.860

CDDH-08-03

74.60

78.90

4.30

0.724

CDDH-08-03

84.80

111.00

26.20

0.275

CDDH-08-03

183.05

190.30

7.25

0.443

 

Drill hole 

From (m) 

To (m) 

Interval (m) 

Au g/t 

CDDH-08-04

182.65

189.50

6.85

0.265

includes

184.10

188.30

4.20

0.343

 

 

 

CDDH-08-05

71.13

72.65

1.52

0.992

176.50

217.00

40.50

0.215

includes

180.25

188.00

7.75

0.358

Note: Gold grade was originally reported by Riverside in ppb (parts per billion). The grade in g/t was calculated by dividing the reported grade in ppb by a factor of 1000.  Widths quoted are drilled width. Calculation of true widths are pending.

Table 3: Main Zone Historic 2004 Drill Hole Summary (Aurcana)

Drill hole 

From (m) 

To (m) 

Interval (m) 

Au g/t 

PE04-01 

31.85

93.27

61.42

0.813

includes

76.20

80.77

4.57

6.400

PE04-02 

125.0

190.50

65.5

0.172

PE04-04 

78.0

147.52

69.52

0.309

Drill Program and Property Details:

The objective of the 2011 drill program was to validate the conceptual deposit model, increase the density of pierce points within the Main Zone and test for potential strike extensions of the Main Zone. The recently completed drilling program included 15 additional holes drilled from 9 separate stations within the Main Zone. Two drill holes, CDDH 11-04 and CDDH 11-11, encountered poor ground conditions and were stopped before reaching the target zone. Drill stations were spaced at 50 to 100 meters and most of the holes were drilled at an inclination of 50 degrees along an azimuth of 30 degrees (parallel to the Riverside and Aurcana holes). Two of the 2011 drill stations were historic drill sites and three of the 2011 drill holes were vertical holes. Please visit www.rivres.com to view a drill hole location map along with more information on the property.

The Penoles Project is located 70 kilometers to the south of Argonaut’s Castillo Mine, which is currently producing over 50,000 ounces a year. In addition to El Capitan, the Penoles Project hosts two historic silver mines that were operated in the late 1800’s and a highly prospective 35,000 hectare land package. There is very little technical data available regarding the mines but it appears they have never been drill tested. Concurrent with the drilling program at El Capitan, extensive backhoe trenching was carried out at one of the historic mines (Jesus Maria) to assess the thickness and grades encountered in the historic mining operations. On completion of the drilling program at El Capitan a single drill hole was completed to test if mineralization continues at depth below the historic mine workings. Results of the trenching and drilling will be announced as they become available.

Assaying and Qualified Person:

According to Sierra Madre, all drill core was placed in numbered boxes and transported to Sierra Madre’s secure core facilities by the drill contractor. Following detailed core logging all core was split using a diamond bladed core saw under the direct supervision of Sierra Madre’s Geologic staff. Half of the core was kept on site in the original core boxes, the second half was placed in labeled and sealed sample bags which were transported directly to the custody of Inspectorate, a laboratory certified for the provision of assays and geochemical analysis (ISO:9001-2008). Samples were transported to Inspectorate’s facilities in Durango, Mexico for prep work and analyzed at their facilities in Reno, Nevada. All samples were prepared using standard industry prep methods followed by fire assay analysis and aqua regia digest for trace elements. All samples with greater than 10 g/t Au were additionally tested by fire assay with a gravimetric finish. Sierra Madre has included industry certified Au standards and blanks within the sample stream in addition to field duplicates as part of the QA/QC program.

The scientific and technical data contained in this news release were prepared under the supervision of Mark J. Pryor, Pr.Sci.Nat, an independent qualified person to Riverside Resources, who is responsible for ensuring that the geologic information provided in this news release is accurate and acts as a "qualified person" under National Instrument 43-101 Standards of Disclosure for Mineral Projects.

About Riverside Resources:

Riverside is a well-funded prospect generation team of focused, proactive gold discoverers with the breadth of knowledge to dig much deeper. The Company currently has approximately $10,000,000 in the treasury and fewer than 35,000,000 shares issued. The Company’s model of growth through partnerships and exploration looks to use the prospect generation business approach to own resources, while partners share in de-risking projects on route to discovery. Additional property information on the Company’s projects can be found on the Riverside Resources Inc. website at www.rivres.com.

ON BEHALF OF RIVERSIDE RESOURCES INC.

"John-Mark Staude"

Dr. John-Mark Staude, President & CEO

For additional information contact:

Joness Lang

Manager, Corporate Development
Riverside Resources Inc.
Phone: (778) 327-6671
Fax: (778) 327-6675
Web: www.rivres.com

Kaley Reid

Corporate Communications
Riverside Resources Inc.
Phone: (778) 327-6671
Fax: (778) 327-6675
Web: www.rivres.com

Certain statements in this press release may be considered forward-looking information. These statements can be identified by the use of forward looking terminology (e.g., "expect”,” estimates", "intends", "anticipates", "believes", "plans"). Such information involves known and unknown risks -- including the availability of funds, the results of financing and exploration activities, the interpretation of exploration results and other geological data, or unanticipated costs and expenses and other risks identified by Riverside in its public securities filings that may cause actual events to differ materially from current expectations. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this press release.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Riverside Resources and Partner Sierra Madre Outline High Grade Silver in Drilling and Trench Results From the Jesus Maria Mine Area at the Penoles Project in Durango, Mexico

November 16, 2011 – Vancouver, BC: Riverside Resources Inc. ("Riverside" or the "Company") (TSX-V: RRI) and its partner, Sierra Madre Developments (TSX-V: SMG), are pleased to announce high grade silver drill and surface trench results from the Jesus Maria Mine area at the Penoles Project, Durango Mexico. A single hole was drilled to test beneath the historic mine workings and trenches that have now been completed and this hole encountered multiple zones of silver-gold with associated lead and zinc mineralization. The trenching outlined new mineralization along strike, and confirmed previous results, reported by Riverside. The trenching delineated aggregate mineralized zones up to 20 meters in thickness (Trench 2). Six new trenches were completed by Sierra Madre to bedrock and identified high grade mineralized intervals up to 13.4 meters in width (Trench 4) averaging 1.7 g/t gold, 309 g/t silver, 2.4% lead and 0.6% zinc (including a 6.9 meter interval that averaged 3.1 g/t gold, 552 g/t silver 4.6% lead and 0.6% zinc). A summary of trench results is available on the Company’s website.

The single drill hole that was completed below the historic mine workings at Jesus Maria encountered the highest individual silver value in this current program (1,757.7 g/t silver from a 0.2 meter wide interval) as well as intersecting three, mineralized intervals with an aggregate thickness of 8.5 meters. The first interval from 156.95 to 159.95 averaged 0.5 g/t gold, 209 g/t silver, 0.6% lead and 0.9% zinc. The second interval from 165.40 to 168.25 averaged 0.2 g/t gold, 86 g/t silver, 1.3% lead and 2.2% zinc and the third interval from 192.40 to 195.05 averaged 0.1 g/t gold, 91 g/t silver, 2.2% lead and 1.9% zinc. The 8.5 meter aggregate assay averaged 0.3 g/t gold, 131 g/t silver, 1.3% lead and 1.6% zinc. Summarized results from JM-DDH-11-01 are also included on the Company’s website.

“Jesus Maria mine area has been one of the highest grade and most prolific mine zones in the >340 km sq Capitan Project Area and these new drill results prove the mineralization and potential mining can continue further than ever recognized,” stated John-Mark Staude, President and CEO of Riverside Resources Inc. “The trenches have extended the length of the Jesus Maria mineralized zone and confirm that mineralization is still open along strike. Riverside looks forward to robust drilling of the Jesus Maria vein system and other major silver-gold vein systems in the Penoles District. Riverside is pleased to see Sierra Madre continue funding exploration and de-risking the property,” added Staude.

schematic-trench-and-drill-intercept-at-jesus-maria

The thickness and continuity of the mineralized zone observed at Jesus Maria shows that in addition to having potential for oxide gold deposits at the Capitan Hill area, the Penoles Mining District also has potential to host significant silver mineralization that builds on the historic silver-gold production (see press release dated October 24, 2011 regarding recent drilling at El Capitan).

Trench Program Details:

Previous trench results announced on May 5, 2011 by Riverside at Jesus Maria included 8.3 meters averaging 1.68 g/t gold, 144 g/t silver, 2.4% lead and 2.2% zinc and a second trench with 22 meters averaging 1.08 g/t gold, 224 g/t silver, 2.5% lead and 1.7% zinc. The new trench results expand on this previous work and further define the surface extent of silver, lead, zinc, and gold of the Jesus Maria vein system.

The surface expression of the Jesus Maria mineralized vein zone is not well exposed and the historic underground mine workings are not presently accessible. The objectives of the trenching program were to assess the continuity of mineralization at Jesus Maria and determine the average width of the mineralized zone. Surface sampling has confirmed that mineralization extends over a strike length of at least 475 meters. Excavator trenching (Sierra Madre Trench No.1 to No.6) and trenching by Riverside (Riverside Trench No.1 to No.4) has confirmed that mineralization ranges from 7.45 to 22 meters in thickness over a strike length of approximately 275 meters. The existing mine workings are located in the northeastern part of one of the concessions, and the surface outcrop of the Jesus Maria is situated near the northern boundary of these concessions. The Jesus Maria concessions extend over a strike length of approximately 1.6 kilometers and cover the projected down dip extent of the Jesus Maria mineralized zone. Additional trenching is planned to continue tracing the western extensions of the mineralized zone.

Summary assay results obtained from the trenching completed by both Sierra Madre and Riverside Resources and the recently completed single drill hole are available on the Company’s website at www.rivres.com.

Assaying and Qualified Person:

According to Sierra Madre, all trench samples were sealed in numbered plastic bags and transported to Inspectorate Assay labs facility in Durango City, a laboratory certified for the provision of assays and geochemical analysis (ISO:9001-2008). All drill core was placed in numbered boxes and transported to Sierra Madre’s secure core facilities by the drill contractor. Following detailed core logging all core was split using a diamond bladed core saw under the direct supervision of Sierra Madre’s Geologic staff. Half of the core was kept on site in the original core boxes, the second half was placed in labeled and sealed sample bags which were transported directly to the custody of Inspectorate, a laboratory certified for the provision of assays and geochemical analysis (ISO:9001-2008). Samples were transported to Inspectorate’s facilities in Durango, Mexico for prep work and analyzed at their facilities in Reno, Nevada. All samples were prepared using standard industry prep methods followed by fire assay analysis and aqua regia digest for trace elements. All samples with greater than 10 g/t Au were additionally tested by fire assay with a gravimetric finish. Sierra Madre has included industry certified Au standards and blanks within the sample stream in addition to field duplicates as part of the QA/QC program.

The scientific and technical data contained in this news release were prepared under the supervision of Mark J. Pryor, Pr.Sci.Nat, an independent qualified person to Riverside Resources, who is responsible for ensuring that the geologic information provided in this news release is accurate and acts as a "qualified person" under National Instrument 43-101 Standards of Disclosure for Mineral Projects.

About Riverside Resources:

Riverside is a well-funded prospect generation team of focused, proactive gold discoverers with the breadth of knowledge to dig much deeper. The Company currently has approximately $10,000,000 in the treasury and fewer than 35,000,000 shares issued. The Company’s model of growth through partnerships and exploration looks to use the prospect generation business approach to own resources, while partners share in de-risking projects on route to discovery. Additional property information on the Company’s projects can be found on the Riverside Resources Inc. website at www.rivres.com.

ON BEHALF OF RIVERSIDE RESOURCES INC.

"John-Mark Staude"

Dr. John-Mark Staude, President & CEO

For additional information contact:

Joness Lang

Manager, Corporate Development
Riverside Resources Inc.
Phone: (778) 327-6671
Fax: (778) 327-6675
Web: www.rivres.com

Kaley Reid

Corporate Communications
Riverside Resources Inc.
Phone: (778) 327-6671
Fax: (778) 327-6675
Web: www.rivres.com

Certain statements in this press release may be considered forward-looking information. These statements can be identified by the use of forward looking terminology (e.g., "expect”,” estimates", "intends", "anticipates", "believes", "plans"). Such information involves known and unknown risks -- including the availability of funds, the results of financing and exploration activities, the interpretation of exploration results and other geological data, or unanticipated costs and expenses and other risks identified by Riverside in its public securities filings that may cause actual events to differ materially from current expectations. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this press release.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Riverside and Guerrero Exploration Report Initial Drill Results Including 3 Metres of 11.6 g/t Gold at the Chapalota Project

October 17, 2011 – Vancouver, BC: Riverside Resources Inc. ("Riverside" or the "Company") (TSX-V: RRI) is pleased to report positive drill results including 3.0 metres of 11.6 g/t gold (CH-11-07) and 70.2 metres of 11.0 g/t silver (CH-11-08) received from the 2011 drill program at the Chapalota Project in Sinaloa, Mexico. Gold and silver mineralization was intersected in five out of the nine drill holes of the program with intervals highlighted in the table below. Gold was intersected at and along strike of both the Leonas and Habas zones tested by this first ever drill campaign. The nature of the gold and silver mineralization, as observed from geological logging of the drill core and from associated trace element alteration geochemistry, is consistent with that of an orogenic gold system.

At the Leonas target, gold was intersected in quartz veining and fault breccia at depth below and along strike 125 m to the south of the outcrop previously reported as returning rock chip assays up to 32.1 g/t Au. A further 900 m to the southeast along the structural corridor drill hole CH-11-07 returned a 30 cm interval @ 101.5 g/t Au from 165.5 m down hole. At the Habas target zone, located 2 kilometers south of Leonas, an interval of deeply weathered, silicified brecciated intrusive returned 70.2 m @ 11.0 g/t Ag with low level Au associated with it.

“This initial phase of drilling and positive results point toward a shallow discovery, intersected in different spots along strike and remaining wide open for expansion,” stated John-Mark Staude, President and CEO of Riverside Resources Inc. “The initial interpretation of an orogenic shearzone gold model is standing up and could be leading toward a large gold-(silver) system. The Prospect Generator model applied by Riverside is working well as we partner with Guerrero Exploration to carry out drilling on this project. This first drill phase tested mainly the Leonas target and there remains significant drilling potential for Habas and another four target areas identified through recent soil survey and IP work by Riverside,” added Staude.

Highlighted Intervals include:

Drillhole CH-11-02: 1.6 m @ 4.02 g/t Au, 1.5 g/t Ag from 20.3 m, incl. 0.4 m @ 11.4 g/t Au.

Drillhole CH-11-07: 3.0 m @ 11.6 g/t Au, 3.3 g/t Ag from 164.8 m, incl. 0.3 m @ 101.5 g/t Au.

Drillhole CH-11-08: 70.2 m @ 0.05 g/t Au, 11.0 g/t Ag from 0.0 m, incl. 2.6 m @ 52.0 g/t Ag.

Some higher valued Au and Ag mineralized intervals from this first drill campaign are presented in the following table.

Drillhole 

Location 

Mineralized Interval (not true width) 

CH-11-01

Leonas

13.0 m @ 0.089 g/t Au, 11.7 g/t Ag from 3.1 m

CH-11-02

Leonas

1.6 m @ 4.02 g/t Au, 1.5 g/t Ag from 20.3 m, incl. 0.4 m @ 11.4 g/t Au

CH-11-02

Leonas

2.1 m @ 0.83 g/t Au, 1.6 g/t Ag from 47.9 m, incl. 0.4 m @ 2.7 g/t Au

CH-11-06

Leonas

5.5 m @ 0.74 g/t Au, 1.5  g/t Ag from 78.0 m, incl. 1.7 m @ 2.0 g/t Au

CH-11-06

Leonas

10.1 m @ 0.69 g/t Au, 0.3 g/t Ag from 131.7 m, incl.0.3 m @ 4.2 g/t Au

CH-11-06

Leonas

8.6 m @ 0.97 g/t Au, 0.4 g/t Ag from 241.5 m, incl. 1.4 m @ 3.4 g/t Au

CH-11-07

Leonas

3.0 m @ 11.6 g/t Au, 3.3 g/t Ag from 164.8 m, incl. 0.3 m @ 101.5 g/t Au

CH-11-08

Habas

70.2 m @ 0.05 g/t Au, 11.0 g/t Ag from 0.0 m, incl. 2.6 m @ 52.0 g/t Ag

CH-11-08

Habas

1.6 m @ 1.6 g/t Au, 0.4 g/t Ag from 117.4 m

Assaying and Qualified Person:

Samples were taken to Hermosillo, Mexico where ALS Laboratory Group’s mineral division ALS Chemex crushed and pulverized each sample. The rejects remained with ALS Chemex while the pulps were transported to ALS Chemex’s ISO 9001-2008 certified laboratory in NorthVancouver, BC, Canada for analysis. A QA/QC program was implemented as part of the sampling procedures for the exploration program. Duplicate, standard and blank samples were randomly inserted into the sample stream prior to being sent to the laboratory.

The scientific and technical data contained in this news release were prepared under the supervision of Locke Goldsmith, P. Eng., P. Geo., an independent qualified person to Riverside Resources, who is responsible for ensuring that the geologic information provided in this news release is accurate and acts as a "qualified person" under National Instrument 43-101 Standards of Disclosure for Mineral Projects.

Property Overview:

The 91 km² Chapalota Property is located on the western margin of the Sierra Madre Occidental Region approximately 50 km northeast of the city of Mazatlan in south-central Sinaloa, Mexico. The Chapalota Property is located near several past producing mines that are now being redeveloped and expanded. The Property is 50 km to the south of Silvermex’s Rosario deposit, 70 km to the north of Oro Mining’s La Trinidad deposit and 200 km south of US Gold’s Majistral deposit in an abundantly rich mining region of Mexico. Recent work with Guerrero Exploration including IP and soil surveys refined six target areas, two of which have now been drilled. There remain at least four drill target areas and three former mining areas that have not been drill tested on the property.

About Riverside Resources:

Riverside is a well-funded prospect generation team of focused, proactive gold discoverers with the breadth of knowledge to dig much deeper. The Company currently has approximately $10,000,000 in the treasury and fewer than 35,000,000 shares issued. Riverside`s model of growth through partnerships and exploration looks to use the prospect generation business approach to own resources, while partners share in de-risking projects on route to discovery. Additional property information on the Company’s projects can be found on the Riverside Resources Inc. website at www.rivres.com.

ON BEHALF OF RIVERSIDE RESOURCES INC.
"John-Mark Staude"
Dr. John-Mark Staude, President & CEO
For additional information contact:

Joness Lang

Manager, Corporate Communications

Or Kaley Reid
Corporate Communications

Riverside Resources Inc.
info@rivres.com
Phone: (778) 327-6671
Fax: (778) 327-6675
Web: www.rivres.com

Certain statements in this press release may be considered forward-looking information. These statements can be identified by the use of forward looking terminology (e.g., "expect”,” estimates", "intends", "anticipates", "believes", "plans"). Such information involves known and unknown risks -- including the availability of funds, the results of financing and exploration activities, the interpretation of exploration results and other geological data, or unanticipated costs and expenses and other risks identified by Riverside in its public securities filings that may cause actual events to differ materially from current expectations. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this press release.

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