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Riverside Resources and Questcorp Mining Execute Definitive Option Agreement for La Union Project, Sonora, Mexico

Mergers & Acquisitions Property Options & Staking

Riverside Resources and Questcorp Mining

Execute Definitive Option Agreement for La

Union Project, Sonora, Mexico

Vancouver, British Columbia--(Newsfile Corp. - May 6, 2025) -

Riverside Resources Inc.

(TSXV: RRI)

(OTCQB: RVSDF) (FSE: 5YY) ("Riverside" or the "Company"),

is pleased to announce that further

to its press release dated September 6, 2024, Riverside's wholly-owned subsidiary, RRM Exploracion,

S.A.P.I. DE C.V. (the "

Vendor

") has entered into a definitive option agreement (the "

Option

Agreement

") with Questcorp Mining Inc. ("

Questcorp

") dated May 5, 2025, for the 2,520.2 hectare La

Union carbonate replacement gold- polymetallic project (the "

Project

" or "

La Union

") located in Sonora,

Mexico (the "

Transaction

").

"We are thrilled to finalize this agreement for the La Union Project, which is a strong asset in Riverside's

portfolio. Securing up to C$5,500,000 in exploration funding from Questcorp is an excellent step forward

in advancing this larger Carbonate Replacement Deposit ("

CRD

") project," said John-Mark Staude,

CEO of Riverside Resources. "Riverside is pleased to have the updated NI 43-101 Technical Report

completed and we see an active exploration program launching in the coming weeks with Riverside as

the Operator of the exploration program. Riverside is expected to become a shareholder of Questcorp

with an initial 9.9% equity interest, subject to final approval by the Canadian Securities Exchange or

confirmation that such approval is not required. The first-year work program of C$1,000,000 in

exploration expenditures will launch the first round of exploration at the project."

The La Union Project

The Project is summarized on the Riverside website and is a project that Riverside acquired and further

consolidated additional inlier mineral claims.

The Project initially identified from Riverside's work in the

western Sonora gold belt through work with AngloGold Ashanti Limited, Centerra Gold Inc., and

Hochshild Mining Plc, among others as partners and funding relationships for gold exploration.

Initial

work by members of the Riverside team, drawing on more than two decades of geological compilation

and analysis, identified this region as highly prospective.

At the Project, historical mining by the Penoles

Mining Company focused on chimney and manto replacement bodies within the upper oxide zones. As a

result, the underlying sulfide zones present immediate drill targets for further exploration.

Riverside has spent the past five years consolidating this highly prospective land package, which totals

over 22 square kilometers. The Project features favorable limestone host rocks, an extensive alteration

footprint, and multiple small-scale historical workings, providing more than eight drill-ready target areas.

Key immediate targets include the central Union Mine and the nearby Famosa Mine. With drive-up

access, private ranch surface rights, and strong geologic similarities to other major CRDs in Arizona and

eastern Mexico, La Union is well positioned for near-term exploration success targeting both oxide and

deeper sulfide mineralization.

The Option Agreement

In accordance with the terms of the Transaction, Questcorp can acquire a one-hundred percent (100%)

interest in the Project in consideration for completion of a series of cash payments totaling $100,000

CAD, making staged issuances of common shares of Questcorp totaling 19.9%, and incurring

$5,500,000 CAD of exploration expenditures on the Project as outlined immediately below:

Deadline

Cash Payment

Share Issuance

Exploration

Expenditures

Within two (2) business days of the date of the Option Agreement

$25,000

N/A

N/A

On the Effective Date

(1)

N/A

9.9%

(2)

N/A

On or before the first anniversary of the Effective Date

N/A

14.9%

(2)(3)

$1,000,000

On or before the second anniversary of the Effective Date

$25,000

19.9%

(2)(3)

$1,250,000

On or before the third anniversary of the Effective Date

$25,000

19.9%

(2)(3)

$1,500,000

On or before the fourth anniversary of the Effective Date

$25,000

19.9%

(2)(3)

$1,750,000

Total

$100,000

19.9%

(2)(3)

$5,500,000

Notes:

1

.

"Effective Date" means the date on which Questcorp delivers to the Vendor a copy of the written approval of the Canadian Securities Exchange

in respect of the transactions contemplated by the Option Agreement.

2

.

Issuable within the fifth business day after the applicable date.

3

.

Expressed as a cumulative total percentage of the undiluted issued and outstanding common shares of Questcorp as of the applicable payment

date, and assuming Riverside has not previously disposed of any common shares.

During the term of the Option Agreement, Riverside, through the Vendor, will remain the program

operator for the Project using its local team based in Hermosillo, Sonora. Following exercise of the

option under the Option Agreement, Questcorp will grant Riverside a two-and-one half percent (2.5%)

net smelter return royalty on commercial production from the Project.

Figure 1. Geologic map with the tenure of the Union internal concession shown in pink.

Manto and

chimney type CRD targets are shown as red polygons. Riverside now controls all mineral tenures on this

map.

To view an enhanced version of this graphic, please visit:

https://images.newsfilecorp.com/files/6101/250896_df59d6431499eba6_002full.jpg

Figure 2. Cross section looking west with proposed drill sites and drillhole traces.

Assays from

Riverside's sampling of rock dump materials from the two mine areas are labeled in black.

Red areas

are interpreted as manto and chimney target bodies that are now well defined and drill ready.

Assays

shown on figures 1 and 2 have been previously released and disclosed as summarized below the

geochemical QA/QC.

To view an enhanced version of this graphic, please visit:

https://images.newsfilecorp.com/files/6101/250896_df59d6431499eba6_003full.jpg

Qualified Person & QA/QC:

The scientific and technical data contained in this news release pertaining to the Project was reviewed

and approved by Freeman Smith, P.Geo, VP Exploration, a non-independent qualified person to

Riverside Resources Inc., who is responsible for ensuring that the information provided in this news

release is accurate and who acts as a "qualified person" under National Instrument 43-101 Standards of

Disclosure for Mineral Projects.

Rock samples from previous exploration programs discussed above at the Project were taken to the

Bureau Veritas Laboratories in Hermosillo, Mexico for fire assaying for gold. The rejects remained with

Bureau Veritas in Mexico while the pulps were transported to Bureau Veritas laboratory in Vancouver,

BC, Canada for 45 element ICP/ES-MS analysis using 4-acid digestion methods. A QA/QC program

was implemented as part of the sampling procedures for the exploration program. Standards were

randomly inserted into the sample stream prior to being sent to the laboratory.

About Riverside Resources Inc.:

Riverside is a well-funded exploration company driven by value generation and discovery. The Company

has over $4M in cash, no debt and less than 75M shares outstanding with a strong portfolio of gold-silver

and copper assets and royalties in North America. Riverside has extensive experience and knowledge

operating in Mexico and Canada and leverages its large database to generate a portfolio of prospective

mineral properties. Riverside has properties available for option, with information available on the

Company's website at

www.rivres.com

.

ON BEHALF OF RIVERSIDE RESOURCES INC.

"John-Mark Staude"

Dr. John-Mark Staude, President & CEO

For additional information contact:

John-Mark Staude

President, CEO

Riverside Resources Inc.

[email protected]

Phone:

(778) 327-6671

Fax:

(778) 327-6675

Web:

www.rivres.com

Eric Negraeff

Corporate Communications

Riverside Resources Inc.

[email protected]

Phone: (778) 327-6671

TF: (877) RIV-RES1

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 risk that the Transaction will not be completed as contemplates, or at all, 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.

To view the source version of this press release, please visit

https://www.newsfilecorp.com/release/250896