Dr. John-Mark Staude reports

RIVERSIDE RESOURCES PROVIDES UPDATE ON QUESTCORP OPTION AGREEMENT AT UNION PROJECT, SONORA, MEXICO

Riverside Resources Inc. has provided an update regarding the option agreement with Questcorp Mining Inc. on the Union project announced on May 6, 2025. Questcorp has issued 6,285,722 common shares, representing 9.9 per cent of Questcorp's issued and outstanding shares as of May 20, 2025, to Riverside. In addition, Questcorp has completed a cash payment of $25,000 to Riverside. These steps have been undertaken pursuant to the terms and conditions of the option agreement dated May 5, 2025, among Questcorp, Riverside Resources and Riverside's wholly owned Mexican subsidiary, RRM Exploracion SAPI de CV, in respect of the Union project, which Riverside has progressed the exploration and property consolidation over the past few years and now the project is set to move ahead with this partner financing.

Riverside, as operator of Union project, is advancing the predrilling work, including organizing the field team, access and sourcing water that would be needed for drilling later this year. The company's Mexico-based technical team is currently finalizing contractor selection and mobilization for an initial fieldwork program and then will conduct the predrilling geophysical survey. This will be followed by more detailed work aimed at refining high-priority drill targets identified during previous fieldwork. The Union project lies within the productive Sonora carbonate replacement belt and hosts multiple historical mine workings, strong surface mineralization and favourable structural controls, making it highly prospective for gold-silver-lead-zinc and copper discoveries.

"We are encouraged by Questcorp's progress on the option of the Union project and are pleased to be executing the next steps in our agreement," stated Dr. John-Mark Staude, president and chief executive officer of Riverside Resources. "Our field team in Sonora is now lining up access, camp logistics and exploration fieldwork, which lays the key groundwork to progress with the geophysical work that will be coming in the near future. The upcoming work will focus on integrating surface mapping, geochemical data and then [use] geophysics to sharpen our drill targeting in this promising CRD [carbonate replacement deposit] system."

For further details on option agreement, please refer to the press release of May 6, 2025, on Riverside's website and on SEDAR+.

Qualified person and quality assurance/quality control

The scientific and technical data contained in this news release pertaining to the project was reviewed and approved by Freeman Smith, PGeo, vice-president, exploration, a non-independent qualified person to Riverside Resources, 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.

About Riverside Resources Inc.

Riverside is a well-financed exploration company driven by value generation and discovery. The company has over $4-million in cash, no debt and less than 75 million 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.

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