Rochester Announces Start up of New Processing Circuit

TSX Venture: RCT

Frankfurt: R5I

Suite 1305-1090 W. Georgia St., Vancouver, BC, V6E 3V7  Phone: 604.685.9316 Fax: 604.683.1585

News Release

ROCHESTER ANNOUNCES START UP OF NEW PROCESSING CIRCUIT

Vancouver, British Columbia – March 24th , 2025: - Rochester Resources Ltd. (the “Company” or “Rochester” )

(TSXV: RCT) provides this update further to the Company’s news release of November 21, 2024.

Since 2007, the Mina Real processing plant has been treating mineralized material from the Estanzuela Unit, with

additional material from the San Francisco Unit since 2014. The plant employs a conventional cyanidation process,

including crushing, grinding, and chemical treatment.

The Company has conducted mining operations without defined mineral resources and the production decision

was not based on a feasibility study of mineral reserves that has demonstrated technical or economic viability.

Historically, material from these two sources has contained high levels of manganese, which has negatively impacted

silver production. Since November 2024 the Company has been making plant modifications to increase silver

recoveries and as of March 21st 2025 the new circuit commenced operations. The Company is utilizing a proprietary

process to increase silver recoveries.

The initial phase of plant modifications cost approximately U.S. $1.45 million with funding provided by Company

Chairman and director, Eduardo Luna, and a company affiliated with Rochester President, Nick DeMare. The interest

rate of 24% charged on this initial funding has been approved by the independent directors. The bal ance of the

funding needed for plant modifications will come from operations.

ON BEHALF OF THE BOARD

“Nick DeMare”

CEO and Director

Tel: 604.685.9316

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.