Mr. Eric Zaunscherb reports

GR SILVER MINING ANNOUNCES TEMPORARY PLOMOSAS SILVER PROJECT FIELD WORK PAUSE

GR Silver Mining Ltd. has temporarily paused fieldwork on the Plomosas silver project in Sinaloa, Mexico. Although there have been no incidents of violence on the company's properties and no threats to the company or its employees or consultants in accessing the company's project, management has decided to temporarily pause fieldwork to allow time for the considerable efforts of the government of Mexico to increase security and stability in the project region.

On March 3, 2025, the company announced the commencement of a stepout drilling program aiming to expand the San Marcial mineralization footprint by as much as 350 metres northwest from the current National Instrument 43-101 resource area as well as test potential new parallel zones. The company has drilled and sampled the first hole of its initial program in the NW Extension zone, representing a stepout drilling program from the current resource area. It has also completed surface evaluation along 500 metres of strike length, focused on a prospective geological contact with evidence of silver mineralization and seeking blind targets. Initial field results indicate new prospective drilling targets along this potential mineralization footprint extension.

This program will resume when management considers it prudent to do so as the safety of the company's employees, consultants, suppliers and community members is paramount. In the interim, the company's geologists and other staff will continue their work based at the company's office in El Rosario, nearby the Plomosas silver project. Exploration work at the Rosario office will comprise continuous data modelling of the information collected to date, which supports the presence of newly discovered, wide, high-grade silver-dominant hydrothermal breccias in the vicinity of the San Marcial resource area.

Management will continue third party discussions to facilitate commencement of a bulk sampling test mining program at the permitted former Plomosas mine and explore opportunities to achieve critical mass in the Mexican silver mining industry.

About GR Silver Mining Ltd.

GR Silver Mining is a Canadian-based, Mexico-focused junior mineral exploration company engaged in cost-effective silver-gold resource expansion on its 100-per-cent-owned assets, located on the eastern edge of the Rosario mining district, in the southeast of Sinaloa state, Mexico. GR Silver Mining controls 100 per cent of the Plomosas project, including the former Plomosas underground mine and wide, high-grade silver-mineralized zones at the San Marcial area. Recent discoveries in the 78 square kilometres of highly prospective advanced-stage exploration concessions position the company well in the pursuit for resource expansion at the Plomosas project.

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