Mr. Thomas Atkins reports

MAMMOTH BEGINS FIELD ACTIVITIES AT ITS TENORIBA GOLD-SILVER PROPERTY, MEXICO

Mammoth Resources Corp. has begun field activities at its 100-per-cent-owned Tenoriba gold-silver project, Chihuahua state, Mexico.

Company geologists and a consulting metallurgist are on site with the intention of: (1) reviewing drill core from its 55 prior diamond drill holes distributed over an approximately four-kilometre (km) strike length in three primary gold, silver and occasionally copper mineralized areas where a combination of thousands of soil, surface chip and channel samples occurs with the diamond drilling in a high sulphidation geological system, (2) assess the state of access roads from camp and Mammoth's core storage area to the three primary mineralized areas, including the large 1.5-kilometre-by-500-metre (m) Carneritos area, together with the Masuparia and the Moreno areas, (3) assess drill pad access and locations for its permitted phase 1, 60-hole maiden mineral resource, diamond drill program (refer to press release dated April 16, 2026) and (4) to collect up to a 200-kilogram (kg) sample from the previously announced (press release dated Feb. 26, 2026) potential draw point areas within the large Carneritos area at Tenoriba for advanced production size, coarser fraction vat, and column and leach tests as an advanced step to designing initial, small-scale, gold-silver leaching of oxidized gold-silver mineralized material.

Thomas Atkins, president and chief executive officer of Mammoth Resources, commented on Mammoth's return to the field, stating, "We're excited to be on the ground at Tenoriba working to advance steps towards drilling what we believe could be a substantial maiden mineral resource at Tenoriba while at the same time also assessing a significantly advanced step to understanding gold-silver recoveries via a columns simulating material coarseness and leach pad dynamics in a production-like leaching scenario.

The company looks forward to providing additional updates as this work is completed and we consider next steps toward maiden resource definition drilling and initial pilot-scale production at Tenoriba.

Quality assurance and quality control (QA/QC)

All data used for the drill spacing study followed QA/QC controls as outlined on the Mammoth Resources website news, and drill results press releases spanning the period Nov. 18, 2021, to Dec. 15, 2022.

Qualified person(s)/competent person(s) (QP/CP)

Richard Simpson, PGeo, vice-president, exploration, for Mammoth Resources is Mammoth's QP/QC under National Instrument 43-101 by virtue of his professional designation, university degree and years of work experience as a geologist and is responsible for and has reviewed all technical data in this release.

About Mammoth Resources Corp.

Mammoth Resources (TSX-V: MTH) is a precious metal mineral exploration company focused on acquiring and defining precious metal resources in Mexico and other attractive mining friendly jurisdictions in the Americas. The company holds a 100-per-cent interest (subject to a 2-per-cent net smelter royalty purchasable anytime within two years from commencement of commercial production for $1.5-million (U.S.)) in the 5,333-hectare Tenoriba gold property located in the Sierra Madre precious metal belt in southwestern Chihuahua state, Mexico. Mammoth is seeking other opportunities to option exploration projects in the Americas on properties it deems to host above average potential for economic concentrations of precious metals mineralization. Mammoth recently entered into a strategic alliance with RM Mineria S de RL de CV of Mexico in pursuit of additional advanced development and near-term production opportunities in Mexico.

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