Mistango Expands Omega Gold Property by 60%

Highlights:

• Omega hosts a global resource of 585 Koz of gold.
• Omega now comprises 15 leased claims and 10 patents.
• Property size increased from 257 hectares to 400 hectares.
• Strategic Growth Asset in a world-class District Close to MAG Silver, Agnico Eagle and Gold Candle.

Toronto, Ontario--(Newsfile Corp. - May 20, 2025) - Mistango River Resources Inc. (CSE: MIS) ("Mistango" or the "Company") is pleased to announce that it has entered into a purchase agreement to acquire 100% of the McVittie Property ("McVittie") immediately adjacent to its 100%-owned Omega Gold Project ("Omega") to the north.

McVittie Property now consolidated into the Omega Gold Project

McVittie is located in south-central McVittie Township, in the Larder Lake Mining Division of Ontario, approximately 25km east of Kirkland Lake, Ontario. McVittie comprises eight patents with surface and mining rights, and is contiguous with the northern portion of Omega. The acquisition has increased Omega's property size from 257 hectares to 400 hectares.

Figure 1) Link to Map of McVittie Project, Expanding Omega

Figure 2) Map of Major Resources of the Kirkland Lake / CLLB District

Omega is Central to the Cadillac-Larder Lake Break consolidation strategy

Omega historically produced ~215,000 ounces grading 5.41 g/t gold between 1926-1928 and 1936-1947. Omega currently hosts an open pitable resource, including a Measured and Indicated Resource of 4.92 Mt grading 1.39 g/t gold (219.8 Koz), and an Inferred Resource of 4.69 Mt grading 2.43 g/t gold (365.4 Koz). Having a global resource of 585 Koz gold, Omega is a strategic growth asset in a multi-million-ounce gold district that is primed for consolidation—the Cadillac Larder Lake Break ("CLLB")¹.

The prolific CLLB, and the larger Kirkland Lake district, host some of the highest-grade gold resources globally. Immediately adjacent to and surrounding Omega, MAG Silver's Larder Project hosts a historical indicated resource 388 Koz grading 2.39 g/t gold, and a historical inferred resource of 933 Koz grading 4.21 g/t gold². Near the town of Kirkland Lake, Ontario (30km west of Omega), the Cadillac Break hosts Agnico Eagle's Macassa Mine, one of the world's highest grade gold deposits, producing at an average grade of 15 g/t gold³. Located 10km east of Omega, in the town of Virginia town, the historical Kerr Addison mine produced 11 Moz at 9 g/t gold, and currently hosts an indicated resource of 3.31 Moz grading 1.5 g/t gold, and an inferred resource of 2.36 Moz grading 1.3 g/t gold⁴. North of Omega and the CLLB, Agnico Eagle is developing their Upper Beaver deposit, which hosts 3.6 Moz gold⁵.