i-80 Gold Reports High-Grade Assay Results at Archimedes Underground Project Including 24.6 g/t Au Over 23.6 Meters; Development Advancing on Schedule

TORONTO, April 8, 2026 /PRNewswire/ – i-80 GOLD CORP. (TSX: IAU) (NYSE American: IAUX) („i-80 Gold“, or the „Company“) is pleased to announce assay results from its recent drilling campaign at the Archimedes Underground Project („Archimedes“ or the „Project“), located on the Company’s Ruby Hill property at the southeastern end of the Battle Mountain-Eureka Trend in northeastern Nevada, United States (see Figure 1 in Appendix).

The Company commenced construction of Archimedes, the Company’s second underground project, in the third quarter of 2025. Material from Archimedes, in addition to Granite Creek underground, is expected to begin feeding the Company’s Lone Tree processing plant by late 2027, subject to the completion of the plant’s proposed refurbishment. Until that time, the Company’s underground material from Archimedes will be processed through a third-party toll milling agreement.

As of December 31, 2025, Archimedes hosts an indicated gold mineral resource of 436,000 ounces at 7.6 grams per tonne and an inferred gold mineral resource of 988,000 ounces at 7.3 grams per tonne⁽¹⁾. The majority of the resource is currently hosted in the Ruby Deeps zone, which is situated below the 5100-foot elevation within the deposit („Lower Archimedes“) (see Figure 2 in Appendix).