i-80 Gold Reports New High-Grade Assay Results Reinforcing Resource Expansion Potential at Granite Creek Underground Project

TORONTO, Jan. 20, 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 2025 drilling campaign at the Granite Creek Underground Project („Granite Creek Underground“ or the „Project“). New assay results from 40 holes continue to demonstrate robust high-grade mineralization throughout the South Pacific Zone (the „SPZ“) confirming expansion of the mineralized envelope and potential for mineral resource expansion to the north and at depth (see Figures 1 and 2 in Appendix).

The Project is i-80 Gold’s first underground gold operation and ramp-up activities continue to advance toward steady-state gold output. The Company is currently mining the top of the southern portion of the SPZ. As of December 31, 2024, Granite Creek Underground hosted a measured and indicated gold mineral resource estimate of 261,000 ounces at 10.5 grams per tonne and an inferred gold mineral resource of 326,000 ounces at 13.0 grams per tonne. Granite Creek Underground is located along the prolific Getchell Trend in northern Nevada, approximately 10 kilometers south of Nevada Gold Mines‘ Turquoise Ridge Complex which currently hosts an estimated 18 million ounces of measured and indicated gold mineral resources and 2.5 million ounces of inferred gold mineral resources ⁽¹⁾  (see Figure 3 in Appendix).

A total of 16,000 meters were drilled over 46 holes as part of the 2025 drilling program at Granite Creek Underground, which began in June 2025 and concluded in December 2025. The overall program included an additional six infill holes relative to the original plan to test and confirm continuity of mineralization ahead of the planned feasibility study. The results of seven step-out holes, as part of the overall program, reinforced the Company’s belief in the potential to expand mineralization at SPZ and ultimately extend the Project’s mine life. The most recent assay results are provided in Table 1 below and include the first six holes announced in a press release on September 10, 2025⁽²⁾ (to view the announcement, click here).