Mr. Tyler Hill reports

I-80 GOLD REPORTS NEW HIGH-GRADE ASSAY RESULTS REINFORCING RESOURCE EXPANSION POTENTIAL AT GRANITE CREEK UNDERGROUND PROJECT

i-80 Gold Corp. has released assay results from its 2025 drilling campaign at the Granite Creek underground 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.

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 Dec. 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 kilometres 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.

A total of 16,000 metres 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 stepout 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 and includes the first six holes announced in a press release on Sept. 10, 2025.

Highlight results from infill holes in 2025 drilling at the SPZ;

• 40.4 g/t Au over 13.2 m in hole iGU25-31;
• 31.3 g/t Au over 7.8 m in hole iGU25-15;
• 15.0 g/t Au over 17.5 m in hole iGU25-24;
• 12.8 g/t Au over 19.8 m in hole iGU25-08.

"The 2025 infill drilling results at Granite Creek underground successfully support our geological model, confirming the continuity and high-grade nature of the deposit. The South Pacific zone remains open to the north and at depth and will continue to be tested through additional drilling in the coming years," stated Tyler Hill, vice-president of geology. "The drill program was a key step in advancing the upcoming Granite Creek underground feasibility study. Importantly, these drill results reinforce our view that similar success could be achieved with the planned 2026 drill programs at Archimedes underground and Mineral Point open pit on the Ruby Hill property. This confidence is supported by comparable results from our Cove underground project, which shares a similar structural framework and sedimentary rock-hosted disseminated mineralization present within each of these projects."

The 2025 drill program was primarily focused on infill drilling to support the conversion of mineral resources from the inferred mineral resource category to the indicated category. Seven holes also tested the expansion potential of the SPZ to the north and at depth. Results from the 2025 drill program will be combined with infill drilling data from 2023 and 2024 to produce an updated mineral resource estimate using three years of additional data. This mineral resource estimate will form the basis of the upcoming Granite Creek underground feasibility study, which is expected to be completed late in the first quarter of 2026, with results to be released in the second quarter of 2026. The current mineral resource estimate in the PEA filed in March, 2025, did not include data from drilling conducted in 2023 and 2024. The company filed results from a preliminary economic assessment on Granite Creek underground in March, 2025 (the PEA), outlining an approximate eight-year mine life with an average annual gold production of approximately 60,000 ounces, following production ramp-up.

The company is currently evaluating the timing of an additional step out and infill drilling campaign for the SPZ in 2026 as part of a multiyear drill program.

Technical disclosure and qualified persons

The technical information contained in this press release has been prepared under the supervision of, and has been reviewed and approved by Paul Chawrun, PEng, chief operating officer, and Tyler Hill, CPG, vice-president, geology, for the company, each of whom are qualified persons within the meaning of National Instrument 43-101 -- Standards of Disclosure for Mineral Projects and Subpart 1300 of Regulation S-K.

All samples were submitted to MSALABS (MSA) of Elko, Nev., which is an accredited laboratory, independent of the company. Samples submitted through MSA are crushed to 80 per cent passing two millimetres and analyzed using CPA-Au1 (Au; 500-gram photon assay). MSA also undertakes their own internal coarse duplicate analysis to ensure proper sample preparation and equipment calibration. i-80 Gold Corp's QA/QC (quality assurance/quality control) program includes regular insertion of CRM standards, duplicates and blanks into the sample stream with a stringent review of all results. Mineral resources do not have demonstrated economic viability and are not mineral reserves.

About i-80 Gold Corp.

i-80 Gold is a Nevada-focused mining company committed to building a mid-tier gold producer through a new development plan to advance its high-quality asset portfolio. The company is the fourth-largest gold mineral resource holder in the state with a pipeline of high-grade development and production-stage projects strategically located in Nevada's most prolific gold-producing trends. Leveraging its central processing facility following an anticipated refurbishment, i-80 Gold is executing a hub-and-spoke regional mining and processing strategy to maximize efficiency and growth. i-80 Gold's shares are listed on the Toronto Stock Exchange (TSX: IAU) and the NYSE American (NYSE: IAUX).

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