Sixty North Gold Updates Scheduled Development at Mon Gold Mine, NWT

Vancouver, British Columbia--(Newsfile Corp. - May 19, 2026) - Sixty North Gold Mining Ltd. (CSE: SXTY) (FSE: 2F40) (OTC Pink: SXNTF) (the "Company" or "Sixty North Gold") is pleased to provide an update on its plan to commence gold production this year on its wholly-owned Mon Gold Mine, Yellowknife, NWT.

As reported April 2, 2026, all of the Company's mining and milling equipment is currently at the Mon Gold Mine site north of Yellowknife. The mobilization was completed without any lost-time accidents, on budget and without any adverse events. The remnants of the camp that was lost to the wildfires in 2023 were removed from site and disposed of in an authorized disposal facility. Scrap metals and damaged batteries were delivered to a licensed recycle facility in Yellowknife.

A site visit on May 6 confirmed that the site remained partially snow covered, the lakes were largely ice covered with minor open water at the smallest of lakes and portions of the larger rivers. We remain on schedule for a late-May to early-June breakup at which time crews and domestic supplies can be mobilized by float planes.

Photo 1. Northeast view of the Mon Gold Mine site May 6, 2026 showing light snow on the ground and the still frozen lakes. The camp is in place mid-photo and the containers containing the mill are located next to the mine shops, compressors and generators, south of the blasted mill pad.

To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/5873/297951_81beaadb1458da1f_001 ...

The Company has submitted twelve management plans and has received approval for six from the Mackenzie Valley Land and Water Board ("MVLWB"). The MVLWB requested revisions to three of the remaining management plans with the Mill Design and Construction Plan, Ore Stockpile Design and Management Plan, and the Waste Rock Design and Management Plan undergoing the initial submissions. The Dry Stack Tailings Design and Construction Plan with Operation Plans will be submitted, together with a resubmission of the Dry Stack Tailings Management Plan in late May.

Dave Webb, President & CEO reports: "We now await spring and regulatory approvals as we prepare to commence mill construction, which is expected to take a minimum of 60 days. The start of operations at the permitted 100 tpd design rate is planned to commence this summer. We have prepared four stopes below the historic stopes that had produced at 30 gpt gold for mining and can be extracting gold-bearing vein material within a week of start up. Our deepest development now is 32 m below surface. The average depth of the three past producing gold mines in the Yellowknife Gold Belt is from surface to depths >1,300 m. Continued development to depth is planned."

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