Kirkland Lake Discoveries drills 103 metres of continuous gold mineralization at Mirado property, Ontario

Kirkland Lake Discoveries Corp. [TSXV: KLDC; OTCQB: KLKLF] reported assay results from its ongoing 2026 diamond drilling program at the past-producing Mirado property, located 20 km southeast of Kirkland Lake, Ontario.

The first drill hole targeting the South Zone at Mirado, confirms mineralization originally identified by Golden Shield Resources in the 1980s and is integral to advancing and expanding the modern understanding of this mineralizing system. Drilling continues at Mirado with a fence of holes testing the extent of mineralization along strike and at depth at the South Zone and testing mineralization at the North Zone.

Highlights – KLM26-001: 1.10 g/t Au over 15.1 metres from 39.6 metres to 54.6 metres; 5.66 g/t Au over 18.2 metres from 62.0 metres to 80.2 metres, including 23.03 g/t Au over 4.3 metres; 3.30 g/t Au over 18.7 metres from 96.7 metres to 115.3 metres, including 5.49 g/t Au over 4.9 metres, and 3.92 g/t over 4.1 metres.

KLM26-001B Wedge: 1.78 g/t Au over 23.9 metres from 88.5 metres to 112.5 metres. Visible gold observed in multiple holes; broad zones of continuous mineralization; expedited assay results through Paragon and use of PhotonAssay™.

Stefan Sklepowic, CEO, commented, “Intercepting 5.66 g/t gold over 18.2 metres in our very first hole at Mirado is an exceptional start to this program. These results confirm a robust gold system with the potential for both bulk-tonnage scale and high-grade zones. With mineralization open in multiple directions, we believe we are only beginning to unlock value at KL South.”

“One of the fascinating things about this project is that the highlight table doesn’t always tell the story. We have an extremely broad and prolific system here at Mirado. Historically this may have been missed, and this drill hole exemplifies the potential scale with 103 metres of continuous mineralization,” commented Denis Laviolette, KLDC Executive Chairman.

The Mirado system hosts two distinct and complementary styles of gold mineralization, of which, the South Zone style has been reinforced by the current drill results. The South Zone is defined by high-grade, structurally controlled gold mineralization hosted in quartz-carbonate/chlorite vein arrays within lower grade envelopes. On the other hand, the North Zone comprises semi-conformable, stratigraphically controlled sulphide mineralization within felsic volcaniclastics, which ongoing drilling is testing.

Results reported herein not only confirm the presence and continuity of historically defined gold mineralization but also demonstrate clear continuity of mineralization downhole. These results support the Company’s evolving geological model and highlight the significant growth potential of the Mirado system, with multiple zones remaining open for expansion.

The combination of wide intervals and consistent mineralization suggests strong potential for a bulk-tonnage system, complemented by higher-grade zones that could enhance project economics.

Initial results from the 2026 drill program demonstrate meaningful progress across several of the Company’s stated objectives, including the confirmation of historical mineralization, successful infill of key zones, and the extension of gold mineralization both laterally and at depth. Drilling to date has validated the presence of high-grade mineralization within the South Zone while also supporting the continuity of stratigraphically controlled mineralization in the North Zone. These results are contributing to an increasingly robust geological dataset and are being actively integrated into a developing 3D model, refining the Company’s understanding of structural controls and mineralization trends.

With this foundation in place, the ongoing drilling will continue to focus on step-out targeting along strike and at depth, while systematically testing newly identified structural and geophysical targets. Ongoing work will also prioritize further data density to support future resource modeling, as the Company advances Mirado’s broader growth potential.

To ensure rapid market communication and superior analytical precision, KLDC has made the strategic decision to move forward with Paragon Geochemical to utilize Chrysos PhotonAssay™ technology for the 2026 program at KL South.

Unlike traditional fire assay, PhotonAssay™ uses high-energy X-rays to excite atomic nuclei, providing a non-destructive, faster, and more environmentally friendly analysis of larger (~500 g) samples. This is particularly critical for the Mirado property, where the presence of “nuggety” or coarse gold can lead to grade variability in smaller samples. By utilizing this state-of-the-art technology, the company expects to significantly reduce turnaround times for drill results while improving the statistical reliability of high-grade intercepts.

By operating in a Tier-1 mining jurisdiction with a focused exploration budget, Kirkland Lake Discoveries Corp. is committed to advancing Mirado from a historical prospect into a modern, well-defined gold asset in the Abitibi Greenstone Belt.

The latest episode of KLDC’s Treasure Hunters series on YouTube follows the ongoing journey for discovery in Kirkland Lake. Follow along with Senior Project Geologist Drake Hyden as he discusses the core from our ongoing drill program at Mirado and features video of the core from this release.

Kirkland Lake Discoveries has assembled a 420-km² exploration portfolio in the Kirkland Lake region of Ontario’s Abitibi Greenstone Belt, one of the most prolific mining districts in the world. The company’s properties span key fault zones, geophysical anomalies, and volcanic-sedimentary contacts within the Blake River Group, a highly prospective assemblage known to host both gold and polymetallic massive-sulphide deposits.

With exploration permits now in place, KLDC is positioned to advance a strong pipeline of drill-ready targets at KL South, KL West and KL East, supported by multiple anomalous soil trends, historical mineral showings, and structurally controlled intersections.