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Kirkland Lake Discoveries Intersects 1.22 g/t Au over 69.5 m at New "Mirado West" Zone, Doubling Gold Footprint to over 1,300 m

Drill Results

Kirkland Lake Discoveries Intersects 1.22 g/t

Au over 69.5 m at New "Mirado West" Zone,

Doubling Gold Footprint to over 1,300 m

Toronto, Ontario--(Newsfile Corp. - September 2, 2026) - Kirkland Lake Discoveries Corp. (TSXV:

KLDC) (OTCQB: KLKLF) ("KLDC" or the "Company") is pleased to report the first two holes from the

regional testing around the Mirado deposit. MZ target holes KLM26-035 and KLM26-037 successfully

intersected multiple broad intervals of gold mineralization and high-grade gold. Mineralization and

alteration of these holes are consistent with the Mirado South Zone and are interpreted to be contiguous

with the historical deposit.

As such, the Company has renamed the MZ Zone to Mirado West. These

holes are part of the ongoing summer 2026 drill program at KL South Project, 18 km south of Kirkland

Lake, with 19 additional holes pending.

Highlights

KLM26-037 - 1.22 g/t Au over 69.50 m from 33.00 m including 5.67 g/t Au over 12.00 m

KLM26-035 - 0.35 g/t Au over 21.18 m from 19.50 m

and 0.65 g/t Au over 15.83 m from 65.20 m

and 0.34 g/t Au over 11.23 m from 95.50 m

and 36.72 g/t Au over 1.01 m from 174.50 m

and 0.89 g/t Au over 11.60 m from 222.40 m

Mineralization and alteration are consistent with the Mirado deposit, extending mineralization more

than 600 m west and bringing the lateral mineralized footprint to over 1,300 m.

19 holes pending results

Nine

from Mirado North and South

Four

from Mirado West

Six

regional targets

"The discovery at Mirado West is a transformative milestone for Kirkland Lake Discoveries. Intercepting

broad, near-surface mineralization validates our regional targeting and significantly scales up the

project," stated Stefan Sklepowicz, Chief Executive Officer.

"By extending our mineralized footprint to

over 1,300 metres, we are demonstrating that Mirado is part of a much larger, contiguous gold system.

With 19 holes still pending, including four more from this newly renamed Mirado West, we are eagerly

anticipating the rest of the summer program's results."

"Today we've essentially doubled the east-west extent of the Mirado deposit, with perhaps the best hole

we've drilled to date in and around Mirado," said Denis Laviolette, Executive Chairman. "This will have

large implications in the future when we look to incorporate new drilling into a future resource update

using both new expansion drilling and modern metals pricing and cutoff sensitivities."

Drill Program Discussion

Assay results from drill holes KLM26-035 and KLM26-037 represent a significant development in

KLDC's geological understanding of the Mirado project. The current release includes two key holes

targeting the newly renamed

Mirado West

(formerly the MZ target), located to the west of the main

Mirado deposit (see Figures 1 and 2).

Figure 1

- Plan map of the Mirado deposit showing 2026 drilling, gold assay composites, historical

surface sampling and the historical mineralized footprint.

To view an enhanced version of this graphic, please visit:

https://images.newsfilecorp.com/files/5701/312542_8e937b47649489e3_001full.jpg

Figure 2

- Simplified long-section and cross-section views of drilling at Mirado. The historical

mineralized shell is shown in orange, with current release drill holes highlighted in green and drill assay

composites coloured by gold grade.

To view an enhanced version of this graphic, please visit:

https://images.newsfilecorp.com/files/5701/312542_8e937b47649489e3_002full.jpg

In Mirado West, hole

KLM26-037

successfully intersected a broad, near-surface zone of mineralization,

returning

1.22 g/t Au over 69.50 m

starting from 33.00 m. This broad intercept includes a strong high-

grade core of

5.67 g/t Au over 12.00 m

. Hole

KLM26-035

, drilled from the same pad in the opposite

direction, intersected multiple horizons of gold mineralization starting near surface and continuing at

depth, showcasing the wide, continuous nature of the mineralized envelope in this new area. Notable

intervals in KLM26-035 include

0.35 g/t Au over 21.18 m

from 19.50 m,

0.65 g/t Au over 15.83 m

from

65.17 m, and a deeper high-grade intercept of

36.72 g/t Au over 1.01 m

from 174.49 m,

see Table 1

and Figure 3

.

These intercepts demonstrate that the mineralization and alteration styles observed at Mirado West are

consistent with those of the Mirado South Zone and are interpreted to be part of a contiguous system.

This successful step-out effectively extends the known mineralization more than 600 m to the west,

immediately expanding the lateral mineralized footprint of the Mirado system to over 1,300 m wide.

Exploration momentum continues at the KL South Project. The Company is currently awaiting assay

results from 19 additional holes from the ongoing summer 2026 drill program. These pending holes

include:

Nine holes from Mirado North and South

Four holes from Mirado West

Six holes from regional targets

Table 1 -

Mirado West Drill Results

Drill Hole

From (m)

To (m)

Interval (m)

Au (g/t)

Zone

KLM26-035

19.50

40.68

21.18

0.35

Mirado West

and

55.50

57.00

1.50

0.40

Mirado West

and

65.17

81.00

15.83

0.65

Mirado West

and

95.50

106.73

11.23

0.34

Mirado West

and

116.50

121.50

5.00

0.23

Mirado West

and

124.50

126.00

1.50

0.27

Mirado West

and

161.00

165.00

4.00

0.35

Mirado West

and

174.49

175.50

1.01

36.72

Mirado West

and

194.44

195.50

1.06

0.76

Mirado West

and

222.40

234.00

11.60

0.89

Mirado West

including

225.82

228.12

2.30

3.70

Mirado West

KLM26-037

33.00

102.50

69.50

1.22

Mirado West

including

41.00

53.00

12.00

5.67

Mirado West

and

127.00

134.00

7.00

0.23

Mirado West

and

277.00

278.00

1.00

0.56

Mirado West

Figure 3

- Au assays from KLM26-035 & KLM26-037.

Mineralized halo highlighted where Au

mineralization is above 0.1 g/t and < 7 m gap.

To view an enhanced version of this graphic, please visit:

https://images.newsfilecorp.com/files/5701/312542_8e937b47649489e3_003full.jpg

Digital Resources

Stakeholders can explore KLDC's drilling through a publicly accessible

interactive 3D model

hosted by

Mining Hub, which illustrates drill-hole data, mineralized intervals and interpreted target areas. The

latest

episode

of

KLDC's Treasure Hunters

video series also provides an on-site update on drilling and

exploration progress. VP Exploration Ben Cleland and the geological team discuss the latest results and

the ongoing Mirado drill program.

Cannot view this video?

Visit:

https://www.youtube.com/watch?v=XYARDH2TwK4

Data Verification & Quality Assurance/Quality Control (QA/QC)

Gold analyses were completed on half-core NQ samples at Paragon Geochemical Laboratory

(independent of KLDC) using Chrysos PhotonAssay technology. PhotonAssay is a non-destructive

method that uses high-energy X-rays to measure gold in large approximately 500 g samples, reducing

sampling variability associated with coarse gold mineralization and allowing the retained material to

remain available for additional analysis.

Table 2

- Paragon Sample Preparation and Analytical Methods

Analysis

Code

Location

Preparation

PREP-PKG

Timmins, Ontario, Canada

Photon and Fire Assay

PA-AU01, Au-SCR1K

Surrey, British Columbia | Hamilton, Ontario, Canada

Multi-Element

33MA-OES

Sparks, Nevada, USA

Samples returning gold values above the 350 g/t upper detection limit of the PhotonAssay method are

reanalyzed using a 1 kg screen fire assay. The sample is sieved at 110 microns, the coarse fraction is

analyzed gravimetrically, and the fine fraction is analyzed in duplicate by AAS; the combined result

provides a representative total gold value for samples that may contain coarse gold.

Drill program design, QA/QC and interpretation of results are conducted by qualified persons consistent

with National Instrument 43-101 and industry best practices. Certified reference standards and blanks

are inserted into the sample stream at regular intervals, approximately one control sample per twenty

samples, to monitor analytical accuracy and precision.

Reported intervals are calculated using length-weighted average grades with a nominal 0.2 g/t Au cutoff.

To reflect continuity within the broader mineralized system, up to 6.9 m of consecutive internal dilution

below cutoff is included within selected composites. Reported assays are uncut and no top cut has been

applied. All intervals are reported as downhole core lengths. True widths at Mirado are estimated at

approximately 80% of reported core lengths.

Qualified Person

The technical information contained in this news release has been reviewed and approved by

Benjamin

Cleland, P.Geo., Vice-President Exploration

, who is a Qualified Person as defined by National

Instrument 43-101 - Standards of Disclosure for Mineral Projects.

About Kirkland Lake Discoveries Corp.

Kirkland Lake Discoveries Corp. (TSXV: KLDC) (OTCQB: KLKLF) has assembled a 420 km

2

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 in place, KLDC is positioned to advance a pipeline of drill-ready targets at KL

South, KL West and KL East, supported by anomalous soil trends, historical mineral showings and

structurally controlled intersections.

For additional information, please contact:

Stefan Sklepowicz

Chief Executive Officer

Phone:

+1 226-979-3515

Email:

[email protected]

Website:

www.kirklandlakediscoveries.com

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in policies

of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Forward-Looking Statements

This news release contains "forward-looking statements" within the meaning of applicable securities

legislation. All statements, other than statements of historical fact, are forward-looking statements.

Forward-looking statements in this news release include, but are not limited to, statements concerning

updating the Mirado 3D model, interpretation of mineralized continuity and geometry, selection of follow-

up drill targets and future exploration at Mirado. Generally, forward-looking statements can be identified

by terminology such as "plans", "expects", "is expected", "estimates", "intends", "anticipates",

"believes", "may", "could", "would", "might" or "will".

Forward-looking statements are subject to known and unknown risks, uncertainties and other factors that

may cause actual results, performance or achievements to differ materially from those expressed or

implied, including the results and interpretation of exploration and drilling activities, the reliability of

historical data, commodity prices and general economic, market or business conditions. There can be

no assurance that forward-looking statements will prove accurate, as actual results and future events

could differ materially from those anticipated. Readers should not place undue reliance on forward-

looking statements. The Company does not undertake to update such statements except in accordance

with applicable securities laws.

Additional information is available under the Company's profile on

SEDAR+

.

Table 3

- Mirado Drill-Hole Collars and Assay Coverage

Drill Hole

Easting

Northing

Azimuth (deg)

Inclination (deg)

Final Length (m)

Target

Assay Status

KLM26-035

586635

5318381

60

-50

360

Mirado West

Results reported

KLM26-037

586635

5318381

240

-50

354

Mirado West

Results reported

To view the source version of this press release, please visit

https://www.newsfilecorp.com/release/312542