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Skyharbour Intersects High-Grade Uranium in Significant 42 m Step Out Hole ML24-15 which Returned 4.74% U3O8 over 1.5 m within 6.4 m of 1.50% U3O8 at Moore Project

Drill Results

Suite 1030 – 505 Burrard Street, Vancouver, BC, Canada, V7X1M5

www.skyharbourltd.com

TSX-V Trading Symbol: SYH

Email: [email protected]

Telephone: (604) 687-3376

Facsimile: (604) 687-3119

June 10th, 2025

NEWS RELEASE

Skyharbour Intersects High-Grade Uranium in Significant 42 m Step Out Hole ML24-15

which Returned 4.74% U3O8 over 1.5 m within 6.4 m of 1.50% U3O8 at Moore Project

Vancouver, BC - Skyharbour Resources Ltd. (TSX-V: SYH) (OTCQX: SYHBF) (Frankfurt:

SC1P) (the “Company”) is pleased to announce the remaining assay results from its late 2024

diamond drilling program at its 100% owned, 35,705 hectare Moore Uranium Project, which

totaled 2,759 metres in nine holes. The project is located approximately 15 kilometres east of

Denison Mine’s Wheeler River project and proximal to regional infrastructure for Cameco’s Key

Lake and McArthur River operations in the Athabasca Basin, Saskatchewan. A highlight from this

program was from hole ML24-15, which intersected 6.4 metres of 1.50% U3O8 from a relatively

shallow downhole depth of 275.0 metres to 281.4 metres, including 4.74% U3O8 over 1.5 metres.

Hole ML24-15 was drilled well outside the known footprint of the high-grade Maverick East Zone,

extending its high-grade core approximately 42 metres to the northeast representing one of the

most consequential expansion drill holes at the Project. Skyharbour plans to continue advancing

Moore through additional drilling this summer , alongside the fully-funded multi-phased drill

programs at the Company’s adjacent Russell Lake Uranium Project.

Moore Uranium Project Claims Map:

https://skyharbourltd.com/_resources/images/Sky_MooreLake.jpg?v=1

Jordan Trimble, President and CEO of Skyharbour Resources, stated: “Drill hole ML24 -15

represents a significant development at the Moore Project as it extends the high-grade Maverick

East Zone over 40 metres to the northeast. The drill result demonstrates the high-grade, shallow

nature of uranium mineralization and opens up the area to additional drilling and potential

resource expansion. We are preparing for another phase of low-cost drilling this summer at Moore

to further delineate the numerous high-grade zones of uranium on the Maverick Corridor, and we

also plan to test prospective regional targets t hat have had limited drill -testing historically.

Furthermore, our ongoing drilling is progressing very well at our co-flagship and adjacent Russell

Lake project with additional news forthcoming from both projects.”

Highlights:

• Hole ML24-15 intersected 6.4 metres of 1.50% U3O8 from a relatively shallow downhole

depth of 275.0 metres to 281.4 metres, including 4.74% U3O8 over 1.5 metres.

• Notably, the hole was drilled well outside the known footprint of the Maverick East Zone,

extending its high-grade core approximately 42 metres to the northeast. This illustrates

the strong expansion potential at the high-grade zones.

• Preparation is underway for a fully-funded 4,500 – 5,000 metre summer drill program at

Moore focused at Main Maverick and Maverick East Zones as well as high-priority

regional targets.

• Ongoing first phase of drilling consisting of a minimum of 5,000 metres at the Russell

Lake Project, focusing on the newly discovered Fork Zone, which has high-grade

uranium mineralization hosted at the unconformity, as well as testing other newly

identified high-priority targets at the Fox Lake Trail and Sphinx targets.

• In total, the company is planning to drill between 16,000 – 18,000 metres across the

Russell and Moore projects this year and is fully funded and permitted to do so.

Summary of 2024 Drilling Campaign at Moore:

The phase of drilling on the Moore Project later in 2024 totalled 2,759 metres in nine holes. Of

the nine holes, four holes (ML24-10 to -12 and ML24-18) focused on the Main Maverick Zone and

five holes (ML24-13 to -17) on the Maverick East Zone. The primary objective of the summer

program was to extend and expand the boundaries of the Main Maverick and Maverick East

Zones with all but one hole successfully intersecting uranium mineralization . Drill hole ML24-15

which intersected 6.4 m of 1. 50% U3O8 successfully expands the Maverick East zone over 40

metres along strike to the northeast with more drilling warranted in the area.

Moore Uranium Project Regional Grid Targets Map:

http://skyharbourltd.com/_resources/maps/Moore-Lake-Property-Wide.jpg

Four exploration holes totalling 1,195 metres were drilled in and around the Main Maverick Zone

to expand the shallow high-grade mineralized zone. All of these holes were drilled vertically and

intersected significant uranium mineralization at the unconformity, centred around 265 metres to

275 metres downhole depth. The majority of the high -grade uranium mineralization at the Main

Maverick Zone is sandstone -hosted, situated at or just above the unconformity. Hole ML24-11

intersected 0.76% U3O8 over 1.0 m starting at 268.0 m depth, including 1.09% U3O8 over 0.5 m,

and 0.40% U3O8 over 0.5 m at 285.0 m. Hole ML24-12 intersected 0.21% U3O8 over 1.0 m starting

at 268.0 m depth. Hole ML24-18 intersected 0.10% U3O8 over 5.5 m starting at 271.0 m.

Main Maverick Zone Drilling Map:

https://www.skyharbourltd.com/_resources/news/Maverick_Main_2024.jpg

An additional five exploration holes, totalling 1,564 metres, were drilled in and around the

Maverick East Zone to connect mineralization with Main Maverick and to expand mineralization

east along strike. Four of these holes were drilled vertically, and one oriented hole was drilled to

obtain structural measurements. Much like at Main Maverick , mineralization is concentrated

directly above the unconformity, between 260 metres and 285 metres. Hole ML24-13 intersected

0.14% U3O8 over 6.4 m starting at 268.5 m, including 0. 63% U3O8 over 1.0 m at 269.0 m ,

and 0.30% U3O8 over 1.0 m at 273.9 m. Hole ML24-14 intersected 0.04% U3O8 over 1.0 m starting

at 287.2 m. Hole ML24-15 intersected 1.50% U3O8 over 6.4 m starting at 275.0 m depth, including

4.74% U3O8 over 1.5 m. Hole ML24-16 intersected 0.10% U 3O8 over 0.5 m starting at 314.0 m.

Hole ML24-17 intersected 0.16% U3O8 over 3.0 m starting at 274.0 m depth.

Maverick East Zone Drilling Map:

https://www.skyharbourltd.com/_resources/news/Maverick_East_2024.jpg

In addition to the assay results reported here, previously reported drill results from the first phase

of drilling earlier in 2024 included notable high -grade intercepts at Moore . Highlight drill hole

ML24-08 intersected 5.0 metres of 4.61% U 3O8 between 265.5 metres and 270.5 metres depth

including 3.0 metres of 7.30% U 3O8 between 266.0 metres to 269.0 metres depth at the Main

Maverick Zone . Another notable hole was ML 24 -03, which intersected a broad interval of

mineralization grading 1.11% U 3O8 over 11.5 metres between 266.8 metres to 278.3 metres

depth, including 5.87% U3O8 over 2.0 metres (see news release dated July 11th, 2024).

2025 Summer and Fall Drilling Plans:

Skyharbour is planning for an additional, fully-funded 4,500 – 5,000 metres of drilling at the Main

Maverick and Maverick East Zones to further expand, characterize and define the extents of the

mineralized zones. Both of these high-grade zones are open along strike and at depth, with little

historical drilling testing the underlying basement rocks. Furthermore, Skyharbour plans to test

regional targets at Moore that have been further refined with modern geophysics and new

geological modelling. This drilling will take place in conjunction with the multi -phased drilling

campaign this year at the adjacent Russell Lake Project. Both drilling programs will be run using

the Compan y’s McGowan Lake camp on Highway 914 as a base of operations, making

exploration at both properties very cost-effective. In total, the company plans to drill 16,000 -

18,000 metres in 35 - 45 drill holes across the projects in 2025.

Moore Uranium Project Overview:

In June 2016, Skyharbour secured an option to acquire Denison Mine's Moore Uranium Project,

on the southeastern side of the Athabasca Basin, in northern Saskatchewan and has since fulfilled

its earn-in. The project consists of 12 contiguous claims totaling 35,705 hectares located 42

kilometres northeast of the Key Lake mill, approx. 15 kilometres east of Denison’s Wheeler River

project, and 39 kilometres south of Cameco’s McArthur River uranium mine. Unconformity-hosted

uranium mineralization was discovered on the Moore Project at the Maverick Zone with historical

drill highlights consisting of 4.03% eU3O8 over 10 metres, including 20% eU3O8 over 1.4 metres,

in ML-161. In 2017, Skyharbour announced drill results of 6.0% U 3O8 over 5.9 metres, including

20.8% U3O8 over 1.5 metres at a vertical depth of 265 metres, in hole ML-199. In addition to the

Main and East Maverick Zones, the project hosts other mineralized targets with strong discovery

potential which the Company plans to test with future drill programs. The project is fully accessible

via winter and ice roads which simplifies logistics and lowers costs. Large proportion s of the

property are accessible in the summer as well.

Moore Lake Uranium Project Geophysics Map:

http://skyharbourltd.com/_resources/maps/MooreLake-Basic-geo-revamp.jpg

Qualified Person:

The technical information in this news release has been prepared in accordance with the

Canadian regulatory requirements set out in National Instrument 43 -101 and reviewed and

approved by Serdar Donmez, P.Geo., VP of Exploration for Skyharbour, as well as a Qualified

Person.

About Skyharbour Resources Ltd.:

Skyharbour holds an extensive portfolio of uranium exploration projects in Canada's Athabasca

Basin and is well positioned to benefit from improving uranium market fundamentals with interest

in thirty-six projects covering over 614,000 hectares (over 1.5 million acres) of land. Skyharbour

has acquired from Denison Mines, a large strategic shareholder of the Company, a 100% interest

in the Moore Uranium Project , which is located 15 kilometres east of Denison's Wheeler River

project and 39 kilometres south of Cameco's McArthur River uranium mine. Moore is an

advanced-stage uranium exploration property with high -grade uranium mineralization in several

zones at the Maverick Corridor. Adja cent to the Moore Project is the Russell Lake Uranium

Project, in which Skyharbour is operator with joint -venture partner RTEC. The project hosts

widespread uranium mineralization in drill intercepts over a large property area with exploration

upside potential. The Company is actively advancing these projects through exploration and

drilling programs.

Skyharbour also has joint ventures with industry leader Orano Canada Inc., Azincourt Energy,

and Thunderbird Resources at the Preston, East Preston, and Hook Lake Projects, respectively.

The Company also has several active earn-in option partners, including CSE-listed Basin Uranium

Corp. at the Mann Lake Uranium Project; TSX-V listed North Shore Uranium at the Falcon Project;

UraEx Resources at the South Dufferin and Bolt Projects; Hatchet Uranium at the Highway

Project; CSE-listed Mustang Energy at the 914W Project; and TSX-V listed Terra Clean Energy

at the South Falcon East Project . In aggregate, Skyharbour has now signed earn -in option

agreements with partners that total to over $36 million in partner-funded exploration expenditures,

over $20 million worth of shares being issued, and $ 14 million in cash payments coming into

Skyharbour, assuming that these partner companies complete their entire earn -ins at the

respective projects.

Skyharbour's goal is to maximize shareholder value through new mineral discoveries, committed

long-term partnerships, and the advancement of exploration projects in geopolitically favourable

jurisdictions.

Skyharbour’s Uranium Project Map in the Athabasca Basin:

https://www.skyharbourltd.com/_resources/images/SKY_SaskProject_Locator_2024-11-

21_v1.jpg

To find out more about Skyharbour Resources Ltd. (TSX -V: SYH) visit the Company’s website

at www.skyharbourltd.com.

SKYHARBOUR RESOURCES LTD.

“Jordan Trimble”

Jordan Trimble

President and CEO

For further information contact myself or:

Nicholas Coltura

Investor Relations Manager

Skyharbour Resources Ltd.

Telephone: 604-558-5847

Toll Free: 800-567-8181

Facsimile: 604-687-3119

Email: [email protected]

NEITHER THE TSX VENTURE EXCHANGE NOR ITS REGULATION SERVICES PROVIDER

ACCEPTS RESPONSIBILITY FOR THE ADEQUACY OR ACCURACY OF THE CONTENT OF

THIS NEWS RELEASE.

The securities offered have not been, and will not be, registered under the United States

Securities Act of 1933, as amended (the "U.S. Securities Act") or any U.S. state securities laws,

and may not be offered or sold in the United States or to, or for th e account or benefit of, United

States persons absent registration or an applicable exemption from the registration requirements

of the U.S. Securities Act and applicable U.S. state securities laws. This press release does not

constitute an offer to sell o r the solicitation of an offer to buy securities in the United States, nor

in any other jurisdiction.

This release includes certain statements that may be deemed to be "forward-looking statements".

All statements in this release, other than statements of historical facts, that address events or

developments that management of the Company expects, are forwa rd-looking statements,

including the Private Placement. Although management believes the expectations expressed in

such forward-looking statements are based on reasonable assumptions, such statements are not

guarantees of future performance, and actual results or developments may differ materially from

those in the forward-looking statements. The Company undertakes no obligation to update these

forward-looking statements if management's beliefs, estimates or opinions, or other factors,

should change. Factors that could cause actual results to differ materially from those in forward-

looking statements, include market prices, exploration and development successes, regulatory

approvals, continued availability of capital and financing, and general economic, market or

business conditions. Please see the public filings of the Company at www.sedar.com for further

information.