Stuhini Announces Strategic Refocus on Ruby Creek Amid Growing Demand for Precious and Critical Metals

Stuhini Announces Strategic Refocus on Ruby

Creek Amid Growing Demand for Precious and

Critical Metals

VANCOUVER, BC

,

June 23, 2025

/CNW/ - Stuhini Exploration Ltd. ("Stuhini" or the "Company")

(TSXV: STU) (OTCQB: STXPF) is pleased to announce a renewed and sharpened focus on its

wholly-owned flagship Ruby Creek Project ("Ruby Creek" or the "Project"), located near

Atlin, British

Columbia

, following a comprehensive strategic review of its project portfolio.

Meredith Eades

, President and CEO of Stuhini, commented: "As global demand for precious and

critical minerals continues to grow, driven by macroeconomic uncertainty, industrial growth, and

supply concerns, we believe Ruby Creek is uniquely positioned with its combination of scale, access,

and diverse metal mix. Our focus is to unlock that value through methodical, data-driven work that

prioritizes the strongest targets. With this year's program, we're laying the technical groundwork for

what we believe could become a meaningful multi-zone drill campaign in 2026."

Key Highlights of the Ruby Creek Project

Significant land package:

~29,734 hectares with seven distinct mineralized zones.

Polymetallic potential:

Gold, silver, molybdenum, and tungsten across multiple mineralization

styles.

Atlin

gold:

Atlin

is recognized as a significant placer gold producing district. Suhini's mineral

tenures underlay 6 of the 9 main placer gold producing creeks.

Established surface mineralization:

148 rock samples over 1.0 g/t gold and 286 rock

samples over 100 g/t silver across a 15 km corridor.

Current updated (2022) 43-101 Molybdenum Resource:

Includes multiple intervals grading

over 1% Mo.

Tungsten upside:

Past producing Black Diamond Tungsten Mine located on Stuhini tenures

along with multiple other early-stage tungsten targets.

Underexplored targets:

Multiple zones remain open at depth and along key structures.

Excellent infrastructure:

Road-accessible, ~15 km from

Atlin, B.C.

, with extensive historical

data.

Map: Gold & Silver Showings (CNW Group/Stuhini Exploration Ltd.)

Figure 1:

Ruby Creek Gold

& Silver Rock Sample Highlights.

Surface rock sampling across the property has returned gold assays up to

121.34 g/t Au

and

14,179 g/t Ag

with multiple clusters of high-grade samples distributed across several target zones.

Precious Metals Potential

Ruby Creek is host to a series of gold-bearing quartz veins across several structural zones, with

rock sampling returning grades up to

121.34 g/t gold

, while silver mineralization is widespread, with

assays up to

14,179 g/t silver

. These zones demonstrate strong near-surface potential and are

supported by historical geochemical trends and structural continuity, yet many remain for the most

part untested by modern exploration techniques.

Figure 2 (CNW Group/Stuhini Exploration Ltd.)

Right: High-Grade Gold Sample (Boulder Creek Area):

Quartz vein with visible sulfides collected

in the Boulder Creek area. Originally reported in Stuhini's

May 5, 2021

press release

, assaying

121.34 g/t gold.

Left: High-Grade Silver Sample (Silver Surprise):

Massive sulfide-bearing quartz

vein from Silver Surprise. As reported in Stuhini's

April 6, 2021

press release

, sampling returned

assays up to 14,179 g/t silver.

Base Metals & Critical Minerals

Ruby Creek hosts a

porphyry-style molybdenum deposit

, with a pit-constrained measured and

indicated resource (

March 2022

) of

432.99 million lbs Mo

within

369.4 million tonnes grading

0.053% Mo

(0.020% cutoff), and an inferred resource of

43.65 million lbs Mo

within

41.95 million

tonnes grading 0.047% Mo

. Drilling includes multiple high-grade intervals exceeding 1% Mo, up to

3.8%. Early-stage tungsten mineralization has also been identified, providing additional exposure to a

metal increasingly recognized as critical for industrial, defense, and energy applications.

Figure 3 (CNW Group/Stuhini Exploration Ltd.)

Right: Molybdenum Mineralization:

Example of molybdenite typical of the Ruby Creek porphyry-

style molybdenum deposit. Drilling has defined a large pit-constrained resource, as disclosed in

Stuhini's

March 2022

Technical Report

.

Left: Tungsten Mineralization:

Massive wolframite vein

intersected during drilling conducted in 2017, prior to Stuhini's involvement. These tungsten

occurrences highlight emerging critical mineral potential on the property.

Technical Review and 2025 Exploration Plans

Stuhini has completed a full review of historical exploration at Ruby Creek, incorporating rock and

soil geochemistry, geophysical surveys, and drill data. This comprehensive data integration has

allowed the team to reprocess legacy geophysical datasets, rank existing targets based on

geological merit, structural controls, and accessibility, reexamine and identify multiple zones with high

discovery potential that have seen limited modern exploration to date.

Building on this foundation, Stuhini's 2025 program will focus on:

Geological mapping and geochemical sampling across high-priority target zones

Ground-based geophysics, including ground magnetics and VLF surveys

Channel sampling and trenching to refine structural models and prioritize drill targets

Building Toward Discovery

With scale, mineral diversity, historical data, and multiple open targets, Ruby Creek represents a

rare opportunity for significant value creation. The 2025 program is designed to systematically

advance multiple zones toward drill readiness, with the objective of initiating a multi-zone drill

campaign in 2026.

Ruby Creek offers exposure to a diverse suite of highly sought-after commodities, including gold,

silver, molybdenum, and tungsten — all within a large-scale, road-accessible project in a proven

mining jurisdiction. As part of this strategic refocus, Stuhini has relinquished its non-core

Red Hills

and Jersey Valley projects in

Nevada

, allowing exploration capital and technical efforts to be fully

concentrated on advancing Ruby Creek.

Qualified Person

Mr.

Nicholas Clive Aspinall

, M.Sc., P.Eng., is a consulting geologist to Stuhini Exploration and is a

"qualified person" as defined by National Instrument 43-101. Mr. Aspinall has verified the data

disclosed in this press release, including the sampling, analytical and test data underlying the

technical information, and has approved the technical information contained herein.

About Stuhini Exploration Ltd.

Stuhini is a mineral exploration company focused on exploration and development of precious and

base metals properties in western

Canada

and the southwest

United States

. The Company's

portfolio of exploration properties includes the flagship Ruby Creek Property, 16 km east of

Atlin,

BC

; the South Thompson Nickel Project, 35 km northwest of

Grand Rapids, Manitoba

; the Big

Ledge Property, 57 km south of

Revelstoke, BC

For further information on Stuhini, visit our website at

www.stuhini.com

Twitter:

@

STUexploration

LinkedIn:

Stuhini Exploration

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.

SOURCE

Stuhini Exploration Ltd.

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For further information:

Meredith Eades, President & CEO, [email protected], 604.360.4668

CO: Stuhini Exploration Ltd.

CNW 08:30e 23-JUN-25