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Metalero Mining (TSXV: MLO) Initiates a Fall Exploration Program, Adds to the Benson Land Package and Continues Dialogue with the Lhtako First Nation

Mergers & Acquisitions Property Options & Staking Exploration Programs

Metalero Mining (TSXV: MLO) Initiates a Fall Exploration Program, Adds to the Benson

Land Package and Continues Dialogue with the Lhtako First Nation

Edmonton, AB, December 3, 2025 – Metalero Mining Corp. (TSXV: MLO) (“Metalero” or the

“Company”) is pleased to announce that field crews have mobilized to the Benson Project

which was recently expanded to 173 km2 through the staking of an additional mineral claim

(Figure 1). This fall program will complete coverage over the Cantin target while establishing

some soil sampling over the Sundberg and Chiaz targets in the south of the Property. MLO’s

flagship Benson Project is located in the prolific Quesnel Trough of central British Columbia.

Rob L’Heureux, President & CEO of Metalero Mining , commented “We recently staked

another 7 km 2 at the Cantin occurrence wher e recently reported copper and gold soil

anomalies run up to our claim boundaries and are open in several directions. This new

ground covers an area with a strong geophysical signature similar to our other targets at

Benson. The newly initiated field program will follow-up promising soil results at Cantin and

conduct a first pass of modern sampl ing techniques at Sundberg and Chiaz , which have

seen very little systematic exploration historically.”

Mr. L’Heureux further stated “We are committed to continuing our constructive dialogue

and cooperation with the Lhtako Dene Nation. As we progress through the new Mineral Claim

Consultation Framework (MCCF) and await approval of our claim, Metalero is dedicated to

building a solid, meaningful relationship with the Nation.”

The spring 2025 soil sampling program covered parts of the underexplored Cantin area which

contains two targets identified by recent Geoscience BC Artificial-Intelligence (AI) work. This

AI work was part of the QUEST (Quesnelia Exploration Strategy) program designed to identify

copper-gold porphyry targets within the Quesnel Trough. Metalero’s initial sampling program

generated copper and gold anomalies covering an area >8 km 2 which overlie and surround

the QUEST targets.

Chiaz and Sundberg are also based on the QUEST AI work and include targets measuring 3.5

and 5 kilometres in length, respectively. Chiaz has no historical work and represents a

compelling blind target while the Sundberg area has yielded high-grade copper and gold soil

anomalies historically with no follow-up.

Figure 1. Map of the Cantin area showing open copper anomalies, QUEST targets, and the recently

acquired mineral claim covering a continuation of coincident soil and geophysical anomalies.

Benson Project Background

Metalero has signed a binding Letter of Intent (“LOI”) to acquire 100% of the Benson Project

which is strategically located in the Quesnel Trough, one of Canada’s most important

mineral belts. The Quesnel Trough is a Triassic/Jurassic-age belt of volcano-sedimentary and

intrusive rocks which hosts >360 alkalic copper-gold porphyry occurrences and deposits. At

>1,500 km long, the Quesnel Trough runs through the middle of BC stretching from the US to

the Yukon Territory. It hosts numerous major mines which produce copper and gold as well

as variable amounts of silver and molybdenum while also hosting sever al types of gold

deposits.

High profile and long-lived mines in the Quesnel Trough include Highland Valley, Mt Milligan,

New Afton and Kemess which are complemented by recent exploration work including

Woodjam, MPD, Kwanika, and the extensive staking by Australian mining giant, the

Fortescue Group.

Th e B e n s o n P r o je c t l ie s c l o s e t o i n f r a s tr uc tur e a n d is tr a v e r s e d b y H igh w a y 26 a n d a vast

network of logging roads allowing for ready access to all parts of the Property and capital -

efficient exploration. The large land package covers 5 different target areas i lluminated by

recent Artificial-Intelligence (“AI”) work by Geoscience BC (Mitchinson et al., Geoscience

BC Report 2022-07). This AI study incorporated a wide variety of historical datasets including

geophysics, geology, sampling information, and drilling data (where present) to identify high

potential (“porphyry -like”) anomalies with similarities to known porphyry deposits

elsewhere in the belt. Even the l imited historical exploration at Benson has identified

numerous gold and copper surface geochemical anomalies while modest , historical drill

programs have intersected skarn and epithermal gold and silver mineralization, which are

both intrusive-related styles of mineralization and are commonly associated with porphyry

systems.

About Metalero Mining Corp.

Metalero Mining Corp. is a Canadian-based junior exploration company focused on copper

and gold projects in North America. Its 1 73 square kilomet re, road-accessible Benson

Project serves as Metalero’s flagship and is host to five prospects containing gold and copper

within porphyry-related mineralized systems.

Qualified Person The technical content of this news release pertaining to the Benson

Project was reviewed and approved by Michael Dufresne , M.Sc, P .Geol., P .Geo., a non-

independent qualified person as defined by National Instrument 43-101.

On behalf of the Board of Directors

“Rob L’Heureux” Rob L’Heureux, Chief Executive Officer and President

Email: [email protected] Telephone: +1.780.916.5482

www.metalsgroup.com

Metalero is part of the Metals Group of Companies, managed by

exploration professionals who stand for technical excellence, robust

project selection and strong corporate governance, with a proven ability

to identify and capitalize on investment opportuniti es and deliver

shareholder returns.

NEITHER TSX VENTURE EXCHANGE NOR ITS REGULATION SERVICES PROVIDER (AS THAT TERM IS DEFINED

IN THE POLICIES OF THE TSX VENTURE EXCHANGE) ACCEPTS RESPONSIBILITY FOR THE ADEQUACY OR

ACCURACY OF THIS RELEASE.

Forward-Looking Statements This news release may contain certain “forward looking statements” or

“forward-looking information” within the meaning of applicable securities laws including, without limitation,

the timing, nature, scope and details regarding the Company's exploration plans and results. Such statements

and information involve known and unknown risks, uncertainties and other factors that may cause the actual

results, performance or achievements of the Company, its projects, or industry results, t o be materially

different from any future results, performance or achievements expressed or implied by such forward-looking

statements or information. Such statements can be identified by the use of words such as "may" , "would" ,

"could" , "will" , "intend" , "expect" , "believe" , "plan" , "anticipate" , "estimate" , "scheduled" , "forecast" , "predict"

and other similar terminology, or state that certain actions, events or results "may" , "could" , "would" , "might" or

"will" be taken, occur or be achieved. These statements reflect the company's current expectations regarding

future events, performance and results and speak only as of the date of this release.

Forward-looking statements in this press release are subject to a variety of risks and uncertainties and other

factors that could cause actual events or results to differ materially from those projected in the forward-looking

statements. These include, but are not limited to , risks associated with the mining industry in general, the

exploration and development of mineral properties, the Company's ability to obtain necessary financing, and

general economic, market or business conditions. There can be no assurance that such information will prove

to be accurate, as actual results and future events could differ materially from those anticipated in such

information. Accordingly, readers should not place undue reliance on forward-looking information. All forward

looking information contained in this press release is given as of the date hereof and is based upon the opinions

and estimates of management and information available to management as at the date hereof. Other factors

which could materially affect such fo rward-looking information are described in the risk factors in the

Company’s most recent annual management’s discussion and analysis which is available on the Company’s

profile on SEDAR+ at www.sedarplus.ca. Metalero disclaims any intention or obligation to update or revise any

forward-looking information, whether as a result of new information, future events or otherwise, except as

required by law.