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Bunker Hill Ships First Concentrate to Trail Smelter and Announces Drawdown of Standby Facility KELLOGG, Idaho and VANCOUVER, British Columbia

Corporate Updates

Bunker Hill Ships First Concentrate to Trail Smelter and Announces Drawdown

of Standby Facility

KELLOGG, Idaho and VANCOUVER, British Columbia, July 31, 2026 -- Bunker Hill Mining Corp. (“ Bunker Hill ” or the

“Company”) (TSX:BNKR | OTCQB:BHLL ) is pleased to announce the first shipment of concentrate to Teck Resources

Limited’s (“Teck”) Trail Smelter.

“With the successful commissioning of our new 1,800 ton per day (“ tpd”) processing plant, the Bunker Hill team is proud to

have begun generating revenue from the sale of concentrate for the first time since the Bunker Hill Mine ceased operations

more than 45 years ago," said Sam Ash, President and Chief Executive Officer of Bunker Hill. "This represents a defining

milestone in the Company's redevelopment and validates the dedication of our team in safely bringing one of America's most

historic mining operations back into production. While we continue to optimize plant performance through commissioning, we

remain focused on achieving full commercial production by year-end."

CONCENTRATE SHIPMENT MILESTONE

The locally recruited Bunker Hill operations team is completing the final phases of commissioning the Company's newly

constructed processing plant and associated tailings filter press to the point where the facility can operate on a 24-hour, seven

-day-a-week basis.

The rapid progression from construction through commissioning reflects the quality of the engineering, construction, and

commissioning program led by Bunker Hill's team, together with key project partners including Gypsy Life LLC, Ausenco,

Mountain West Industrial, Metso Corporation, and numerous local contractors.

As is typical during the ramp-up of a new processing facility, the Company expects to continue optimizing plant performance

and implementing routine operational refinements as it advances toward full commercial production, targeted by the end of

2026. Management remains confident in the operation given the quality of the plant construction, the successful

commissioning achieved to date, and the experience of the operating team. The commencement of concentrate production

marks a significant step in the successful restart of the Bunker Hill Mine following more than four decades of closure and

rehabilitation.

Concentrate produced at Bunker Hill is analyzed by Silver Valley Analytical Inc. before being transported approximately 140

miles (220 kilometres) to Teck's integrated lead and zinc smelting complex in Trail, British Columbia, where it is processed

under the Company's offtake arrangements.

PROCESSING PLANT

The Bunker Hill processing plant is in Kellogg, Idaho, approximately 3.5 miles (5.6 kilometres) from the underground mine

portal at Wardner. Designed to process 1,800 tpd, the facility incorporates modern crushing, grinding, and differential flotation

circuits to produce separate lead and zinc concentrates for sale.

Flotation tailings are dewatered using a state-of-the-art filter press, with the resulting filter cake either incorporated into

underground paste backfill or placed in the Company's dry-stack tailings storage facility. This approach reduces water

consumption, minimizes environmental impact, and supports safer, more efficient underground mining operations.

The processing facility is the one of the largest and most modern mills in Idaho's historic 25-mile-long Silver Valley. It exceeds

the processing capacities of nearby operations, including Hecla Mining's Lucky Friday Mine (1,100 tpd) and Americas Gold

and Silver's Galena Mine (500 tpd), positioning Bunker Hill as a significant processing asset within the district.

Importantly, the plant has been designed with future growth in mind and can be expanded to approximately 2,500 tons per day

with relatively modest incremental capital, providing flexibility as additional mineral resources are converted into mineable

reserves and incorporated into future mine plans.

Construction of the paste backfill plant at the Wardner mine site is substantially complete, and final commissioning is

expected within the next three weeks. Once operational, the facility will provide paste backfill to underground mining

operations, improving mining efficiency, supporting ground stability, and enhancing overall mine productivity

PHOTO GALLERY

DRAWDOWN OF STANDBY FACILITY

Bunker Hill announces that it has drawn US$5 million under its existing standby facility (the " Standby Facility "), provided to

the Company by Teck, together with its affiliates, providing additional financial flexibility as the Company continues the ramp-

up of operations at the Bunker Hill Mine in Kellogg, Idaho.

The proceeds from the drawdown will be used to support working capital requirements and ongoing operational activities as the

Company advances toward full commercial production.

"This drawdown provides additional liquidity at an important stage in our ramp-up," said Sam Ash . "With the processing plant

operating, concentrate shipments underway and production continuing to increase, this facility strengthens our balance sheet

and provides additional flexibility as we execute our operating plan and work toward achieving commercial production."

The Standby Facility forms part of the Company's broader financing strategy and is intended to provide additional capital

flexibility during the initial years of operations. The Company continues to prudently manage its liquidity while focusing on

safely increasing production, optimizing plant performance and generating sustainable cash flow.

ABOUT BUNKER HILL MINING CORP.

Bunker Hill Mining Corp. is a U.S.-based mining company focused on the restart and operation of its flagship asset, the

historic Bunker Hill Mine in northern Idaho's prolific Silver Valley. One of North America's most storied mining districts, the

Bunker Hill Mine is being redeveloped as a modern producer of zinc, lead and silver concentrates through responsible mining

practices and a disciplined approach to operational execution.

The Company's strategy is centered on creating long-term value through the efficient restart, optimization and expansion of

this high-quality asset while maintaining strong environmental stewardship, safety performance and community engagement.

Bunker Hill is committed to delivering sustainable growth and maximizing shareholder returns by successfully redeveloping a

cornerstone mining operation in the United States.

Additional information is available at www.bunkerhillmining.com and on SEDAR+ and EDGAR.

On behalf of Bunker Hill Mining Corp.

Sam Ash

President and Chief Executive Officer

For additional information, please contact:

Brenda Dayton

Vice President, Investor Relations

T: 604.417.7952

E: [email protected]

Cautionary Statements

Certain statements in this news release are forward-looking and involve a number of risks and uncertainties. Such forward-

looking statements are within the meaning of that term in Section 27A of the U.S. Securities Act of 1933, as amended, and

Section 21E of the U.S. Securities Exchange Act of 1934, as amended, as well as within the meaning of the phrase ‘forward-

looking information’ in the Canadian Securities Administrators’ National Instrument 51-102 – Continuous Disclosure

Obligations (collectively, “forward-looking statements ”). Forward-looking statements are not comprised of historical facts.

Forward-looking statements include estimates and statements that describe the Company’s future plans, objectives or goals,

including words to the effect that the Company or management expects a stated condition or result to occur. Forward-looking

statements may be identified by such terms as “believes”, “anticipates”, “expects”, “estimates”, “may”, “could”, “would”, “will”,

“plan” or variations of such words and phrases.

Forward-looking statements in this news release include, but are not limited to, statements regarding: the Company’s

objectives, goals or future plans, including the ramp up of the Bunker Hill Mine and the anticipated timing thereof; whether

construction of the paste backfill plant at the Wardner mine site will be completed, the timing of such completion and whether

operations at the Wardner mine site will improve efficiency and productivity; the use of proceeds resulting from the drawdown

of the Standby Facility; and the achievement of future short-term, medium-term and long-term operational strategies. Forward-

looking statements reflect material expectations and assumptions, including, without limitation, expectations and assumptions

relating to: Bunker Hill’s ability to develop future mining plans and strategies and whether such plans will be developed in the

near term; Bunker Hill’s ability to receive sufficient project financing for the ramp-up of the Bunker Hill Mine on acceptable

terms or at all; the future price of metals; and the stability of the financial and capital markets. Factors that could cause actual

results to differ materially from such forward-looking statements include, but are not limited to, those risks and uncertainties

identified in public filings made by Bunker Hill with the U.S. Securities and Exchange Commission (the “ SEC”) and with

applicable Canadian securities regulatory authorities, and the following: the Company’s inability to raise additional capital for

project activities, including through equity financings, concentrate offtake financings or otherwise; capital market conditions;

restrictions on labor and its effects on international travel and supply chains; failure to identify mineral resources; failure to

convert estimated mineral resources to reserves; the preliminary nature of metallurgical test results; the Company’s ability to

ramp-up the Bunker Hill Mine towards commercial production and the risks of not basing a production decision on a feasibility

study of mineral reserves demonstrating economic and technical viability, resulting in increased uncertainty due to multiple

technical and economic risks of failure which are associated with this production decision including, among others, areas that

are analyzed in more detail in a feasibility study, such as applying economic analysis to resources and reserves, more

detailed metallurgy and a number of specialized studies in areas such as mining and recovery methods, market analysis, and

environmental and community impacts and, as a result, there may be an increased uncertainty of achieving any particular level

of recovery of minerals or the cost of such recovery, including increased risks associated with developing a commercially

mineable deposit, with no guarantee that production will begin as anticipated or at all or that anticipated production costs will

be achieved; failure to commence production would have a material adverse impact on the Company’s ability to generate

revenue and cash flow to fund operations; failure to achieve the anticipated production costs would have a material adverse

impact on the Company’s cash flow and future profitability; delays in obtaining or failures to obtain required governmental,

environmental or other project approvals; political risks; changes in equity markets; uncertainties relating to the availability and

costs of financing needed in the future; the inability of the Company to budget and manage its liquidity in light of the failure to

obtain additional financing, including the ability of the Company to complete the payments pursuant to the terms of the

agreement to acquire the Bunker Hill Mine complex; inflation; changes in exchange rates; fluctuations in commodity prices;

delays in the development of projects; and capital, operating and reclamation costs varying significantly from estimates and

the other risks involved in the mineral exploration and development industry. Although the Company believes that the

assumptions and factors used in preparing the forward-looking statements in this news release are reasonable, undue reliance

should not be placed on such statements or information, which only applies as of the date of this news release, and no

assurance can be given that such events will occur in the disclosed time frames or at all, including as to whether or when the

Company will achieve its project finance initiatives, or as to the actual size or terms of those financing initiatives. The

Company disclaims any intention or obligation to update or revise any forward-looking information, whether as a result of new

information, future events or otherwise, other than as required by law. No stock exchange, securities commission or other

regulatory authority has approved or disapproved of the information contained herein.

Readers are cautioned that the foregoing risks and uncertainties are not exhaustive. Additional information on these and other

risk factors that could affect the Company’s operations or financial results are included in the Company’s annual report and

may be accessed through the SEDAR+ website ( www.sedarplus.ca) or through EDGAR on the SEC website (www.sec.gov).

Photos accompanying this announcement are available at

https://www.globenewswire.com/NewsRoom/AttachmentNg/fe8c6df0-c863-4e47-bac0-5415e52ee00b

https://www.globenewswire.com/NewsRoom/AttachmentNg/ccb5499f-4994-407d-a5c1-d9ccfb2885e0

https://www.globenewswire.com/NewsRoom/AttachmentNg/743d47c1-7d16-4c4b-8290-ead6046e0bd1