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* denotes a Personal Law Corporation

TUPPER JONSSON & YEADON

BARRISTERS & SOLICITORS

An Association of Lawyers and law corporations

CARL R. JONSSON* LEE S. TUPPER* 1710 - 1177 West hastings street

GLENN R. YEADON* Vancouver, b.c., canada

JEFFREY T. K. FRASER* V6E 2L3

Tel: (604) 683-9262 Local 118

Direct Line: (604) 640-6355

Fax: (604) 681-0139

Email yeadon@securitieslaw.bc.ca

REPLY ATTENTION OF: GLENN R. YEADON

OUR FILE: 46510

August 28, 2025 BY EMAIL

Canada Stockwatch

Vancouver, B.C.

By Email: to news@stockwatch.com

Market News Publishing, Inc.

Vancouver, B.C.

By Email: to news@baystreet.com

Dear Sirs:

RE: BONANZA MINING CORPORATION

We are the solicitors for the above-mentioned company, and are enclosing a copy of its News Release of even date, which we would ask that you disseminate pursuant to the TSX Venture Exchange's requirements, as well as for distribution in the normal fashion. (Please note that we will be handling the SEDAR+ filing of this News Release.)

Yours very truly,

TUPPER JONSSON & YEADON

"Glenn R. Yeadon"

Glenn R. Yeadon

GRY/ss

Enclosure

c: Bonanza Mining Corporation - via email to daytonmarks@hotmail.com

Attention: Dayton Marks

Chris Graf (by email) to cgraf@spectrummining.com

Drew Burgess (by email) to asburg100@gmail.com

TSX Venture Exchange - via SEDAR+

British Columbia Securities Commission - via SEDAR+

Alberta Securities Commission - via SEDAR+

File: '\\swfile\EmailIn\20250828 152621 Attachment bonanza nr r1 aug 28 2025.docx'

-2-

Bonanza Mining Corporation

Suite 1710 - 1177 West Hastings Street

Vancouver, B.C.

V6E 2L3

Trading Symbol: TSX-V: BNZ Telephone: 778-347-2500 Email: Dayton.Marks@MarksCapital.ca Website: www.bonanzamining.com

Bonanza Mining Corporation Announces Corporate Changes

August 28, 2025 - Vancouver, British Columbia: Bonanza Mining Corporation ("Bonanza" or the "Company") (TSX-V: BNZ) announces that Chris Graf has been appointed and rejoined the board of directors of Bonanza.

Mr. Graf had tendered his resignation on August 1, 2025 but certain personal health issues were resolved later in the month, which permitted Mr. Graf to rejoin the board.

Mr. Graf graduated from the University of British Columbia in 1974 with a degree in geological engineering and has been active for over 40 years, conducting mineral exploration programs in British Columbia, Alberta, Yukon, and in northern Mexico. He has been active in the area of northwestern BC since the 1980s, and in 1983, he staked the Kerr claims on an unexplored area of promising porphyry copper-gold mineralization at Sulphurets Creek in northwestern B.C. Since the discovery of the Kerr property Seabridge Gold Inc. has conducted several drill programs exploring the Kerr deposit and has outlined Measured and Indicated Resources of 384 million tonnes containing 2.7 million ounces of gold, 14 million ounces of silver and 3.4 billion pounds of copper and Inferred Resources of 2,589 billion tones containing 22.8 million ounces of gold, 142 million ounces of silver and 19,852 billion pounds of copper."

In 2011, Mr. Graf was the recipient of the Frank Woodside Past Presidents Award for distinguished service to the Minerals Industry from the BC and Yukon Chamber of Mines, now known as AME BC. Mr. Graf's expertise will be invaluable to the company in exploring the MC claims.

For further information, please contact:

Bonanza Mining Corporation

Suite 1710 - 1177 West Hastings Street

Vancouver, B.C. V6E 2L3

Attention: Dayton Marks, President, CEO and Director

Tel: 778-347-2500

Email: Dayton.Marks@MarksCapital.ca

or

Drew Burgess, Director

Tel: 403-383-8254

Email: asburg100@gmail.com

Neither the 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 news release.