TORONTO - Dore Copper Mining Corp. (the 'Corporation' or 'Dore Copper') (TSXV: DCMC; OTCQX: DRCMF; FRA: DCM) is pleased to report positive results from its Preliminary Economic Assessment ('PEA') for the restart of the Chibougamau mining camp.

The PEA supports a hub-and-spoke operation with the high-grade Corner Bay copper-gold deposit as its main underground mine along with the Devlin copper deposit and the former Joe Mann gold mine providing feed to its Copper Rand mill (collectively, the 'Project').

The PEA demonstrates attractive project economics with optionality for expansion into a significantly larger operation, re-establishing the Chibougamau mining camp as a long-life copper and gold producer.

All values in this news release are reported in Canadian dollars (C$) unless otherwise noted.

Ernest Mast, President and CEO commented, 'The completion of the PEA is a major accomplishment from our team and gets us closer to our near-term objective of restarting the Chibougamau mining camp. This achievement has come with the excellent exploration results from Corner Bay over the last few years where we have been able to significantly grow the mineral resources. The PEA represents today's status of the projects but we envision scaled expansions and future growth at both Corner Bay and Joe Mann while eventually sequencing in other deposits across our large land package in the Chibougamau mining camp. With three projects in the PEA, the average annual production over the mine life is approximately 50 Mlbs of copper equivalent, with a high of 90 Mlbs of copper equivalent. Our vision is to operate a viable sustainable hub-and-spoke operation over multi-decades to become a significant copper producer in Quebec.'

'Our next steps include commencing a feasibility study and submitting permit application with the provincial government. We look forward to working with Ouje-Bougoumou Cree Nation and the towns of Chibougamau and Chapais with the support of the government to advance the restart of the Chibougamau mining camp.'

PEA Study Approach

The PEA envisions a hub-and-spoke model operation starting first with the underground development of the Devlin deposit via a ramp and secondly with the underground development of the Corner Bay deposit (main asset) via a ramp. Once the Devlin deposit is mined out (approximately 4 years), production at the Joe Mann mine would start and be funded out of cash flow from operations. Joe Mann benefits from an existing headframe and shaft, including all surface infrastructures.

A fixed crushing circuit and ore sorter plant (XRT) would be installed at Corner Bay and would reject the low-grade and dilution material from the Devlin and Corner Bay mines. The high-grade material would be transported by trucks to the refurbished and optimized Copper Rand mill. The filtered tailings would be transported to a dry stack tailings facility, which uses part of the footprint at the existing TMF

The Company cautions that the results of the PEA are preliminary in nature and include inferred mineral resources that are considered too speculative geologically to have economic considerations applied to them to be classified as mineral reserves. There is no certainty that the results of the PEA will be realized.

About Dore Copper Mining Corp.

Dore Copper Mining Corp. aims to be the next copper producer in Quebec with an initial production target of +50 Mlbs of copper equivalent annually by implementing a hub-and spoke operation model with multiple high-grade copper-gold assets feeding its centralized Copper Rand mill. The Corporation has delivered its PEA in May 2022 and plans to commence a feasibility study and submit permit applications by mid-year.

The Corporation has consolidated a large land package in the prolific Lac Dore/Chibougamau and Joe Mann mining camps that has produced 1.6 billion pounds of copper and 4.4 million ounces of gold1. The land package includes 13 former producing mines, deposits and resource target areas within a 60-kilometre radius of the Corporation's Copper Rand Mill.

Contact:

Tel: (416) 792-2229

Email: ernest.mast@dorecopper.com

Web: www.dorecopper.com

Cautionary Note to United States Investors

Dore Copper prepares its disclosure in accordance with the requirements of securities laws in effect in Canada, which differ from the requirements of U.S. securities laws. Terms relating to mineral resources in this news release are defined in accordance with NI 43-101 under the guidelines set out in CIM Definition Standards on Mineral Resources and Mineral Reserves, adopted by the Canadian Institute of Mining, Metallurgy and Petroleum Council on May 19, 2014, as amended ('CIM Standards'). The U.S. Securities and Exchange Commission (the 'SEC') has adopted amendments effective February 25, 2019 (the 'SEC Modernization Rules') to its disclosure rules to modernize the mineral property disclosure requirements for issuers whose securities are registered with the SEC under the U.S. Securities Exchange Act of 1934.

As a result of the adoption of the SEC Modernization Rules, the SEC will now recognize estimates of 'measured mineral resources', 'indicated mineral resources' and 'inferred mineral resources', which are defined in substantially similar terms to the corresponding CIM Standards. In addition, the SEC has amended its definitions of 'proven mineral reserves' and 'probable mineral reserves' to be substantially similar to the corresponding CIM Standards.

U.S. investors are cautioned that while the foregoing terms are 'substantially similar' to corresponding definitions under the CIM Standards, there are differences in the definitions under the SEC Modernization Rules and the CIM Standards. Accordingly, there is no assurance any mineral resources that Dore Copper may report as 'measured mineral resources', 'indicated mineral resources' and 'inferred mineral resources' under NI 43-101 would be the same had Dore Copper prepared the resource estimates under the standards adopted under the SEC Modernization Rules. In accordance with Canadian securities laws, estimates of 'inferred mineral resources' cannot form the basis of feasibility or other economic studies, except in limited circumstances where permitted under NI 43-101.

Cautionary Note Regarding Forward-Looking Statements

This news release includes certain 'forward-looking statements' under applicable Canadian securities legislation. Forward-looking statements include predictions, projections and forecasts and are often, but not always, identified by the use of words such as 'seek', 'anticipate', 'believe', 'plan', 'estimate', 'forecast', 'expect', 'potential', 'project', 'target', 'schedule', 'budget' and 'intend' and statements that an event or result 'may', 'will', 'should', 'could' or 'might' occur or be achieved and other similar expressions and includes the negatives thereof. Specific forward-looking statements in this press release include, but are not limited to the results of the PEA, including the projected production, operating costs, capital costs, sustaining costs, metal price assumptions, cash flow projections, processing mineralized material, metal recoveries and grades, concentrate grade, mine life projections, production rates at each project, process capacity, mining and processing methods, changes to the existing TMF, proposed PEA production schedule and metal production profile, estimation of mineral resources, estimated NPV and IRR, payback period, sensitivities, opportunities outlined in the PEA, potential to further enhance the economics of the Project, securing the required permits and licenses for further studies to consider operation, PEA demonstrating attractive project economics with optionality for expansion into a significantly larger operation, re-establishing the Chibougamau mining camp as a long-life copper and gold producer, existing mill having 25% excess capacity, PEA study modernizing the existing Copper Rand mill and TMF so that they are productive and cost efficient and minimizing impact on the environment, potential for additional mill feed during mine life with the advancement of the Corporation's exploration projects in Chibougamau mining camp, operating a viable hub-and spoke operation over multi-decades to become a significant copper producer in Quebec, commencing a feasibility study in Q3, submitting permit application with the provincial government later this year, potential labour cost savings by self-performance for various mill rehabilitation activities, potential for a carbon neutral operation, Corporation attempting in the feasibility study to be carbon neutral by the end of Devlin's mine life (approximately 4 years), aiming to be the next copper producer in Quebec with an initial production target of +50 Mlbs of copper equivalent annually; implementing a hub-and spoke operation model and initiating a feasibility study and permit applications after the PEA.

All statements other than statements of historical fact included in this release, including, without limitation, statements regarding the timing and ability of the Corporation to receive necessary regulatory approvals, and the plans, operations and prospects of the Corporation and its properties are forward-looking statements. Forward-looking statements are necessarily based upon a number of estimates and assumptions that, while considered reasonable, are subject to known and unknown risks, uncertainties and other factors which may cause actual results and future events to differ materially from those expressed or implied by such forward-looking statements. Such factors include, but are not limited to, actual exploration results, changes in project parameters as plans continue to be refined, future metal prices, availability of capital and financing on acceptable terms, general economic, market or business conditions, uninsured risks, regulatory changes, delays or inability to receive required regulatory approvals, health emergencies, pandemics and other exploration or other risks detailed herein and from time to time in the filings made by the Corporation with securities regulators. Although the Corporation has attempted to identify important factors that could cause actual actions, events or results to differ from those described in forward-looking statements, there may be other factors that cause such actions, events or results to differ materially from those anticipated. There can be no assurance that such statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking statements. The Corporation disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

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