Exhibit 99.1

Condensed Interim Financial Statements

For the three and six months ended June 30, 2026 and 2025

(Unaudited - Expressed in Canadian dollars)

MAYFAIR GOLD CORP.

Condensed Interim Statements of Financial Position

(Unaudited - Expressed in Canadian dollars)

Nature of operations (Note 1)

Approved and authorized for issuance on behalf of the Board of Directors:

The accompanying notes are an integral part of these condensed interim financial statements.

MAYFAIR GOLD CORP.

Condensed Interim Statements of Loss and Comprehensive Loss

(Unaudited - Expressed in Canadian dollars, except number of shares)

The accompanying notes are an integral part of these condensed interim financial statements.

MAYFAIR GOLD CORP.

Condensed Interim Statements of Cash Flows

(Unaudited - Expressed in Canadian dollars)

The accompanying notes are an integral part of these condensed interim financial statements.

MAYFAIR GOLD CORP.

Condensed Interim Statements of Changes in Shareholders’ Equity

(Unaudited - Expressed in Canadian dollars, except number of shares)

The accompanying notes are an integral part of these condensed interim financial statements.

MAYFAIR GOLD CORP.

Notes to the Condensed Interim Financial Statements

For the three and six months ended June 30, 2026 and 2025

(Unaudited - Expressed in Canadian dollars)

1.            NATURE OF OPERATIONS

Mayfair Gold Corp. (the “Company”) was incorporated pursuant to the Business Corporations Act of British Columbia on July 30, 2019. The Company’s registered office is located at Suite 3100 – 666 Burrard Street Vancouver, BC V6C 2X8. The Company’s principal place of business is 489 McDougall Street, Matheson, ON, Canada, P0K 1N0. The Company is engaged in the operation, acquisition, exploration and development of mineral properties.

The Company was listed for trading on the TSX Venture Exchange under the symbol “MFG.V”, the Frankfurt Stock Exchange under the symbol “9M5”, and the OTCQX under the symbol “MFGCF”. On January 27, 2026, the Company commenced trading on the NYSE American Stock Exchange under the ticker symbol “MINE”. The Company will remain listed on the TSX Venture Exchange under the symbol “MFG.V” and ceased trading on the OTCQX market.

These unaudited condensed interim financial statements for the three and six months ended June 30, 2026 and 2025 (“financial statements”) have been prepared on a going concern basis, which assumes that the Company will be able to meet its obligations and continue its operations for at least the next twelve months. The Company has not generated revenue from operations to date and will require additional financing or outside participation to undertake further advanced exploration of its mineral properties. Although the Company has been successful in the past in obtaining financing, there is no assurance that it will be able to obtain adequate financing in the future or that such financing will be on terms advantageous to the Company

December 2025 Share consolidation

On December 18, 2025, the Company consolidated its outstanding common shares on the basis of two pre-consolidated common shares for one post-consolidated common share (the “Share Consolidation”). All current and comparative references to the number of common shares, weighted average number of common shares, loss per share, stock options and warrants have been restated to give effect to the Share Consolidation.

2.            BASIS OF PREPARATION

Statement of compliance

These financial statements were approved by the Board of Directors and authorized for issuance on August 12, 2026.

These financial statements have been prepared in accordance with IFRS Accounting Standards as issued by the International Accounting Standards Board and interpretations of the International Financial Reporting Interpretations Committee applicable to the preparation of interim financial statements including International Accounting Standard 34 Interim Financial Reporting. These financial statements do not include all disclosures required for annual audited financial statements. Accordingly, they should be read in conjunction with the Company’s audited financial statements for the years ended December 31, 2025 and 2024 (the “Annual Financial Statements”).

Basis of presentation

The financial statements have been prepared using the historical cost basis, except for certain financial assets and liabilities which are measured at fair value, as specified by IFRS Accounting Standards, as well as information presented in the statements of cash flows. In addition, these financial statements have been prepared using the accrual basis of accounting except for cash flow information.

Functional and presentation currency

The financial statements are presented in Canadian dollars (“CAD”), which is the Company’s functional and presentation currency. The functional currency is the currency of the primary economic environment in which an entity operates. References to “US$” or “USD” are to United States dollars.

The accompanying notes are an integral part of these condensed interim financial statements.

MAYFAIR GOLD CORP.

Notes to the Condensed Interim Financial Statements

For the three and six months ended June 30, 2026 and 2025

(Unaudited - Expressed in Canadian dollars)

3.            MATERIAL ACCOUNTING POLICY INFORMATION

The same accounting policies and methods of computation are followed in these financial statements as compared with the Annual Financial Statements, except for the following:

In May 2024, the IASB issued Amendments to the Classification and Measurement of Financial Instruments (Amendments to IFRS 9 and IFRS 7). These amendments updated classification and measurement requirements in IFRS 9 Financial Instruments and related disclosure requirements in IFRS 7 Financial Instruments: Disclosures. The IASB clarified the recognition and derecognition date of certain financial assets and liabilities, and amended the requirements related to settling financial liabilities using an electronic payment system. It clarified how to assess the contractual cash flow characteristics of financial assets in determining whether they meet the ‘solely payments of principal and interest’ criterion, including financial assets that have environmental, social and corporate governance-linked features and other similar contingent features. The IASB added disclosure requirements for financial instruments with contingent features that do not relate directly to basic lending risks and costs and amended disclosures relating to equity instruments designated at fair value through other comprehensive income. The amendments are effective for annual periods beginning on or after January 1, 2026 with early application permitted. The Company adopted these amendments effective January 1, 2026 retrospectively with no restatement of comparative information, in accordance with the transition requirements on initial application of IFRS 9, and adoption did not have a material impact on the classification, measurement, or disclosure of its financial instruments.

4.            SIGNIFICANT JUDGMENTS AND SOURCES OF ESTIMATION UNCERTAINTY

The preparation of financial statements under IFRS Accounting Standards requires management to make judgments in applying its accounting policies and estimates that affect the reported amounts of assets and liabilities at the period end date and reported amounts of expenses during the reporting period. Such judgments and estimates are, by their nature, uncertain. Actual outcomes could differ from these estimates.

The impact of such judgments and estimates is pervasive throughout these financial statements and may require accounting adjustments based on future occurrences. These judgments and estimates are continuously evaluated and are based on management’s experience and knowledge of the relevant facts and circumstances. Revisions to accounting estimates are recognized in the period in which the estimate is revised and are accounted for prospectively.

In preparing these financial statements, the Company applied the same significant judgments in applying its accounting policies and is exposed to the same sources of estimation uncertainty as disclosed in its Annual Financial Statements.

5.            CASH AND CASH EQUIVALENTS

Cash is comprised of cash deposits held in reputable financial institutions and cash equivalents consist of redeemable guaranteed investment certificates (“GICs”).

A summary of the Company’s cash and cash equivalents is as follows:

MAYFAIR GOLD CORP.

Notes to the Condensed Interim Financial Statements

For the three and six months ended June 30, 2026 and 2025

(Unaudited - Expressed in Canadian dollars)

5.            CASH AND CASH EQUIVALENTS (continued)

During the three and six months ended June 30, 2026, interest income from GICs and deposits in the Company’s savings account totaled $175,239 and $409,738, respectively (2025 - $29,489 and $67,765, respectively).

6.            RESTRICTED CASH

A summary of the Company’s restricted cash is as follows:

Restricted cash and a redeemable GIC issued on May 20, 2026 with an interest rate of 2.25% are held with the bank as collateral for the Company’s credit cards issued to key management personnel.

During the three and six months ended June 30, 2026, interest income from the GIC totaled $80 and $80, respectively (2025 - $nil and $nil, respectively).

7.            SHORT-TERM INVESTMENT

On February 13, 2025, the Company purchased a short-term investment which consisted of a non-redeemable six-month GIC with a value of $3,000,000 and an interest rate of 2.95%, which matured on August 12, 2025.

During the three and six months ended June 30, 2026, interest income from the short-term investment totaled $nil and $nil, respectively (2025 - $22,004 and $33,127, respectively).

8.            PREPAID EXPENSES AND DEPOSITS

Prepaid expenses and deposits consist of insurance policy prepayments, listing fee prepayments and other expenses.

A summary of the Company’s prepaid expenses and deposits is as follows:

MAYFAIR GOLD CORP.

Notes to the Condensed Interim Financial Statements

For the three and six months ended June 30, 2026 and 2025

(Unaudited - Expressed in Canadian dollars)

9.            PROPERTY, PLANT AND EQUIPMENT

A summary of the Company’s property, plant and equipment is as follows:

Depreciation during the three and six months ended June 30, 2026 was $8,837 and $16,065, respectively (2025 - $7,955 and $15,069, respectively).

MAYFAIR GOLD CORP.

Notes to the Condensed Interim Financial Statements

For the three and six months ended June 30, 2026 and 2025

(Unaudited - Expressed in Canadian dollars)

10.            MINERAL PROPERTIES

On June 8, 2020, the Company entered into a binding asset purchase agreement (the “Fenn-Gib APA”) with Lake Shore Gold Corp. (“Lake Shore”). Pursuant to the terms of the Fenn-Gib APA, the Company agreed to acquire a portfolio of mineral interests comprising 6 mining leases, 18 patented mining claims, 144 cell claims and 3 surface rights-only patents. These properties are located in the Guibord, Munro, Michaud and McCool Townships in northeastern Ontario, Canada (collectively, the “Fenn-Gib Property”).

As consideration, the Company agreed to:

The transaction closed on December 31, 2020, at which time $13,997,500 was paid and capitalized as mineral properties.

On April 1, 2026, the Company entered into a binding asset purchase agreement (the “Plato APA”) with Plato Gold Corp. (“Plato”) to acquire additional mineral property interests contiguous or proximal to the Fenn-Gib Property. The transaction closed on May 21, 2026. These properties have been incorporated into the Company’s broader Fenn-Gib Property portfolio. The acquired interests include:

Management assessed the acquisition in accordance with IFRS Accounting Standards and determined that the acquired set did not constitute a business as defined in IFRS 3, Business Combinations. Accordingly, the transaction was accounted for as an asset acquisition.

The aggregate purchase price consisted of cash consideration of $2,500,000 (paid). In addition, certain of the acquired claims remain subject to a pre-existing 2.0% net smelter returns royalty which runs with title to the mineral properties. Management determined that no separate identifiable asset or liability arose in respect of the royalty as part of the acquisition. Accordingly, the full purchase price of $2,500,000 was capitalized to mineral properties upon closing of the transaction on May 21, 2026.

The carrying value of mineral properties as at June 30, 2026 was $16,497,500 (December 31, 2025 - $13,997,500), representing the cumulative historical acquisition cost of the Fenn-Gib Property and subsequent additions.

A summary of the Company’s exploration and evaluation expenses at the Fenn-Gib Property for the three and six months ended June 30, 2026 and 2025 is as follows:

MAYFAIR GOLD CORP.

Notes to the Condensed Interim Financial Statements

For the three and six months ended June 30, 2026 and 2025

(Unaudited - Expressed in Canadian dollars)

11.            ACCOUNTS PAYABLE AND ACCRUED LIABILITIES

12.            SHARE CAPITAL

Authorized share capital

The Company is authorized to issue an unlimited number of common shares without par value.

Issued share capital

The number of shares issued and fully paid as at June 30, 2026 is 67,138,496 (December 31, 2025 - 66,797,608).

During the six months ended June 30, 2026, the Company had the following share capital transactions:

During the year ended December 31, 2025, the Company had the following share capital transactions:

Stock options

The Company has an omnibus equity incentive plan (“the Plan”) under which non-transferable options, deferred share units, and restricted share units may be granted to directors, officers, employees or service providers of the Company. Under the Plan, the maximum number of shares which may be reserved for issuance is 10% of the number of issued and outstanding common shares. The Board of Directors has the authority and discretion to grant stock options as identified in the Plan, which includes provisions limiting the issuance of options to qualified persons and employees of the Company to maximums identified in the Plan and the vesting terms.

MAYFAIR GOLD CORP.

Notes to the Condensed Interim Financial Statements

For the three and six months ended June 30, 2026 and 2025

(Unaudited - Expressed in Canadian dollars)

12.            SHARE CAPITAL (continued)

During the six months ended June 30, 2026, the Company had the following stock option transactions:

During the year ended December 31, 2025, the Company had the following stock option transactions:

MAYFAIR GOLD CORP.

Notes to the Condensed Interim Financial Statements

For the three and six months ended June 30, 2026 and 2025

(Unaudited - Expressed in Canadian dollars)

12.            SHARE CAPITAL (continued)

A summary of the Company’s stock option activity is as follows:

A summary of the Company’s outstanding and exercisable stock options as at June 30, 2026 is as follows:

A summary of the Company’s weighted average inputs used in the BSM to calculate the fair value of the stock options granted during the six months ended June 30, 2026 and year ended December 31, 2025 is as follows:

During the three and six months ended June 30, 2026, the Company recognized share-based payments of $262,987 and $826,495, respectively (2025 - $189,251 and $425,215, respectively) from the vesting of stock options, adjusted for forfeitures of unvested options.

MAYFAIR GOLD CORP.

Notes to the Condensed Interim Financial Statements

For the three and six months ended June 30, 2026 and 2025

(Unaudited - Expressed in Canadian dollars)

12.            SHARE CAPITAL (continued)

Warrants

During the six months ended June 30, 2026, the Company had the following warrant transaction:

During the year ended December 31, 2025, the Company had the following warrant transactions:

A summary of the Company’s warrant activity is as follows:

A summary of the Company’s outstanding warrants as at June 30, 2026, is as follows:

A summary of the Company’s weighted average inputs used in the BSM to calculate the fair value of the warrants granted during the six months ended June 30, 2026 and year ended December 31, 2025 is as follows:

MAYFAIR GOLD CORP.

Notes to the Condensed Interim Financial Statements

For the three and six months ended June 30, 2026 and 2025

(Unaudited - Expressed in Canadian dollars)

13.            GENERAL AND ADMINISTRATIVE

A summary of the Company’s general and administrative expenses for the three and six months ended June 30, 2026 and 2025 is as follows:

14.            RELATED PARTY TRANSACTIONS AND KEY MANAGEMENT COMPENSATION

Parties are considered to be related if one party has the ability, directly or indirectly, to control the other party or exercise significant influence over the other party in making financial and operating decisions. Related parties may be individuals or corporate entities. A transaction is considered to be a related party transaction when there is a transfer of resources or obligations between related parties.

The Company’s related parties include directors, key management personnel of the Company, including the Chief Executive Officer (the “CEO”), Chief Operating Officer (the “COO”), Chief Financial Officer (“CFO”), Vice President of Exploration, Vice President of Mineral Resources, Vice President of Capital Markets, their companies and close family members.

A summary of the Company’s related party transactions and key management compensation for the three and six months ended June 30, 2026 and 2025 is as follows:

A summary of the amounts due to related parties in accounts payable and accrued liabilities as at June 30, 2026 and December 31, 2025 is as follows:

MAYFAIR GOLD CORP.

Notes to the Condensed Interim Financial Statements

For the three and six months ended June 30, 2026 and 2025

(Unaudited - Expressed in Canadian dollars)

15.            FINANCIAL INSTRUMENTS AND RISK MANAGEMENT

Financial instruments measured at fair value are classified into one of three levels in the fair value hierarchy according to the relative reliability of the inputs used to estimate the fair values. The three levels of the fair value hierarchy are:

The Company’s financial instruments consist of cash and cash equivalents, other receivables (excluding sales tax recoverable), restricted cash, deposits and accounts payable and accrued liabilities, which are classified as and measured at amortized cost. The carrying values approximate the fair value of these financial instruments due to their short-term nature. The Company had no financial instruments measured at fair value as at June 30, 2026 and December 31, 2025.

The Company is exposed to certain financial risks by its financial instruments. The risk exposures and their impact on the Company’s financial statements are summarized below.

Credit risk

Credit risk is the risk of financial loss to the Company if a counterparty to a financial instrument fails to fulfill its contractual obligations. The Company’s credit risk relates primarily to cash and cash equivalents and deposits. The Company minimizes its credit risk related to cash and cash equivalents by placing these financial instruments with major financial institutions. The Company considers the credit risk related to cash and cash equivalents and deposits to be minimal.

Interest rate risk

Interest rate risk is the risk that the fair value or future cash flows of a financial instrument will fluctuate because of changes in market interest rates. The objective of interest risk management is to manage and control market risk exposures within acceptable parameters while optimizing returns. The Company has no significant financial instruments with variable interest rates and has assessed interest rate risk as minimal.

Liquidity risk

Liquidity risk is the risk that the Company will not be able to meet its financial obligations when they become due. To mitigate this risk, the Company has a planning and budgeting process in place to determine the funds required to support its ongoing operations and capital expenditures. The Company endeavors to ensure that sufficient funds are raised from equity offerings to meet its operating requirements, after taking into account existing cash and expected exercise of stock options and share purchase warrants. For the three and six months ended June 30, 2026, the Company incurred a loss of $7,349,070 and $14,670,909, respectively (2025 - $2,113,058 and $3,928,691, respectively). The Company’s cash and cash equivalents are held in business accounts and are available on demand for the Company’s programs. As at June 30, 2026, the Company had a cash and cash equivalents balance of $22,948,715 (December 31, 2025 - $38,193,983) to settle current liabilities of $2,836,142 (December 31, 2025 - $1,167,556) and has assessed the liquidity risk as minimal.

Foreign exchange risk

Foreign exchange risk arises on financial instruments that are denominated in a currency other than the functional currency of the Company. The Company is exposed to foreign exchange risk from fluctuations in the US dollar to the Canadian dollar on its cash, GIC and accounts payable balances.

A summary of the Company’s financial instruments held in USD, expressed in Canadian dollars is as follows:

MAYFAIR GOLD CORP.

Notes to the Condensed Interim Financial Statements

For the three and six months ended June 30, 2026 and 2025

(Unaudited - Expressed in Canadian dollars)

15.            FINANCIAL INSTRUMENTS AND RISK MANAGEMENT (continued)

A 10% change in the US dollar exchange rate relative to the Canadian dollar would change the Company’s profit or loss by approximately $3,856 (December 31, 2025 - $91,718). The Company has assessed the foreign exchange risk as minimal.

16.            CAPITAL MANAGEMENT

The Company's objectives when managing capital are to safeguard the Company’s ability to continue as a going concern, so that it can provide returns for shareholders and benefits for other stakeholders.

Historically, the Company has been dependent on external financing to fund its activities. The capital structure of the Company consists of shareholders’ equity. The Company manages its capital structure and adjusts it for changes in economic conditions and the risk characteristics of the underlying assets, being mineral properties.

In order to maintain or adjust its capital structure, the Company may issue new shares through equity offerings or sell assets to fund operations. Management reviews the Company’s capital management approach on a regular basis. The Company is not subject to externally imposed capital requirements. There were no changes in the Company’s approach to capital management during the six months ended June 30, 2026.