SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                    FORM 6-K

                        REPORT OF FOREIGN PRIVATE ISSUER

                      PURSUANT TO RULE 13a-16 OR 15d-16 OF
                       THE SECURITIES EXCHANGE ACT OF 1934

FOR THE MONTH OF OCTOBER, 2005

COMMISSION FILE NUMBER 0-50657

                               SEABRIDGE GOLD INC.
             (Exact name of Registrant as specified in its Charter)

        172 KING STREET EAST, 3RD FLOOR, TORONTO, ONTARIO, CANADA M5A 1J3
                    (Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports
under cover Form 20-F or Form 40-F.

               Form 20-F |X|                    Form 40-F |_|

Indicate by check mark if the registrant is submitting the Form 6-K in paper as
permitted by Regulation S-T Rule 101(b)(1):     |_|


NOTE: Regulation S-T Rule 101(b)(1) only permits the submission in paper of a
Form 6-K if submitted solely to provide an attached annual report to security
holders.

Indicate by check mark if the registrant is submitting the Form 6-K in paper as
permitted by Regulation S-T Rule 101(b)(7):     |_|

NOTE: Regulation S-T Rule 101(b)(7) only permits the submission in paper of a
Form 6-K if submitted to furnish a report or other document that the registrant
foreign private issuer must furnish and make public under the laws of the
jurisdiction in which the registrant is incorporated, domiciled or legally
organized (the registrant's "home country"), or under the rules of the home
country exchange on which the registrant's securities are traded, as long as the
report or other document is not a press release, is not required to be and has
not been distributed to the registrant's security holders, and, if discussing a
material event, has already been the subject of a Form 6-K submission or other
Commission filing on EDGAR.

Indicate by check mark whether by furnishing the information contained in this
Form, the registrant is also thereby furnishing the information to the
Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.
               Yes  |_|                         No  |X|

If "Yes" is marked, indicate below the file number assigned to the registrant in
connection with Rule 12g3-2(b):

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                                   SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized. Seabridge Gold Inc. (Registrant)

                                         Seabridge Gold Inc.
                                         (Registrant)

Date: October 7, 2005

                                         By:   /s/ Rudi Fronk
                                            ------------------------------------
                                            Name:  Rudi Fronk
                                            Title: President and C.E.O.

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                                    EXHIBITS

Exhibit 99
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Press release issued October 7, 2005 in which the Registrant announced that,
based on independent analysis, the total gold resource at its 100% owned
Courageous Lake deposit has been increased by 6%. A total of 185,000 ounces have
been added to the measured and indicated categories and 343,000 ounces have been
added to the inferred category. The increase is due to a reduction in the
estimated cut-off grade from 1.0 grams of gold per tonne to 0.83 grams,
reflecting results of the independent Preliminary Assessment study recently
completed on the project .