As filed with the Securities and Exchange Commission on June 15, 2007

                           Registration No. 333-37568
    ------------------------------------------------------------------------

                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                              --------------------

                         POST EFFECTIVE AMENDMENT NO. 1

                                   TO FORM S-8

                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933
                              --------------------

                             PYR ENERGY CORPORATION
             (Exact name of registrant as specified in its charter)

           Maryland                                             95-4580642
(State or other jurisdiction of                              (I.R.S. Employer
incorporation or organization)                              Identification No.)

                            1675 Broadway, Suite 2450
                             Denver, Colorado 80202
           (Address of principal executive offices including zip code)

                              --------------------

                          1996 Stock Compensation Plan
                            (Full title of the plans)

                              --------------------

                                C. Philip Tholen
                             Chief Executive Officer
                             PYR Energy Corporation
                            1675 Broadway, Suite 2450
                             Denver, Colorado 80202
                                 (303) 825-3748

                                 With a copy to:

                                 R. Scott Cohen
                           Weil, Gotshal & Manges LLP
                          200 Crescent Court, Suite 300
                                Dallas, TX 75201


                     (Name and address of agent for service)
          (Telephone number, including area code, of agent for service)

                              --------------------






                          RECENT EVENTS: DEREGISTRATION


    The Registration Statement on Form S-8 (Registration No. 333-37568) (the
"Registration Statement") of PYR Energy Corporation ("PYR"), pertaining to the
registration of certain shares of PYR's common stock, par value $0.001 per share
("Common Stock"), issuable under the 1997 Stock Option Plan and 2000 Stock
Option Plan, to which this Post-Effective Amendment No. 1 relates, was filed
with the Securities and Exchange Commission on May 22, 2000.

    PYR, Samson Investment Company ("Samson") and Samson Acquisition Corp., a
wholly owned subsidiary of Samson ("Purchaser"), entered into an Agreement and
Plan of Merger dated as of April 23, 2007 (the "Merger Agreement"), pursuant to
which, among other things, Purchaser would be merged with and into PYR, PYR
would survive as a wholly owned subsidiary of Samson and each outstanding share
of Common Stock (and the associated Series A Junior Participating Preferred
Stock purchase rights) would be converted into the right to receive $1.30 in
cash (the "Merger").

    On June 12, 2007, Purchaser acquired over 90% of the outstanding Common
Stock, and, subsequently, effected the Merger pursuant to Section 3-106 of the
Maryland General Corporation Law. The Merger became effective as specified in
the Articles of Merger filed with the Maryland State Department of Assessments
and Taxation on June 15, 2007 (the "Merger Date").

    As a result of the Merger, PYR has terminated all offerings of Common Stock
pursuant to its existing registration statements, including the Registration
Statement. In accordance with an undertaking made by PYR in the Registration
Statement to remove from registration, by means of a post-effective amendment,
any shares of Common Stock that remain unsold at the termination of the
offering, PYR hereby removes from registration all shares of Common Stock
registered under the Registration Statement which remain unsold as of the Merger
Date.













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                                   SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-8 and has duly caused this post-effective
amendment to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Denver and State of Colorado, on the 15th day of
June, 2007.

                                         PYR ENERGY CORPORATION


                                         By:  /s/  C. Philip Tholen
                                            ------------------------------------
                                             C. Philip Tholen
                                             Chief Executive Officer, President
                                             and Chief Financial Officer

     Pursuant to the requirements of the Securities Act of 1933, this
post-effective amendment to the Registration Statement has been signed by the
following persons in the capacities and on the dates indicated.




Date: June 15, 2007                          /s/  C. Philip Tholen
                                         ---------------------------------------
                                         C. Philip Tholen
                                         Chief Executive Officer, President,
                                         Chief Financial Officer and Director

                                         (principle executive officer, principle
                                         financial officer, principle accounting
                                         officer)


Date: June 15, 2007                          /s/  Scott Rowland
                                         ---------------------------------------
                                         Scott Rowland
                                         Director


Date: June 15, 2007                          /s/  Jack A. Canon
                                         ---------------------------------------
                                         Jack A. Canon
                                         Director

















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