United States
                       Securities and Exchange Commission

                                   Form 12b-25
                                                         SEC File No.: 001-15511
                                                            CUSIP No.: 693677106

                           NOTIFICATION OF LATE FILING

(Check One):  [X] Form 10-K and Form 10-KSB; [ ] Form 20-F;
              [ ] Form 11-K; [ ] Form 10-Q and Form 10-QSB; [ ] Form N-SAR

              For Period Ended:  August 31, 2004
                              
              _ Transition report on Form 10-K
              _ Transition Report on Form 20-F
              _ Transition Report on Form 11-K
              _ Transition Report on Form 10-Q
              _ Transition Report on Form N-SAR
              For the Transition Period Ended: ___________________________
              
If the notification relates to a portion of the filing checked above, identify
the Item(s) to which the notification relates.

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PART I: - REGISTRANT INFORMATION

                             PYR Energy Corporation
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                             Full Name of Registrant

                                Mar Ventures Inc.
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                            Former Name if Applicable

                            1675 Broadway, Suite 2450
                                Denver, CO 80202
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            Address of Principal Executive Office (Street and Number)
                            City, State and Zip Code



PART II - RULES 12B-25(b) AND (c)

If the subject report could not be filed without unreasonable effort or expense
and the registrant seeks relief pursuant to Rule 12b-25(b), the following should
be completed. (Check box if appropriate.)

     (a) The reasons described in reasonable detail in Part III of this form
     could not be eliminated without unreasonable effort or expense;

|X|  (b) The subject annual report, semi-annual report, transition report on
     Form 10-K, Form 20-F, Form 11-K or Form N-SAR, or portion thereof, will be
     filed on or before the fifteenth calendar day following the prescribed due
     date; or the subject quarterly report or transition report on Form 10-Q, or
     portion thereof, will be filed on or before the 5th calendar day after the
     prescribed due date; and

     (c) The accountant's statement or other exhibit required by Rule 12b-25(c)
     has been attached if applicable.


PART III - NARRATIVE

State below in reasonable detail the reasons why Forms 10-K, 20-F, 10-Q, N-SAR,
or the transition report or portion thereof, could not be filed within the
prescribed time period.

Because the Registrant has been involved in a number of other matters and
projects, the Registrant requires additional time to complete the Form 10-KSB
and therefore, the Registrant's Annual Report on Form 10-KSB regarding the
fiscal year ended August 31, 2004 could not be timely filed without unreasonable
effort or expense.

PART IV - OTHER INFORMATION

(1) Name and telephone number of person to contact in regard to this
notification.

D. Scott Singdahlsen         (303)             825-3748 
-----------------------------------------------------------
       (Name)             (Area Code)     (Telephone Number)

(2) Have all other periodic reports required under Section 13 or 15(d) of the
Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of
1940 during the preceding 12 months or for such shorter period that the
registrant was required to file such reports(s) been filed? If answer is no,
identity report(s).

[X] Yes [ ] No



(3) Is it anticipated that any significant change in results of operations from
the corresponding period for the last fiscal year will be reflected by the
earnings statements to be included in the subject report or portion thereof?

[X] Yes [ ] No

If so, attach an explanation of the anticipated change, both narratively and
quantitatively, and, if appropriate, state the reasons why a reasonable estimate
of the results cannot be made.

As a result of the acquisition of producing properties during the fiscal year
ended August 31, 2004, the Registrant anticipates that the resulting production
revenue will constitute a significant change in the results of operations from
the corresponding period for the last fiscal year. For the reasons set forth in
Part III above, a reasonable estimate of the results cannot be made at this
time.


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

                             PYR ENERGY CORPORATION
                             ----------------------
                   Name of Registrant as Specified in Charter

has caused this notification to be signed on its behalf by the undersigned
thereunto duly authorized.


Date:  November 30, 2004                   By: /s/ D. Scott Singdahlsen
                                           -------------------------------------
                                           D. Scott Singdahlsen
                                           President and Chief Executive Officer