EXHIBIT 99.1

                  CERTIFICATION PURSUANT TO SECTION 906
                    OF THE SARBANES-OXLEY ACT OF 2002

I, Fredric L. Holliger, Chief Executive Officer of Giant Industries,
Inc. ("Giant"), do hereby certify that: (a) the Quarterly Report on
Form 10-Q of Giant for the quarterly period ended June 30, 2002 (the
"Form 10-Q") to which this certification is being furnished as an
exhibit fully complies with the requirements of Section 13(a) or 15(d)
of the Securities Exchange Act of 1934, and (b) the information
contained in the Form 10-Q fairly presents, in all material respects,
the financial condition and results of operations of Giant.

Giant Industries, Inc.


By: /s/ FREDRIC L. HOLLIGER
   --------------------------------
Name:  Fredric L. Holliger
Title: Chief Executive Officer

Date:  August 14, 2002.