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Corporate Office

2828 N. Harwood, Suite 1300
Dallas, TX 75201
(214)871-3555

Investor Relations                   2828 N. Harwood, Suite 1300 Dallas, TX 75201 (214)871-3555 investors@hollyfrontier.com	Human Resources 2828 N. Harwood, Suite 1300 Dallas, TX 75201 (214)871-3555 hr@hollyfrontier.com	Lubricants & Specialty Products              International Plaza II, Suite 423 Philadelphia, PA 19113 800-456-4786
Cheyenne Refinery 300 Morrie Avenue P.O. Box 1588 Cheyenne, WY 82007 (307) 634-3551	El Dorado Refinery 1401 Douglas Road P.O. Box 1121 El Dorado, Kansas 67042-3698            (316) 321-2200	Navajo Refinery 501 East Main Artesia, New Mexico 88210 (575) 748-3311
Tulsa Refinery 1700 South Union Avenue Tulsa, Oklahoma 74107 (918) 594-6000	Woods Cross Refinery 393 South 800 West Woods Cross, Utah 84087-1435 (801) 299-6600	Asphalt 29860 N. Tatum Blovd, Suite 150 Phoenix, AZ 85050 (480) 256-1900