X0101 42003-05-1900000856716WESTERN GAS RESOURCES INC WGR0001228362STONEHOCKER WALTER L 1000Stock Option Right to Buy38.762003-05-194Afalse20000A2004-05-192009-05-18Common Stock20002000DGrant to Reporting Person of options to purchase 2000 shares of common stock of Western Gas Resources, Inc. Options vest in annual 1/3 increments commencing on the first anniversary of the grant date and expire on the earlier of (i) 5 years from the vesting date of any option; or (ii) 10 years from the date of grant. /s/ William J. Krysiak, Attorney in Fact for Walter L. Stonehocker2003-05-21