Campbell Field, officially Marv Kay Stadium at Harry D. Campbell Field, is an American college football stadium located in Golden, Colorado. The stadium serves as the home field of the Colorado Mines Orediggers football team representing the Colorado School of Mines. Campbell Field is one of the oldest football fields in existence, the oldest west of the Mississippi River and the oldest in NCAA Division II. Originally it was a dirt surface all-purpose athletic field in exactly its current configuration, built within a clay pit, a fitting mined-out home for the Orediggers. Its first athletic contest, held on May 20, 1893, was the first annual Colorado Inter-Collegiate Athletic Association Field Day, featuring many athletic contests between the University of Colorado, Colorado A&M, Colorado