Dunham Field at O'Harra Memorial Stadium is a multi-purpose college football stadium in the United States, located on the campus of the South Dakota School of Mines & Technology (SDSM&T) in Rapid City, South Dakota.

It is the home of the South Dakota Mines Hardrockers of the Rocky Mountain Athletic Conference in NCAA Division II, as well as Rapid City's two public high schools (Central and Stevens).

[5] Work was completed and the stadium dedicated on September 16, 1938, with an 18–7 victory over the South Dakota State Jackrabbits.

The Hardrockers finished the season 8–0 (after a forfeit by Yankton College) and won that year's conference championship.

[6] The stadium underwent a $1.75 million expansion and modernization in later years through support by various state, city, county, and school entities.