El Reno High School, located at 407 South Choctaw, is a 2+1⁄2-story horizontally massed, detached building (two stories over raised basement).

The east half, originally built for junior high school classes, was designed by an unknown architect and was constructed in 1925–1926.

[4] The major features of this building include: flat roof with raised, shaped, and/or castellated parapet; towers with long, narrow "princess" windows; pinnacles rising from parapets or towers; and polychrome surfaces, or contrasting brick and stone work, with stone work forming copings, window and door hoods, arches, horizontal bands or water tables, and quoins.

Bedford Indiana Limestone creates hood moldings that accentuate the openings and bands that emphasize the horizontal arches.

The school's athletic facilities are located primarily at El Reno's Adams Park and the nearby Canadian County Fairgrounds, both of which are along historic U.S. Route 66.