Steptoe Butte is a quartzite island jutting out of the silty loess of the Palouse hills in Whitman County, Washington, in the northwest United States. The 3,612-foot (1,101 m) butte is preserved as Steptoe Butte State Park, a publicly owned 150-acre (61 ha) recreation area located 12 miles (19 km) north of Colfax.