Steptoe Butte State Park, State park observation point in Whitman County, United States.

Steptoe Butte is a 3,612-foot quartzite butte rising about 1,000 feet above the Palouse hills, 12 miles north of Colfax. A narrow paved road winds around the butte to a parking area at the summit, where an interpretive wayside exhibit stands. The park covers 150 acres and lies within the Steptoe and Kamiak Buttes National Natural Landmark.

The site took its name from Colonel Edward Steptoe, who worked in the region during the 1800s. The mountain itself formed from ancient rock types that persisted while younger surrounding rock layers accumulated over time.

The name honours Colonel Edward Steptoe. From 1888 to 1908 a hotel run by James S. "Cashup" Davis stood on the summit; it burned down in 1911. Today the butte is a launch site for paragliders and hang gliders, and photographers come for the wide views over the Palouse.

A narrow paved road winds around the butte to a parking area at the summit; the park also has picnic facilities and an interpretive wayside exhibit. The summit stands about 1,000 feet (300 m) above the surrounding farmland, and Mount Spokane is visible 70 miles (110 km) to the north. On clear days the view reaches 70 to 100 miles (110–160 km).

The rocky core formed from ancient quartzite, while the surrounding landscape grew from much younger basalt flows. This geological contrast makes the isolated peak a striking oddity in the rolling plains below.