Steptoe Butte is a quartzite island jutting out of the Palouse hills. The rock that forms the butte is over 400 million years old, in contrast with the 15-17 million year old Columbia River basalts that underlie the rest of the Palouse. Steptoe Butte is currently recognized as a National Natural Landmark because of its unique geological value. A narrow paved road winds around the butte, leading to a parking area at the summit. Elevation: 3,612 feet (1,101 m), approximately 1,000 feet (300 m) above the surrounding countryside.