Connecting the south end of Geology Tour Road with Dillon Road, this 4-wheel-drive road requires a high clearance vehicle. Berdoo Canyon Road exits the park after 11.5 miles (18.4 km). The last 3.9 miles (6.24 km) to Dillon Road winds past the ruins of the Berdoo Camp, which was established in the 1930s by the builders of the California Aquaduct.