Robert Louis Stevenson State Park is a California state park, located in Sonoma, Lake and Napa counties United States. The park offers a 5-mile (8 km) hike to the summit of Mount Saint Helena from which much of the Bay Area can be seen. On clear days it is possible to see the peak of Mount Shasta, 192 miles (310 km) distant. The area has rough terrain, with evergreen forests in the canyons on north-facing slopes and chaparral on the south-facing slopes.