The Sierra Crest is a ~500 mi (800 km) generally north-to-south ridgeline that demarcates the broad west and narrow east slopes of the Sierra Nevada (U.S.) and that extends as far east as the Sierra's topographic front (e.g., Diamond Mountains and Sierran escarpment). The northern and central Sierra Crest sections coincide with over 300 mi (480 km) of the Great Basin Divide, and the southern crest demarcates Tulare and Inyo counties and extends through Kern County to meet the Tehachapi crest.