The Backbone Trail is a long distance trail extending 67.79 miles (109.10 km) across the length of the Santa Monica Mountains in the U.S. state of California. Its western terminus is Point Mugu State Park and its eastern terminus is Will Rogers State Historic Park in Pacific Palisades. The trail is open to hikers throughout its length; dogs, mountain bicyclists and horseback riders are allowed on portions of the trail as posted.