Henry Ridge Motorway is a trail which provides access to the Topanga School Trail in the Topanga Park System.

The Topanga School Trail is used to access Hondo Canyon via the Old Canyon Road. The trail is a lightly-traveled section of the Backbone Trail and becomes the Dead Horse Trail starting east of the parking lot located on Entrada Road. The trail itself is a fairly mild hike, but it does require two street crossings, with no crosswalks or lights. Proceed with caution as the trail also contains poison oak.

From the PCH, take Topanga Canyon Blvd. north for about 4.7 miles. Make a slight right turn onto Entrada Road. After about 100 feet, turn into Topanga State Park parking lot. Take the Backbone Trail west, cross Topanga Canyon Boulevard to Greenleaf Drive.