This is one of my favorite medium length trail runs in the Santa Monica Mountains. It starts at the Ray Miller trailhead and explores the scenic grasslands of the Serrano and La Jolla Valleys. Along the way there are spectacular ocean and mountain vistas from the Ray Miller Trail and the summit of Mugu Peak.

Most of the route is on single track trail, and except for a short out & back segment to "The Ranch" in Serrano Valley, it is a complete loop of about 20 miles. Many variations are possible.

One of the better online maps I've found of the area is an Interagency Trail Management Map produced by the NPS Santa Monica Mountains National Recreation Area GIS Lab. It shows the status of trails and public lands in the Santa Monica Mountains and is broken into three parts: West - Central - East. Additional NPS SMMNRA trail management plan maps include Proposed Backbone Trail Facilities and Trails and Proposed Regional Trails.

Here is a Google Earth browser view of a GPS trace of our route from the Ray Miller trailhead and through Serrano and La Jolla Valleys.

Related post: Serrano Valley - La Jolla Valley Loop, Serrano Valley from the Chamberlain Trail