This view of the San Pasqual Valley with its colorful citrus groves was taken about a third of the way up the Clevenger Canyon North trail.  The trail takes off from Highway 78 about 5 miles east of the San Diego Zoo Safari Park.  The trail is an out and back of about 5 miles with 1400-1600 feet of elevation gain.  My quads and knees got a good workout!

Links:  Modern Hiker