Scott's Cabin Trail runs from Silver Crest Picnic Area to Scott's Cabin; Cedar Grove Campground and Boucher Lookout is a 3.5 mile loop with 800-foot elevation gain.
From Highway 76, either of two roads can be used to reach the park. The one from Rincon Springs (County Road S6) is scenic but rather steep and winding. County Road S7 from Lake Henshaw is longer, but its gentle grade makes it more suitable for heavily loaded vehicles and those pulling trailers. Please note that there are no gas stations on Palomar Mountain. If you're using GoogleMaps or MapQuest, the park's physical address is: 19952 State Park Rd. Palomar CA 92060.
http://www.tripleblaze.com/trail.php?c=3&i=3568