Castle Rock Trail Camp - Frog Flat in CA -- Campground & RV Camping in California
Castle Rock Trail Camp - Frog Flat in CA
CA State Parks allows overnight stays only at the designated sites here.
Castle Rock Trail Camp encompasses 20 backcountry sites distributed between the main area and Frog Flat, situated along the crest of the Santa Cruz Mountains at one of the Bay Area's highest ridges. Accessible via a 2.6-mile hike along the Saratoga Gap Trail, the trail camp features piped water, vault toilets, and fire rings; each site has a table. Black oaks, knobcone pines, and coastal redwoods surround the sites. Frog Flat's five sites offer more exposure and separation, popular for stargazing.
Grounded in parks.ca.gov · read August 24, 2026The road in has not been measured -- unknown, not bad. Flat ground is scarce -- under a tenth of the terrain within a few hundred yards is level.
Night skies measure Bortle 4 -- a rural sky with a glow on the horizon. Castle Rock stands 837 ft above the site, 1.5 miles east. San Lorenzo River runs 0.6 mi off. The nearest town, Saratoga, is 5.7 mi off.
September normals 56–78°F, 0.2″ rain. Monthly averages, PRISM 1991–2020.