Terra Linda to Big Rock via 680 Trail and Loma Alta Mountain

Trail in Loma Alta Open Space Preserve · Marin County, California

12.6 mi · Point to point.

A strenuous out-and-back combining the contouring 680 Trail traverse with a climb over Loma Alta Mountain before reaching Big Rock, feeling like two hikes in one.

More in Loma Alta Open Space Preserve — campgrounds, fees, and typical weather. Get the Explore app for offline maps and live conditions. Data sources.