Among the live oaks in southeastern San Diego County is Cottonwood Campground. The campground offers a tranquil and refreshing experience. Cottonwood Campground is an excellent starting point for day hikes, overnight backpacking trips, and equestrian use. The campground is located in the McCain Valley Resource Conservation Area. A trail out of the campground leads to the Sombrero Peak Area, Upper Bow Willow Canyon, a…