Douglas Spring Campground is a primitive, three-site backcountry camp in Saguaro National Park's Rincon Mountain District, at 4,800 feet. It suits an overnight in the Rincon Mountains; reaching it from Douglas Spring Trailhead is a real commitment: about 6.5 miles one way with roughly 1,800 feet of climbing. The campground is open year-round, but reserve a site and secure the backcountry permit before setting out. Parking is at the trailhead, where busy-season overflow can line the road; no vehicle reaches camp.