Despite the abundant federal and state land that checkerboards the High Rockies, finding an established campsite is surprisingly difficult along the I-70 corridor. From Memorial Day to Labor Day campsites fill up quickly, especially on weekends and holidays. To improve your chances, call to reserve a campsite or arrive early in the day. Established car-camping sites generally have restrooms, water pumps, trash cans, and fire pits. Open fires are only allowed when the danger of wildfires is low. Wilderness devotees who don't relish the idea of a neighborhood of tents can escape into the vast backcountry. The Indian Peaks Wilderness Area—a string of 13,000-foot-high peaks that brace the Continental Divide north of I-70—offers limitless opportunities. As long as you are 200 feet away from a water source, you can pitch your tent anywhere.
Colorado Campground and Lodge Owners Association (970/259-1899. www.campcolorado.com).