Devils Postpile (Thousand Island Lake) Hiking Map by Tom Harrison

Hit the trail with confidence in the spectacular Eastern Sierra! The Devils Postpile – Thousand Island Lake Hiking Map by Tom Harrison puts the rugged beauty of Devils Postpile National Monument and the northeastern Ansel Adams Wilderness right at your fingertips.

Designed for hikers and backpackers, this detailed topographic map covers an impressive network of trails, including the John Muir Trail and Pacific Crest Trail, with routes threading past alpine lakes, granite peaks, meadows, and the iconic Devils Postpile formation. Follow the trail toward Shadow Lake or make your way toward spectacular Thousand Island Lake beneath the Ritter Range.

Keep an eye out for red and white fir, lodgepole pine, quaking aspen, colorful summer wildflowers, mule deer, black bears, coyotes, eagles, and curious pine martens.

With trail mileage, elevation points, trailheads, campgrounds, ranger stations, and more, this Devils Postpile hiking map is an essential companion for exploring the High Sierra.