Canyoneering, bouldering, bushwhacking and rappelling are often necessary to explore parts of the backcountry without developed trails. A notably challenging route is down Enchanted Gorge in the Middle Fork backcountry, where Disappearing Creek vanishes under huge talus piles only to re-emerge several miles downstream, hence the name. Nearby Goddard Canyon is an easier - albeit still rugged - route, and is known for its scenic meadows and many waterfalls.: The Gorge of Despair above Tehipite Valley is known for its combination of cliffs, waterfalls and deep pools, whose descent requires rappelling gear and wetsuits to achieve.: Because of the park's size, lack of cell reception and limited personnel for search and rescue operations, only experienced cross-country travelers should attempt to hike off trail.