The 20 Most Challenging Hikes in America, Ranked

3. Disappointment Cleaver Route, Mt. Rainier National Park, Washington

Difficulty: Class 5

The Disappointment Cleaver Route is one of Mt. Rainier’s most formidable climbs, known for its steep ascent, unpredictable weather, and the challenge of navigating treacherous crevasses. With an elevation gain of over 9,000 feet, only a fraction of climbers successfully reach the 14,410-foot summit. This climb demands both peak physical fitness and advanced alpine climbing skills.

Starting from Camp Muir, climbers ascend the east flank of Rainier, facing intense conditions that require serious preparation and perseverance. Reaching the summit of this iconic peak is a legendary achievement that earns climbers lasting bragging rights. Trailhead at Paradise, best hiked from mid-May to September. A permit, which is included in the guide fee with RMI Expeditions, is required.