11 Most Difficult Mountains to Climb in US

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3. Forbidden Peak, West Ridge

Location: Washington

Altitude: 8,815 feet

Elevation gain: 5,600 feet

Time required: 1-2 days

Doesn’t the name sound inviting? By the way, Forbidden Peak is included on the list of 50 Classic Climbs of North America. You’ll need a standard alpine rock rack, ice axe, and crampons.

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