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Mount St. Helens National Volcanic Monument regulations apply. Avalanche hazard in spring; bring snowshoes in spring; receding snow on glissade paths expose rock hazards. Permits are required above 4800 feet, but availability is limited from May 15 to October 31; a quota system is in effect with a limit of 100 daily permit holders.
Permits are self-issued from November 1 to March 31, and sold online April 1 to October 31, in advance, on a first-come, first-served basis through the Mount St. Helens Institute. You must sign in and pick up your permit at the climbers’ register at the Marble Mountain Sno-Park or at the Lone Fir Resort in Cougar, Washington. Present your emailed online purchase confirmation when you pick up your permit. Northwest Forest Pass or an equivalent Forest Service recreation pass required for each vehicle parked at the trailhead; you will get a pass for your vehicle when you pick up your permit. A Sno-Park permit is required during the winter season.