Mount St. Helens/Worm Flows

Mount Saint Helens via Worm Flows is a scramble of 12 miles with 5,700 feet of gain and is the preferred winter route.

GETTING THERE

Take I-5 S and get off at exit 22 to merge onto Dike Access Rd.. Merge onto Dike Access Rd., then continue onto Old Pacific Highway. Take a slight left onto E Scott Ave., and at the traffic circle take the 2nd left onto Lewis River Rd.. After about 30 miles, Lewis River Rd. continues as Rd. 90. Take a left at NF-83, and after about 6 miles the Marble Mountain Sno-Park will be on the right.

Notes

Climbing permits are required and doen by lottery with the land manager.
A Sno-Park parking permit may be needed during month of April for the Marble Mountain Sno-Park.

information FOR LEADERS

scheduling & permits

Only one Mountaineers group schedule a trip at a time during the off "winter" season. Please check trip listings below to ensure you are the only group there on a given day. Multiple Mountaineers groups may schedule trips during the permitting season if each group has obtained a climbing permit.

Suitable Activities: Backcountry Skiing, Scrambling, Snowshoeing
Snowshoeing Category: Intermediate
Seasons: January, February, March, April, May, December
Weather: View weather forecast. View avalanche forecast.

Difficulty: Strenuous 5, Technical 4, Winter Scramble
Length: 12.0 mi
Elevation Gain: 5,700 ft
High Point: 8,363 ft

Land Manager: Mount Saint Helens National Volcanic Monument
Parking Permit Required:
Recommended Party Size: 12
Maximum Party Size: 14

Map

Recommended Maps:

USGS Mt St Helens
Green Trails Mount St Helens NVM No. 332S
Green Trails Mt St Helens NW No. 364S

Activities

Upcoming Activities

There are no activities scheduled at this location.

Trip Reports

Titles

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