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.

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

This is a list of titles that represent the variations of trips you can take at this route/place. This includes side trips, extensions and peak combinations. Not seeing a title that fits your trip? Log in and send us updates, images, or resources.

  • Chocolate Falls
Resources

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