Mount St. Helens/Worm Flows

A scramble of 12 miles with 5,700 feet of gain and the preferred winter route.

GETTING THERE

Take Exit 22 off of I-5 and merge onto Dike Access Rd. Continue onto Old Pacific Highway and bear left onto E Scott Ave. At the traffic circle take the second left onto Lewis River Rd. In ~30 miles, Lewis River Rd continues as Road 90. Turn left at Forest Road 83, and in ~6 miles turn right into the Marble Mountain Sno-Park (2,600 ft).

Notes

  • Climbing permits are required and done 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

  • This route allows multiple bookings. Please check scheduled trips listed below in the "Activities" tab to see if there is another group already booked on the same day. Leaders are expected to contact the leader(s) of existing trips to ensure there are no concerns or conflicts, according to The Mountaineers Outdoor Ethics Policy.
  • Leaders are responsible for obtaining climbing permits during the permitted season.
  • 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

Basic Snowshoe - Chocolate Falls

Snowshoeing Trip
Two nights of winter camping on the southern approach to Mount St. Helens. We'll snowshoe
Difficulty: Strenuous
Fri, Feb 3, 2023 - Sun, Feb 5, 2023
Prerequisites, Leader's Permission Required
2 participants
Registration closes Jan 29
Tacoma Branch

Winter Scramble - Mount St. Helens/Worm Flows

Scrambling Trip
Overnight winter scramble of MSH, camping above Chocolate Falls.
Difficulty: Strenuous 5, Technical 4, Winter Scramble
Sat, Feb 11, 2023 - Sun, Feb 12, 2023
Prerequisites
3 participants on waitlist 1 leader
Registration closes Feb 9
Foothills Branch

Basic Snowshoe - Chocolate Falls

Snowshoeing Trip
Two nights of winter camping over the extended Presidents' Day weekend, on the southern approach
Difficulty: Strenuous
Sat, Feb 18, 2023 - Mon, Feb 20, 2023
Prerequisites, Leader's Permission Required
0 participants
Registration closes Feb 16
Tacoma Branch

Winter Mountaineering - Mount St. Helens/Worm Flows

Avalanche Safety Field trip: Intermediate Climbing Course
Our winter mountaineering weekend will teach emergency shelter construction and review avalanche saftey. For course
Difficulty: Strenuous 5, Technical 4, Winter Scramble
Sat, Feb 25, 2023 - Sun, Feb 26, 2023
Prerequisites
5 participants 0 instructors
Registration closes Feb 23
Olympia Branch

Winter Camping Field Trip - Chocolate Falls

Backcountry Skiing & Snowshoeing Field trip: Winter Camping Course - Foothills
THIS IS THE BACKCOUNTRY SKI-FRIENDLY FIELD TRIP. Skiers, splitboarders and snowshoers welcome on this field
Sat, Mar 4, 2023 - Sun, Mar 5, 2023
No Prerequisites
3 participants 0 instructors
Registration closes Feb 27
Foothills Branch

Winter Scramble - Mount St. Helens/Worm Flows

Scrambling Trip
Annual winter trek up my favorite volcano before permit season begins. Will choose the better
Difficulty: Winter Scramble
Sat, Mar 11, 2023 - Sun, Mar 12, 2023
Prerequisites, Leader's Permission Required
4 participants 1 leader
Registration opens Feb 1
Foothills Branch

WCR - Experience Trip - Mount St. Helens/Worm Flows

Climbing Field trip: Winter Mountaineering & Advanced Crevasse Rescue
Experience trip - Student Planned and Lead
Difficulty: Strenuous 5, Technical 4, Winter Scramble
Sat, Mar 18, 2023 - Sun, Mar 19, 2023
No Prerequisites
1 participant 0 instructors
Registration closes May 19
Foothills Branch

Backcountry Ski/Snowboard - Mount St. Helens/Worm Flows

Backcountry Skiing Trip
Single-day ski-mo ascent of Mt St Helens with anchor and rescue drills the afternoon before.
Difficulty: Strenuous 5, Technical 4, Winter Scramble, M2 Advanced Ski, Basic Alpine Climb
Fri, Mar 24, 2023 - Sat, Mar 25, 2023
Prerequisites, Leader's Permission Required
0 participants 0 leaders
Registration closes Mar 29
Seattle Branch

Jr. MAC Winter Weekend Trips - Mount St. Helens/Worm Flows

Youth Youth activity: Jr. MAC - WINTER
We will go over all of the learned skills and practice, practice, practice. Our weekend
Difficulty: Strenuous 5, Technical 4, Winter Scramble
Sat, Mar 25, 2023 - Sun, Mar 26, 2023
No Prerequisites
8 participants
Registration closes Mar 23
Olympia Branch

Backcountry Ski/Snowboard - Mount St. Helens/Worm Flows

Backcountry Skiing Trip
Annual early April MSH ski trip
Difficulty: Strenuous 5, Technical 4, Winter Scramble
Sat, Apr 1, 2023 - Sun, Apr 2, 2023
Prerequisites, Leader's Permission Required
2 participants 0 leaders
Registration opens Feb 1
Seattle Branch

TAC MAC Backcountry Ski/Snow Scramble - Mount St. Helens/Worm Flows

Backcountry Skiing & Youth Youth activity: Mountaineers Adventure Club - Tacoma
Snow scramble and/or backcountry ski
Difficulty: Strenuous 5, Technical 4, Winter Scramble
Sat, Apr 15, 2023
No Prerequisites
1 participant 0 instructors
Registration closes Apr 13
Tacoma Branch

Seattle Basic Alpine SIG Field Trip - Overnight Snow Scrambling - Mount St. Helens/Worm Flows

Climbing Field trip: Basic Alpine Climbing Course
McCarthy-Johnson SIG Snow Field Trip - Overnight Snow (Snow Anchors & Belays, Crevasse Rescue, Snow
Difficulty: Strenuous 5, Technical 4, Winter Scramble
Sat, Apr 15, 2023 - Sun, Apr 16, 2023
No Prerequisites, Leader's Permission Required
6 participants
Registration closes Apr 13
Seattle Branch
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
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