Mount St. Helens Winter Route: Worm Flows
ElevationAscent: 5,600' 1,707 m
Descent: -5,599' -1,707 m
High: 8,258' 2,517 m
Low: 2,675' 815 m
GradeAvg Grade: 20% (11°)
Max Grade: 65% (33°)
Popular runs nearby
29.4 mi 47.4 km • Loop • 5,697 ft Ascent 1736.3 m Ascent
2.5 mi 4.1 km • Point to Point • 369 ft Ascent 112.39 m Ascent
Lava Canyon Loop
1.2 mi 1.9 km • Out and Back • 257 ft Ascent 78.27 m Ascent
12.4 mi 19.9 km • Point to Point • 2,658 ft Ascent 810.28 m Ascent
Trapper Creek Out-and-Back
7.6 mi 12.3 km • Loop • 1,704 ft Ascent 519.52 m Ascent
Panther Creek Falls Trail #137
0.3 mi 0.5 km • Loop • 37 ft Ascent 11.25 m Ascent
“The Worm Flows Climbing Route is the most direct winter route to the summit of Mount St. Helens.”— Napo GV
Need to Know
Once you are above treeline, the trail will follow some wooden posts along one of the lava flows. Eventually, the trail goes onto the rocks, where sometimes you'll see a very marked trail, but not always.
Depending on snowfall, the posts could very well be covered, so be sure to bring a GPS or the Trail Run Project mobile app to help keep you on course and off the hazardous glaciers.
Upon reaching the caldera rim, head west to reach the highest point on the volcano and a suite of fantastic panoramic views.