Details

Activities
- Hike
- Snowshoe
- Backcountry Ski
No Mountain Biking
Riding Area

Southwest
Washington
Ref Number

244
Difficulty Rating

Black Diamond rate
Hiking SAC Scale

T1 Hiking
Trail Type

Ski Run (Off-Piste)
Snow Grooming

Backcountry
Trail Usage

Multi-use
Direction

Both Directions
Physical Rating

Hard
Trail Visibility

Sometimes hard to follow
Alpine Trail

Yes
eBike Allowed

No

The worm flow trail is the preferred climbing route for Winter/Spring climbers wishing to ascend to the rim of Mt. St. Helens. This route ascend the mountain one ridge over from the Summer climbing route, Monitor Ridge, eventually joining the Summer route at the top of the false Summit. The Marble Mountain snopark, where you begin this route, is just barely over 2000 feet in elevation, adding significantly to the elevation you'll have to climb to summit the mountain. Be prepared to boot pack for the first mile or two, potentially on bare dirt, before you'll be able to click in to your skis or split boards. There is a challenging crossing above Chocolate falls, and this route, although "non technical" is by no means a cakewalk either. Ski crampons are highly recommended in addition to your skins. An ice axe might be a good addition as well as crampons for your boots as conditions can become glare ice with melt/freeze cycles. Conditions are highly variable. Bring layers, wear sunscreen. Avalanche danger can be extreme. Check the avalanche forecast and analyze the snowpack on your way up.

Access Info

Access is from the Marble Mountain snopark off of forest service road 83. Valid Washington Sno Park permit is required Dec1 - March 31. Permits can be obtained in the town of Cougar, WA.

More Stats for Worm Flows Climbing Route bike trail trail

Altitude change

4,528 ft
Altitude min

3,720 ft
Altitude start

3,720 ft
Altitude end

8,248 ft
Grade

31.9%
Grade max

0.5%
Grade min

139.9%
Distance climb

3 miles
Distance down

30 ft
Distance flat

20 ft
view trail stats

Trailforks scans users ridelogs to determine the most popular direction each trail is ridden. A good flowing trail network will have most trails flowing in a single direction according to their intension.
The colour categories are based on what percentage of riders are riding a trail in its intended direction.

Trailforks scans ridelogs to determine the last time a trail was ridden.

The intended direction a trail should be ridden.

Colors indicate trail is missing specified detail.

Trailforks scans ridelogs to determine which trails are ridden the most in the last 9 months. Trails are compared with nearby trails in the same city region with a possible 25 colour shades. Think of this as a heatmap, more rides = more kinetic energy = warmer colors.