Are dogs allowed on Mount Saint Helens via Worm Flows Trail?

Yes, dogs are allowed on Mount Saint Helens via Worm Flows Trail but must be kept on a leash at all times. Pack out waste and respect wildlife.

Do I need a permit to hike Mount Saint Helens via Worm Flows Trail?

No, Mount Saint Helens via Worm Flows Trail does not currently require a permit. Still check for seasonal closures or day-use fees with the managing agency before heading out.

How difficult is Mount Saint Helens via Worm Flows Trail?

Mount Saint Helens via Worm Flows Trail is rated expert. It is 9.7 miles long with 5,617 feet of elevation gain. Difficulty ratings reflect a combination of distance, elevation gain, and terrain — your experience will depend on your fitness level and trail conditions.

Status unknown — verify before visiting

We don't have current condition data for this trail. Check with the land manager before you go.

See Washington trail conditions

ExpertOut and Back

Washington

Mount Saint Helens via Worm Flows Trail

Cougar, Washington

9.7 mi

Distance

5,617 ft

Elev. Gain

6h 1m

Est. Time

Out & Back

Route Type

Expert

Difficulty

About This Trail

Imported description

During the winter season, The Worm Flows Climbing Route from Marble Mountain is the most direct route to the summit. There is an ice axe, a crampons, and an awareness of the snow on this route. Skis with climbing skins and snow shoes are recommended. To reach timberline, you have to use the Swift Ski Trail. Cross the west side of Swift Creek to reach Chocolate Falls. It was 3,700'. The rim crater has ridges and open slopes. Climbers can find wooden route marking posts on the timberline. The round trip is around 12 miles and takes about 7 to 10 hours. Stay away from the snow-laden slopes and gullies.

Trail Conditions

Unknown

We have no current condition data for this trail. Check with the operator before you go, and submit a report below if you've been recently.

No recent condition reports. Be the first to share what you see on the trail.

Elevation Profile

Min:818 ft

Max:2,508 ft

1,712 ft

Trail Details

Route Type: Out & Back
Surface: Dirt

Official sources & verification

We don't have curated agency sources for this trail in our cache yet. Outdoors is not the permitting authority — confirm conditions, permits, and access with the managing agency before you go. If you know who manages this trail, please tell us.

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Legacy import — verify before navigating

Path geometry came from our pre-launch legacy database. Routes have not yet been re-verified against the operator and may differ from the actual trail.

Hunt context