Sno-Park: Marble Mountain

Area Status: Open
This area is Open

Swift Creek Trail

Marble Mountain Sno-Park is the starting point for the Worm Flows Climbing Route for Mount St Helens Summit. This is the primary climbing route used during the winter. Marble Mountain Sno-Park offers a trail system that includes 25 miles (snowmobile), and 78.4 kilometers ungroomed (ski). This area is shared with motorized and non-motorized recreationists.

Marble Mountain Ski Trail Map (.pdf)

Check Washington State Sno-Parks for current grooming conditions.

At a Glance

Current Conditions: 3/19/2019: 4 feet of snow on the ground. 83 Road is mostly clear with patches of snow and ice. Be prepared for winter driving conditions. No parking allowed on the road. A Washington State Sno-Park pass is required, and not available at the site. Marble Mountain Shelter open. Bring your own firewood if you wish to heat the shelter's stove. Elevation 2,650 ft.
Permit Info:
  • A Climbing Permit is required for each person, for each day, year round traveling above 4800 ft elevation on the slopes of Mount St. Helens.
  • A Sno-Park Permit is required at Marble Mountain Sno-Park during the winter season.
Usage: Heavy
Busiest Season: Winter
  • Snowmobiles are prohibited in the the Non-motorized corridor between Monitor Ridge and the Worm Flows climbing routes.
  • The restricted research area north of the volcano is closed to snowmobiles and to off-trail ski and snowshoe travel.
Closest Towns: Cougar, WA
Water: No
Restroom: Vault Toilets (2)
Information Center: Gifford Pinchot National Forest Offices

General Information


From Cougar, WA drive east on Lewis River Road, which turns into Forest Road 90. Continue on Forest Road 90 until the intersection with Forest Road 83. Turn left on Forest Road 83 and continue approximately 6 miles to the Marble Mountain Sno-Park. During the winter and early spring  Forest Road 83 is gated at the Sno-Park.

Recreation Map

Map showing recreational areas. Map Information



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  Latitude : 

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  Elevation : 
2,800 ft.


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