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: 02/18/2020: 3-4 feet of snow. Forest Road 83 snow-covered, but plowed. Conditions can change rapidly. Be prepared for winter driving. Both parking lots, warming shelter and restroom open. No water. No parking allowed on the road. Elevation 2,650 ft.
Fees A Washington State Sno-Park Permit is required. Purchase Sno-Park permits in advance because they are not available on-site.
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. Permits are available for puchase at many local vendors and online.
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)
Passes: A Washington State Sno-Park Permit is required. Permits are not available on-site. Purchase one from a vendor or online at
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



Show detail SHOW

Winter Sports

Show detail SHOW
Areas & Activities



  Latitude : 

  Longitude : 

  Elevation : 
2,800 ft.