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Sno-Park: Marble Mountain

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. Note: Marble Mountain Sno-Park is not a location for recreational sledding

View a Marble Mountain Ski Trail (non-motorized) Map. Visit the Washington State Sno-Park page for additional information. 

Marble Mountain Sno-Park is also the starting point for the Worm Flows Climbing Route for Mount St Helens. This is the primary climbing route used during the winter. View Climbing Information & Safety Tips.

See the June lake SNOTEL site for updated snow conditions around marble mountain: https://www.nwrfc.noaa.gov/snow/snowplot.cgi?MRBW1 

General Information

December - April

December 1- April 1. Day use only: open sunrise to sunset

  • Snowmobiles are prohibited in 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.

Washington State Sno-Park Permit is required Dec. 1 to March 31.  Purchase online or at local vendors. One per vehicle. Not available on-site.

Mount St. Helens Climbing Permit is required for each person, for each day, year-round, traveling above 4800 feet on the slopes of Mount St. Helens. April 1 through Oct. 31: Permits purchased in advance at Recreation.gov on a rolling basis. Nov. 1 to March 31: Permits available at trailhead for free & are self-issued.

Day Use:
Washington State Sno-Park Permit required December 01 - March 31 :
$25 per day
$50 per season
$70 per season Special Groomed Trail sticker

Washington State Sno-Park Permit required Dec. 1 to March 31. 

Contact Name: Mount St. Helens National Volcanic Monument & District

Contact Phone: (360) 449-7800

Mount St Helens district Office building with a green lawn in front and pathway leading to the entrance.

Address: 42218 N.E. Yale Bridge Rd. Amboy, WA 98601
Phone: (360) 449-7800
Hours: Mon, Wed & Fri: 9am - 4:00pm (closed for lunch: 12:00 - 1pm); CLOSED: Tues, Thurs, Sat & Sun. (Closed on federal holidays)

Getting There

Latitude / Longitude

Latitude: 46.130678

Longitude: -122.169826

Elevation

2,800 ft.

Directions

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.

Facility and Amenity Information

Restrooms

Vault toilet(s)

Water

Potable water is not available at this site.

Recreation Opportunities

Last updated April 28, 2026