View of the summit from just below treeline.
Photo by Andy Goodwin

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December 3, 2018 update

Sunrise: 7:34 am

Sunset: 4:24 pm

The road to Climber's Bivouac is CLOSED. The winter climbing route (Worm Flows) out of Marble Mountain Sno-Park is the preferred climbing route for winter and spring. A Sno-park pass is required for parking at Marble Mountain Sno-Park between December 1, 2018 and April 30, 2019. There are pit toilets available, but no running water. Please plan accordingly. Advanced-purchase permits are not required at this time, though climbers will need to self-register in the log book at the climber's kiosk at the trailhead before climbing.

The road to Marble Mountain is clear and accessible. Trail has 0-5 inches of snow through the woods, with deeper snow yet exposed rocks above treeline. Many holes remain around boulders so post-holing is a serious risk. There are several feet of snow above 7,000 ft and requires traction and winter climbing techniques (ice axe, crampons/microspikes). No snowshoes necessary at this time. Be prepared for extreme cold and strong winds at the summit. A cornice is present at the crater rim, so please stay back 10-20 feet from the ledge. Snow is deep enough in the gullies for glissading, skiing, or snowboarding, but take caution- it is easy to descend away from the climbing route. Route finding may be challenging in dense cloud or fog; be sure to know the route and carry navigation equipment.

Please check the forecast as weather conditions as mountain conditions can change rapidly.

This conditions report is provided in conjunction with the US Forest Service, and is intended for personal and recreational purposes only.  Safe backcountry travel requires preparation and planning, and this information may be used for planning purposes but does not provide all the information necessary for backcountry travel. Advanced mountaineering education is strongly encouraged for winter climbing.  

The user acknowledges that it is impossible to accurately predict natural events in every instance, and the accuracy or reliability of the information provided here is not guaranteed in any way. This report describes general conditions and local variations will always occur. This report expires 24 hours after the posted time unless noted otherwise.

See the U.S. Forest Service Mount St. Helens National Volcanic Monument website for more information.

FIRE: Incident Information System has the most up to date info on all fires (prescribed or wild) around the country. Visit Washington Smoke Information and AirNow for the latest in Air Quality and forecasting. 

WEATHER: point forecasts- Marble Mountain SnoPark (2,700ft) and mid-slope (6,200ft) provides forecasts at three different elevations: summit 8,328ft, mid-slope 6,500ft and just above the trailhead 3,200ft.

AVALANCHE: Visit the Northwest Weather and Avalanche Center for the most up-to-date avalanche forecast information during winter months.

SNOWPACK: Visit these SNOTEL sites for recent snow pack readings on the south side of Mount St. Helens- June Lake (3,400ft) and Swift Creek (4,400ft).


Have a more recent report? We would love to hear from you! Email your conditions update to, photos welcome.