Create an account

Start your adventure today.


    Already a member? Login

    Mount Saint Helens Summit via Worm Flows Trail

    This reflects the 10Adventures difficulty rating for each route. We aim to keep ratings consistent across regions.
    This reflects the estimated time the majority of users will take on this trail. If you are slower, add time to the top-end figure. If you are fast, then you may complete this route faster than this time range.
    This reflects the return distance of this route as measured by the GPS file.
    16.7 km
    This reflects the total elevation gained throughout this route as measured by the GPS file. This includes all ascents and descents, and is higher than what is quoted in most route guides, which simply measure the distance between the starting-point and high-point of the route.
    1,745 m
    User Ratings
    These ratings are completed by users who have completed this trail and not subject to reviews by 10Adventures.
    Be the first to add a review!
    Directions to Trailhead

    The view from Mount Saint Helens is a stunning sight, and it should be on the hiking list of every campable adventurer. The Worm Flows approach is challenging, but it requires no technical climbing skills and is the most direct winter route. This approach is just over 16.1 km long and requires 1,745 m of vertical gain. You’ll not need mountaineering skills, but skis with skins or snowshoes with cleats are recommended. We also recommend you have some avalanche training before hiking this route. The summer approach is different.

    Download the 10Adventures App

    View Mount Saint Helens Summit via Worm Flows Trail on Map

    View Map

    Join our newsletter

    Get a weekly dose of discounts and inspiration for adventure lovers

    Route Description for Mount Saint Helens Summit via Worm Flows Trail

    Mount Saint Helens is a simply gorgeous trek and should be on the bucket list of any hiker fit enough to do it. Keep in mind, this hike is more accessible than you might think! The Worm Flows approach is a winter route. It doesn’t require mountaineering skills, but it does require a solid physical effort, preparation for the conditions, and the right gear (cleated snowshoes or skis with climbing skins are a good idea). All that being done, you can enjoy the amazing views from this active volcano.

    This is a winter approach, so check out the Mount Saint Helens via Monitor Ridge route for summer climbs. You’ll want to do your best to plan for a day with minimal wind and clear weather in the forecast. The summit is almost always windy, but it can get brutal. Goggles aren’t a bad idea if you want to actually be able to enjoy your views in the gusts.

    This route begins at the Marble Mountain Sno Park. Cross Swift Creek above Chocolate Falls. You’ll traverse across ridges and slopes as you leave the treeline. There are wooden route markers up until about 1,463 m. There are also occasionally cairns.

    Pick your way through the lava flows and the rock to the false summit. Depending on the snow level, you’ll likely be traversing a snowfield as you approach the summit. Make your way up the crater rim, where amazing views of Mount Rainier appear.

    Make your way west around the rim to the summit. Enjoy the views for as long as you can, then retrace your steps back to the trailhead.

    Insider Hints for Mount Saint Helens Summit via Worm Flows Trail

    • You’ll need a climber’s permit to complete this hike.
    • Stay off the cornices on the crater rim!
    • Avalanche safety training is highly recommended before doing this hike.

    Getting to the Mount Saint Helens Summit via Worm Flows Trail Trailhead

    The trailhead for the Worm Flows Trail approach to Mount Saint Helens is in the Marble Creek Sno Park.

    Route Information

    • Backcountry Campground


    • When to do


    • Pets allowed


    • Family friendly


    • Route Signage


    • Crowd Levels


    • Route Type

      Out and back

    Mount Saint Helens Summit via Worm Flows Trail Elevation Graph

    Weather Forecast

    Check Area Weather

    Mount Saint Helens Summit via Worm Flows Trail Reviews

    Add a comment

    You must be logged in to post a comment.

    Nearby Trails

    Nearby Regions

    Get travel inspiration and discounts

    Join our weekly travel newsletter