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An image depicting the trail Northern Mount St Helens Loop and its surrounding area.
star 4.64 (11) · Difficult

Northern Mount St Helens Loop

Lewis County, Washington

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Trail length

27.7 km

Time

~2 days

Elevation Gain

1389 m

Hike Type

Multi-Day

“Embark on a breathtaking 28-kilometer trek through the historic volcanic vistas of Mount St. Helens.”

What to expect?

rock-formations
wildlife
mountain-views
family-friendly

Activity types

backpacking
wildflower-viewing
wildlife-viewing
nature-trips

Frequently asked questions

How long does the Northern Mount St Helens Loop take to hike?

The Northern Mount St Helens Loop covers 27.72 km, or about 17.4 miles, with 1,389 meters of elevation gain, so it is a full-day effort for strong hikers and is often treated as an overnight route. On this terrain, many parties should expect roughly 8 to 12 hours of moving time, depending on pace, weather, and how long they stop at viewpoints around Spirit Lake and the blast zone.

Where do you start the Northern Mount St Helens Loop and where can you park?

The usual access is from the Windy Ridge area on Forest Road 99 in the Mount St. Helens National Volcanic Monument. Windy Ridge Viewpoint has a developed parking area and interpretive site, and it is one of the main east-side access points for hikes in this part of the monument, with views toward the crater and Spirit Lake.

Is the Northern Mount St Helens Loop hard?

Yes. The Northern Mount St Helens Loop is rated difficult, and the numbers explain why: 27.72 km of hiking with 1,389 meters, or about 4,557 feet, of climbing. The route crosses exposed volcanic terrain near Windy Ridge, the Harmony Trail area, and the Plains of Abraham, where sun, wind, and loose footing can make the day feel harder than the mileage alone suggests.

When is the best time of year to hike the Northern Mount St Helens Loop?

The best window is usually summer into early fall, when Forest Road 99 and Windy Ridge are typically snow-free and open. East-side access to Windy Ridge is commonly closed until late June or early July because of snow, so this is not a dependable spring hike. Later summer usually offers the most reliable access and the clearest views across Spirit Lake and the crater.

Are dogs allowed on the Northern Mount St Helens Loop?

Dogs are not a good fit for this route. Parts of the northern Mount St. Helens trail system fall within restricted zones of the national volcanic monument where pets are prohibited, and the exposed pumice, sharp volcanic rock, and long mileage add extra risk even where access rules differ by segment. Checking current monument rules before setting out is important.

Can you camp on the Northern Mount St Helens Loop?

The Northern Mount St Helens Loop is listed as a multi-day route, but camping is not allowed along Forest Road 99 within the national volcanic monument corridor itself. That means an overnight plan needs to account for where camping is legally permitted outside the road corridor and any restricted-zone rules that apply on the north side of Mount St. Helens.

What landmarks do you see on the Northern Mount St Helens Loop?

This loop is known for major eruption-landscape landmarks rather than forest-only scenery. The route area includes Windy Ridge, Spirit Lake, the Harmony Trail corridor, and the Plains of Abraham, with broad views into the 1980 blast zone and toward Mount St. Helens itself. It is one of the most dramatic places in Washington to see how the volcano reshaped the landscape.

Comments and Reviews

User comments, reviews and discussions about the Northern Mount St Helens Loop, Washington.

4.64 star

average rating out of 5

11 rating(s)