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Hummocks Trail

South Cascades > Mount St. Helens
46.2869, -122.2717 Map & Directions
Length
2.4 miles, roundtrip
Elevation Gain
250 feet
Highest Point
2,550 feet
Calculated Difficulty About Calculated Difficulty
Easy
The view from the Hummocks Trail. Photo by Jon Stier.
  • Dogs not allowed
  • Good for kids
  • Mountain views
  • Rivers
  • Wildflowers/Meadows
  • Wildlife

Parking Pass/Entry Fee

Northwest Forest Pass
Saved to My Backpack

Popular because it's the perfect balance between day hike and easy enough for little legs, the Hummocks Trail goes up, down and around the hummocks, strange hills that were left behind by the eruption of Mount St. Helens in 1980, forming a loop from the trailhead. Continue reading

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Hiking Hummocks Trail

Lush vegetation now covers the towering gravel mounds and the ponds in between them. Interpretive signs describe features along the first quarter mile of trail as the loop meanders through these hummocks, which have been mapped by scientists to their respective spots on Mount St. Helens' former summit. Let little ones know that cool piece of trivia before pointing out the recuperating alder forests and exploring the ponds and wetlands. 

The best view of Mount St. Helens is at the junction with the Boundary Trail, about a half mile from the trailhead. For a short and fairly easy hike, turn around here. Going on involves descending and ascending some steeper trail sections. Some trip reporters recommend hiking the Hummocks Loop in the counterclockwise direction for a steeper descent at the beginning of the hike and easier ascents at the end.

Look for resident wildlife, since this area is habitat for elk, beaver, waterfowl, great blue herons, frogs and newts. The forests are a bird mecca in spring, so this trail is a stop on the Great Washington State Birding Trail. Keep an eye out for these critters, but remember: The area is still recovering from the eruption, so please stay on the trail and respect the habitat here.

Toilet Information

  • No toilet at trailhead

More information about toilets

WTA worked here in 2020 and 2019!

Hummocks Trail

Map & Directions

Trailhead
Co-ordinates: 46.2869, -122.2717 Open in Google Maps

Before You Go

See weather forecast

Parking Pass/Entry Fee

Northwest Forest Pass

WTA Pro Tip: Save a copy of our directions before you leave! App-based driving directions aren't always accurate and data connections may be unreliable as you drive to the trailhead.

Getting There

From Castle Rock, drive east on Highway 504 (also known as the Spirit Lake Highway) for 43 miles. Take the right fork signed for Johnston Ridge Observatory, and stay on 504. Drive another 2 miles to the signed Hummocks/Boundary trailhead on the right, which has a large parking area.

More Hike Details

Trailhead

South Cascades > Mount St. Helens

Hummocks (#229)

Mount St. Helens National Volcanic Monument

Guidebooks & Maps

Day Hiking - Mount St. Helens (Romano/Theisen) (Mountaineers Books, 2015)

Hiking Guide to Washington Geology (Carson / Babcock - Keokee) p. 160-162

Green Trails No. 332S Mt. St. Helens

Buy the Green Trails Spirit Lake No. 332 map

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Hummocks Trail

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