Trails for everyone, forever

Home Go Hiking Hiking Guide Hummocks Trail

Hummocks Trail

South Cascades


South Cascades -- Mount St. Helens
View map below


2.4 miles, roundtrip


Gain: 100 ft.
Highest Point: 2500 ft.


3.90 out of 5

(21 votes) Log in to rate
WTA worked here: 2020

Parking Pass/Entry Fee


Popular because it's the perfect balance between day hike and easy enough for little legs, the Hummocks Trail is a relatively flat loop hike among strange hills that were left by the eruption of Mount St. Helens in 1980.

Interpretive signs describe features along the first quarter mile of trail as the loop meanders through these hummocks, which have been mapped by scientist to their respective spots on 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. 

You may even spot resident wildlife, as the area is habitat for elk, waterfowl, and frogs and newts. Keep an eye out for these little critters, but remember, the area is still recovering from the eruption, so please stay on the trail and respect the habitat here.


Hummocks Trail

Map & Directions

Co-ordinates: 46.2869, -122.2717 Open map in new window


South Cascades -- Mount St. Helens

Hummocks (#229)

Mount St. Helens National Volcanic Monument

See weather forecast

Guidebooks & Maps

Day Hiking - South Cascades by Dan A. Nelson

photography by Alan L. Bauer

Mountaineers Books

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

Green Trails No. 332 Spirit Lake

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 Visitor Center, and stay on 504. Drive another two miles to the Hummock/Boundary trailhead on the right.

Parking Pass/Entry Fee


You can improve or add to this guidebook entry

Hummocks Trail

155 Trip Reports

Hiked here recently?

Submit a trip report!
Trip Reports