Trail #229 Hummocks

Area Status: Open
View of a white capped mountain from a wide open area along a trail.

Hike among the “hummocks”, huge pieces of Mount St. Helens that slid off and were part of the massive 1980 landslide. The north flank collapsed and slid away, slamming into a ridge that diverted it west into the Toutle River Valley for 14 miles. This new landscape, initially barren, now teems with life. View the returning forest, wetlands and ponds on this relatively easy, 2.5-mile loop trail. Connect with Boundary Trail #1 to head east toward Johnston Ridge Observatory.

To protect plants, animals and scientific studies stock, bicycles, and off-trail travel are prohibited. Day use only.

At a Glance

Current Conditions: 03/19/2024: Hummocks Trailhead is open and accessible. Johnston Ridge is unreachable due to a closure on State Route 504 at MP 45.2 due to a landslide. Learn More
Fees: No fee or pass required. See Mount St. Helens Map for fee and payment sites.
  • No camping
  • No stock or bicycles.
  • Dogs must be on a 6 foot leash on trail at all times.
  • No off-trail use. Off-trail travel by people or pets tramples vegetation and impacts sensitive research areas 
  • See Mount St. Helens Map for more information.
Closest Towns: Castle Rock, WA, Toutle, WA
Water: No
Restroom: No
Operated By: Forest Service
Information Center:

General Information


From Castle Rock, WA head east on State Highway 504 (Spirit Lake Highway) for 42.7 miles take the right branch and stay on 504 and drive another 2 miles to the Hummock/Boundary Trailhead on the right. 


Day Hiking

Recreation Areas

Recreation Activities


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