Johnston Ridge & The Hummocks

A challenging hike that starts at the Hummocks Trail and follows part of the Boundary Trail to the Johnston Ridge Observatory. Enjoy the hummocks plains, wildflowers, and views as you are immersed in the Mount St. Helens landscape.

Temporary Closure

In May 2023, a landslide on SR-504 caused significant damage to the Spirit Lake Outlet Bridge at milepost 49. The upper portion of SR-504 between mileposts 45.2 and 51 will remain closed to the public for the remainder of 2023 and into spring 2024. Visit the WSDOT website for updates.

Getting there

Take Exit 49 off of I-5, drive SR 504 east for 45 miles, and turn right into the parking lot and trailhead (2,550 ft).

on the trail

The Hummocks

Hike The Hummocks loop either direction. It's an easy day hike of 2.5 miles with 250 feet of elevation gain.

Johnston Ridge

Hike either side of The Hummocks loop and  continue on the Boundary Trail to Johnston Ridge Observatory (4,180 ft). On the return be sure to hike the other side of The Hummocks loop. It's 9 miles round trip with 1,750 feet of elevation gain.

  • Suitable Activities: Day Hiking
  • Seasons: June, July, August, September, October, November
  • Weather: View weather forecast
  • Difficulty: Moderate/Strenuous
  • Length: 9.0 mi
  • Elevation Gain: 1,750 ft
  • 4,180 ft
  • Green Trails Mount St Helens NVM No. 332S
  • Trails Illustrated Mt Saint. Helens/Mount Adams
  • Green Trails Spirit Lake No. 332

Upcoming Activities

Day Hike - The Hummocks

Day Hiking Trip
**Preference given to 2024 Olympia Conditioning Hiking Series participants** Trip will open for registration to
Difficulty: Moderate/Strenuous
Sat, Jul 6, 2024
No Prerequisites
11 participants
Registration opens Jun 17
Olympia Branch
Steven Payne
Trip Reports

This is a list of titles that represent the variations of trips you can take at this route/place. This includes side trips, extensions and peak combinations. Not seeing a title that fits your trip? Log in and send us updates, images, or resources.

  • The Hummocks
  • Johnston Ridge
  • Boundary Trail West

There are no resources for this route/place. Log in and send us updates, images, or resources.