Coldwater Lake


Day Hike - Coldwater Lake

Explore the hummocks and lake created by the 1980 eruption of Mt. St. Helens, as well as the amazing return of varied vegetation and wildlife since the eruption, including a beaver dam.

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  • Easy
  • Mileage: 6.0 mi
  • Elevation Gain: 350 ft

Meet at 9:30 AM at the Coldwater Lake trailhead parking lot, by the boat launch, reached by driving south on I-5, east at Exit 63 onto SR 505 to SR 504, where you turn left at the T junction and continue to the meeting place.

We will first hike the Hummocks trail, which will be either 4 miles or 2.7 miles, depending on trail conditions.  Then we will have lunch at the Coldwater Lake picnic area, followed by a two mile RT hike along Coldwater Lake.  The two trailheads are very close together.  Coldwater Lake was created by debris from the 1980 Mt. St. Helens eruption that dammed Coldwater Creek and created the hummocks that we hike through on the Hummocks Trail.  We will also see a beaver dam on that trail and have spectacular views of Mt. St. Helens, if the weather cooperates.  There are nice restrooms, with flush toilets,  at the Coldwater Lake trailhead parking lot, where we meet.  There are also outhouses at the turnaround point of the Coldwater Lake trail.  The entire driving route to the trailhead parking lot is paved and free of snow.  Driving time from Tacoma to the meeting place is about two hours.  


Coldwater Lake

  • Green Trails Mount St Helens NVM No. 332S

    Trails Illustrated Mt Saint. Helens/Mount Adams

    Green Trails Spirit Lake No. 332
  • See full route/place details.
Required Equipment

Required Equipment

The Ten Essentials

  1. Navigation
  2. Sun protection
  3. Insulation (extra clothing)
  4. Illumination
  5. First aid supplies
  6. Fire
  7. Repair kit and tools, including knife
  8. Nutrition (extra food)
  9. Hydration (extra water)
  10. Emergency shelter
Trip Reports