Sourdough Mountain

A very strenuous, 11-mile round trip hike with 5,085 feet of elevation gain in the North Cascades. The trail heads up steeply and steadily through forests and meadows to an old lookout with amazing views of the Cascades.

getting there

Drive SR 20 to Gorge and  Diablo Lakes. Take the left fork onto Diablo St. just before crossing the bridge across Gorge Lake. Continue 0.7 mile and bear right, staying on Diablo St. just after crossing the bridge across Stetattle Creek. Drive 0.25 mile to the trailhead (900 ft). Park on the right side of the street.


  • Suitable Activities: Day Hiking
  • Seasons: June, July, August, September, October
  • Weather: View weather forecast
  • Difficulty: Very Strenuous
  • Length: 11.0 mi
  • Elevation Gain: 5,085 ft
  • 5,985 ft
  • Land Manager: North Cascades National Park
  • Parking Permit Required: National Park Entrance Fee
  • Recommended Party Size: 12
  • Maximum Party Size: 12
  • Maximum Route/Place Capacity: 12
  • Green Trails Diablo Dam No. 48
  • Trails Illustrated North Cascades National Park
  • USGS Diablo Dam

Upcoming Activities

CHS 2 Hike - Sourdough Mountain

Day Hiking Field trip: Conditioning Hiking Series
NORTH CASCADES CAMPOUT WEEKEND. A steep trail with a big payoff! We'll climb steadily through
Difficulty: Very Strenuous
Sat, Aug 21, 2021
No Prerequisites
4 participants
Registration closes Aug 19
Seattle Branch
Trip Reports

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