Loading trail…
Free — you'll pick up right here.
Watch this trail
Sign up to watch it — saving subscribes you to gate, closure and report changes.
Washington
10.1 mi
Distance
9,111 ft
Gain
6h 1m
Time
We won't guess. Here is exactly what we do and don't know.
What we do know
Inside North Cascades National Park
2 managing-area boundaries mapped — agency alerts for them feed this page automatically.
Boundary data
What's missing
No access route mapped
We don't yet know which road reaches this trailhead, so we can't tell you if it's gated.
Nobody's filed a report here yet — be the first.
Why you'll love it
Sourdough Mountain Trail
AI-suggested draft · review before you go
No permit or access details on file for this trail — check with the local land manager before you go.
Sourdough Mountain Trail is a challenging out-and-back hike in Washington that climbs steadily to rewarding alpine views. This trail gains significant elevation over its 10-mile distance, rewarding hikers with expansive vistas of the surrounding peaks and valleys. The route follows a well-established path through forested terrain before breaking into open country near the summit.
Green Point Camp Access
~3 min drive
Easy out-and-back access trail to Green Point Camp.
Sourdough Falls Trail Lower Loop
~3 min drive
Short out-and-back hike to a scenic waterfall near Sourdough Falls.
Diablo Lake Trail
~3 min drive
Scenic out-and-back to turquoise Diablo Lake with North Cascades views.
Happy Flats Trail
~3 min drive
Easy 0.30-mile loop through Washington's accessible flatlands.
Sourdough Falls Trail
~4 min drive
Short out-and-back hike to a scenic waterfall in Washington.
Happy Creek Trail
~4 min drive
Easy 1.19-mile out-and-back creek walk in Washington.
Incline Trail
~5 min drive
Steep out-and-back trail with significant elevation gain in under half a mile.
Pyramid Lake Trail
~6 min drive
Short out-and-back hike to a scenic alpine lake in Washington.
Thunder Knob Trial
~6 min drive
Short out-and-back hike to Thunder Knob with accessible summit views.
Jack Mountain Trail
~7 min drive
Accessible out-and-back hike with scenic views in Washington.
