Peak · Olsen Creek State Forest
Stewart Mountain
10 mi round trip2,327 ft gainHardDay hike: No permitOvernight: Designated sites
Get alerts for this hikePermits and reservations
Day hikeNo permit
No permit or reservation. Just the Discover Pass on your dashboard.
OvernightDesignated sites
Camp only at designated sites. Many DNR conservation areas do not allow overnight camping, so check the trailhead sign.
Washington DNR rules. Matched from trail managers on the map. Always confirm with the land manager before you go.
About the trail
Distance10 miRound trip, out and back
Elevation gain2,327 ftTotal climb, round trip
Summit3,087 ftFrom elevation data
Overview
Stewart Mountain is a peak reached by a 10-mile round trip from Y Road Trailhead. The route follows County Landfill Trail, then OC-ML, then #8, then #5 to the summit.
Heads up: the last stretch to the top is off trail.
Photos from hikers
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What you need
Parking and passes
This trailhead is on state land, so you need a Discover Pass on your dashboard.
Get a Discover PassGetting there
The hike starts at Y Road Trailhead. Save directions offline before you leave, since mountain roads often lose cell service.