Trail #250 Osborne Mountain


A map depicting trails in the Sawtooth area within the Cowlitz Valley vicinity.

Sawtooth area general map in the Cowlitz Valley Vicinity.  Sites include: 
Allen Mountain Trail #269
Big Creek Campground
Big Creek Trail #252

Cave Creek Trail #255
Greenwood Lake Trail #253  
High Rock Trail #266 
Osborne Mountain Trail #250
Silver Creek Trail #258 
Teeley Creek Trail #251

Area Status: Open
This area is Open

This trail is open to motorcycles, hikers, horses and bicycles.

This trail begins in Big Creek Campground and climbs steeply through a moderately dense forest. The trail passes through a harvest area and climbs to the south side of Osborne Mountain. The trail is cut by a switchback from Forest Road 8410 (at mile 4). Continuing southeast, the trail skirts a timber harvest area and ends on Teeley Creek Trail #251 near Pothole Lake (Lower Bertha May Lake). Features include Osborne Mountain, views of Mt. Rainier, the Nisqually River Valley, and Pothole Lake.

Special Conditions: No motorized use March 1 to June 30. Not recommended for bicycles.

The campground is closed and gated from mid-September through mid-May. Access to the trail during this time is from the campground entrance road on Forest Road 52.

At a Glance

Current Conditions: 10/22/2020: Conditions unknown. Weather changes rapidly in the fall. Be prepared!
  • No motorized use March 1 to June 30.
  • Not recommended for bicycles. 
  • Closed to ATV use.
Closest Towns: Randle, WA; Packwood, WA
Water: No
Restroom: Vault Toilet in Big Creek Campground
Operated By: Forest Service
Information Center: Cowlitz Valley Ranger District

General Information


Trail begins Big Creek Campground.

From Ashford, Washington travel east on State Highway 706 for approximately 2.5 miles and turn right onto Forest Road 52 (Kernahan Road). Follow Forest Road 52 for 1.9 miles and arrive at the campground on your right.



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  Area/Length : 
5.5 miles

  Elevation : 
1800' - 4680'