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Recreation Region: Cowlitz Valley Area

Trail #250 Osborne Mountain

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.

Specific Trail Information

Trail Number

250

General Information

Low elevation trails typically melt out by mid-May. High elevation trails typically melt out by mid-July.  Snow may persist in spots on north facing slopes. There may be downed trees, washouts, and/or landslides on trails. Carrying mosquito repellent is advisable. Backcountry creeks and streams may dry out so plan ahead in case you need to bring in water.  Recreating in burned areas poses greater risks. See safety tips for burned areas. Please assist in reporting wildfires by calling 911 or Columbia Dispatch at (360) 891-5140.  Sign up for emergency alerts by county. 

Skamania County; Lewis County; Cowlitz County

No

  • No motorized use March 1 to June 30.
  • Not recommended for bicycles.
  • Closed to ATV use.

Getting There

Directions

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.

Additional Information

Operated By

Forest Service

Nearby Recreation Sites

Recreation Opportunities

Hiking Hiking
Off-Highway Vehicles (OHV) Off-Highway Vehicles (OHV)
Horse Riding and Camping Horse Riding and Camping

OHV Trail RidingOHV Trail Riding

Last updated August 6th, 2025