Klamath National Forest · California

South Fork

7.8 mi of trail, end to end · native material surface · trail No. 5463 · trail class 3 · typical grade 12-20% · tread 18-24 inches wide

Trailhead South Fork Trailhead Drive there

Big Flat Trailhead the Forest Service's write-up

No fee

The Big Flat Trailhead is the starting point for popular hikes to the Trinity Alps Wilderness including Caribou Lakes.

Restrictions Groups are limited to 10 persons. Water and garbage service are not provided. Bring enough water for drinking, cooking and washing as well as extra water to drown campfires each day. Please take all trash, garbage, fish guts and dog droppings with you when you leave. Dogs on leash only in parking lot and developed areas.

This trailhead on fs.usda.gov

Garden Gulch Trailhead (TAW) the Forest Service's write-up

A trailhead west of the town of Summerville along the South Fork of the Salmon River. From the trailhead, visitors can hike north up Garden Gulch along trail #5470, then east, on the edge and just inside the edge of the Trinity Alps Wilderness. Meeting up with the Rush Creek Trail (#5460), hikers can travel north towards Long Gulch Trailhead or return to the South Fork of the Salmon River following Rush Creek on trail #5460 to South Fork Trailhead.

This trailhead on fs.usda.gov

South Fork Trailhead the Forest Service's write-up

No fee

This trailhead is best known for the South Fork Trail following the South Fork of the Salmon River 8 miles through the Trinity Alps Wilderness to the Big Flat Trailhead. From this trailhead there are additional trails into the Trinity Alps Wilderness along Rush Creek and McNeil Creek.

Restrictions Water and garbage service are not provided. Bring enough water for drinking, cooking and washing as well as extra water to drown campfires each day. Please take all trash, garbage, fish guts and dog droppings with you when you leave. Dogs on leash only in parking lot and developed areas.

This trailhead on fs.usda.gov

All 233 trails in Klamath National ForestFind a trailForest on fs.usda.gov

About this trail's facts

The lines are the US Forest Service's National Forest System trails layer (public domain), read 2026-10-16 and simplified for the map; the length is the line's, end to end, and the class, surface, grade and tread width are the forest's own entries where it publishes them - a forest that publishes the centreline alone has none. The trailheads and the points along the way are the Service's recreation points, and the write-ups its own recarea text, unedited. Heights come from USGS 3DEP through Terrain Tiles on AWS (Mapzen/Tilezen), read along each line and rounded; a short trail on steep ground can be off by a few tens of feet. Closures change: check the forest's own site before you go.