Rogue River-Siskiyou National Forests · Oregon, California

Illinois River

27 mi of trail, end to end · native material surface · trail No. 1161 · trail class 3 · typical grade trail_grade · tread 18-24 inches wide · hiking, bike, motorcycle, e-bike · motorized use allowed · seasonal: hiking 06/01-10/31

Campgrounds

Along the way Oak Flat Campground

Trailheads Illinois River East Trailhead Drive there · Illinois River West Trailhead Drive there

East Fork Illinois River Trailhead the Forest Service's write-up

No fee

Provides access to:

East Fork Illinois River Trail #1274 which enters Siskiyou Wilderness.

Facilities

No picnic table

No fire pit

No drinking water

No toilet

No garbage disposal - Please pack it out

Restrictions <a href="http://www.fs.usda.gov/detail/rogue-siskiyou/recreation/?cid=stelprdb5347621 ">Wilderness regulations apply</a>&nbsp;within Siskiyou Wilderness.

This trailhead on fs.usda.gov

Illinois River East Trailhead the Forest Service's write-up

season 03/27/20 to 09/30/20

Trailhead offers parking and a registration board.

Provides access to:

Illinois River Trail #1161 which enters Kalmiopsis Wilderness .

Facilities

No picnic table

No fire pit

No drinking water

Vault toilet

No garbage disposal - Please pack it out

Restrictions <a href="http://www.fs.usda.gov/detail/rogue-siskiyou/recreation/?cid=stelprdb5347621 ">Wilderness regulations apply</a>&nbsp;within Kalmiopsis Wilderness.

This trailhead on fs.usda.gov

Illinois River West Trailhead the Forest Service's write-up

There is a registration board and access to undeveloped campsites at Oak Flat.

Provides access to:

Illinois River Trail #1161

Facilities

No picnic table

No fire pit

Horse Corral

No drinking water

Vault toilet

No garbage disposal - Please pack it out

Restrictions <a href="http://www.fs.usda.gov/detail/rogue-siskiyou/recreation/?cid=stelprdb5347621 ">Wilderness regulations apply</a>&nbsp;within Kalmiopsis Wilderness.

This trailhead on fs.usda.gov

Every trail in Rogue River-Siskiyou National Forests

All 303 trails in Rogue River-Siskiyou National ForestsFind 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.