Signs Tagged With Other Boundary

Warm Springs State Hospital on MT-48 East.

Entering Curlew National Grasslands on 23000 W near Stone, Idaho. Curlew is the only national grassland in Idaho and is administered by the Caribou-Targhee National Forest.

Leaving Fishlake National Forest on I-70 west.

Entering Columbia Basin Federal Reclamation Project on I-90 east. The Columbia Basin Federal Reclamation Project is the irrigation project based off of Grand Coulee Dam.

Entering the Idaho National Laboratory on ID-22 west.

Entering Targhee National Forest on I-15 south.

US-20/US-26 West - Leaving Idaho National Laboratory in Butte County.

Entering Silver Valley sign on western Mullan interchange on I-90.

CA-254 north, Humboldt Redwoods State Park.