National Forest Development Road 400 in Shoshone County, Idaho

National Forest Development Road 400 in Shoshone County is an unpaved unclassified road. It crosses National Forest Development Road 513, National Forest Development Road 260, National Forest Development Road 2329, National Forest Development Road 959, National Forest Development Road 409 and National Forest Development Road 257 and ends at Old River Road and comes from Coeur d'Alene River Road. National Forest Development Road 400 also exists in Bonneville County and Valley County.