Explore details about location National Forest Development Road 991. National Forest Development Road 991 is a location situated within the Shoshone County alongside other areas such as Pinehurst, Route of the Hiawatha Trail, Little Guard Peak Road. Additionally, some smaller parts of National Forest Development Road 991 include specific areas like National Forest Development Road 3035, National Forest Development Road 943, National Forest Development Road 207 adding to the diversity of its landscape.