Area 433 acres. Mostly bur oak and cedar; bisected by Louse Creek, with steep wooded slopes and rolling grasslands.
Area 244 acres. The river can be crossed by a footbridge for a view of the falls. Note: relic Pleistocene stand of paper birch on the north-facing slopes of the canyon. Watch for wild turkeys. Red-eyed vireos, American redstarts and black-and-white warblers nest here. Also Whip-poor-wills may be heard at
Includes 9 acres of Niobrara River Valley, providing river access.
Steep topography around Thomas Creek, with grassland on the hills and wooded creek-bottom.
It includes 113 acres of surface water (two lakes) and 30 acres of grassland.
Area is 2,460 acres. This area consists of habitats alternating between mature ponderosa pine forests and grasslands in typical ridge-and canyon topography. Two streams bisect the area, There are no camping facilities.
Agate Fossil Beds National Monument is located in Sioux County about 20 miles south of Harrison, off Highway 29. Habitat includes nearly 2,000 acres of Shortgrass Prairie. No published bird checklist is yet available, but 156 species have been reported for the site, including Ferruginous Hawk, Mountain Plover, Burrowing Owl,