The national grassland is primarily a mixed-grass prairie and has a land area of 115,890 acres (46,900 ha).

[2] In descending order of area it lies in parts of Lyman, Stanley, and Jones counties.

It is managed by the U.S. Forest Service together with the Nebraska and Samuel R. McKelvie National Forests and the Buffalo Gap and Oglala National Grasslands from common offices in Chadron, Nebraska.

There is a local ranger district office located in Pierre.

This article related to a protected area in South Dakota is a stub.