The Custer Military Trail Historic Archeological District is a national historic district consisting of 18,149 acres (7,345 ha) located in Billings and Golden Valley Counties in North Dakota.

The district includes five historic sites associated with the Plains Indian War from 1864 to 1876.

Two privates in Custer's regiment, W. C. Williams and F. Neely, carved their initials into a sandstone boulder at the site.

The district was listed on the National Register of Historic Places in 2009.

This article about a property in North Dakota on the National Register of Historic Places is a stub.