The Trailside Museum of Natural History is located in the historic Army Theatre at Fort Robinson State Park, three miles west of Crawford, Nebraska on U.S. Route 20.

[2] The theater hosted many types of entertainment, including boxing matches, dances, and moving pictures.

The theater was exclusively used as a gym by 1917 as automobiles and movie houses became more prevalent, allowing soldiers to seek entertainment elsewhere.

[2] The building was acquired by the University of Nebraska in 1955[3] which opened the Trailside Museum at Fort Robinson in 1961.

There are exhibits of animals that lived in Nebraska millions of years ago like the Daeodon or three-toed horse.