[8][9] The bridge was constructed in 1813–1814 to aid in the westward movement through the frontier wilderness west of Cumberland, Maryland.

[10] As a "tidal wave" of western expansion followed the opening of the National Road, Casselman Bridge had heavy traffic that included 10-ton loads drawn by 12-horse teams.

[8] The bridge was strengthened for motorized traffic in 1911 and continued in service as a highway until 1933, when a modern steel span was built nearby to serve what is now US Route 40 Alternate.

[12] In addition to walking over the historic bridge, the state park offers picnicking facilities and fishing in Casselman River.

Historic structures to the east of the park include Stanton's Mill, which is listed on the National Register of Historic Places,[2] and the restored log cabin craft shops of Spruce Forest Artisan Village.