Bainville was named for postmaster Charles Bain when the office opened in 1904. (from Cheney’s Names on the Face of Montana, Mountain Press Publishing Company) The Pioneers Pride Museum is located in Bainville and features rooms furnished as they were in the days of the pioneers. An old jail and a 1929 fire truck add to the attraction. The museum is open during summers only.
To the southeast of Bainville is Fort Union Trading Post, a National Historic Site. The original fort built in 1828 by the American Fur Company, rose at the convergence of the Missouri and Yellowstone Rivers. By 1867, it was gone, as the fur trade was coming to a halt. Today's reconstructed version is managed by the National Park Service. It's well worth seeing anytime, but especially if you can make it on the occasion of the Fort Union Rendezvous, an annual event.