Choteau is a city in and the county seat of Teton County, Montana, United States. It lies along U.S. Routes 89 and 287 about 20 miles 32Square kilometre east of the Rocky Mountains, near Flathead National Forest, the Rocky Mountain Division of Lewis and Clark National Forest, and Glacier National Park. The Montana town is named for French fur-trapper and explorer Pierre Chouteau, Jr.who is also the namesake of Chouteau County, Montana.According to the United States Census Bureau, the city has a total area of 1.8 square miles, all land. The Teton River runs nearby, although for some distance upstream of Choteau it is dry during much of the year.