Business Loop I-90 - Bozeman
Forming a 3.3-mile L-shaped route, Business Loop I-90 joins I-90 with the Bozeman city center between Exits 306 and 309. Seventh Avenue leads the route south along a commercial arterial into the Bozeman street grid, where the loop turns east along side U.S. 191 on Main Street (old U.S. 10). Main Street bisects Downtown northeast of Montana State University to Lindley Park while U.S. 191 south provides a gateway to Yellowstone National Park. Eastern reaches of Main Street expand into a commercial arterial leading into the parclo interchange with Interstate 90 opposite old U.S. 10 and 191. A 2016 drive along the loop yielded sporadic signing of the business route.
Updated August 1, 2026