Business Loop I-90 - Butte

The Butte business loop follows the route of Interstate 115 and old U.S. 10-91 to Downtown Butte along a series of five streets. Cosigned with Business Loop I-15 for its entirely, the 5.5 mile route forms an Omega-shaped arc between Exits 124 and 127 along I-15/90. The route is fairly well posted as it extends east from I-115 along Iron Street to Montana Street north and Park Street east to the city center. Arizona Avenue turns the pair south to a seamless transition onto Utah Avenue South to a T-intersection with Front Street. Front Street curves the routes southeast below a Union Pacific Railroad bridge to Harrison Avenue, a four and five-lane commercial boulevard. Harrison Avenue returns the loops to I-15/90 at a parclo interchange, opposite the north end of MT 2 and Butte Plaza Mall.