Interstate 115

I-115
I-115
Route information
	Auxiliary route of I-15
Length	1.194 mi (1.922 km)
Existed	1971–present
NHS	Entire route
Major junctions
West end	I-15 / I-90 in Butte
East end	I-15 Bus. / I-90 Bus. in Butte
Location
Country	United States
State	Montana
Counties	Silver Bow
Highway system
	Interstate Highway System; Main; Auxiliary; Suffixed; Business; Future; Montana Highway System; Interstate; US; State; Secondary;

Interstate 115 (I-115) is a 1.194-mile-long (1.922 km) auxiliary Interstate Highway in the U.S. state of Montana. It connects I-15/I-90 to Butte. The highway begins at an interchange with I-15/I-90 through generally rural areas in western Butte. It has an interchange with Excelsior Avenue before ending. The entire route was upgraded to interstate standards during the 1960s, and was further upgraded in 2005.