Interstate 115

Interstate 115 (I-115) is a 1.194-mile-long (1.922 km) auxiliary Interstate Highway which connects I-15/I-90 to Butte in the U.S. state of Montana. The highway is concurrent with I-15 Bus./I-90 Bus. for its entire length. The highway travels from an incomplete interchange with I-15/I-90 through generally rural areas in western Butte. It also has an interchange with Excelsior Avenue before terminating. The entire route was improved to Interstate standards during the 1960s, and was further improved in 2005.

"I-115" redirects here. For the isotope of iodine (I-115 or 115I), see Iodine-115.

Interstate 115

I-115 highlighted in red
Route information
Auxiliary route of I-15
Maintained by MDT
Length1.194 mi (1.922 km)
Existed1971–present
NHSEntire route
Major junctions
West end I-15 / I-90 in Butte
East end I-15 BL / I-90 BL in Butte
Location
CountryUnited States
StateMontana
CountiesSilver Bow
Highway system
  • Main
  • Auxiliary
  • Suffixed
  • Business
  • Future
  • Montana Highway System
  • Interstate
  • US
  • State
  • Secondary
← I-94→ MT 117
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