Montana Highway 55

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Montana Highway 55

MT 55 highlighted in red
Route information
Maintained by MDT
Length12.996 mi[1] (20.915 km)
Major junctions
South end MT 41 north of Silver Star
North end I-90 at Whitehall
CountryUnited States
CountiesMadison, Silver Bow, Jefferson
Highway system
MT 49 MT 56

Highway 55 (MT 55) in the U.S. state of Montana is a route running in a northerly direction from an intersection with MT 41 about 4 miles (6.4 km) north of the small town of Silver Star. The highway extends approximately 13 miles (21 km) to an interchange with Interstate 90 (I-90) at the north edge of the town of Whitehall. The route traverses largely agricultural land in the Jefferson River valley.

Route description

Highway 55 begins at MT 41, north of Silver Star. Concurrent with MT 287, it intersects Cut Across Road. An intersection with Waterloo Road is not far off as Highway 55 proceeds northward. From the west intersects Jack Rabbit Lane, before intersecting Fish Creek Road. It intersects Airport Lane before intersecting Cape Lane. After intersecting several small roads, Highway 55 ends at I-90 at Whitehall.[2]


Before receiving its current designation, Highway 55 was designated as part of MT 287. A small segment of Highway 55 in Whitehall was a former alignment of U.S. Route 10, before U.S. 10 was deleted across Montana.

Major intersections

Madison0.0000.000 MT 41 – Twin Bridges, Butte
Silver BowNo major intersections
MT 2 west – Butte
Western end of MT 2 overlap
MT 69 east (MT 2) – Cardwell
Eastern end of MT 2 overlap
12.99620.915 I-90 – Butte, Billings
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ a b Montana Department of Transportation (January 19, 2022). "ALTIS Road Log Report" (PDF). Helena: Montana Department of Transportation. Retrieved April 7, 2017.
  2. ^ Google (June 8, 2009). "Montana Highway 55" (Map). Google Maps. Google. Retrieved June 8, 2009.