Montana Highway 81

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Montana Highway 81

MT 81 highlighted in red
Route information
Maintained by MDT
Length42.446 mi[1] (68.310 km)
Major junctions
West end MT 80 north of Arrow Creek
East end US 191 at Brooks
CountryUnited States
Highway system
MT 80 MT 82

Montana Highway 81 (MT 81) is a state highway in the U.S. state of Montana. The highway begins at an intersection with MT 80 north of the hamlet of Arrow Creek. The highway extends eastward from this point for approximately 42 miles (68 km), ending at an intersection with U.S. Route 191 (US 191) at the post office of Brooks. The landscape traversed by MT 81 is uneven and largely rural, used mainly for agriculture and livestock grazing. For much of its length, the highway is roughly paralleled by the main line of Central Montana Rail, which is headquartered in Denton.

Before receiving its current designation, MT 81 was designated as Secondary Highway 235.

Major intersections

The entire route is in Fergus County.

0.0000.000 MT 80 – Stanford, Fort BentonWestern terminus
Denton13.16121.181 S-207
14.88523.955 S-547
42.44668.310 US 191 – Lewistown, MaltaEastern terminus
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 September 23, 2016.