Montana Highway 81

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Montana State Highway 81 is a short highway located in northern Montana extending west from Rexford to Lake Koocanusa.

0 mile	Begins at Rexford as a branch off Montana State Highway 37 and proceeds west	48°54′17.18″N, 115°06′15.87″W
3 miles	Reaches Lake Koocanusa where it ends	48°54′41.30″N, 115°09′51.86″W

edit Montana State Primary Highways
1	2	3	5	7	10	13	16
17	19	21	23	24	25	28	35
37	38	39	40	41	42	43	44
47	48	49	55	56	59	64	66
69	72	78	80	81	82	83	84
85	86	87	89	117	135	141	146
200	287
List of Montana numbered highways