Montana Highway 2 (MT 2) is a 63.241-mile-long (101.777 km) state highway in the southern part of the U.S. state of Montana. It extends from Interstate 15 (I-15) and I-90 in Butte to I-90 in Three Forks. Previously, this roadway was a part of U.S. Route 10 (US 10).

MT 2 begins in Butte at an interchange with I-15 and I-90, which travel concurrently through the city. The highway heads south and then southeast through rural Silver Bow County. The highway crosses Pipestone Pass and enters Jefferson County. It travels through Whitehall and Cardwell. As it nears Three Forks, MT 2 meets US 287 and the two highways travel concurrently for approximately ten miles (16 km). Just west of Three Forks, MT 2 splits away from US 287 and then enters the city. The highway ends at another interchange with I-90; the roadway continues as Secondary Highway 205 (S-205).

County	Location	mi	km	Destinations	Notes
Silver Bow	Butte	0.000	0.000	I-15 / I-90
		3.050	4.908	S-393 south
Jefferson	No major junctions
Silver Bow	No major junctions
Jefferson	​	20.422	32.866	MT 41 south – Twin Bridges, Virginia City
	​	28.797	46.344	MT 55 south – Virginia City, Dillon	Western end of MT 55 overlap
	Whitehall	29.347	47.229	MT 55 north / MT 69 begins	Eastern end of MT 55 overlap; western end of MT 69 overlap
	​	35.447	57.046	MT 69 north / S-359 begins – Boulder	Eastern end of MT 69 overlap; western end of S-359 overlap
	Cardwell	36.774	59.182	S-359 south	Eastern end of S-359 overlap
	​	49.375	79.461	US 287 south – Yellowstone National Park	Western end of US 287 overlap
Broadwater	​	59.114	95.135	US 287 north – Helena	Eastern end of US 287 overlap
Gallatin	Three Forks	62.002	99.783	S-287 south
		63.241	101.777	I-90 / S-205 east – Butte, Billings
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus

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