Montana Highway 3

Montana Highway 3
	MT 3 highlighted in red
Route information
	Maintained by MDT
Length	221.770 mi[1] (356.904 km)
Major junctions
South end	I-90 / US 212 in Billings
	US 12 from Lavina to Harlowton; US 191 from Harlowton to Moore; US 87 in Moore; US 89 in Armington; US 87 in Great Falls;
North end	I-15 / US 89 in Great Falls
Highway system

Montana Highway 3 (MT 3) is a highway in central Montana extending north from Billings to Great Falls.[2][3]

Route description

At its southern end, MT 3 begins at I-90 in Billings and travels northwest 47 miles (76 km) to US 12 near Lavina – this is the only section of MT 3 that is not concurrent with a US highway. MT 3 joins US 12 and travels 45 miles (72 km) west to Harlowton, where it leaves US 12 and joins US 191, and travels north for 39 miles (63 km) to Eddie's Corner (near Moore). At Eddie's Corner, MT 3 turns west, leaving US 191 and joining the US 87 / MT 200 concurrency, and travels west 65 miles (105 km) to Armington where US 89 joins the highway. The four highways continue 23 miles (37 km) to Great Falls, where it follows a 0.8-mile (1.3 km) concurrency with I-315 and ends at I-15.[1][3]

MT 3 is part of the Camino Real Corridor (Corridor 27), a High Priority Corridor that connects El Paso, Texas to the Canada–US border at Sweet Grass, Montana. The corridor is anchored by Interstate 25 and is part of the larger Ports-to-Plains Alliance. MT 3 is connected to the Canadian border via I-15, and is connected to I-25 in Buffalo, Wyoming via I-90.[4]

Major intersections

County	Location	mi[1]	km	Destinations	Notes
Yellowstone	Billings	0.000	0.000	I-90 / US 212 to I-94 – Butte, Sheridan	I-90 exit 450; US 212 is unsigned
		1.298– 1.369	2.089– 2.203	I-90 BL (Montana Avenue / 1st Avenue North)	One-way couplet
		3.499	5.631	Main Street to US 87 – Airport	Roundabout
Golden Valley		47.010	75.655	US 12 east – Roundup, Forsyth	Southern end of US 12 overlap
Golden Valley	Ryegate	63.285	101.847	S-238 north / S-300 south – Airport
Wheatland	Shawmut	76.929	123.805	S-297 north
	Harlowton	92.188	148.362	US 12 west / US 191 south – Harlowton, Big Timber	Northern end of US 12 overlap; southern end of US 191 overlap
	Judith Gap	109.990	177.012	S-297 south
Fergus	Eddies Corner	131.421	211.502	US 87 south / US 191 north / MT 200 east – Lewistown	Northern end of US 191 overlap; southern end of US 87 / MT 200 overlap
Judith Basin		137.574	221.404	S-239 west – Hobson, Utica
	Moccasin	141.350	227.481	S-426 north
		146.367	235.555	S-207 north – Benchland
		153.314	246.735	S-541 south
		159.419	256.560	MT 80 north – Stanford, Fort Benton
	Geyser	174.711	281.170	S-551 north – Geyser
		185.591	298.680	S-427 south – White Sulphur Springs
Cascade	Armington Junction	196.118	315.621	US 89 south – Monarch, White Sulphur Springs	Southern end of US 89 overlap
		199.721	321.420	S-331 north – Belt
		212.577	342.110	S-227 north / S-228 south – Sand Coulee, Highwood
	Great Falls	215.596	346.968	US 87 Byp. north (57th Street) – Malmstrom AFB
		218.696– 218.776	351.957– 352.086	US 87 north (14th Street S / 15th Street S) – Black Eagle, Havre	One-way couplet; northern end of US 87 overlap
		219.429– 219.514	353.137– 353.274	I-15 BL north (5th Street S / 6th Street S)	One-way couplet; southern end of I-15 Bus. overlap
		220.942	355.572	Fox Farm Road / 6th Street SW	Southern end of I-315 overlap; southern end of freeway
		221.435	356.365	14th Street SW	I-315 exit 0
		221.770	356.904	I-15 / US 89 north / MT 200 west – Helena, Shelby	Northern end of I-315 / I-15 Bus. / US 89 / MT 200 overlap; I-15 exit 278
1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus

References

"Montana Road Log" (PDF). Montana Department of Transportation. 2011. Retrieved September 14, 2011.
"Montana Highway 3". Montana Code Annotated 2009. State of Montana. Retrieved 2011-09-13.
Official 2009-2010 Montana Highway Travel Map (PDF) (Map). Montana Department of Transportation. Retrieved 2011-09-13.
"Statutory Listing of Corridor Descriptions". High Priority Corridors - National Highway System. FHWA. January 15, 2020. Retrieved January 10, 2021.

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[MDT-1] "Montana Road Log" (PDF). Montana Department of Transportation. 2011. Retrieved September 14, 2011.

[2] "Montana Highway 3". Montana Code Annotated 2009. State of Montana. Retrieved 2011-09-13.

[map-3] Official 2009-2010 Montana Highway Travel Map (PDF) (Map). Montana Department of Transportation. Retrieved 2011-09-13.

[4] "Statutory Listing of Corridor Descriptions". High Priority Corridors - National Highway System. FHWA. January 15, 2020. Retrieved January 10, 2021.