U.S. Route 20 in Montana

U.S. Highway 20
U.S. Highway 20
	US 20 highlighted in red
Route information
	Maintained by MDT
Length	9.680 mi (15.578 km)
Major junctions
West end	US 20 at the Idaho state line
	US 191 / US 287 in West Yellowstone
East end	US 20 / US 191 / US 287 east of the Yellowstone National Park West Entrance
Location
Counties	Gallatin
Highway system
	United States Numbered Highway System; List; Special; Divided; Montana Highway System; Interstate; US; State; Secondary;

U.S. Route 20 (US 20) is a west-east highway that travels from Targhee Pass at the Idaho state line to the west portion of Yellowstone National Park at the Wyoming state line.

Route description[]

US 20 enters Montana from Idaho at Targhee Pass at the Continental Divide. From there, it curves north and east down the mountain along a tree-lined, two-lane highway with a westbound climbing lane. An access road to the north provides access to Hebgen Lake. The highway then continues through Yellowstone National Park to Wyoming.

History[]

Major intersections[]

The entire route is in Gallatin County.

Location	mi^[1]	km	Destinations	Notes
Continental Divide	0.000	0.000	US 20 west – Idaho Falls	Continuation into Idaho
Continental Divide	0.000	0.000	Targhee Pass; Montana–Idaho line
West Yellowstone	9.318	14.996	US 191 north / US 287 north (Canyon Street north) – Bozeman	Western end of US 191/US 287 concurrency
Yellowstone National Park	9.680	15.578	West Entrance; closed December-April
Yellowstone National Park	11.8	19.0	To US 20 east / US 191 south / US 287 south (West Entrance Road)	Continuation into Wyoming; US 20/US 191/US 287 resume outside of Yellowstone National Park
1.000 mi = 1.609 km; 1.000 km = 0.621 mi Closed/former Concurrency terminus Tolled

References[]

^ ^a ^b Montana Department of Transportation (2013). "Montana Road Log" (PDF). Helena: Montana Department of Transportation. Retrieved September 13, 2014.

External links[]

Route map:

( • help)

US 20, US 191, and US 287 in West Yellowstone via Corco Highways

U.S. Route 20
Previous state: Idaho	Montana	Next state: Wyoming

[MDT-1] Montana Department of Transportation (2013). "Montana Road Log" (PDF). Helena: Montana Department of Transportation. Retrieved September 13, 2014.

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