Wyoming Highway 220

Wyoming Highway 220
Wyoming Highway 220
Alcova Highway
	WYO 220 highlighted in red
Route information
	Maintained by WYDOT, City of Casper
Length	72.79 mi (117.14 km)
Existed	1938–present
Major junctions
West end	US 287 / WYO 789 at Muddy Gap Junction
East end	I-25 / US 20 / US 26 / US 87 in Casper
Location
Counties	Carbon, Natrona
Highway system
	Wyoming State Highway System; Interstate; US; State;

Wyoming Highway 220 (WYO 220) is the principal highway connecting the city of Casper to US 287/WYO 789. WYO 220 lies in northwestern Carbon and southern Natrona counties and along the famous Oregon Trail.^[1]

Route description[]

I-25 southbound Exit 188B - WYO 220 in Casper, WY

Wyoming Highway 220 near Martin's Cove

Wyoming Highway 220 begins its western end in Carbon County at US 287/WYO 789 at Muddy Gap Junction and from there heads northeast toward Casper.^[1] Nearing 20 miles, Highway 220 leaves Carbon County and enters Natrona County as it nears the north side of the Pathfinder Reservoir and the Pathfinder National Wildlife Refuge.^[2] WYO 220 passes north of the reservoir, now traveling more easterly as it comes upon the census-designated place (CDP) of Alcova, the center of population of Wyoming. Also to the south lies . Past Alcova, WYO 220 turns back northeast and begins to parallel the North Platte River and continue until it reaches Casper. At 53.17 miles the northern terminus of Wyoming Highway 487 is intersected as 220 continues northeast.^[2] Just before entering the Casper city limits, the two-lane highway becomes a divided multi-lane highway with two lanes for each direction of traffic, and becomes known as CY Avenue. Wyoming Highway 258 (Wyoming Boulevard) is intersected at just over 69 miles. Past WYO 258, the multi-lane division continues until just before the intersection of CY Avenue and Poplar Street. At this intersection, WYO 220 follows Poplar Street north.^[2] As WYO 220 heads north on Poplar Avenue, US 20 Business/US 26 Business (First Street) is intersected within a mile and three-quarters of a mile later, WYO 220 reaches its eastern end at Interstate 25 (exit 188B) which also carries US 20/US 26/US 87 as well.

The highway is maintained by WYDOT, except for portions of CY Avenue and Poplar Street in Casper, which are maintained locally.

History[]

Between 1926 and 1938, what is now WYO 220 was part of U.S. Route 87E (US 87E). In 1938, US 87E's portion in Wyoming was redesignated as WYO 220. Since then, there have been few routing changes except that it was connected to I-25 when the interstate was completed through Casper^[1]^[3]

Major intersections[]

County	Location	mi	km	Destinations	Notes
Carbon	Muddy Gap	0.000	0.000	US 287 / WYO 789 – Rawlins, Lander	Western terminus; highway continues as US 287/WYO 789 south
Natrona		53.170	85.569	WYO 487 – Medicine Bow	Northern terminus of WYO 487
		63.915	102.861	WYO 257 (Casper West Belt) to I-25 / US 87 / US 20 / US 26 – Sheridan, Cheyenne, Shoshoni	Southern terminus of WYO 257; opened in December 2015
	Casper	69.260	111.463	WYO 258 (Wyoming Boulevard)
		72.120	116.066	US 20 Bus. / US 26 Bus. (First Street)
		72.790	117.144	I-25 / US 20 / US 26 / US 87 – Buffalo, Cheyenne, Airport	Eastern terminus; exit 188B on I-25; road continues north as Poplar Street
1.000 mi = 1.609 km; 1.000 km = 0.621 mi