Wyoming Highway 220
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| Alcova Highway | |||||||
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| Maintained by WYDOT, City of Casper | |||||||
| Length: | 72.79 mi (117.14 km) | ||||||
| Major junctions | |||||||
| West end: |
  US 287 / WYO 789 at Muddy Gap Junction
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| East end: |
    I-25 / US 20 / US 26 / US 87 in Casper
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| Location | |||||||
| Counties: | Carbon, Natrona | ||||||
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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.
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. 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. 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 Alcova Lake. Past Alcova, WYO 220 turns back northeast and begins to parallel the North Platte River and continue to until it reaches Casper. At 53.17 miles the northern terminus of Wyoming Highway 487 is intersected as 220 continues northeast. 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 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. 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.
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