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U.S. Route 20 in Wyoming

From Wikipedia, the free encyclopedia
Segment of American highway
This article is about the section of U.S. Route 20 in Wyoming. For the entire route, seeU.S. Route 20.

U.S. Highway 20 marker
U.S. Highway 20
Map
US 20 highlighted in red, with its unofficial segment throughYellowstone National Park highlighted in blue
Route information
Maintained byWYDOT
Length434.003 mi[1] (698.460 km)
RestrictionsIntermittent closures during winter
Major junctions
West endEastern entrance ofYellowstone National Park
Major intersections
East endUS 20 at Nebraska state line
Location
CountryUnited States
StateWyoming
CountiesPark,Big Horn,Washakie,Hot Springs,Fremont,Natrona,Converse,Niobrara
Highway system
  • Wyoming State Highway System
←US 18→WYO 22

U.S. Highway 20 (US 20) is an east–west highway in the state ofWyoming. The eastern segment of US 20 in the state starts at the eastern entrance toYellowstone National Park along with the western terminuses ofUS 14 andUS 16. US 14/US 16/US 20 runs east toGreybull, where US 14 continues east and US 16/US 20 turns south; atWorland, US 16 turns east while US 20 continues south, passing throughWind River Canyon south ofThermopolis. US 20 joinsUS 26 inShoshoni, where it turns east and continues all the way throughCasper. From Casper, US 20/US 26 parallelsInterstate 25 (I-25) andUS 87 for 26 miles (42 km), until all four link up together just southeast ofGlenrock. I-25/US 20/US 26/US 87 stays combined toOrin, where US 20 turns east from I-25, at the western end ofUS 18. US 18/US 20run concurrently from Orin toLusk, where US 18 turns north and US 20 continues east into Nebraska.

Route description

[edit]

Yellowstone National Park

[edit]
US 14, US 16, and US 20 at the East Entrance of Yellowstone Park

Google Maps and other mapmakers may show US 20 and other U.S. Highways going throughYellowstone National Park;[2] however, they are officially discontinuous and unsigned inside the park.[3]

Unofficially, Google Maps marks the start of the western part of US 20, along withUS 191 andUS 287, at the state line nearWest Yellowstone, Montana. The road parallels theMadison River until a junction withUS 89.[4] The three routes then turn south along US 89 (Grand Loop Road), paralleling the Firehole River. Past Old Faithful, the four routes curve east before reaching the West Thumb of Yellowstone Lake. While the rest of the routes turn south, US 20 travels northeast along the lake. US 20 even leaves the Grand Loop Road at an intersection midway along the lake. This intersection also marks the western "terminuses" of US 14 and US 16. US 20 travels through for 65.8 miles (105.9 km) by the time it exits the park.[5]

Yellowstone–Nebraska state line

[edit]
US 20, US 26, and US 87 exiting I-25 in Casper

The eastern section of US 20 begins at the east entrance of Yellowstone National Park. US 20, along with US 14 and US 16, then meanders east along theShoshone River, heading towardWapiti,Buffalo Bill Reservoir, andCody.US 14A begins at Cody and continues to follow the river, while the three head straight to Greybull. Before Greybull, however,Wyoming Highway 789 (WYO 789) joins the concurrency. At Greybull, US 14 leaves the concurrency. At this point, the concurrency parallels theBighorn River. In Worland, US 16 turns east and leaves the concurrency. South of theBoysen Dam, the road runs along the eastern front of theBoysen Reservoir. In Shoshoni, US 20 turns east along US 26, while WYO 789 turns west along the same route.[6]

As US 20 and US 26 head toward Casper, the two routes travel along a limited-access road before traveling east along I-25 and US 87. US 20, US 26, and US 87 exit onto Beverly Street (exit 186) and travel east along Yellowstone Highway. Before reaching Glenrock, the three U.S. Highways are sandwiched between theNorth Platte River to the north and I-25 to the south. The three routes rejoins the interstate after Glenrock. US 20 leaves the freeway at Orin; this interchange is also where US 18 begins eastward. US 87 briefly joins the concurrency before US 20 turns east away from US 18/US 85. After passing throughVan Tassell, US 20 crosses the Nebraska state line.[6]

History

[edit]

US 20 became a U.S. Highway in 1926. Prior to 1940, it ended at Yellowstone National Park.[7] In 1940, it was extended westward toAlbany, Oregon;[8] however, as U.S. Highways are not formally designated in national parks such as Yellowstone, US 20 can be thought of as made up of two parts broken by Yellowstone National Park.[9]

Major intersections

[edit]
CountyLocationmi[1]kmExitDestinationsNotes
Yellowstone National Park0.0000.000East Entrance RoadContinuation into Yellowstone National Park;US 20 resumes in Montana at the park's west entrance
Yellowstone National Park boundary (East Entrance); fees required
Western end ofUS 14 andUS 16 overlaps
ParkPahaska Tepee2.0003.219Westbound road closure gate (closed winters)
Cody49.41079.518WYO 291 (South Fork Road)
51.87083.477

US 14A east /WYO 120 west –Powell,Big Horn Natl Rec Area		Western end of WYO 120 overlap
54.11987.096
WYO 120 south –Meeteetse,Thermopolis		Eastern end of WYO 120 overlap
Big Horn​85.056136.884WYO 30 –Burlington
Emblem85.665137.864WYO 32 –Powell,Lowell
​100.147161.171

US 310 west /WYO 789 north –Lovell		Western end of WYO 789 overlap
Greybull105.126169.184
US 14 east –Shell,Sheridan		Eastern end of US 14 overlap
​109.910176.883WYO 36 (Golf Course Road)
Basin112.765181.478WYO 30 –Burlington
​123.215198.295WYO 433
Manderson113.782183.114WYO 31 –Manderson,Hyattville
WashakieWorland143.029230.183
US 16 east –Buffalo		Eastern end of US 16 overlap; access toWashakie Medical Center
143.353230.704
 ToWYO 432 (Railroad Ave)
144.015231.770WYO 433
​151.982244.591

WYO 431 west /WYO 432 east
Hot Springs​164.032263.984WYO 175 –Kirby
​168.825271.698WYO 172 (Black Mountain Road)
Thermopolis176.083283.378WYO 120 –Meeteetse,Cody,Wyoming Dinosaur CenterAccess toHot Springs Memorial Hospital
​178.727287.633WYO 173 (Buffalo Creek Road)
​180.991291.277Eastbound road closure gate (weather depending)
Fremont​205.123330.113Westbound road closure gate (weather depending)
Shoshoni208.495335.540

US 26 west /WYO 789 south –Riverton		Eastern end of WYO 789 overlap; western end of US 26 overlap
209.053336.438Eastbound road closure gate (weather depending)
Moneta229.753369.752Eastbound road closure gate (weather depending)
Natrona​255.323410.903Waltman rest area
​295.633475.775Westbound road closure gate (weather depending)
Mountain View302.481486.796


US 20 Bus. /US 26 Bus. /WYO 257 toWYO 220 –Casper,Rawlins
​304.547490.121WYO 254 (Salt Creek Highway) – Casper Point of Entry
Casper305.360491.429189

I-25 north /US 87 north –Sheridan		Western end of I-25 and US 87 overlaps
306.267492.889188BPoplar Street (WYO 220)
306.682493.557188A

I-25 BL /US 87 Bus. east /WYO 255 south (Center Street)		No northbound entrance; western terminus of I-25 Bus./US 87 Bus.; WYO 255 unsigned
309.340497.834187McKinley Street
308.082–
308.415		495.810–
496.346		186
I-25 south –Cheyenne		Eastern end of I-25 overlap
Evansville309.431497.981

WYO 258 south (Curtis Street) toI-25
​312.244502.508


WYO 256 north /WYO 253 south toI-25
ConverseGlenrock330.088531.225
WYO 95 north –Rolling Hills
330.607532.060
I-25 BL west		Western end of I-25 BL overlap
​335.188539.433I-25 road closure gate (weather depending)
​335.438539.835160

I-25 north /I-25 BL ends –Casper		Western end of I-25 overlap; eastern end of I-25 BL overlap
​340.130547.386156Bixby Road
​342.071550.510154Barber Road
​345.142555.452151Ayres Natural Bridge
​345.866556.617150Inez Road
​350.305563.761146
WYO 96 east (La Prele Road)
Douglas356.207573.260140

I-25 BL south (US 20 Bus. /US 26 Bus. /US 87 Bus.) toWYO 59 –Douglas,Gillette
360.836580.709135
I-25 BL north (US 20 Bus. /US 26 Bus. /US 87 Bus.) –Douglas
Orin369.841595.201126



I-25 south /US 26 east /US 87 south /US 18 begins –Glendo		Eastern end of I-25, US 26, and US 87 overlaps; western end of US 18 overlap
​371.659598.127
WYO 319 south
Eastbound road closure gate (weather depending)
Niobrara​401.555646.240Westbound road closure gate (weather depending)
Manville402.546647.835WYO 270 –Manville,Lance Creek,Guernsey
​409.535659.083Westbound road closure gate (weather depending)
​410.055659.920Lusk rest area
Lusk410.356660.404
WYO 273 north
411.649662.485
US 85 south –Torrington		Southern end of US 85 overlap
412.145663.283

US 18 east /US 85 north –Newcastle		Eastern end of US 18 overlap; northern end of US 85 overlap
412.615664.039Eastbound road closure gate (weather depending)
​434.003698.460
US 20 east –Harrison		Continuation into Nebraska
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References

[edit]
  1. ^abState Maintenance Engineer’s Office (October 1, 2017)."Maintenance Section Reference Book"(PDF).Wyoming Department of Transportation. RetrievedMay 31, 2021.
  2. ^"Yellowstone National Park" (Map).Google Maps. RetrievedJanuary 1, 2023.
  3. ^National Park Service (July 2022).Yellowstone National Park(PDF) (Map). National Park Service. p. 1. RetrievedJanuary 1, 2023.
  4. ^"West Yellowstone, Montana" (Map).Google Maps. RetrievedJuly 15, 2022.
  5. ^"US 20 at Yellowstone" (Map).Google Maps. RetrievedJuly 15, 2022.
  6. ^ab"Overview Map of US 20 (WY; non-Yellowstone)" (Map).Google Maps. RetrievedJuly 15, 2022.
  7. ^Bureau of Public Roads &American Association of State Highway Officials (November 11, 1926).United States System of Highways Adopted for Uniform Marking by the American Association of State Highway Officials (Map). 1:7,000,000. Washington, DC:United States Geological Survey.OCLC 32889555. RetrievedDecember 31, 2022 – viaWikimedia Commons.
  8. ^Executive Committee (June 3, 1940)."Addenda to Minutes of Executive Committee"(PDF) (Report). Washington, DC: American Association of State Highway Officials. RetrievedDecember 31, 2022 – via Wikimedia Commons.
  9. ^Lew, Josh (February 5, 2021)."Take a Classic Road Trip on America's Longest Highway".Treehugger. RetrievedJuly 15, 2022.

External links

[edit]
Template:Attached KML/U.S. Route 20 in Wyoming
KML is not from Wikidata


U.S. Route 20
Previous state:
Montana		 WyomingNext state:
Nebraska
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