Wyoming Highway 77

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Wyoming Highway 77

Old Shirley Basin Road
WYO 77 highlighted in red
Route information
Maintained by WYDOT
Length22.18 mi (35.70 km)
ExistedMid 1970s–present
RestrictionsClosed winters[1][2]
Major junctions
South end WYO 487 near Medicine Bow
North end WYO 487 near Casper
CountryUnited States
Highway system
  • Wyoming State Highway System
WYO 76 WYO 78
WYO 452WY-487.svg WYO 514

Wyoming Highway 77 (WYO 77) is a 22.18-mile (35.70 km) long Wyoming state highway in northeastern Carbon County. The highway begins at WYO 487 and proceeds north, parallel to the highway, to a northern terminus at WYO 487.

Route description

View atop Highway 77's highest point looking north.

Highway 77 begins at Highway 487, 22 miles (35 km) north of Medicine Bow to Highway 487 near the Shirley Basin Rest Area, which is located 27 miles (43 km) south of Highway 487's junction with Highway 220. Highway 77 stays to the west of Highway 487 and Shirley Basin, acting as an alternative route to Highway 487 between the two points. At its northern terminus, Highway 77 is about 48 miles (77 km) south of the city of Casper.

The entirety of Highway 77 maintains a speed limit of 65 miles per hour (105 km/h), and is closed during winters.[1][2]

Major intersections

Highway 77

The entire route is in Carbon County.

0.000.00 WYO 487 – Casper, Medicine BowSouthern terminus
22.1835.70 WYO 487 – Casper, Shirley BasinNorthern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ a b c Google (February 17, 2014). "Wyoming Highway 77" (Map). Google Maps. Google. Retrieved February 17, 2014.
  2. ^ a b Official State Highway Map of Wyoming (Map). Wyoming Department of Transportation. 2014.

External links