Wyoming Highway 77

Wyoming Highway 77
Old Shirley Basin Road
Route information
Maintained by WYDOT
Length:	22.18 mi (35.70 km)
Existed:	Mid 1970's – present
Restrictions:	Closed winters
Major junctions
South end:	WYO 487 near Medicine Bow
North end:	WYO 487 near Casper
Location
Counties:	Carbon
Highway system
State highways in Wyoming ← WYO 76 WYO 78 → ← x20px WYO 452 WYO 514 →

File:Wyoming 77.JPG

File:Shirley Rim.jpg

View atop Highway 77's highest point looking north.

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 Highway 487 and proceeds north, parallel to the highway, to a northern terminus at Highway 487.

Route description

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.

History

Wyoming Highway 77 was formerly numbered as Highway 487 while present day Highway 487 was designated as Highway 75. Highway 75 was created during the early 1970s with the creation of the Wyoming secondary state route system. When Highway 487 was rerouted over Highway 75 in the mid-1970s, old Highway 487 was redesignated as Highway 77.

Major intersections

County	Location	mi	km	Destinations	Notes
Carbon	​	0.00	0.00	WYO 487 – Casper, Medicine Bow	Southern terminus
	​	22.18	35.70	WYO 487 – Casper, Shirley Basin	Northern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

External links

• Wyoming Routes 000-099
• WYO 77 - WYO 487 to WYO 487