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Wyoming Highway 77
Old Shirley Basin Road
WYO 77 highlighted in red
Route information
Maintained by WYDOT
Length	22.18 mi (35.70 km)
Existed	Mid 1970s–present
Restrictions	Closed winters [1] [2]
Major junctions
South end	WYO 487 near Medicine Bow
North end	WYO 487 near Casper
Location
Country	United States
State	Wyoming
Counties	Carbon
Highway system
Wyoming State Highway System Interstate US State
← WYO 76 → WYO 78
← WYO 452 → 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

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

The entire route is in Carbon County.

Location	mi [1]	km	Destinations	Notes
​	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

See also

•   U.S. Roads portal

References

External links

Wikimedia Commons has media related to Wyoming Highway 77.

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