Wyoming Highway 487
|Shirley Basin Road|
|Maintained by WYDOT|
|Length:||71.56 mi (115.16 km)|
|Existed:||Mid 1970's – present|
|South end:||US 30 / US 287 in Medicine Bow|
| WYO 77
|North end:||WYO 220|
Wyoming Highway 487 begins its south end at US 30/US 287 (Old Lincoln Hwy.) in Medicine Bow. WYO 487 travels north towards Shirley Basin and intersects WYO 77 at 22.1 miles (35.6 km), that route's southern terminus. Again WYO 487 intersects WYO 77 at its north end, but at 45 miles (72 km). WYO 487 travels another 27 miles (43 km) to its north end at Wyoming Highway 220 which is located 11 miles (18 km) NE of Alcova and 19 miles (31 km) SE of Evansville.
Wyoming Highway 75 was created during the early 1970s with the inception of the Wyoming secondary state route system. Highway 75 was routed along the path of present day Wyoming Highway 487 between the two junctions of current Wyoming Highway 77 in Shirley Basin. When Wyoming 487 was rerouted over Highway 75, old WYO 487 was recommissioned as WYO 77, and WYO 75 was decommissioned. The renumbering occurred in the mid-1970s.
||Medicine Bow||0.00||0.00||US 30 / US 287||Southern Terminus of WYO 487|
|22.1||35.6||WYO 77||Southern Terminus of WYO 77|
|45.0||72.4||WYO 77||Northern Terminus of WYO 77|
||71.56||115.16||WYO 220||NorthernTerminus of WYO 487|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi
- Official 2003 State Highway Map of Wyoming