U.S. Route 16 in South Dakota

U.S. Highway 16
Current US 16 highlighted in red
Route information
Maintained by SDDOT
Length	69.00 mi[1] (111.04 km)
Existed	1926–present
Major junctions
West end	US 16 at Wyoming state line
Major intersections	US 385 / US 16A in Custer US 385 in Three Forks US 16A near Keystone SD 44 in Rapid City
East end	I-190 / I-90 in Rapid City
Location
Country	United States
State	South Dakota
Counties	Custer, Pennington
Highway system
United States Numbered Highway System List Special Divided South Dakota State Trunk Highway System Interstate US State
← SD 15 → SD 16

U.S. Highway 16 (US 16) is a 69-mile-long (111 km) east–west United States Numbered Highway in the western part of the state of South Dakota. It travels between Yellowstone National Park near Newcastle, Wyoming and Interstate 90 (I-90) in Rapid City.