U.S. Route 16 in South Dakota

U.S. Route 16
US 16 highlighted in red
Route information
Length:	540 mi (869 km)
Existed:	1926 – present
Major junctions
West end:	US 14 / US 20 at Yellowstone National Park entrance
	I-25 / US 87 in Buffalo, WY US 85 in Newcastle, WY US 16 Truck in Rapid City, SD
East end:	I-90 / I-190 / US 14 / US 16 Truck in Rapid City, SD
Location
States:	Wyoming, South Dakota
Highway system
United States Numbered Highway System List Special Divided Replaced ← WYO 14 WY US 18 → ← SD 15 SD SD 16 →

I-25 / US 87 in Buffalo, WY
US 85 in Newcastle, WY

U.S. Route 16 (US 16) is an east–west United States Highway between Rapid City, South Dakota and Yellowstone National Park in Wyoming.

As of 2004, the highway's eastern terminus is at a junction with Interstate 90/U.S. Route 14 (I-90/US 14), concurrent with I-190, in Rapid City, South Dakota. The western terminus is the east entrance to Yellowstone National Park, concurrent with US 14 and US 20.