 U.S. Route 16 | ||||||||||
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 US 16 highlighted in red | ||||||||||
| Route information | ||||||||||
| Length | 540 mi[citation needed] (870 km) | |||||||||
| Existed | 1926[citation needed]–present | |||||||||
| Major junctions | ||||||||||
| West end |   US 14 / US 20 at Yellowstone National Park entrance | |||||||||
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| East end |     I-90 / I-190 / US 14 / US 16 Truck in Rapid City, SD | |||||||||
| Location | ||||||||||
| Country | United States | |||||||||
| States | Wyoming, South Dakota | |||||||||
| Highway system | ||||||||||
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U.S. Highway 16 (US 16) is an east–west United States Numbered Highway between Rapid City, South Dakota, and Yellowstone National Park in Wyoming. The highway's eastern terminus is at a junction with Interstate 90 (I-90)/US 14, concurrent with I-190, in Rapid City. The western terminus is the east entrance to Yellowstone National Park, concurrent with US 14 and US 20. US 16 used to extend all the way to Michigan but has been truncated in favor of I-90 and I-96.