U.S. Highway16 (US16) 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 Interstate90 (I-90)/US14, concurrent with I-190, in Rapid City. The western terminus is the east entrance to Yellowstone National Park, concurrent with US14 and US20. US16 used to extend all the way to Michigan but has been truncated in favor of I-90 and I-96.

Route description

Lengths
mikm
WY419674
SD71114
Total490790

Wyoming

US16 begins at the east entrance to Yellowstone National Park, along with US14 and the eastern segment of US20. From the park, the three highways run concurrently to Cody and Greybull. In Greybull, US14 splits off to the east, while US16/US20 heads due south to Basin and Worland. In Worland, US16 splits off from US20 and heads east over Powder River Pass on its way to the city of Buffalo. After passing Buffalo, US16 arches north to the community of Ucross, meeting US14 again, before arching back south to Gillette. US16 then runs east concurrently with I-90 between Gillette and Moorcroft before heading southeast to the towns of Upton and Newcastle. The highway then heads east to the South Dakota state line. For most of the way through the state, the highway is a two-lane road. US16 is 419 miles (674km) long in Wyoming.

South Dakota

US16 is also known as Mount Rushmore Road in western South Dakota. From the state line, the highway travels near Jewel Cave, the fifth longest cave in the world. The highway goes through the city of Custer and shares alignment with US385. East of Hill City, US16 splits off US385. It then becomes a four-lane divided highway, with the two roadways separated by up to a half-mile (0.80km) in some places, including the old gold-mining town of Rockerville, which is contained entirely between the two roadways. In Rapid City, a truck bypass runs along Catron Boulevard and Elk Vale Road up to exit61 on I-90. US16 is 71 miles (114km) long in South Dakota.

The South Dakota section of US16 is defined at South Dakota Codified Laws § 31-4-138.

History

US 16 in the Tensleep Canyon, Bighorn Mountains, Wyoming

US16 originally connected Detroit with Yellowstone National Park, including a ferry link across Lake Michigan between Muskegon, Michigan, and Milwaukee, Wisconsin aboard SS Milwaukee Clipper. In Michigan, the route was in use long before automobiles and was known to white settlers as the Grand River Road, and prior to the designation of U.S. Highways in 1926, had been designated as M-16 in the 1920s from Detroit to south of Muskegon. In 1938, reflectorized discs were placed on US16 every 100 feet (30m) from Detroit to Lansing, resulting in fewer nighttime traffic accidents. Other states would later do the same on their roads.

US16 initially crossed the South DakotaWyoming state line west of Spearfish. U.S. Highway216 (US216) was commissioned in 1930 as a loop off US16 to the south between Rapid City and Moorcroft, crossing the state line west of Custer. In 1934, US16 was moved to the US216 alignment, while the former US16 became part of an extension of US14.

In Michigan, most of US16 was superseded by I-96 and a segment of Grand River Avenue in Detroit ultimately became M-5. US16 was later decommissioned in Wisconsin, Minnesota, and eastern South Dakota to its present termini.

Between Rapid City and Dexter, Minnesota, it has been supplanted by I-90. In Faribault County, Minnesota, the highway took on another number as there was already a county highway numbered 16. Residents of the county continued referring to the road as "16" or "old 16" and eventually the county renumbered it as County Road16 (CR16). From the county's western border with Martin County, US16 continued east through the city of Blue Earth as part of 1st Street and Leland Parkway until it briefly combines with US169/Grove Street. One-half mile (0.80km) south of that point at the intersection of Grove and 7th streets, CR16 followed 7th Street and continued east to the border of Freeborn County. Most of the stretch through Faribault County was a relatively narrow two-lane highway with wide gravel shoulders that has been widened at least two times since US16 was decommissioned. East of Dexter, it is now Minnesota State Highway 16 and State Trunk Highway16 in Wisconsin. In South Dakota, it was replaced by various state highways (including South Dakota Highway 38, or SD38, and SD248) and county roads: generally, in West River, the old alignment was transferred to county responsibility entirely, while, in East River, it remained a state-maintained highway.

An older US16A in South Dakota has become SD240.

In South Dakota in 2009, the South Dakota Department of Transportation designated US16/US385 between Custer and Hill City, which passes by the Crazy Horse Memorial, now being carved in the Black Hills, as the Crazy Horse Memorial Highway. This segment of US385 is also a part of the George Hearst Memorial Highway.

Major intersections

Mileage resets at the state line crossing.

StateCountyLocationmikmExitDestinationsNotes
WyomingParkYellowstone National Park0.0000.000East Entrance Road (to US20 west)Continuation into Yellowstone National Park; US20 resumes in Montana at the park's west entrance (closed winters)
Yellowstone National Park boundary (East Entrance); fees required
US14 begins/ US20 begins/ Buffalo Bill Cody Scenic Byway beginsUS14/ US16 western terminus; western end of US14/ US20/ Buffalo Bill Cody Scenic Byway concurrency
Pahaska Tepee2.0003.219Westbound road closure gate (closed winters)
Cody49.41079.518WYO291 south (South Fork Road)
50.90081.916US14A east/ WYO120 west (16th Street)/ Buffalo Bill Cody Scenic Byway ends– Powell, Big Horn Natl Rec AreaWest end of WYO120 and Buffalo Bill Cody Scenic Byway concurrency
54.11987.096WYO120 south– Meeteetse, ThermopolisEast end of WYO120 concurrency
Big Horn85.065136.899WYO30 south– Burlington
Emblem85.665137.864WYO32 north– Powell, Lovell
99.197159.642US310 west/ WYO789 north– Lovell, Billings, Bighorn Canyon Natl Recreation AreaWest end of WYO789 concurrency; US310 eastern terminus
101.530163.397Airport Rest Area
Greybull104.176167.655US14 east (Greybull Avenue)– Shell, SheridanEast end of US14 concurrency
108.960175.354WYO36 south (Golf Course Road)
Basin111.815179.949WYO30 south (C Street)– Burlington
122.265196.766WYO433 south
Manderson122.832197.679WYO31 Spur east– Manderson, HyattvilleOfficially WYO31 Spur; signed as WYO31
123.436198.651WYO31 eastUnsigned
WashakieWorland142.079228.654US20 west/ WYO789 south (Big Horn Avenue)– Thermopolis, Hot Springs State ParkEast end of US20/ WYO789 concurrency
Ten Sleep168.500271.174WYO434 south– Big Trails
172.117276.995WYO436 south
175.978283.209WYO435 east
176.079283.372Eastbound road closure gate (weather depending)
191.489308.172Eastbound road closure gate (weather depending)
Johnson197.500317.845Powder River Pass
205.566330.826Westbound road closure gate (weather depending)
230.069370.260Westbound road closure gate (weather depending)
Buffalo233.988376.567I-25 BL south/ US87 Bus. south (Main Street)– CasperSouth end of I-25 BL/ US87 Bus. concurrency
234.395377.222I-25 BL north/ I-90 BL west (Main Street)/ US87 Bus. northNorth end of I-25 BL/ US87 Bus. concurrency; south end of I-90 BL concurrency
234.990378.180I-25/ US87Sheridan, CasperI-25 exit 299
236.517380.637I-90/ I-90 BL ends– Sheridan, GilletteI-90 exit 58; east end I-90 BL concurrency
236.695380.924Eastbound road closure gate (weather depending)
SheridanUcross252.255405.965US14 west– SheridanWest end of US14 concurrency
279.196449.322WYO341 south– Arvada
Campbell319.685514.483Eastbound road closure gate (weather depending)
322.648519.252WYO59 north– BroadusWest end of WYO59 concurrency
Gillette329.930530.971WYO50 south/ I-90 BL west (Skyline Drive) to I-90Buffalo, MoorcroftWest end of BL90 concurrency
331.731533.869WYO59 south to I-90DouglasEast end of WYO59 concurrency
333.053535.997128I-90 west/ I-90 BL ends/ WYO51 east– BuffaloEast end of BL90 concurrency; west end of I-90 concurrency; exit numbers follow I-90
334.586538.464129Garner Lake Road
338.473544.719132Wyodak Road
346.806558.130141Rozet
CrookMoorcroft358.981577.724153I-90 east/ I-90 BL begins– SundanceEast end of I-90 concurrency; west end of BL90 concurrency
359.118577.944WYO51 west
360.186579.663US14 east– Devils Tower, Hulett, Pine HavenEast end of US14 concurrency
360.384579.982I-90 BL east to I-90East end of BL90 concurrency
360.686580.468Eastbound road closure gate (weather depending)
WestonUpton380.013611.572WYO116 north– SundanceWest end of WYO116 concurrency
380.317612.061WYO116 southEast end of WYO116 concurrency
380.986613.138Upton Rest Area
Osage393.479633.243WYO451 west (Oil City Road)
405.786653.049Westbound road closure gate (weather depending)
405.452652.512WYO450 west
Newcastle407.127655.207US16 Byp. east
408.955658.149US16 Byp. west
409.606659.197US85Sundance, Lusk
413.790665.930Eastbound road closure gate (weather depending)
418.8740.00674.1120.00Wyoming–South Dakota state line
South DakotaCusterCuster26.4642.58US385 south/ SD 89 south– Wind Cave National Park, Hot SpringsWest end of US385/ SD89 concurrency
26.9643.39US16A east/ SD 89 north– Custer State ParkEast end of SD89 concurrency
Pennington37.4960.33SD 87 south (Needles Highway)/ Peter Norbeck Scenic BywaySylvan Lake, Custer
37.6960.66SD 244 east/ Peter Norbeck Scenic BywayMount Rushmore
Hill City40.5165.19US16 Truck east/ US385 Truck north
41.0666.08US16 Truck west/ US385 Truck south
Three Forks45.0072.42US385 north– Deadwood, LeadEast end of US385 concurrency
Keystone Wye50.6081.43US16A west– Keystone, Mount RushmoreDirectional-T interchange
55.42– 56.1989.19– 90.43RockervilleInterchange; left exits and entrances
Rapid City64.19103.30US16 Truck east to I-90/ Catron BoulevardFuture single-point urban interchange (SPUI)
68.77– 68.85110.67– 110.80I-90 BL (St. Joseph Street/ Main Street)One way pair
68.98111.01SD 44 east (Omaha Street)West end of SD44 concurrency
69.20111.37SD 44 east (Omaha Street) I-190 begins/ West BoulevardEast end of SD44 concurrency; west end of I-190 concurrency; I-190 southern terminus; exit numbers follow I-190
69.57111.961CNorth Street– Civic Center
70.64113.681A–1BI-90/ I-190 ends/ US14/ SD 79Gillette, Sioux FallsTrumpet interchange; US16 eastern terminus; I-190 northern terminus; east end of I-190 concurrency; signed as exits 1A (west) and 1B (east); I-90 exit57
1.000mi = 1.609km; 1.000km = 0.621mi Concurrency terminusTolledRoute transition

See also

Related routes

Special and suffixed routes

Notes

External links