U.S. Route 14, an east–west route, is one of the original United States highways of 1926. It currently has a length of 1,398 miles (2,250 km), but it had a peak length of 1,429 miles (2,300 km). For much of its length, it runs roughly parallel to Interstate 90.
The Cheyenne River, also written Chyone, referring to the Cheyenne people who once lived there, is a tributary of the Missouri River in the U.S. states of Wyoming and South Dakota. It is approximately 295 miles (475 km) long and drains an area of 24,240 square miles (62,800 km2). About 60% of the drainage basin is in South Dakota and almost all of the remainder is in Wyoming.
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. U.S. 16 used to extend all the way to Michigan, but has been truncated in favor of Interstates 90 and 96.
U.S. Route 18 is an east–west U.S. highway in the Midwestern United States. The western terminus is in Orin, Wyoming at an interchange with Interstate 25. Its eastern terminus is in downtown Milwaukee, Wisconsin. However, US 18 runs concurrent with other U.S. routes from its western terminus to Mule Creek Junction, Wyoming. US 18 is one of the original United States highways of 1926. The US 18 designation was originally proposed for a road in Michigan from Grand Haven east to Detroit. This roadway was eventually designated as U.S. Route 16.
Rockerville is a small unincorporated community in Pennington County in the Black Hills of the U.S. state of South Dakota. Originally established as a mining camp, it was named for the "rockers" which were used to separate placer gold from stream gravel.
Sheridan Lake, a reservoir, is located on Spring Creek in Pennington County, South Dakota. Built over the site of Sheridan, the first county seat, it is owned and operated by the United States Forest Service and is one of the recreational areas of the Black Hills National Forest.
South Dakota Highway 44 (SD 44) is a state highway in southern South Dakota that runs from U.S. Route 385 (US 385) west of Rapid City to Interstate 29 (I-29) south of Sioux Falls. It is just more than 379 miles (610 km) long.
Keystone Wye is an interchange of U.S. Route 16 (US 16) and US 16A located in the Black Hills of South Dakota, featuring two unique structural glued laminated timber bridges. The Keystone Wye is a three-level Directional T interchange for the two divided highways, constructed in 1967-1968 as part of a project by the South Dakota Department of Transportation (SDDOT) to convert US 16 to a four-lane highway between Rapid City and Keystone. It was designed by Clyde Jundt and Kenneth C. Wilson.
U.S. Route 16A is a 36.971-mile-long (59.499 km) scenic United States highway. It is an alternate route for US 16. It splits from US 16 in the Black Hills of the southwestern part of the U.S. state of South Dakota. The highway's western terminus is an intersection with US 16, US 385, and South Dakota Highway 89 (SD 89) in Custer, South Dakota. The eastern terminus is at an interchange with US 16 called the Keystone Wye south of Rapid City, South Dakota. Portions of US 16A are known as the Iron Mountain Road.
South Dakota Highway 87 (SD 87) is a 37.894-mile-long (60.984 km) state highway in the southwestern part of the U.S. state of South Dakota. It travels through the Black Hills region. The highway's southern terminus is at an intersection with U.S. Route 385 (US 385), about 6 miles (9.7 km) southeast of Pringle, within the southwestern part of Wind Cave National Park. Its northern terminus is at an intersection with US 16/US 385 about 3 miles (4.8 km) south-southwest of Hill City, within the east-central part of the Black Hills National Forest.
Interstate 25 (I-25) is a part of the Interstate Highway System that runs from Las Cruces, New Mexico, to Buffalo, Wyoming. In Wyoming, the Interstate Highway runs 300.530 miles (483.656 km) from the Colorado state line near Cheyenne north to its national terminus at I-90 near Buffalo. I-25 connects Wyoming's largest city and capital, Cheyenne, with its second largest city, Casper, and the smaller communities of Wheatland, Douglas, and Buffalo. The highway also connects those cities with Denver and Billings via I-90. I-25 runs concurrently with U.S. Route 87 (US 87) for almost its entire course in Wyoming. The highway also has extensive concurrencies with US 20 and US 26 along its east–west segment through the North Platte River valley. The Interstate has business loops through Cheyenne, Chugwater, Wheatland, Douglas, Glenrock, Casper, and Buffalo.
U.S. Highway 20 is a part of the United States Numbered Highway System that runs for 3,365 miles (5,415 km) from Newport, Oregon to Boston, Massachusetts. Within the State of Nebraska it is a state highway that begins on the Wyoming–Nebraska state line west of Harrison near the Niobrara River and runs to the Nebraska–Iowa state line in South Sioux City. Throughout its 431.60-mile (694.59 km) length the route passes through a diverse range of landscapes including bluffs and escarpments in the Northwest Panhandle, the Nebraska Sandhills in the northern part of the state, and rolling hills and plains as the highway approaches the Missouri River valley south of Sioux City, Iowa. Throughout its length, US 20 is a two-lane highway with the exception of the easternmost 8.45 miles (13.60 km) which is four-lane divided highway, the last 3.21 miles (5.17 km) of which is concurrent with Interstate 129. The 197 miles (317 km) between the Wyoming border and Valentine is designated as the Bridges to Buttes Byway, one of nine scenic byways in the state of Nebraska.
U.S. Route 89 in the U.S. state of Utah is a north–south United States Highway spanning more than 502 miles (807.891 km) through the central part of the state, making it the longest road in Utah. Between Provo and Brigham City, US-89 serves as a local road, paralleling Interstate 15, but the portions from Arizona north to Provo and Brigham City northeast to Wyoming serve separate corridors. The former provides access to several national parks and Arizona, and the latter connects I-15 with Logan, the state's only Metropolitan Statistical Area not on the Interstate.
South Dakota Highway 244 (SD 244) is a short state highway located entirely within Pennington County, South Dakota which provides access to Mount Rushmore. Highway 244 runs generally east–west between its eastern terminus at US 16A near Keystone and its western terminus at US 16/US 385 south of Hill City. The entire route is part of the Peter Norbeck Scenic Byway. SD 244 does not connect to its parent route.
Maverick Junction, South Dakota, United States, is an unincorporated community and census-designated place (CDP) located in Fall River County at the intersection of South Dakota Highway 79 and US Highways 18 and 385, approximately five miles southeast of Hot Springs. The population was 46 at the 2020 census.
Mule Creek Junction is a former community in Niobrara County, Wyoming at the junction of US 18 and US 85.
At least 12 special routes of U.S. Route 16 have existed, including four in Michigan.
Sisters State Park is a state park located at the southeast side of the town of Sisters in Deschutes County, Oregon, United States. The park property is bisected by U.S. Route 20 and Oregon Route 126, creating three separate parcels. The park covers 28 acres (11 ha) of undeveloped forest land along Whychus Creek. It is adjacent to two developed city parks that were once part of the state park. Sisters State Park is administered by the Oregon Parks and Recreation Department.
U.S. Route 385 (US 385) is a part of the United States Numbered Highway System that travels from Big Bend National Park in Texas to US 85 in Deadwood, South Dakota. Within the state of Nebraska, the highway is known as the Gold Rush Byway, one of nine scenic byways across the state. The highway follows along the old Sidney-Black Hills trail which played a crucial role during the Black Hills Gold Rush in the late 1870s. It served as the primary route to transport gold and mining gear between Sidney, Nebraska and the Black Hills to the north. Today, the highway enters Nebraska in the southeastern portion of the Nebraska Panhandle on the state line with Colorado northeast of Julesburg and continues in a northerly direction to the South Dakota state line north of Chadron.
U.S. Highway 16 (US 16) is a 69-mile-long (111 km) east–west U.S. Highway in the western part of the U.S. state of South Dakota. It travels between Yellowstone National Park in Wyoming and Rapid City. In South Dakota, the highway extends from the Wyoming state line near Newcastle, Wyoming to Interstate 90 (I-90) in Rapid City.
US 16 & 
US 385 
