South Dakota Highway 71

Highway 71
Highway 71
Cascade Road
	SD highlighted in red
Route information
	Maintained by SDDOT
Length	34.535 mi (55.579 km)
Existed	1962–present
Major junctions
South end	N-2 / N-71 northwest of Crawford, NE
North end	; US 18 Byp. in Hot Springs
Location
Country	United States
State	South Dakota
Counties	Fall River
Highway system
	South Dakota State Trunk Highway System; Interstate; US; State;

South Dakota Highway 71 (SD 71) is a 34.535-mile (55.579 km) state highway in Fall River County, South Dakota, United States, that travels from the Nebraska state line (where it continues as N-2/N-71 through the Black Hills National Forest) to U.S. Route 18 Bypass (US 18 Byp.) in Hot Springs. It is part of a triple state highway serving South Dakota, Nebraska, and Colorado.

Route description

SD 71's southern terminus is at the Nebraska border in Black Hills National Forest where it has the same number.^[2]

In the forest, the route meets the terminus of South Dakota Highway 471. After that, it leaves the forest and ends at US 18 Byp. in Hot Springs.^[3]

The road was originally commissioned in 1936 as part of South Dakota Highway 87. Part of that highway was given the SD 71 designation in 1962.

The entire highway is in Fall River County.

Location	mi^[1]	km	Destinations	Notes
Unorganized Territory of Southwest Fall River	0.000	0.000	N-2 south / N-71 south – Crawford	Continuation beyond Nebraska state line
	7.816	12.579	SD 471 north – Edgemont	Southern terminus of SD 471
Hot Springs	34.535	55.579	US 18 Byp. (Indianapolis Avenue) – The Mammoth Site, Civic Center	Northern terminus of SD 71
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

^ ^a ^b "State Highway Log: Rapid City Region" (PDF). South Dakota Department of Transportation. February 7, 2020. pp. 72–73. Retrieved June 2, 2021.
^ "Hot Springs, South Dakota" (Map). Google Maps. Retrieved February 5, 2014.
^ "Nebraska–South Dakota State Line" (Map). Google Maps. Retrieved February 5, 2014.

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