South Dakota Highway 71

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Highway 71
Cascade Road
SD  highlighted in red
Route information
Maintained by SDDOT
Length	34.535 mi[1] (55.579 km)
Existed	1962–present
Major junctions
South end	N-71 / N-2 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
← SD 65 → SD 73

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.