South Dakota Highway 34

Highway 34 marker
Highway 34
Route of SD 34 (in red)
Route information
Maintained by SDDOT
Length419.010 mi[1][2][3][4] (674.331 km)
Existed1926–present
Tourist
routes
Lewis and Clark Trail
Native American Scenic Byway
Major junctions
West end WYO 24 at Wyoming state line
Major intersections
East end MN 30 at Minnesota state line
Location
CountryUnited States
StateSouth Dakota
CountiesButte, Lawrence, Meade, Ziebach, Haakon, Stanley, Hughes, Hyde, Buffalo, Jerauld, Sanborn, Miner, Lake, Moody
Highway system
  • South Dakota State Trunk Highway System
SD 32 SD 35

South Dakota Highway 34 (SD 34) is a state route that runs parallel to Interstate 90 across the entire state of South Dakota. It begins at the Wyoming border west of Belle Fourche, as a continuation of Wyoming Highway 24 (WYO 24). The eastern terminus is at the Minnesota border east of Egan, or southwest of Airlie, Minnesota, where it continues as Minnesota State Highway 30 (MN 30). It is just over 419 miles (674 km) in length, making it the longest state highway in South Dakota.

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