South Dakota Highway 377

Highway 377
Location of SD 377 (in red)
Route information
Maintained by SDDOT
Length	2.173 mi[1] (3.497 km)
Existed	1976–present
Major junctions
South end	SD 44 in Interior
North end	Interior Entrance Station in Badlands National Park
Location
Country	United States
State	South Dakota
Counties	Jackson
Highway system
South Dakota State Trunk Highway System Interstate US State
← SD 365 → US 385

South Dakota Highway 377 (SD 377) is a 2.173-mile-long (3.497 km) state highway in Jackson County, South Dakota, United States. It begins at an intersection with SD 44 in Interior, and travels in a northeasterly direction to its northern terminus at the Interior Entrance Station for Badlands National Park.