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Highway 89
Highway 89
	Route of SD 89 (in red)
Route information
	Maintained by SDDOT
Length	34.5 mi (55.5 km)
Existed	1950–present
Major junctions
South end	US 18 near Minnekahta
	US 385 in Pringle; US 16 / US 16A / US 385 in Custer;
North end	SD 87 in Custer State Park
Location
Country	United States
State	South Dakota
Counties	Fall River; Custer;
Highway system
	South Dakota State Trunk Highway System; Interstate; US; State;

South Dakota Highway 89 (SD 89) is a 34.5-mile (55.5 km) state highway in Fall River and Custer counties in South Dakota, United States, that travels from U.S. Route 18 (US 18) near Minnekahta to SD 87 in Custer State Park.^{[citation needed]} SD 89 is concurrent with US 385 from Pringle to Custer. The portion of the highway from Custer to SD 87 is part of the Peter Norbeck Scenic Byway.

Route description

SD 89 was established in 1950 from Spearfish to Minnekahta. The section from SD 87 to Spearfish was redesignated as US 14 Alternate and U.S. Forest Service roads. The section of SD 89 from Custer to Sylvan Lake was once part of US 85 Alternate and replaced in December 1952.^[3]

County	Location	mi^[1]^[2]	km	Destinations	Notes
Fall River		0.0	0.0	US 18 – Edgemont, Hot Springs, The Mammoth Site, George S. Mickelson Trail Burlington Route Minnekahta Trailhead	Southern terminus
Custer	Pringle	15.6	25.1	US 385 south – Hot Springs	South end of US 385 concurrency
	Custer	27.2	43.8	US 16 west (Mt. Rushmore Road) – Jewel Cave Natl. Monument	South end of US 16 concurrency
		27.7	44.6	US 16 east / US 385 north (North 5th Street) / US 16A begins	North end of US 16 and US 385 concurrencies; western terminus of US 16A; south end of US 16A concurrency
		28.4	45.7	US 16A east – Custer State Park Stockade Lake Entrance, Legion Lake	North end of US 16A concurrency
	Custer State Park	34.5	55.5	SD 87 (Needles Highway) – Park Entrance Station, Sylvan Lake, Harney Peak Trailhead, Sylvan Lake Lodge, Hill City	Northern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus

^ ^a ^b General Highway Map (PDF) (Map). Fall River County. South Dakota Department of Transportation. 2010. Retrieved December 19, 2011.
^ ^a ^b General Highway Map (PDF) (Map). Custer County. South Dakota Department of Transportation. 2010. Retrieved December 19, 2011.
^ "Several Hills Highways Given New Numbers". Deadwood Pioneer-Times. Deadwood, South Dakota. December 3, 1952. p. 1. Retrieved December 18, 2019 – via Newspapers.com.