Historical Highway Shields
The Unofficial South Dakota Highways Page


Current Routes:

    SD-203
    SD-204
    US-212
    US-212P
    SD-224
    I-229
    LOOP I-229
    SD-235
    SD-239

    SD-240
    SD-244
    SD-247
    SD-248
    SD-249
    SD-251
    SD-253
    SD-258
    SD-262

    SD-271
    SD-273
    US-281
    SD-314
    US-324
    SD-377
    US-385
    SD-391
    SD-407

    SD-445
    SD-471
    SD-473
    BIA-802
    BIA-803
    BIA-808
    BIA-810
    SD-1804
    SD-1806


Historic Routes:

    SD-214
    US-216
    SD-218
    SD-230
    SD-232
    SD-236
    SD-238
    SD-245
    SD-264
    SD-296

    SD-298
    SD-365
    SD-423
    SD-435
    SD-437
    SD-439
    SD-439
    SD-443
    SD-514

Road Pages:

    Highways 1-30
    Highways 31-60
    Highways 61-100
    Highways 101-200
    Highways 201 +

Photos and Trip Reports

    SD Map Clips
    SD Pictures
    County by County

Exit Listings @
Highway Heaven

    I-29
    I-90
    I-190
    I-229

Neighboring States

    North Dakota
    Minnesota
    Iowa
    Nebraska
    Wyoming
    Montana

Contact

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Chris Geelhart
Last Update: 3/25/2007
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You are at: Northern Plains Highways > South Dakota Highways > SD 200-1806
SD-18 in 1932
What is now part of SD-20 across northern South Dakota was originally SD-18, as shown in this 1932 Standard Oil map clip of South Dakota. Also at the time, US-18 ran across southern parts of the state. By 1935, the state route became SD-8; whether this was done to avoid duplicate numbers is unknown.
Current Assignment Decommissioned 1950 or earlier Decommissioned 1951 to 1975 Decommissioned since 1975
Name Details
SD-203

Alignment: SD-258 to 1 mile north of SD-258, just east of Plankinton

Distance: 1 mile

History and Notes: SD-203 is an unmarked road, leading to a state training school.

SD-204 Alignment: SD-1804 to SD-1806 over the Oahe Dam north of Pierre

Distance: 1 mile

History and Notes: Formerly part of SD-514.

Attractions Along the Way: Oahe Dam (north of Pierre); Oahe Chapel (north of Pierre)

US-212
Sunset Trail

Short Cut West Highway

Native American Scenic Byway

Updated!
Alignment: Wyoming border (US-212) northwest of Belle Fourche to Minnesota border (US-212) south of Revillo

Distance: 412 miles

NHS: Entire Route

Intersecting Interstates: I-29 at Watertown

Multiplexing: Shared alignment with SD-79 for 3 miles south from Newell; with SD-73 for 3 miles west from Faith; with SD-63 for 3 miles either side of Eagle Butte; with SD-1804 for 4 miles east from the Missouri River; with US-83 for 1 mile, west of Gettysburg; with SD-47 from 1 mile south of Lebanon to 3 miles east of Seneca; with SD-45 from 5 miles east of Faulkton to 8 miles west of Rockham; with US-281 through Redfield; with SD-37 for 5 miles west from Doland; with SD-25 for 1 mile west of Henry; with SD-15 from Tunerville to 3 miles north and 2 miles east of Tunerville

Multi-lane Segments: SD-139 to I-29

Lewis and Clark Trail: US-83 to Missouri River

History and Notes: Previously known as the "Sunset Trail", US-212 was designated in 1926 along what had been SD-22. It was officially defined as follows: "Beginning at the Minnesota-South Dakota State line west of Dawson via Watertown, Clark, Redfield, Faulkton, Gettysburg, Dupree, Newell, to Bellefourche (sic)." The extension into Montana occurred in 1939.

New!The segment of US-212 from just west of Lake Oahe to SD-63 just west of Eagle Butte is part of the Native American Scenic Byway, which runs south to Chamberlain and north into North Dakota.

Attractions Along the Way: Ben Ash Monument (west of Maurine); Pickler Mansion (Faulkton); Faulk County Courthouse (Faulkton); Abbie Gardner Monument (north of Redfield); Fisher Grove State Park (Frankfort); Arthur Mellette House (Watertown)

Follow US-212 across: Montana, Wyoming, and Minnesota

US-212P Alignment: US-212 northeast of Belle Fourche to US-85 in Belle Fourche

History and Notes: An former alignment of US-212 before the bypass around the north side of town was built. May be marked as "Business" US-212.

Old SD-214

Alignment: Wendt to US-83 near Ft. Pierre

History and Notes: Decommissioned in 1991.

Old US-216

Alignment: Wyoming line west of Custer to Rapid City

History and Notes: A US route from 1933. This followed the present US-16 from the Wyoming line to Custer, ALT US-16 and SD-36 from Custer to Hermosa, and SD-79 north to Rapid City. The route continued into Wyoming, and existed there from 1930-1934.

Old SD-218

Alignment: I-29 at exit 127 to SD-13 west of Elkton

History and Notes: Old designation of the current SD-324, in effect 1976-1996. Much of this route is on an old US-14 alignment from before 1936.

SD-224

Alignment: Alpena to SD-37 south of Huron

Distance: 8 miles

History and Notes: Designated in 1976, replacing a segment of SD-32.

I-229

Exit Listings

Updated!

Alignment: I-29 on south side of Sioux Falls to I-90 on northeast side of Sioux Falls

Distance: 11.33 miles

Intersecting Interstates: I-90 and I-29, both in Sioux Falls

NHS: Entire length

History and Notes: Early (circa 1960) plans had I-29 and I-229 in Sioux Falls reversed; I-29 would continue due north from the current I-90/I-229 intersection, running a few miles east of its current alignment. It is unknown if I-229 was ever signed as I-29. This route was completed by 1962, and underwent little change until new exits were added at the north and southwest ends during the 1990's.

Updated! Attractions Along the Way: Great Plains Zoo and Delbridge Museum, Washington Pavilion of Arts and Sciences, USS South Dakota Memorial, Center for Western Studies, Sioux Empire Medical Museum, Old Courthouse Museum, Falls of the Big Sioux River (all in Sioux Falls)

Links: AARoads' I-229 Page, Kurumi's I-229 Page

BUSN I-229 Loop

Alignment: I-229 Exit 3 (SD-115, Minnehaha Ave) to I-229 Exit 6 (SD-42, 10th St) in Sioux Falls

Multiplexing: Shared alignment with SD-115 along Minnesota Ave (north-south segment), and with SD-42 along 10th/11th Sts (east-west segment)

History and Notes: Shield markers for this route in Sioux Falls use the word "Downtown" instead of "Business". The route intersects with Spur I-29 and Spur I-90 at 10th/11th Sts.

SD-230

Alignment: Segment 1: BYPASS US-16 near SD-44 on the east side of Rapid City to I-90 exit 61
Segment 2: I-90/US-14 at exit 63 to Box Elder

History and Notes: This was an unmarked state route, consisting of two segments in the Rapid City area, each 3 miles long (bypass US-16 near SD-44 to I-90 exit 61, and Box Elder to I-90 exit 63). It followed an old alignment of US-14 and US-16. It was decommissioned in 2006.

Old SD-232

Alignment: SD-79 to SD-44 in Rapid City

History and Notes: An unmarked state route, decommissioned in 1994.

SD-235 Shield

Alignment: I-90 at Elk Vale Rd (exit 61) on east edge of Rapid City, to jct. SD-79/Truck US-16 on south edge of Rapid City

Multi-Lane Segments: Entire route

Intersecting Interstates: I-90 at exit 61

History and Notes: SD-235 is the "Southeast Connector", with the majority of the construction work finished by late 2005. It absorbed the unmarked SD-437, and continued it southwest from the SD-44 intersection to intersect with SD-79 at the turnoff for Truck Bypass US-16.

SD-236

Alignment: SD-34 west of Madison to Lake Herman State Park

History and Notes: Served the Lake Herman State Park area west of Madison. It was decommissioned in 2006.

SD-238

Alignment: BYPASS US-16 on southeast side of Rapid City to SD-44 on the east side of Rapid City

History and Notes: This was an unmarked state route, leading to the Western Dakota Technical Institute. It was decommissioned in 2006.

SD-239

Alignment: Long Lake to SD-10/SD-45 south of Long Lake

Distance: 9 miles

History and Notes: Previously known as SD-101, this designation was implemented by 1976.

SD-240

Badlands Loop
Badlands Loop

Updated!

Alignment: I-90 at Wall to I-90 northeast of Interior

Distance: 40 miles

Intersecting Interstates: I-90 in Wall (twice) and northeast of Interior

History and Notes: "Badlands Loop". Runs through Badlands National Park (fee to drive on this road).

Former ALT US-16. The SD-240 number was assigned around 1980, after US-16 was truncated at Rapid City.

The northwest part of the road loops through Wall, following the Business I-90 alignment, thus intersecting I-90 twice.

Attractions Along the Way: Wall Drug (Wall); Badlands National Park; Buffalo Gap National Grasslands Visitors Center (Wall)

Updated! Links: Badlands Loop Scenic Byway

SD-244

Norbeck Byway
Norbeck Byway

Borglum Memorial Highway

Updated!

Alignment: US-16/ US-385 near St. Elmo Peak to ALT US-16 near Keystone

Distance: 12 miles

History and Notes: SD-244 is also known as the "Norbeck Byway". It is named after former U.S. Sen. Peter Norbeck, who introduced legislation in the 1920's to make Mount Rushmore a national monument.

This road had served as a segment of SD-87 in 1971, and was changed to SD-244 around 1977.

Nathan Barton passed along some history of SD-244:

My father helped build this alignment back in '67, when he was a seasonal employee with the Forest Service. It was actually part of a project called the "Forest Highway" which was to go from US 85 west of Cheyenne Crossing south through Mystic, Tigerville, and link up with another USFS paved highway from Deerfield on into Hill City, multiplex with US 16-385 to the present west terminus of 244, and then east to Mount Rushmore. It replaced an earlier (still gravel) road designed and built by Norbeck, then called the Horse Thief Lake Road. The remaining west end of that road, featuring an unusual divided highway with figure-8 at-grade and separated-grade crossings, is now called the Palmer Gulch Road and still appears (unlabeled) on SD DOT highway maps. The official name of SD-244 is the "Borglum Memorial Highway" after the carver of Mount Rushmore; as you probably mention in the Highway 16A segments, it is only a part of the Norbeck Byway. It is also worth noting that it is one of the few (if not the only) paved, State highways in the nation to actually form the boundary of a nationally-designated Wilderness Area, the Black Elk Wilderness Area, designated back in the late 1970s. This always comes as a surprise to people familiar with the Bob Marshall or the many areas in California or Colorado, where you have miles of gravel roads and dirt trails to traverse just to get to the boundary of the wilderness area.

Attractions Along the Way: Mt. Rushmore National Memorial (Keystone); Big Thunder Gold Mine (Keystone); Beautiful Rushmore Cave (Keystone)

Updated! Links: Mr. Yamamoto's SD-244 Page, Peter Norbeck Scenic Byway

Old SD-245

Alignment: SD-34 near Stephan to SD-34 southeast of Ft. Thompson

History and Notes: An old alignment of the SD-34/47 multiplex. The move of the multiplex to the west occurred between 1965 and 1971. This route was replaced in 1985 by a realignment and southward extension of SD-47.

SD-247

Alignment: SD-10 at Jct. SD-45 to US-12 at Roscoe

Distance: 23 miles

History and Notes: Designated in 1976.

SD-248

Alignment: Kadoka (SD-73) to Reliance (SD-47)

Distance: 100 miles

Multiplexes: Shared alignment with BUSN I-90 through Kadoka and Murdo

History and Notes: SD-248 is an unmarked state route, which follows the old US-16 alignment.

SD-249

Alignment: SD-47 at center of Ft. Thompson to SD-34 east of Ft. Thompson

Distance: Approximately 1 mile

History and Notes: A diagonal shortcut around the east side of Ft. Thompson, I discovered this in a review of SD state laws regarding each highway. I do not know how long it has been in existence.

SD-251

Alignment: Gregory (US-18) to Nebraska border north of Mills, NE

Distance: 16 miles

History and Notes: This route was first designated around 1980, and only extended 6 miles south of Gregory. It slowly expanded to the south, and currently extends to the state line.

Links: Mr. Yamamoto's SD-251 Page

SD-253

Alignment: SD-47 north of Bowdle to US-12 east of Bowdle

Distance: 20 miles

History and Notes: Designated in 1975, replacing SD-102.

SD-258

Alignment: Plankinton to US-281 east of Plankinton

Distance: 2 miles

History and Notes: This is an unmarked state route, following the old US-16 alignment through town. Rural street signs indicate the road is named "Highway 16".

SD-262

Alignment: Alexandria (I-90) to SD-42 southeast of Bridgewater

Distance: 17.5 miles

Multiplexing: Shared alignment with SD-25 for about 2.5 miles northwest from Emery

History and Notes: Formerly a part of US-16, and designated around 1980 when US-16 was rerouted onto I-90.

Links: Mr. Yamamoto's SD-262 Page

Old SD-264

Alignment: Brandon to Valley Springs

History and Notes: Designated around 1980, after US-16 was rerouted onto I-90. It was decommissioned in 1999.

SD-271

Alignment: North Dakota border north of Artas to US-12 south of Java

Distance: 37 miles

History and Notes: Designated around 1975; northern segment (north of SD-10) replaced SD-105.

SD-273

Alignment: I-90 at Kennebec to SD-1806 west of Lower Brule

Distance: 15 miles

History and Notes: Designated in 1976.

US-281

Alignment: North Dakota border (US-281) south of Ellendale, ND, to Nebraska border (US-281) west of Fort Randall Dam

Distance: 233 miles

Intersecting Interstates: I-90 at Plankinton

NHS: Wolsey to North Dakota border

Multiplexing: Shared alignment with SD-10 for 3 miles, between Frederick and Westport; with US-12 through the west side of Aberdeen; with US-212 through Redfield; with US-14 for 3 miles either side of Wolsey; with SD-44 for 3 miles between Corsica and Armour; with US-18 from 6 miles south of Armour to 15 miles southwest of Pickstown

Multi-lane Segments: Mellette to just south of Aberdeen.

History and Notes: Historical alignments of US-281:

  • 1932: Applied to what was SD-41. Segment between US-14 and the North Dakota line was in the same area as today. The road then went to Huron, and followed current SD-37 to 2 miles north of Tripp, ending at the US-18 junction.
  • By 1936: Route south of US-14 rerouted, extending from near Wolsey to Plankinton, then west to 6 miles east of Kimball, then south to the Nebraska border near Fairfax. Crossed the Missouri River near the old town of Wheeler (west of Lake Andes).
  • Between 1948 and 1953: With the pending completion of Fort Randall Dam and subsequent creation of Lake Francis Case, the crossing at Wheeler was abandoned. US-281 was rerouted from Plankinton to extend 2 miles east, then went south to Armour on what had been the remaining segment of SD-41. Route continued to SD-50, then multiplexed with US-18 west to Lake Andes, and southwest to cross the Missouri River at the new town of Pickstown. Route crossed into Nebraska near Fairfax, as previously been the case.
  • Around 1960: The Nebraska entrance of US-281 was moved about 9 miles east.

US-281 between Aberdeen and US-14 is slowly being increased to 4 lanes, as part of the Eastern Dakota Expressway project.

Attractions Along the Way: Dacotah Prairie Museum (Aberdeen); Abbie Gardner Monument (Redfield); Fort Randall (Pickstown); Fort Randall Dam (Pickstown)

Follow US-281 across: North Dakota, Nebraska, Kansas, Oklahoma, and Texas

Old SD-296

History and Notes: A review of South Dakota legislative statutes indicates that SD-296 was in northwest Turner County, between the county line and SD-17, but did not give more specifics. In any case, it was decommissioned in 1991.

Old SD-298

Alignment: Igloo to SD-471 northeast of Igloo

History and Notes: Formerly led to the Black Hills Ordnance Depot. Decommissioned in 1998.

SD-314

Alignment: SD-50 northwest of Yankton to SD-52 on the west side of Yankton

Distance: 4 miles

SD-324

Alignment: I-29 at exit 127 to SD-13 west of Elkton

Distance: 8 miles

History and Notes: Designated in 1997, replacing the SD-218 identifier.

Old SD-365

History and Notes: This route was listed among South Dakota legislative statutes, the latest of which only said it was from "US-18 north". In any event, it was decommissioned in 1995.

SD-377

Alignment: SD-240 to Interior (SD-44)

Distance: 2 miles

History and Notes: Runs through Badlands National Park. Designation changed from SD-40A in 1976.

Attractions Along the Way: Badlands National Park

US-385

Black Hills Hwy
Black Hills Loop Highway

Potash Hwy
Potash Highway

Hearst Memorial Highway

Heartland Expressway

Updated!

Alignment: US-85 at Pluma (Deadwood) to Nebraska border (US-385) south of Oelrichs

Distance: 125 miles

Multiplexing: Shared alignment with US-16 from 5 miles northeast of Hill City to Custer; with SD-89 from Custer to Pringle; with US-18 from Hot Springs to Oelrichs

History and Notes: When roads were named rather than numbered, this road was part of both the "Potash Highway" and the "Black Hills Loop Highway." It currently is named the "Hearst Memorial Highway", named for one of the original founders of the Homestake Mining Company. It was originally numbered as US-85E by 1931. By 1936, the Deadwood to Hot Springs segment became part of ALT US-85. Designation changed to the current US-385 in 1958, and was extended southeast to the Nebraska border, replacing that segment of SD-79.

Updated! US-385 south of the US-18/SD-79 junction is part of the future "Heartland Expressway", which will link Denver and Rapid City. Construction of this segment, widening to 4 lanes, is scheduled to begin in 2008 and continue through 2011.

Attractions Along the Way: Homestake Gold Mine (Lead); Crazy Horse Monument (north of Custer); Flintstones Bedrock City (Custer); Custer County 1881 Courthouse (Custer); Wind Cave National Park (north of Hot Springs); Cold Brook Dam (Hot Springs); Mammoth Site (Hot Springs)

Follow US-385 across: Nebraska, Colorado, Oklahoma, and Texas

Links: Dale Sanderson's END US-385 Page, Heartland Expressway homepage, AARoads' Corridor 14 (Heartland Expressway) information

SD-391

Alignment: US-18 in southeast Shannon County south to Nebraska border (NE-27

Distance: 3 miles

History and Notes: Replaced a SD-75 designation in 1975.

Links: Mr. Yamamoto's SD-391 Page

SD-407

Alignment: Pine Ridge (US-18) to Nebraska border (NE-87)

Distance: 2 miles

History and Notes: Designated in 1975.

Links: Mr. Yamamoto's SD-407 Page

Old SD-423

History and Notes: This was an unmarked state route, connecting New Underwood to I-90. It was previously numbered as SD-116 between 1965 and 1975. It was decommissioned in 1998.

Old SD-435

Alignment: Box Elder to I-90 exit 66

History and Notes: An unmarked state route, connecting Box Elder to I-90 near Ellsworth AFB. This route was decommmissioned in 1998.

SD-437

Alignment: I-90 Exit 61 northeast of Rapid City to SD-44 on the east edge of Rapid City

History and Notes: An unmarked state route, leading to the Western Dakota Technical Institute. It was decommissioned in 2005, and the new Southeast Connector (SD-235) absorbed this route.

Old SD-439

History and Notes: This route was indicated in a review of South Dakota legislative statutes. It was defined as being from SD-79 to Business I-90, which would put it somewhere in the Rapid City area. It was decommissioned in 1994.

Old SD-443

History and Notes: This route was indicated in a review of South Dakota legislative statutes. It was defined as running between SD-44 and SD-79, which would put it in Rapid City. It was decommissioned in 1990.

SD-445

Alignment: I-90 Exit 55 to SD-44, both on the west side of Rapid City

Distance: 4 miles

History and Notes: This is an unmarked state route.

SD-471

Alignment: Edgemont (US-18) to Rumford (SD-71)

Distance: 15 miles

Unpaved Segments: Provo to Rumford

History and Notes: Designation changed from SD-52 in 1976.

Links: Mr. Yamamoto's SD-471 Page

SD-473

Alignment: Bald Mountain Mine (southwest of Lead) to US-85/ALT US-14 southwest of Lead

Distance: 2.5 miles

Attractions Along the Way: Terry Peak (southwest of Lead); Black Hills Mining Museum (Lead)

Old SD-514

Alignment: Fort Pierre to Pierre via Oahe Dam

History and Notes: This was a "U" shaped route dating back to around 1965. In 1976, the east leg was redesignated as a segment of SD-1804, and the west leg as SD-1806. The segment across the Oahe Dam is currently SD-204.

BIA Hwy 802

Alignment: BIA-9 near the Ziebach/Dewey County line to the Cheyenne River

History and Notes: Part of the Bureau of Indian Affairs highway system; runs through the Cheyenne River Indian Reservation.

BIA Hwy 803

Alignment: BIA-9 near the BIA-8/BIA-19 junction to the Cheyenne River

History and Notes: Part of the Bureau of Indian Affairs highway system; runs through the Cheyenne River Indian Reservation.

BIA Hwy 808

Alignment: BIA-810 to Lake Oahe

History and Notes: Part of the Bureau of Indian Affairs highway system; runs through the Cheyenne River Indian Reservation.

BIA Hwy 810

Alignment: BIA-7 near Twin Buttes to Lake Oahe

History and Notes: Part of the Bureau of Indian Affairs highway system; runs through the Cheyenne River Indian Reservation.

SD-1804

Lewis and Clark Trail
Lewis and Clark Trail

Alignment: Segment 1:North Dakota border (ND-1804) northwest of Pollock to an unnumbered county road southeast of Glenham
Segment 2: 5 miles north of US-212 to Pierre (US-14/US-83)
Segment 3: SD-44/SD-50 west of Platte to an unnumbered county road east of the Platte Creek Recreation Area
Segment 4: SD-50 west of Lake Andes to Missouri River

Multiplexing: (Segment 1) Shared alignment with US-12 and SD-20 for 4 miles east from Mobridge. (Segment 2) Shared alignment with US-212 for 5 miles.

Lewis and Clark Trail: (Segment 1) North Dakota border to Mobridge. (Segment 2) US-212 to Pierre.

History and Notes: The segment from Pierre to the Oahe Dam was designated as SD-514 before being changed in 1976.

State routes 1804 and 1806 run in various segments along the east and west banks of the Missouri River, respectively. They were designated in 1976, and are numbered based on the years of Lewis and Clark's travels through the area. These numbers are also used in North Dakota.

Attractions Along the Way: Oahe Dam (north of Pierre); Oahe Chapel (north of Pierre); State Capitol (Pierre); South Dakota Discovery Center and Aquarium (Pierre); South Dakota National Guard Museum (Pierre); World War II Memorial (Pierre); South Dakota State Museum (Pierre)

Links: Lewis and Clark Trail information

SD-1806 Shield

Lewis and Clark Trail
Lewis and Clark Trail

Native American Scenic Byway

Updated!

Alignment: Segment 1: Kenel to Sacajawea Monument southwest of Mobridge
Segment 2: Stanely County Road 1102 south of Mission Ridge to SD-273
Segment 3: SD-44 near Snake Creek Rec. Area to unmarked county road 5 miles south
Segment 4: Whitestone Bay Rec. Area to Bonesteel (US-18)

Multiplexing: (Segment 1) Shared alignment with US-12 and SD-20 across the Grand River. (Segment 2) Shared alignment with US-14 and SD-34 through Ft. Pierre.

Lewis and Clark Trail: (Segment 1) Entire route. (Segment 3) Entire route.

History and Notes: State routes 1804 and 1806 run in various segments along the east and west banks of the Missouri River, respectively. They were designated in 1976, and the numbers are based on the years of Lewis and Clark's travels through the area. These numbers are also used in North Dakota.

New!The segment of SD-1806 from the North Dakota border to US-12, and also between Ft. Pierre and BIA-10, are part of the Native American Scenic Byway, which runs south to Chamberlain and north into North Dakota.

Attractions Along the Way: Sitting Bull's Grave (southwest of Mobridge); Sacajawea Monument (southwest of Mobridge); Oahe Dam (north of Pierre); Oahe Chapel (north of Pierre); Cultural Heritage Center (Pierre); Fort Defiance site (west of Lower Brule)

Links: Lewis and Clark Trail information