Idaho State Highway 51

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State Highway 51 marker

State Highway 51
Route information
Maintained by ITD
Length: 93.598 mi[1] (150.631 km)
Major junctions
South end: SR 225 near Owyhee, NV
 

SH-78

SH-67
North end: I‑84 Bus. at intersection with American Legion Blvd. in Mountain Home
Location
Counties: Owyhee, Elmore
Highway system

State Highways in Idaho

SH-50 SH-52

State Highway 51 (SH-51) is a state highway in southwestern Idaho from Mountain Home south to the Nevada border, where it continues as State Route 225 to Elko. It is the major north–south road in Owyhee County.[2]

As currently configured in the state's official milepoint log, SH-51 terminates at the BL-84 intersection with American Legion Blvd., and is not otherwise officially concurrent/overlaid with BL-84 (where the signs at I-84's Exits 90 and 99 say "To SH-51/To SH-67") or the former section of US-20 that follows American Legion Blvd. to I-84/US-20 east at Exit 95. As of February 2015, some map products such as Google Maps still show SH-51's former overlay with American Legion Blvd.[1]

Route description[edit]

View north from the south end of SH-51

SH-51's northern terminus is in the city of Mountain Home in Elmore County. After turning south from Airbase Rd. and the intersection with SH-67, the road crosses the Snake River into Owyhee County and passes through the towns of Bruneau, Grasmere, and Riddle. About 11.5 miles (18.5 km) from the state border it enters the Duck Valley Indian Reservation.

As the road crosses into Nevada it becomes State Route 225. The reservation's only major town, Owyhee is about 4 miles (6.4 km) south of the state border. After another 95 miles (153 km) through Elko County, SR 225 connects with Interstate 80 in Elko.

History[edit]

The basic route of today's SH-51 was in place as early as the 1930s, mostly as an all-weather gravel road from Mountain Home until it reached the northern boundary of the Duck Valley Indian Reservation, and as an unimproved road on through to the Nevada border and then-NV Route 11 as of the 1937 map.[3]

Major intersections and Points of Interest[edit]

County Location mi[1] km Destinations Notes
Owyhee Duck Valley Indian Reservation 0.000 0.000 SR 225 south – Owyhee, Elko Southern terminus of SH-51
1.458 2.346 BIA Road 7
2.925 4.707 BIA Road 8
7.260 11.684 BIA Road 211
11.415 18.371 Duck Valley Indian Reservation Northern border of reservation
  26.410–
26.503
42.503–
42.652
Rest Area
  69.715–
69.916
112.195–
112.519
SH-78 west – Grand View, Marsing Western end of SH-78 overlap
Bruneau 76.186–
76.240
122.609–
122.696
Roadside Picnic Area
76.582 123.247 SH-78 east – Bruneau Dunes State Park, Hammett Eastern end of SH-78 overlap
Snake River 76.979 123.886 Snake River bridge
Owyhee–Elmore county Line
Elmore Mountain Home 88.294 142.095 West 36th Street South Old Grandview Road
90.785 146.104 SH-67 west – Mountain Home AFB, Grand View
91.948–
93.598
147.976–
150.631
I‑84 Bus. – Boise, Glenns Ferry, Twin Falls Overlap on I-84 Bus. (old US-26/30) to official northern terminus at American Legion Blvd. (old US-20)
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Elevation[edit]

Elevation on the highway ranges from a low of 2461 feet (750 m) above sea level at the Snake River crossing,
to a high of 5400 feet (1646 m) at the Nevada border.

Location Milepost Elevation GNIS Feature ID (GNIS search)
Mountain Home 92 3146' - 959 m 374044 43°07′23″N 115°41′32″W / 43.12306°N 115.69222°W / 43.12306; -115.69222
C.J. Strike Reservoir
(Snake River)
76.98 2461' - 750 m 398659 42°56′54″N 115°58′30″W / 42.94833°N 115.97500°W / 42.94833; -115.97500 (C. J. Strike Dam)
Bruneau 71.49 2549' - 777 m 396181 42°52′50″N 115°47′50″W / 42.88056°N 115.79722°W / 42.88056; -115.79722
Grasmere 32.50 5089' - 1551 m 376052 42°22′36″N 115°52′57″W / 42.37667°N 115.88250°W / 42.37667; -115.88250
Riddle 13.49 5367' - 1636 m 398043 42°11′13″N 116°06′37″W / 42.18694°N 116.11028°W / 42.18694; -116.11028
Miller Creek Settlement 6.0 5325' - 1623 m 396897 42°04′54″N 116°07′41″W / 42.08167°N 116.12806°W / 42.08167; -116.12806
Owyhee, Nevada (0) 5400' - 1646 m 842663 41°56′52″N 116°05′55″W / 41.94778°N 116.09861°W / 41.94778; -116.09861

References[edit]

Route map: Bing

  1. ^ a b c ITD (March 19, 2014). "State Highway 51 Milepoint Log" (PDF). Idaho Transportation Department. Retrieved February 5, 2015. 
  2. ^ Conley, Cort (1982). Idaho for the curious: a guide. Cambridge, Idaho: Backeddy Books. p. 281. ISBN 0-9603566-3-0. 
  3. ^ Rand McNally and Company, Road map: Idaho, Mont., Wyo., published by Texaco, 1937