Idaho State Highway 75
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from Boundary Creek
from Lower Stanley
State Highway 75 is a two-lane highway in the western United States that travels through the Sawtooth Valley of central Idaho. The highway's southern terminus is in Shoshone, and its northern is near Challis. It is designated as one of Idaho's scenic byways and provides access to Sawtooth National Recreation Area and primarily follows the Big Wood River in the south and the main Salmon River in the north, divided by Galena Summit.
Route description
State Highway 75 begins in Lincoln County at Shoshone at a junction with US-93 on Greenwood Street at an elevation of just under Script error: No such module "convert". above sea level. The highway heads northward, and ascends the Big Wood River valley, into Blaine County, past the Magic Reservoir to the west and crosses US-20 at Timmerman Junction at Script error: No such module "convert"..
It continues northward as the Sawtooth Scenic Byway[1] to pass through the Big Wood River communities of Bellevue, Hailey, and Ketchum. Sun Valley is accessible via a spur route junction in Ketchum at Third Street, which becomes Sun Valley Road.
Seven miles (11 km) north of Ketchum, the highway passes by the headquarters of the Sawtooth National Recreation Area at Script error: No such module "convert". and the Boulder Mountains to the north, with peaks over Script error: No such module "convert".. SH-75 climbs past the Galena Lodge to the Galena Summit at Script error: No such module "convert"., then descends to the scenic viewpoint about a mile later at Script error: No such module "convert"., overlooking the Sawtooth Mountains to the west and headwaters of the Salmon River in the Sawtooth Valley.
Highway 75 descends the grade and reaches the upper end of the valley floor at new Sawtooth City at Script error: No such module "convert"., and then enters Custer County. It runs northward down the valley with the Salmon River to Obsidian and Stanley, with the Sawtooths to the immediate west and the White Cloud Mountains to the slightly more distant east. The turnoff to picturesque Redfish Lake is about Script error: No such module "convert". south of Stanley.
At Stanley, the highway intersects with the northern terminus of State Highway 21, the Ponderosa Pine Scenic Byway from Boise, through Idaho City and Lowman.[2] The junction is at Script error: No such module "convert". and Highway 75 northbound becomes the Salmon River Scenic Byway, continuing north for a mile, then veering east and descending with the twisty river towards Clayton. Both then head north towards Challis, where the route terminates and rejoins US-93 just south of the city limits,[3] at an elevation of Script error: No such module "convert"..
History
In 1824, while searching the mountain wilderness of present-day Idaho, known then as Columbia District, for beaver, Alexander Ross came up the Wood River and discovered Galena Summit on September 18. Leading a large brigade of Hudson's Bay Company trappers, he wondered if he could get through unknown mountains and rocky defiles that obstructed his passage back to his base of operations at present Challis. Unwilling to turn back he pressed on to explore Stanley Basin and the difficult canyon beyond. When he reached Challis on October 5, 1824, he had traveled the route now followed by State Highway 75 from Bellevue to Salmon through mostly unexplored land.
The road itself dates back to at least 1926, when it was designated U.S. Route 93. The former U.S. Route 93 Alternate, running through Arco,[4] was redesignated Template:Time ago in 1977 as U.S. Route 93, and this route was given its current state highway designation.[5]
Spur route
SH-75 has a spur route connecting Ketchum to Sun Valley, running northeast for Script error: No such module "convert"., as Third Street in Ketchum and then Sun Valley Road.[6] In 2020, the Idaho Transportation Department (ITD) proposed abandoning the spur route, transferring ownership at the request of Blaine County due to urban growth along the corridor.[7][8]
Major intersections
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References
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- ↑ U.S. Route 93 Alternate Idaho's US Highways
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External links
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- Idaho Transportation Dept. – Milepost log – State Highway 75
- Roadcams – State Highway 75
- Proto Photo.com - Scenic Route 75
- David Rumsey Map Collection – Historic road map (1937) – Idaho, Montana, Wyoming – Texaco (Rand McNally)
- Idaho highway map (1956) – Shell (H.M. Gousha)