Spring Valley Summit is a

mountain pass A mountain pass is a navigable route through a mountain range or over a ridge. Since many of the world's mountain ranges have presented formidable barriers to travel, passes have played a key role in trade, war, and both Human migration, human a ...

in the

western Western may refer to: Places *Western, Nebraska, a village in the US *Western, New York, a town in the US *Western Creek, Tasmania, a locality in Australia *Western Junction, Tasmania, a locality in Australia *Western world, countries that id ...

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...

southwestern The points of the compass are a set of horizontal, radially arrayed compass directions (or azimuths) used in navigation and cartography. A compass rose is primarily composed of four cardinal directions—north, east, south, and west—each sepa ...

Idaho Idaho ( ) is a state in the Pacific Northwest region of the Western United States. To the north, it shares a small portion of the Canada–United States border with the province of British Columbia. It borders the states of Montana and Wyom ...

, at an

elevation The elevation of a geographic location is its height above or below a fixed reference point, most commonly a reference geoid, a mathematical model of the Earth's sea level as an equipotential gravitational surface (see Geodetic datum § Vert ...

of above

sea level Mean sea level (MSL, often shortened to sea level) is an average surface level of one or more among Earth's coastal bodies of water from which heights such as elevation may be measured. The global MSL is a type of vertical datuma standardised g ...

. North of the city of

Boise Boise (, , ) is the capital and most populous city of the U.S. state of Idaho and is the county seat of Ada County. On the Boise River in southwestern Idaho, it is east of the Oregon border and north of the Nevada border. The downtown area's ...

, it is traversed by State Highway 55, the ''Payette River Scenic Byway.''Idaho Byways - Payette River Scenic Byway
Located in southwestern

Boise County Boise County is a rural mountain county in the U.S. state of Idaho. As of the 2020 United States Census, the population was 7,610. The county seat is historic Idaho City, which is connected through a series of paved and unpaved roads to Lowman ...

, the summit is south of the city of

Horseshoe Bend Horseshoe Bend may refer to: Places Australia * Horseshoe Bend, New South Wales, an inner city suburb in the City of Maitland in the Hunter Region * Horseshoe Bend Station, a pastoral lease that operates as a cattle station in the Alice Sprin ...

, below. It marks the divide between the

Payette River The Payette River () is an U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed May 3, 2011 river in southwestern Idaho and is a major tributary of the Snake River. Its headwaters originate ...

and

Boise River The Boise River is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. , accessed May 3, 2011 tributary of the Snake River in the Northwestern United States. It drains a rugged portion of the Sawtooth Range in sou ...

drainage areas. The new multi-lane grade of Highway 55 into Horseshoe Bend was completed in the fall of 1991; the old curvier road is to the west, long plagued by landslides and closures. Part of an ancient lake, dozens of springs fed water and undermined the roadway. Of the major grades from Boise to

north North is one of the four compass points or cardinal directions. It is the opposite of south and is perpendicular to east and west. ''North'' is a noun, adjective, or adverb indicating Direction (geometry), direction or geography. Etymology T ...

Idaho, it was the last to be improved. The other three, all on U.S. 95, were White Bird Hill (1975), Lapwai Canyon (1960), and Lewiston Hill (1977). The north side of the summit is also known as Horseshoe Bend Hill.

References

External links

Visit Idaho.org
- official state tourism site
Idaho Transportation Dept.
- web-cam - Horseshoe Bend Hill (Spring Valley Summit)
"Bread Loaf Rock"
a local landmark in the valley between the roads, facing the older routing Mountain passes of Idaho Landforms of Boise County, Idaho Transportation in Boise County, Idaho {{BoiseCountyID-geo-stub