Interstate 90 in Idaho
Section of Interstate Highway in Idaho, United States / From Wikipedia, the free encyclopedia
This article is about the section of Interstate 90 in Idaho. For the entire route, see Interstate 90.
Interstate 90 (I-90) is a transcontinental Interstate Highway that runs east–west across the northern United States. Within the state of Idaho, the freeway travels for 74 miles (119 km) from the Washington border near Spokane to Coeur d'Alene and the panhandle region at the north end of the state. After traveling through the Silver Valley along the Coeur d'Alene River in the Bitterroot Range, I-90 crosses into Montana at Lookout Pass.
Quick Facts Route information, Length ...
Purple Heart Trail | ||||
Route information | ||||
Maintained by ITD | ||||
Length | 73.888 mi[1] (118.911 km) | |||
Existed | 1957–present | |||
History | Completed in 1991 | |||
NHS | Entire route | |||
Major junctions | ||||
West end | I-90 at the Washington state line | |||
Major intersections |
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East end | I-90 at the Montana state line | |||
Location | ||||
Country | United States | |||
State | Idaho | |||
Counties | Kootenai, Shoshone | |||
Highway system | ||||
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I-90 was created by the federal government in 1957, following the general route of U.S. Route 10 (US 10) and the mid-19th century Mullan Road constructed by the U.S. Army. The freeway was constructed in stages between 1960 and 1992.