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Portal:Idaho

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The Idaho Portal

The University of Idaho in Moscow, Idaho, circa 1915
The University of Idaho in Moscow, Idaho, circa 1915
The flag of Idaho

Idaho (/ˈdəh/ EYE-də-hoh) is a landlocked state in the Pacific Northwest and Mountain West subregions of the Western United States. It borders Montana and Wyoming to the east, Nevada and Utah to the south, and Washington and Oregon to the west; the state shares a small portion of the Canada–United States border to the north with the Canadian province of British Columbia. Idaho's state capital and largest city is Boise. With an area of 83,569 square miles (216,440 km2), Idaho is the 14th-largest state by land area. The state has a population of approximately 2 million people; it ranks as the 13th-least populous and the seventh-least densely populated of the 50 U.S. states.

For thousands of years, and prior to European colonization, Idaho had been inhabited by native peoples. In the early 19th century, Idaho was considered part of the Oregon Country, an area which was disputed between the U.S. and the British Empire. Idaho officially became a U.S. territory with the signing of the Oregon Treaty of 1846, but a separate Idaho Territory was not organized until 1863, instead being included for periods in Oregon Territory and Washington Territory. The state was eventually admitted to the Union on July 3, 1890, becoming the 43rd state.

Forming part of the Pacific Northwest (and the associated Cascadia bioregion), Idaho is divided into several distinct geographic and climatic regions. The state's north, the relatively isolated Idaho Panhandle, is closely linked with Eastern Washington, with which it shares the Pacific Time Zone—the rest of the state uses the Mountain Time Zone. The state's south includes the Snake River Plain (which has most of the population and agricultural land), and the southeast incorporates part of the Great Basin. Idaho is quite mountainous and contains several stretches of the Rocky Mountains. The United States Forest Service holds about 38% of Idaho's land, the highest proportion of any state. (Full article...)

Castle Peak is the highest point on the Idaho Batholith

The Idaho Batholith is a granitic and granodioritic batholith of Cretaceous-Paleogene age that covers approximately 25,000 square kilometres (9,700 sq mi) of central Idaho and adjacent Montana. The batholith has two lobes that are separate from each other geographically and geologically. The Bitterroot lobe is the smaller lobe and the larger lobe is the Atlanta lobe. The Bitterroot lobe is in the north and is separated from the larger Atlanta lobe in the south by the Belt Supergroup metamorphic rocks that compose the Salmon River Arch. Much of the Atlanta and Bitterroot lobes are in the Idaho Batholith ecoregion.

The overall intrusive event that created the Idaho batholith lasted for around 55 million years from Late Cretaceous to the Eocene (98 to 43 Ma) of magmatism and includes the younger Challis suite which is not considered to be part of the Idaho Batholith. The Challis suite intruded both the Atlanta and Bitterroot lobes of the Idaho Batholith as well as the surrounding areas to the east of the Atlanta lobe. The Challis suite is more petrologically diverse and contains a range of rocks from gabbro to granite. (Full article...)

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2008 Humanitarian BowlBoise National ForestWilliam BorahCutthroat troutErnest HemingwayHarmon KillebrewSawtooth National Forest

List of governors of IdahoList of longest streams of IdahoUnited States congressional delegations from Idaho

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1970 Idaho gubernatorial election2016 Famous Idaho Potato BowlBeulah Ream AllenLeonard J. ArringtonBeaver dropDavid B. BleakBurke CanyonBurke, IdahoCoeur d'Alene, IdahoBill HaywoodUSS Idaho (BB-42)Interstate 86 (Idaho)Kootenay RiverH. Rex LeeThe Oregon Trail (1971 video game)The Oregon Trail (1985 video game)Potlatch RiverJane SeveranceSnake RiverTwin Falls saucer hoaxU.S. Route 195Brad White (defensive lineman)

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