Inland Northwest

Washington

Adams, Asotin, Benton, Chelan, Columbia, Douglas, Ferry, Franklin, Garfield, Grant, Kittitas, Klickitat, Lincoln, Okanogan, Pend Oreille, Spokane, Stevens, Walla Walla, Whitman, and Yakima

Idaho

Benewah, Bonner, Boundary, Clearwater, Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone

Oregon (often included)

Morrow, Umatilla, Union, and Wallowa

Montana (sometimes included; never included as part of the Inland Empire)

Flathead, Lake, Lincoln, Mineral, Missoula, Ravalli, and Sanders

The region is bounded by the Cascade Mountains on the west and the Rocky Mountains (following the spine of the remote and rugged Cabinet Mountains) on the east, the Blue Mountains of Oregon and foothills of the Wallowa Mountains to the south, southeast, and encompasses the Columbia river basin (or Columbia Plateau). Between the three mountain ranges are large, sweeping areas of semi-arid steppe, part of which has been irrigated due to the Columbia Basin Project, resulting in expansive farmland in central Washington. The Palouse, original home of the Appaloosa, is another major agricultural region located in the gently rolling hills of southeastern Washington and extending into Idaho. In northern Idaho, the precipitation from the Pacific Ocean over the North Central Rockies forests, create the North American inland temperate rainforest.[3] The Coeur d'Alene Mountains of this range is noted for its natural resource wealth, particularly the Silver Valley with its mining heritage dating back to the 1880s.

Spokane, the region's largest city, is located near where the arid, and largely unforested Columbia plateau meets the lush forests of the Selkirk Mountains. The urban area stretches east into Idaho along the I-90 corridor through the Spokane River valley across the border of Idaho into the cities of Post Falls and Coeur d'Alene on the north bank of Lake Coeur d'Alene. The Northeastern Washington and Northern Idaho portion of the Inland Empire are mountainous and forested, and the crest of the Bitterroot Range of the Rocky Mountains forms part of the eastern boundary of the Inland Empire region, while the Columbia River forms a significant part of its southern boundary.

The Washington side is generally semi-arid, while the Idaho side experiences a mostly dry summer continental climate.

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  Hills near West Richland, Washington
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  Coeur d'Alene
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  Hangman or Latah Creek, a historical site
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  Lake Pend Oreille, 1,150 ft (350 m) deep
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  View from north of Lewiston, Idaho and Clarkston, Washington
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  Oregon Butte in the Wenaha–Tucannon Wilderness
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  Palouse Canyon
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  Palouse Falls
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  Spokane Falls
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  Priest Lake
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  The Palouse from Steptoe Butte

• Palouse
• Columbia Plateau (ecoregion)
• Inland Empire Highway
• Silver Valley, Idaho
• Lincoln (proposed Northwestern state)
• Appaloosa
• Okanagan Country