Alternative Name: Columbia Plateau

Approximate Population: 1.96 Million

Largest City: Spokane

Other Notable Cities: Bend, Yakima

Tribes: Shuswap, Lilloeet, Ntlakapamux, Okanagan, Kutenai, Sandpoil, Kalispel, Spokan, Flathead, Coeur D'Alene, Walla Walla, Yakama, Cowlitz, Klickitat, Cayuse, Nez Perce, Umatilla, Tenino, Molala

Highest Point: Red Mountain (9,560 feet) in the Wallowas is the highest point in Baker County. This photo or video has been removed from Instagram. A clear day at the top of Marys Peak, at 4,097 feet, affords views to the Pacific Ocean to the west and Cascade peaks to the east, according to the Forest Service.

Notable Features: The Cascadia Plateau is home to the largest fungi in the world - aptly named the ‘Humongous Fungus’ with one honey mushroom estimated to be aged 2200 years old, and covering more than 3.5 square miles in the Malheur National Forest.

Learn about:

  • Ecoregions and Watersheds

  • Megaregion

  • Subduction Zone

  • Oceans

  • Forests

  • Waters

  • Canyons & Deserts

  • First People

  • Volcanoes