Plateau (Native American culture area)

Plateau (Native American culture area)
Name	Plateau culture area
Caption	Columbia River near Celilo Falls, traditional trade corridor
Region	Interior Pacific Northwest
States	Washington (state), Oregon, Idaho, Montana (state)
Tribes	Nez Perce, Spokane Tribe of Indians, Coeur d'Alene Tribe, Colville Confederated Tribes, Umatilla Indian Reservation, Warm Springs Indian Reservation, Yakama Nation, Confederated Tribes of the Umatilla Indian Reservation, Kootenai Tribe of Idaho, Kalispel Tribe, Sinixt
Languages	Nez Perce language, Salishan languages, Kutenai language, Interior Salish languages, Plateau Penutian languages

Plateau (Native American culture area) The Plateau culture area encompasses interior regions of the Pacific Northwest centered on the Columbia River basin and adjacent plateaus and valleys. Populated by diverse Indigenous nations including the Nez Perce, Spokane Tribe of Indians, Coeur d'Alene Tribe, and Kutenai, the area features distinctive lifeways tied to salmon runs, root harvesting, and intertribal trade networks. The region's geography, languages, and colonial history shaped varied responses to European contact, missionization, treaty-making, and twentieth‑century federal policy.

Geography and environment

The Plateau spans the Columbia River, Snake River, and tributary basins across present-day Washington (state), Oregon, Idaho, and Montana (state), bounded by the Cascade Range, Rocky Mountains, and Blue Mountains (Oregon). Seasonal floods at sites like Celilo Falls created rich salmon runs exploited by communities including the Umatilla Indian Reservation peoples and the Warm Springs Indian Reservation populations. Arid plateaus, riparian corridors, and montane meadows supported camas and other roots near locations such as Nez Perce National Historical Park and Hells Canyon National Recreation Area, fostering mobility between riverine and upland zones.

Peoples and languages

Plateau peoples include Interior Salishan languages speakers—Spokane tribe, Kalispel—and Plateau Penutian languages speakers such as the Nez Perce. The Kutenai language stands as a language isolate associated with the Kootenai Tribe of Idaho. Numerous nations later consolidated into federally recognized entities like the Confederated Tribes of the Umatilla Indian Reservation and the Colville Confederated Tribes, while other groups such as the Sinixt continue revitalization efforts. Intermarriage and multilingualism were common, with trade and seasonal rounds promoting fluency across linguistic boundaries.

History and pre-contact period

Before sustained European contact, Plateau societies maintained extensive exchange networks reaching coastal groups like the Chinook people and interior groups such as the Blackfeet Nation. Archaeological sites in the Okanogan Country and along the Lower Snake River show long-term occupation, material exchange, and salmon-centric economies. Seasonal aggregations at fishing sites and root-gathering meadows produced social ties evident in oral histories collected at Nez Perce National Historical Park and ethnographic records by observers including Franz Boas and J. Owen Dorsey.

European contact and colonization

Fur trade expansion by companies such as the Hudson's Bay Company and the North West Company brought European goods, diseases, and new alliances into Plateau networks. Expeditions like the Lewis and Clark Expedition traversed Plateau territories, interacting with leaders including Chief Joseph of the Nez Perce decades later during treaty disputes. Treaties and reservation policies—negotiated with entities such as the Confederate Tribes of the Umatilla Indian Reservation and the Yakama Nation—transformed land tenure, while missionary activities from denominations like the Methodist Episcopal Church and institutions such as the Catholic Church influenced cultural change.

Economy and subsistence practices

Economies combined seasonal salmon fishing at places like Celilo Falls with root and tuber harvesting—camas, bitterroot—and hunting of elk and deer in ranges overlapping Yellowstone National Park peripheries. Trade in obsidian, camas bulbs, and dried salmon linked Plateau markets to coastal emporia at Fort Vancouver and inland posts like Fort Hall. Material adaptations included fishing technologies, platform-style fish wheels at riverine sites, and caching strategies to manage variable resources amid climatic oscillations.

Social organization and material culture

Social life featured kin-based bands, exogamous marriage patterns, and hierarchical leaders recognized for wealth and oratory within villages such as those recorded at Kettle Falls. Winter longhouses and summer lodgings varied across the Plateau; many groups used tule, cedar, and pit-house constructions in different ecotones. Material culture includes elaborated basketry, distinctive Plateau-style robes, and trade beads from European exchange visible in museum collections at institutions including the Smithsonian Institution and the British Museum.

Religion, ceremonies, and arts

Ceremonial life incorporated salmon-centric rituals, vision quests, and seasonal gatherings akin to potlatch-like gift exchanges observed among some Plateau groups and neighboring Coast Salish peoples. Storytelling, song, and narrative traditions—preserved in archives like those of Edward S. Curtis and the Bureau of American Ethnology—convey cosmologies, origin stories, and regulations for resource use. Artistic expressions include intricate basketry, quillwork, and beadwork maintained by cultural programs within entities such as the Confederated Salish and Kootenai Tribes.

Contemporary issues and tribal sovereignty

Contemporary Plateau nations address treaty rights, salmon restoration, language revitalization, and jurisdictional disputes through tribal governments such as the Yakama Nation and advocacy in forums including the United States v. Washington (Boldt decision) legacy. Environmental struggles—from hydropower impacts at Grand Coulee Dam to habitat restoration in the Snake River basin—intersect with legal actions involving the U.S. Department of the Interior and conservation bodies like the National Park Service. Cultural revitalization projects at institutions such as the Nez Perce Tribe's cultural center, language programs for Nez Perce language and Interior Salish languages, and collaborations with universities including University of Washington advance sovereignty, education, and heritage preservation.

Category:Indigenous peoples of the Pacific Northwest