<P> Archaeological evidence shows that the Pacific Northwest was one of the first populated areas in North America . Both animal and human bones dating back to 13,000 years old have been found across Washington and evidence of human habitation in the Olympic Peninsula dates back to approximately 9,000 BCE, 3,000 to 5,000 years after massive flooding of the Columbia River which carved the Columbia Gorge . </P> <P> Anthropologists estimate there were 125 distinct Northwest tribes and 50 languages and dialects in existence before the arrival of Euro - Americans in this region . Throughout the Puget Sound region, coastal tribes made use of the region's abundant natural resources, subsisting primarily on salmon, halibut, shellfish, and whale . Cedar was an important building material and was used by tribes to build both longhouses and large canoes . Clothing was also made from the bark of cedar trees . The Columbia River tribes became the richest of the Washington tribes through their control of Celilo Falls, historically the richest salmon fishing location in the Northwest . These falls on the Columbia River, east of present - day The Dalles, Oregon, were part of the path millions of salmon took to spawn . The presence of private wealth among the more aggressive coastal tribes encouraged gender divisions as women took on prominent roles as traders and men participated in warring and captive - taking with other tribes . The eastern tribes, called the Plateau tribes, survived through seasonal hunting, fishing, and gathering . Tribal work among the Plateau Indians was also gender - divided with both men and women responsible for equal parts of the food supply . </P> <P> The principal tribes of the coastal areas include the Chinook, Lummi, Quinault, Makah, Quileute, and Snohomish . The Plateau tribes include the Klickitat, Cayuse, Nez Percé, Okanogan, Palouse, Spokane, Wenatchee, and Yakama . Today, Washington contains more than 20 Indian reservations, the largest of which is for the Yakama . </P> <P> At Ozette, in the northwest corner of the state, an ancient village was covered by a mud slide, perhaps triggered by an earthquake about 500 years ago . More than 50,000 well - preserved artifacts have been found and cataloged, many of which are now on display at the Makah Cultural and Research Center in Neah Bay . Other sites have also revealed how long people have been there . Thumbnail - sized quartz knife blades found at the Hoko River site near Clallam Bay are believed to be 2,500 years old . </P>

Who lived in washington state before european settlers
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