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The first people of the Tualatin Valley were the Atfalati or Tualaty tribe of the Kalapuya, who inhabited the region for up to 10,000 years before white settlers arrived. The valley consisted of open grassland maintained through annual burning by the Atfalati, with scattered groves of trees along the streams. The Kalapuya moved from place to place in good weather to fish and hunt and to gather nuts, seeds, roots, and berries. Important foods included camas and wapato, and the Atfalati traded for salmon from Chinookan tribes near Willamette Falls on the Willamette River. During the winter, they lived in longhouses in settled villages, some near what became Hillsboro and Beaverton.