Wasco Indians. A Chinookan tribe formerly living on the south side of Columbia river, in the neighborhood of The Dalles, in Wasco County, Oregon. This tribe, with the Wishram (also known as Tlakluit and Echeloot), on the north side of the river, were the easternmost branches of the Chinookan family.
Tenino Indians. A Shahaptian tribe formerly occupying the valley of Des Chutes River, Oregon. The Tenino dialect was spoken on both sides of the Columbia from The Dalles to the mouth of the Umatilla. In 1855 they joined in the Wasco treaty and were placed on Warm Springs Reservation, since which time they have usually been called Warm Springs Indians, a term embracing a number of tribes of other stocks which were included in the treaty. The present number of Tenino is unknown, but it is probably not more than 30.
Tyigh Indians. A Shahaptian tribe speaking the Tenino language and formerly occupying the country about Tygh and White rivers in Wasco County, Oregon. They took part in the Wasco treaty of 1855 and are now on the Warm Springs Reservation, Oregon. Their number is not reported, as they are classed under the indiscriminate term “Warm Springs Indians,” but in 1854 they were said to number 500, and in 1859, 450.