The Confederated Tribes of the Umatilla Indian Reservation is a federally recognized confederation of three Sahaptin

Sahaptin language

Sahaptin , Sħáptənəxw, is a Plateau Penutian language of the Sahaptian branch spoken in a section of the northwestern plateau along the Columbia River and its tributaries in southern Washington, northern Oregon, and southwestern Idaho....

-speaking Native American

Native Americans in the United States

Native Americans in the United States are the indigenous peoples in North America within the boundaries of the present-day continental United States, parts of Alaska, and the island state of Hawaii. They are composed of numerous, distinct tribes, states, and ethnic groups, many of which survive as...

 tribes who traditionally inhabited the Columbia River Plateau

Columbia River Plateau

The Columbia Plateau is a geologic and geographic region that lies across parts of the U.S. states of Washington, Oregon, and Idaho. It is a wide flood basalt plateau between the Cascade Range and the Rocky Mountains, cut through by the Columbia River...

 region: the Cayuse

Cayuse

The Cayuse are a Native American tribe in the state of Oregon in the United States. The Cayuse tribe shares a reservation in northeastern Oregon with the Umatilla and the Walla Walla tribes as part of the Confederated Tribes of the Umatilla Indian Reservation...

, Umatilla

Umatilla (tribe)

The Umatilla are a Sahaptin-speaking Native American group living on the Umatilla Indian Reservation, who traditionally inhabited the Columbia Plateau region of the northwestern United States....

, and Walla Walla

Walla Walla (tribe)

Walla Walla |Native American]] tribe of the northwestern United States. The reduplication of the word expresses the diminutive form. The name "Walla Walla" is translated several ways but most often as "many waters."...

.

The tribes share the Umatilla Indian Reservation

Umatilla Indian Reservation

The Umatilla Indian Reservation is an Indian reservation in eastern Oregon in the United States, mostly located in Umatilla County, with a very small part extending south into Union County...

 and a governmental structure as part of their confederation.

The Confederated Tribes opened the Wildhorse Resort & Casino

Wildhorse Resort & Casino

Wildhorse Resort & Casino is a casino owned and operated since 1994 by the Confederated Tribes of the Umatilla Indian Reservation in the U.S. state of Oregon...

, with a hotel and four restaurants, located four miles east of Pendleton. The Wildhorse Casino opened in 1995, multiplying its budget sevenfold and cutting unemployment on the reservation in half.

External links

• Confederated Tribes of the Umatilla Indian Reservation
• Columbia River Inter-Tribal Fish Commission - member tribes include the Umatilla