The Big Valley Band of Pomo Indians of the Big Valley Rancheria is a federally recognized tribe of Pomo and Pit River Indians, with a reservation located in Lake County, California, near the town of Finley. They conduct tribal business from Lakeport, California. The tribe formed its current governmental system under the Indian Reorganization Act of 1935 and ratified its constitution on 15 January 1936. Tribal membership is open to any descendant of the tribal members listed on the official 1935 census rolls, regardless of blood quantum. Today tribal enrollment is estimated to be 225. The traditional language of the tribe is Eastern Pomo, also known as Bahtssal or Clear Lake Pomo.
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