The InterTribal Sinkyone Wilderness Council is a consortium of Northern California tribal nations focused on environmental and cultural preservation.
[1] The council, which includes members of 10 federally recognized tribes in Mendocino and Lake counties, has worked to protect lands of cultural importance along the North Coast within the traditional Sinkyone tribal territory since it was established in 1986.
[3]: 31 The 3,845-acre site (1,556 ha) was acquired by the council in 1997 following a campaign led by The Trust for Public Land.
[7]: 10 The council designated Tc'ih-Léh-Dûñ, (pronounced "tsih-ih-LEY-duhn"), as a tribal protected area which recognizes that it is within the Sinkyone traditional territory and that it holds great cultural significance for the council and its member tribes as it was the hunting, fishing and ceremonial grounds of generations of Indigenous peoples.
[6] Tc'ih-Léh-Dûñ, which means "fish run place" in the Sinkyone language, was acquired from the Save the Redwoods League in 2022.