The area spanning the head of Tŝilhqox Biny and Taseko Lake basins and the two valleys between the two lakes has been preserved as the Ts'il?os Provincial Park, which is co-administered by the Parks Branch of the provincial government and by the Xeni Gwet'in, who are the residents of Nemaia Valley and one of the component bands of the Tsilhqot'in (Chilcotin) people; Nemaia is the more northerly of the two east-west valleys, the southerly one is Yohetta Valley. Tsi'l?os is the Tsilhqot'in name for Mount Tatlow 3,063 m (10,049 ft), which stands in the ranges between Chilko and Taseko Lakes. Higher still are the mountains at the head of Tŝilhqox Biny, crowned by 3,182 m (10,440 ft) Monmouth Mountain, and to the southwest of the lake, between the two arms, is Mount Good Hope 3,242 m (10,636 ft), with the range rising west from there towards Mount Queen Bess 3,298 m (10,820 ft), to the south of Tatlayoko Lake and higher still beyond to Mount Waddington.