"Biny Gwechugh" is the Tŝilhqot’in name for this lake meaning 'big lake along the river' referring the the widening part of Tŝilhqox (Chilko River) at this location, where the flow of the river slows and it becomes lake-like. Another name for this place is 'Canoe Crossing' (Advice from Tsilhqot'in National Government, 2018).
Source: included with note
"Biny Gwechugh" refers to this stretch of the river, as well as the localities on either side of the river (Advice from the Tsilhqot'in National Government, 2018).