The Ancient Lakes "Touch All The Lakes" Challenge is a lake bagging challenge in the Quncy lakes unit of the Columbia Basin Wildlife Area. The goal is to design your own route to touch all 20 of the names lakes in the Ancient Lakes area.
These 20 named lakes are the four lakes which make up Ancient Lake, Judith Pool, H Lake, Stan Coffin Lake, Flat Lake, Quincy Lake, Burke Lake, Evergreen Reservoir, Cree Lake, Dot Lake, Crystal Lake, the two Spring Lakes, Cup Lake, Cascade Lake, Cliff Lake, and Dusty Lake.
The required lakes are shown on a map here: https://caltopo.com/m/C5AP and the Ancient Lakes TATL Challenge is described in detail in the following video, beginning at the 2:35 mark: https://youtu.be/HOlDTVDIc-Q