Lost Echo Lake[1] is a lake in the east-central part of the Canadian province of Saskatchewan in Narrow Hills Provincial Park.

[2] It is situated in a glacier-formed valley in the Cub Hills[3] and the boreal forest[4] ecozone of Canada.

It is south of Summit Lake and is accessed from secondary roads that branch off of Highway 913.

While there are no communities nor settlements on the lake, there is the Lost Echo Wilderness Campsite on the western shore.

Lower Fishing lake is drained by Stewart Creek, which flows south into Torch River.