It is in the Prairie Pothole Region of North America, which extends throughout three Canadian provinces and five U.S. states, and within Palliser's Triangle and the Great Plains ecoregion of Canada.

[2] The lake is long, narrow, shallow, and located in a valley that was formed by glacial meltwaters at the end of the ice age.

Beyond Willow Bunch Lake, the valley opens up into the Big Muddy Badlands.

102, and sits at the northern slope of the Missouri Coteau.

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