Lake Chouteau was a glacial lake formed during the late Pleistocene along the Teton River. After the Laurentide Ice Sheet retreated, water melting off the glacier accumulated between the Rocky Mountains and the ice sheet.
The lake drained along the front of the ice sheet, eastward towards the Judith River and the Missouri River. The maximum advance of the Laurentide Ice Sheet blocked the drainages of north- and east-flowing rivers, forming glacial lakes along the margin of the ice.
Lake Chouteau was a glacial lake formed during the late Pleistocene along the Teton River. After the Laurentide Ice Sheet retreated, water melting off the glacier accumulated between the Rocky Mountains and the ice sheet.
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