Proglacial Lakes of Minnesota - Glacial Lake Upham

Glacial Lake Upham

Glacial Lake Upham was formed in the wake of the retreat of the St. Louis Sublobe of the Des Moines Lobe. It drained through a series of successively lower outlets to Glacial Lake Duluth, culminating in the Saint Louis River. Its former lake bed is now a broad boggy area comprising much of the watershed of the latter stream.