Glacial Potholes Professional Guide
Detailed Trail Description from our Guidebook
"The western terminus of the Ice Age National Scenic Trail appropriately lies within this state park where you can look out over the St. Croix River and find geological features known as “potholes,” created by meltwater drainage of a glacial lake. Expect great views of the river, canyon, rock formations, and a waterfall.
Ten thousand years ago, glacial Lake Duluth rose hundreds of feet above the present level of Lake Superior. Ice blocked the present eastern drainage of the lake near Sault Ste. Marie. The meltwater of a vast ice field 5,000 feet thick and the size of the state of Minnesota began to flow south past this point. That incredible current was the source of Interstate Park’s famous potholes and rock formations."