St. Croix Falls    

The St. Croix River Valley was formed when the glacial lobe in the area retreated, draining glacial Lake Duluth. Giant floods cut the valley through billion-year-old volcanic basalt bedrock.  At St. Croix Falls, the St. Croix River is divided by a hydro-electric dam. Downstream of the dam, the river flows through a unique gorge created by glaciers. The famous rock formations, or Dalles, makes this one of the most scenic and popular parts of the St. Croix River.