Visitors can climb the cliffs of the St. Croix River Dalles, canoe the flatwater, watch kayakers rush through the rapids, or relax on a excursion boat. Spring brings a great diversity of wildflowers and in fall, the St. Croix River Valley forest is ablaze in the autumn colors of red, gold, and orange. The geology that formed this park intrigues visitors, and brings geologists from all over the world. At least 10 different lava flows are exposed in the park, along with two distinct glacial deposits, and traces of old streams valleys and faults. During the summer, the park naturalist provides tours of the glacial potholes, a landmark of the park, along with programs about the natural history of the area.