St. Croix River-St. Croix Falls to Stillwater Professional Review and Guide
"The St. Croix enters a valley of dramatic outcrops and soaring bluffs. Overnight camping is limited, but the river is popular for day trips -- too popular, in fact, judging by canoe and boat traffic on summer weekends.
A long section of easy rapids follows the hydroelectric dam at St. Croix Falls, Wisconsin, but there’s no easy way to get to them. Then, directly beneath the US 8 bridge, the river flows through a deep, powerful Class II–III rapids (river mile 52.5), about 50 yards long, that kicks waves up to 3 feet high. In summer, when smaller stretches of rapids are too low and scratchy to run, whitewater paddlers flock to this single rapids on the St. Croix to practice eddy turns and surfing."