Missouri's best whitewater — the St. Francis carves through Precambrian rhyolite at Millstream Gardens Conservation Area, creating a dramatic series of Class III–IV drops through billion-year-old igneous rock. Cat's Eye, Double Drop, and Rickety Rack are the marquee rapids on this geologically unique river. The exposed St. Francois Mountains rhyolite is among the oldest exposed rock in North America.
River conditions are community-verified. CFS ranges, difficulty ratings, and trip sections may not reflect every flow level or seasonal change. Always check current conditions, scout unfamiliar rapids, and paddle within your skill level. If you spot an error, use the Improve This River button at the top of the page — your local knowledge is what makes this atlas accurate.