Just got back from a great (really hot and humid, but great) weekend at Sam A. Baker State Park near Patterson, MO. It's on the St. Francios River and Big Creek. Both are fantastic clear water rivers that are a pleasure to swim in. Actually the water in the rivers looked cleaner than the water in our subdivision pool. The park has some great hiking and biking as well. Had the water main not broken the facilities would have been great. I highly recommend this park.