The Missouri River in the Chamberlain, SD area is the best area to fish walleyes on the Missouri River. We have the longest walleye season in the country. As long as there is open water, we catch walleyes. Our best times of year, are from May 10th to the July 15th. But as you can see with our pictures, we have a 6 month or better walleye window, with some awesome fall fishing. We always say to book a trip whenever your time allows. There is an excellent chance you will have a fantastic fishing trip.