When angler Terry Matheny launched his boat at the Sioux City boat launch and headed up the "Big Sioux" with his fishing friends, neither realized this was going to be the fishing trip of a lifetime. Some hours later, after fishing two different holes somewhere around the west entrance of "Stone Park", it is rumored, Matheny had put a 71 pound blue catfish into the boat and Lemon had boated a possible South Dakota State Record 99,25 pounder. They also had a nice 35,1 pound blue and a 5 plus pound channel catfish.
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