Missouri stocks hatchery trout in four state parks. Fishing costs $5 per person per day, with a limit if four (4) keepers. You can catch and release all day, but when you string the fourth fish you're done. My favorite is Meramec State Park near Cuba, Missouri; about 90 miles SW of St. Louis, of I-44. Most days they release 300 to 600 trout each day in each park. Fish are 1 to 3 pounds.