Can I legally hunt with my metal detector in Missouri state parks?
Yes, you can — in some specific locations, at least, and as long as you follow the rules.
Metal detecting is allowed only on specific sand beaches in the facilities listed below.
A permit is required. However, this may be obtained free of charge by writing to Missouri Department of Natural Resources, Facility and Visitor Services Program, P.O. Box 176, Jefferson City, MO 65102, or by e-mail (firstname.lastname@example.org). Please provide them with your name and postal mailing address.