Weapon regulations on the Trace defer to state law in many, but not all, respects. The basic rule is that “Any Firearm that is legal to possess under state law may be carried in your personal vehicle while traveling the Natchez Trace Parkway. Effective July 1, 2010 in Mississippi, the possession of a handgun permit is required when in possession of a concealed handgun outside your vehicle.” This means that no license is needed for carrying a firearm in your vehicle but a license (either “regular” or “training endorsement”) is required to take a concealed weapon out of the vehicle. Open carry is not addressed but since it is allowed under Mississippi law open carry should be permissible except in federal buildings. Proceed at your own risk. Note that other federal law applies to certain facilities and visitors should heed all postings.