St. Charles County, MO Drone Rules: Park Drone Restrictions (2026)

Section 250.250 is written as a prohibition with a narrow exception rather than a set of flying rules. A person shall not operate a remotely controlled aircraft in a County park except in areas designated for such operation by the Director. Everywhere the Director has not designated, the answer is no, and it stays no whether the park is busy or empty.

The section does not stop at drones. It groups remotely controlled aircraft with watercraft, ground running vehicles, rockets, and any other similar device, so a radio-controlled boat on a County lake, an RC truck on a trail, and a model rocket are all governed by the same sentence and the same permission process. The catch-all for any other similar device means new hobby equipment falls under the rule without the County having to amend the list.

Designation alone is not enough. The code requires two things in sequence: the area must be designated by the Director, and operation may occur only after written authorization for such operation has been issued by the Director. Turning up at a designated field with no paperwork is still a violation. Because the authorization is written and issued by the Director, it is granted case by case rather than standing open to the public.

The Director also controls the terms. Such authorization may be conditioned upon proof of satisfactory liability insurance and may include noise level restrictions. Insurance addresses damage to park property and other visitors; the noise condition reflects that the same flight can be acceptable over an open field and unacceptable beside a campground or a shelter rental. Operators are separately expected not to fly in a manner that endangers the public, park resources, or other people's property, so a flight inside a designated area with valid authorization can still be stopped if it is being flown recklessly.