No person shall skate, sled, toboggan, ski, slide, or carry on other similar activity in the park system except at such places and times as the park may designated for the purpose. No person, while engaged in such an activity, shall conduct himself in such a manner as to annoy others or to endanger, injure, or damage persons or property in any way.
('79 Code, § 2002) Penalty, see § 98.99