36 CFR § 2.34 - Disorderly conduct.
(a) A person commits disorderly conduct when, with intent to cause public alarm, nuisance, jeopardy or violence, or knowingly or recklessly creating a risk thereof, such person commits any of the following prohibited acts:
(1) Engages in fighting or threatening, or in violent behavior.
(2) Uses language, an utterance, or gesture, or engages in a display or act that is obscene, physically threatening or menacing, or done in a manner that is likely to inflict injury or incite an immediate breach of the peace.
(3) Makes noise that is unreasonable, considering the nature and purpose of the actor's conduct, location, time of day or night, and other factors that would govern the conduct of a reasonably prudent person under the circumstances.
(4) Creates or maintains a hazardous or physically offensive condition.
(b) The regulations contained in this section apply, regardless of land ownership, on all lands and waters within a park area that are under the legislative jurisdiction of the United States.