California Code, Vehicle Code - VEH § 38318.5

(a) Any person who maliciously removes or alters trail, danger, or directional markers or signs provided for the safety or guidance of off-highway motor vehicles is guilty of a misdemeanor and shall be punished pursuant to Section 42002 by a fine of not more than one thousand dollars ($1,000) or by imprisonment in the county jail for not more than six months, or by both the fine and imprisonment.

(b) Any person who, with intent to do great bodily injury (1) proximately causes great bodily injury to any person as a result of acts prohibited by subdivision (a), or (2) erects or places any cable, chain, rope, fishing line, or other similar material which is unmarked or intentionally placed, or both, for malicious purpose is guilty of a felony.

(c) Any person convicted under subdivision (a) or (b) shall, if the violation proximately causes one or more adverse environmental impacts, also be liable in civil damages for the cost of mitigation, restoration, or repair thereof, in addition to any other liability imposed by law.