California Code, Fish and Game Code - FGC § 10741

(a) Except as provided in subdivision (b), nothing in this article prohibits access by a person over a road or trail, in an area described in Section 10740, to reach land that person lawfully possesses.  A person allowed access over a road or trail pursuant to this subdivision may authorize another person to do the same.

(b) Notwithstanding subdivision (a), none of the motorized vehicles or aircraft mentioned in Section 10740may be used by any person as a means of gaining access to the wilderness areas for the purpose of hunting or fishing.  Nor shall anyone having a lawful right to enter a wilderness area with a motorized vehicle or aircraft fish or hunt while within the area after having entered the area with a motorized vehicle or aircraft.