California Code, Harbors and Navigation Code - HNC § 667

In addition to any other court which may be a proper place of trial, any superior court location where cases of that type are tried, within 50 miles by the nearest road to the place of the alleged offense, shall be a proper place of trial of any person on a charge of violation of this chapter or any regulation adopted by the department pursuant to this chapter or any ordinance or local law relating to the operation and equipment of vessels if the county in which the court is located includes any portion of the body of water upon which the offense charged is alleged to have been committed.