The locator of any lode mining claim shall define the boundaries of the claim so that they may be readily traced, but in no case shall the claim extend more than 1,500 feet along the course of the vein or lode, or more than 300 feet on either side thereof as measured from the centerline of the vein at the surface. Within 60 days after the date of location of any lode mining claim located, the locator shall erect at each corner of the claim, a monument as defined in Section 3915. Each corner monument so erected shall bear or contain markings sufficient to appropriately designate the corner of the mining claim and the name of the claim to which it pertains.
Ca. Pub. Res. Code § 3901