Gov. Code 831.7 (dealing with hazardous recreational activities) immunizes Santa Barbara from liability for the death by drowning of a paddle boarder. Stand-up paddle boarding is a hazardous recreational activity. Santa Barbara had no duty to warn as the risk of falling from the paddle board and drowning was inherent in the sport. Santa Barbara was not grossly negligent, having taken a number of steps to promote safety among paddle boarders using its harbor. Santa Barbara charged no fee for paddle boarding in its harbor, though it received money from firms renting paddle board equipment.