Although it’s legal to drive onto the sand at several Washington state beaches, all the rules of the road still apply. Celebrate the Fourth of July safely by following these safe driving tips: 🚙Drive the speed limit. Only drive on the hard-packed sand and remember pedestrians and horses have the right of way. Watch out for excited children who might dash from their cars to the sand and water. While the speed limit is 25 mph on the beach, drive for safety, at speeds much slower when near people.