I'm sorry for any confusion, but it appears there has been a misunderstanding. John Marshall Park isn't a beach; it's actually a park located in Washington, D.C., and not in Shady Side, United States. It doesn't have beach-related amenities, such as sand, beach length, lifeguards, or beach activities like swimming, surfing, etc. As such, it would not be accurate to provide a description based on the criteria given (location, sand color, beach activities, parking related to a beach setting, fun beach facts, beach attractions, nearby restaurants with a focus on beach-goers, and beach hotels) for John Marshall Park.
