National Marina Day...June 9, 2018. National Marina Day promotes the role marinas play as family-friendly gateways to boating. Products and services will be on display to highlight the many pleasurable benefits related to both waterfront and outdoor lifestyles. Stop by Chautauqua Marina and rent a boat or purchase safety equipment for your boat. The Goal of National Marina Day, “Lake Day” as a celebration of National Marina day is to get the residents and visitors out on the lake and to make the public more aware and participatory of their local lake environment.