The annual Grand River Clean Up organized by the Western Reserve Land Conservancy will be held on Saturday May 24, 2025 from 8 AM to 2 PM. Volunteers will meet at Lake Metroparks Hidden Valley Park Shelter, 4872 Klasen Road, Madison Twp., OH 44057. It is primarily a water based clean up with volunteers using kayaks and canoes to clean up from Harpersfield Dam to Hidden Valley. Canoes and kayaks are available, or you can bring your own watercraft