Chatham in the Fall! The Nun Run 5K run/walk is a loop course with rolling hills and water peeks. Special prizes for costumed runners! Beers, bagels, and bananas at the post-race party at Red Nun Chatham. Proceeds from the Nun Run go to a designated local nonprofit. Recently, Dream Day on Cape Cod has been the recipient -- an organization that serves children with life-threatening illnesses and their families.