Sylvan Lake in Custer State Park, South Dakota, is a stunning, peaceful lake surrounded by granite peaks and lush forests. Known for its crystal-clear waters, it's a popular spot for boating, fishing, and picnicking. The lake is also a hub for outdoor activities, offering scenic hiking trails that wind through the surrounding hills, including the popular Sylvan Lake Shore Trail. Its picturesque beauty makes it a must-visit destination for nature lovers and photographers alike.