Onaway State Park on the beautiful Black Lake has rugged but picturesque land, including sand cobblestone beaches, large unique rock out-croppings and a diverse variety of trees a three-mile nature trail. The campground is set among virgin white pines and offers solitude, serenity and family fun. A variety of natural and historic attractions are located near the park. Just 10 miles east of the park is the picturesque Ocqueoc Falls, the largest waterfall in Michigan's Lower Peninsula. Another smaller waterfall is located a short walk down the river. Nearby, the Ocqueoc Falls is the underground river, a part of the Ocqueoc River that appears from a hillside and cascades over rocks and fallen trees on its way to the river bed. Fifteen miles south of the park is Shoepac Lake and the Tomahawk Lakes. Know for their good fishing, this area is also known for its sinkholes. Formed when springs eroded the soft bedrock, causing the surface to cave in, these sinkholes are now filled with trees, flowers, and wildlife. Shoepac Lake itself is a water-filled sinkhole of great depth. The nearby city of Onaway has been designated the "Sturgeon Capital of Michigan."