Some days it's just you, loons, and moose, while you traverse around Hayes Lake. Fed by the north fork of the Roseau River, the lake supports crappie, sunfish, large mouth bass, and northern. Birdwatchers have spotted over 200 species in or near the park. The summer is perfect to look for orchids, gentians, and blueberries (you can pick the berries, but not the flowers). Visitors also enjoy swimming and canoeing in the lake, along with camping. Trails for hiking, skiing, snowmobiling, and horseback riding connect with the Beltrami Island State Forest.