15K, 10K, 5K, 1.2-mile, and half-mile open water races. Awards, medals for finishers, T-shirts, & more. Proceeds benefit North Star Reach, a camp for kids with life-threatening medical conditions. Races begin at 6:30 a.m.–9:30 a.m. (registration opens at 5:45 a.m.) Halfmoon Lake beach, 8725 Hankerd, Dexter. $110–$170 by Aug. 11 at swimtothemoon.net; $120–$190 on race weekend. Michigan Recreation Passport, or $13 park pass purchase at the gate required for each vehicle. [email protected], (734) 585–7101.