Kick off the summer with a brisk physical challenge on Lake Minnetonka. The triathlon will include a swimming section in the lake as well as biking and running onshore; some of the proceeds go toward charity. Worried about doing that all by yourself? Register with one or two friends as a relay team. All ages. $102 individual, $120 relay. Packet pick up 3:30–7 p.m. June 19, mandatory pre-race meeting 7 a.m. June 20. Race starts at 7:30 a.m.. Pick up at Start Line Running Store, 12979 Ridgedale Drive, Minnetonka; race start at Excelsior Commons, Excelsior; lakeminnetonkatriathlon.com.