Supertri Chicago 2026 returns August 22–23 with a record-breaking 9,500 athletes ready to take on the city. Athletes will swim 1.5km in Lake Michigan, bike 40km through Chicago’s iconic streets, and run 10km through the heart of the city. And the best part? @Supertri is more accessible than ever. Free First Timers Programs, relay options and Divvy bike access are helping athletes of all experience levels get to the starting line. Ready, set, Chicago! 💪 #NeverOutdoneChi