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The Life Time Chicago Triathlon returned on Aug. 28-29, 2021, after a year hiatus.
(Antonio Perez)
Athletes take part in the Life Time Chicago Triathlon 2021 on Aug. 29, 2021, after a year hiatus. (Antonio Perez / Chicago Tribune)

Hundred of athletes take part in the swim portion of the Life Time Chicago Triathlon 2021 in Lake Michigan near Randolph Street on Aug. 29, 2021. (Antonio Perez / Chicago Tribune)

Athletes come out of the water and run along a red carpet-like path as they head for their bikes to take part in the Life Time Chicago Triathlon 2021, Aug. 29, 2021. (Antonio Perez / Chicago Tribune)

Athletes grab their bikes to take part in the Life Time Chicago Triathlon 2021, on Aug. 29, 2021. (Antonio Perez / Chicago Tribune)

Athletes take part in the Life Time Chicago Triathlon 2021, on Aug. 29, 2021. (Antonio Perez / Chicago Tribune)

Hundred of athletes take part in the swim portion of the Life Time Chicago Triathlon 2021 in Lake Michigan near Randolph Street on Aug. 29, 2021. (Antonio Perez / Chicago Tribune)

Bystanders watch as hundreds of athletes take part in the swim portion of the Life Time Chicago Triathlon 2021 in Lake Michigan near Randolph Street on Aug. 29, 2021. (Antonio Perez / Chicago Tribune)