The most Ironman 70.3 races completed in one year was 22 by James Lawrence (USA) of Lindon, Utah, USA, between 27 March and 13 November 2010. Lawrence concluded his record by participating in the Ironman 70.3 World Championships. An Ironman 70.3 is classified as a “half-Ironman.” Participants must complete a 1.93 km (1.2 mi) swim, 90.12 km (56 mi) cycle, and 21.08 km (13.1 mi) run.

Lawrence’s best time for any of the races was 4 hr 39 min 24 sec in his 11th race.