A dataset of 2.7 million IRONMAN triathlon records with transition times (2002-2026)

Anonymized dataset of 2,706,922 athlete-race records from more than 1,500 IRONMAN triathlon events (2002-2026). Includes swim, T1, bike, T2, run, and overall split times in seconds; finish status; age group; gender; country; AWA qualification points; and distance completed per segment. Data were obtained from the official IRONMAN results platform (75.4%) and CoachCox (24.6%), with 99.7-99.9% cross-source agreement. Athlete names removed for privacy.