Age Groups in Triathlon Explained (June 2026) Complete Guide
Triathlon age groups are how amateur athletes compete fairly against others in their life stage. Your age group is determined by your age on December 31 of the race year, not your age on race day. Most events use standard 5-year brackets starting at age 18, grouping athletes into categories like 25-29, 30-34, and 35-39. … Read more