IRONMAN has released its 2025 international participation data, following a season that included 148 IRONMAN and IRONMAN 70.3 events. The data shows over 250,000 race registrations across the series, with IRONMAN reporting a 10% year-on-year (YOY) increase in first-time participants.
IRONMAN adds that it continues to see a dynamic shift in athlete demographics, including record numbers of younger athletes joining the sport.
One of the key trends is a continued surge in younger athletes. Participation among those under 30 has reportedly grown by 35%. The 30–34 age group remained the largest category for the second consecutive year.
Notably, the number of first-time participants under 30 has more than doubled since 2019. Full-distance IRONMAN races saw a 46% increase in this demographic compared to the previous year.
The youth movement is also reflected in the professional ranks, with 28-year-old Casper Stornes of Norway winning the men’s 2025 IRONMAN World Championship and 26-year-old Solveig Løvseth of Norway winning the women’s IRONMAN World Championship.
Female participation in IRONMAN and IRONMAN 70.3 events continues to grow, marking one of the strongest years to date. In 2025, nearly 49,500 women signed up, representing 22.5% of the international athlete community and reflecting a 7% YOY increase.
- Women made up 17% of IRONMAN athletes, marking a 10% YOY increase.
- Women made up 25% of IRONMAN 70.3 athletes, which is up 5% YOY.
Registrations among women under 30 reportedly surged by 36% this year. The growth was especially prominent among women aged 25–29, with this group seeing around 44% YOY growth as part of a 9% YOY increase of female athletes overall. For the first time, IRONMAN added that the average age of female athletes dropped below 40.
Across the Europe, Middle East, and Africa (EMEA) region, the United Kingdom, France, Germany, Belgium, the Netherlands, and Denmark all experienced growth, achieving record participation figures in 2025.
France has overtaken Germany as the second-largest triathlon market in Europe, with a 25% increase in athlete registrations and a 31% rise in international participants. Participation in France was bolstered by new event additions as well as established events. Events such IRONMAN 70.3 Les Sables d’Olonne-Vendée and IRONMAN 70.3 Nice sold out in record time.
For the 2026 season, IRONMAN reports that 32 IRONMAN and IRONMAN 70.3 races are already sold out. Eleven of the 14 early season EMEA IRONMAN 70.3 races, from February to June, are ‘already at capacity’.
To meet demand, new races have been introduced in France, Spain, and Italy, including the return of IRONMAN Vichy and the debut of IRONMAN 70.3 Alghero in Sardinia. The coming year will also see the debut of a first full-distance triathlon in the Middle East, with Experience Oman IRONMAN Oman triathlon set for December.
In North America, the average age of participants is also decreasing. The IRONMAN average dropped from 42.5 to 40, and IRONMAN 70.3 dropped from 41 to 39. The 18–29 age group showed a 23% increase for IRONMAN and 29% for IRONMAN 70.3.
Latin America is also reported to be seeing robust growth, with new events in Paraguay, Colombia, El Salvador, Chile, and Argentina. Mexico continues to be the most represented nation, making up nearly a quarter of athletes. Colombian athletes have increased by 24% YOY and Costa Rica athletes have increased by 50% YOY.
In Asia, IRONMAN is expanding its portfolio with races in Malaysia, India, China, Japan, the Philippines, Taiwan, Thailand, Korea, and Vietnam. New events for 2026 include the first full-distance triathlon in Vietnam, with IRONMAN Vietnam, and IRONMAN 70.3 Hengqin in China, along with the return of IRONMAN 70.3 Colombo in Sri Lanka.
IRONMAN adds that Oceania continues to thrive, with sell-outs for the Qatar Airways IRONMAN 70.3 Melbourne, and IRONMAN Western Australia Asia-Pacific Championship triathlon.
IRONMAN points out that it is partnering with young athletes, emerging markets, and international federations to build pipelines from other endurance sports and foster inclusive growth.
