Thunder in the Valley – Terre Haute, IN 2026

USAT CERTIFIED EVENT USAT membership will be required at registration or you can opt for a 1Day USAT race license. Thunder in the Valley Triathlon is 41 years old in 2026. Athletes will also get top notch swag with custom die cast finisher medals and awards, swim caps, and a super cool Thunder in the Valley t-shirt. Sprint Triathlon Distances 500Μ SWIM 20K BIKE 5K RUN Duathlon Distances 1.6K RUN 20K BIKE 5K RUN This triathlon will begin at 8am with a 500 meter swim in the calm Hawthorn Lake. After a quick lakeside transition athletes will head out for a smooth, fast 20k bike course with rolling hills that brings them back to the transition area. Athletes will then run on a shaded, flat out and back 5k course before returning to the finish line. This race is the perfect race for the new triathlete looking for their first triathlon, or the seasoned athlete looking for their first race of the season. For 41 years, Thunder has been the race to kick-off triathlon season! The Duathlon will b