T-Rex Triathlon & Duathlon
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T-Rex Triathlon & Duathlon
The T-Rex Series takes place at Island Lake Recreation Area in Brighton, Michigan, with three event dates in 2027: Triceratops on June 23, Pterodactyl on July 21, and T-Rex on August 18. A Michigan Recreation Passport is required for entry. Race day packet pick-up and late registration are held at the race site from 3:30pm to 5:30pm. Packet pick-up is for the registered athlete only.
Two race formats are offered:
- Triathlon: 0.5 mile swim, 12.4 mile bike, 3.1 mile run
- Duathlon: 1.5 mile run, 12.4 mile bike, 3.1 mile run
Participants will be assigned to swim waves. Headphones are prohibited during the bike and run portions. Drafting on the bike course is not permitted. Timing for age group awards uses chip timing; overall awards use gun time. Award categories include individual overall awards for men and women and age group awards three deep in five year age groups. Award calculations use age as of December 31, 2027. The series also includes a pint glass prize.
Wetsuit rules follow USA Triathlon guidance: wetsuits allowed without penalty at water temperatures up to 78°F; allowed at participant discretion between 78°F and 84°F but wetsuit wearers in this range are ineligible for prizes; wetsuits are prohibited above 84°F.
The series includes a club competition based on points and a memorial award that includes an annual donation to cancer research and a trophy for finishers closest to a specified target time. Visit the organization's website for the most recent information.
