T-Rex Triathlon & Duathlon

AUG

19

2026

The T Rex Triathlon & Duathlon Series offers three midweek sprint race dates in June, July and August 2026 at Island Lake State Recreation Area. Events include sprint triathlon and duathlon distances and finishers receive medals and finish food.

Wed 19 Aug 2026

South Lyon, Michigan

Website

Duathlon (first Run) Duathlon (second Run) Sprint Triathlon (run Por...

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T Rex Triathlon & Duathlon Series

The T Rex Triathlon & Duathlon Series stages three midweek sprint race dates in 2026: June 24, July 22, and August 19. Events take place at Island Lake State Recreation Area and present both triathlon and duathlon formats with set segment distances.

Participants in the triathlon complete segments in the order listed: swim, bike, then run. Participants in the duathlon complete segments in run, bike, then run. Distances for each format are:

Triathlon: 0.5 mile swim, 12.4 mile bike, 5K run.
Duathlon: 1.5 mile run, 12.4 mile bike, 5K run.

All finishers receive a custom medal and finish food and are eligible for awards. Optional apparel is available, including a race shirt and a T Rex Series lightweight hoodie. The event description identifies Island Lake State Recreation Area as the race location and lists three specific summer dates in 2026. Visit the organization's website for the most recent information.

5 km

Duathlon (second Run)

5 km

Sprint Triathlon (run Portion)

Duathlon (first Run)