T-Rex Triathlon & Duathlon

AUG

19

2026

Join this midweek sprint series at Island Lake State Recreation Area featuring triathlon and duathlon options. All finishers receive a custom medal and post race food after completing the scenic course.

Wed 19 Aug 2026

South Lyon, Michigan

Website

Sprint Triathlon (0.5 Mil... Duathlon (1.5 Mile Run, 1...

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T-Rex Triathlon & Duathlon Series

The T-Rex Triathlon & Duathlon Series consists of three separate events scheduled for June 24, July 22, and August 19. These midweek sprint competitions take place at the Island Lake State Recreation Area. Participants can choose between two different multisport formats.

The sprint triathlon includes the following disciplines and distances:

.5 mile swim
12.4 mile bike
5K run

The duathlon option consists of these segments:

1.5 mile run
12.4 mile bike
5K run

Participants who complete the course receive a custom finisher medal and access to post-race food. All athletes are eligible for awards. Supplemental items, such as a race shirt or a lightweight series hoodie, are available as options. The event is supported by partners including USA Triathlon and local running organizations. Visit the organization's website for the most recent information.

7 km

Duathlon (1.5 Mile Run, 12.4 Mile Bike, 5k Run)

5 km

Sprint Triathlon (0.5 Mile Swim, 12.4 Mile Bike, 5k Run)