Event Dates & Times

  • Stegosaurus - May 29
  • Triceratops - June 26
  • Pterodactyl - July 24
  • T-Rex - August 21

All races will start at 6PM.


Island Lake Recreation Area
12950 Grand River Ave.
Brighton, MI 48116

Packet Pickup

  • Race day packet pick-up will be at the race site from 3:30pm – 5:30pm.
  • Please note that USAT rules prohibit us from allowing you to pick up a packet for a spouse, neighbor, coworker, friend, sibling, parent or child (18 or over)...ie, you can only pick up your own packet at packet pick-up.

A Michigan Recreation Passport is required for this event! Click HERE for more information about how to obtain a Recreation Passport.

Tri 3

Race Distances


.5 Mile Swim, 12.4 Mile Bike, 3.1 Mile Run



1.5 Mile Run, 12.4 Mile Bike, 3.1 Mile Run


Swim Course Map

View and download

Bike & Run Course Maps

View and download

August Race Course Maps

Due to construction in the park, the August race course has been adjusted to accommodate the available areas of use. You can view the course maps by clicking the link below.

View and download

Boring Important Stuff

  • Must be 14 years old to participate.
  • Please, no headphones on bike and run portion
  • Participants will be assigned to swim waves
  • No drafting permitted
  • Award calculations for individual events/series are based on age as of Dec 31, 2024


Each age group participant shall be permitted to wear a wetsuit without penalty in any event sanctioned by USA Triathlon up to and including a water temperature of 78 degrees Fahrenheit. When the water temperature is greater than 78 degrees but less than 84 degrees Fahrenheit, age group participants may wear a wetsuit at their own discretion, provided, however that participants who wear a wetsuit within such temperature range shall not be eligible for prizes or awards. Above 84 degrees, wetsuits are prohibited.


  • Individual Event Overall Awards, Men's and Women's
  • Individual Event Age Group Awards, 3 deep in 5 year age groups
  • T-Rex series Overall Awards, Men's and Women's
  • T-Rex series age group awards, 3 deep in 5 year age groups, scored by lowest total points for all 4 races