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Located in the beautiful Millennium Park in Grand Rapids, MI, TriMillennium offers an Olympic and Sprint distance triathlon. Our Olympic race features a 1,500-meter swim, 24.8-mile bike, and 6.2-mile run. Our Sprint distance race features a 600-meter swim, 12.4-mile bike, and 3.1-mile run. Relay options are available for both races. 100% of proceeds from TriMillennium will go to support the inner-city youth of Grand Rapids, helping provide them with opportunities to succeed.

How to enter the TriMillennium

  1. Sprint Triathlon

    Triathlon: Swim 0.6km, Bike 12.4mi, Run 5km
    Event passed
  2. Sprint Duathlon

    Triathlon: Run 5km, Bike 12.4mi, Run 5km
    Event passed
  3. Sprint AquaBike

    Other: Swim 0.6km, Bike 12.4mi
    Event passed
  4. Olympic Triathlon

    Triathlon: Swim 1.5km, Bike 24.8mi, Run 10km
    Event passed
  5. Olumpic Duathlon

    Duathlon: Run 10km, Bike 24.8mi, Run 10km
    Event passed
  6. Olympic Aquabike

    Other: Swim 1.5km, Bike 24.8mi
    Event passed

TriMillennium training plans

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TriMillennium routes

The Millennium Park lake typically offers calm, pleasant water, and our run and bike courses are flat and fast, making TriMillennium a great race for the elite athlete looking for an August "A" race, a beginner athlete looking to complete their first triathlon, or a primer race for those prepping for the MiTi half or full triathlon later in August. With professional timing from Trivium Racing and a full complement of volunteers and support on race-day, TriMillennium is a race for everyone.

Event Details

TriMillennium weather forecast

Clear throughout the day.

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Meet the organizer

Organizer's website

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