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Tri Millennium

Tri Millennium is a triathlon, aquabike, and duathlon race on July 24–25, 2026 in Walker, MI, with entry fees from $45 to $139.

Date
July 24–25, 2026 (1 day to go)
Price
$45–$139
Sports
TriathlonAquabikeDuathlon
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From the Organizer

Tri Millennium is one of West Michigan's longest-standing multi-sport events and a favorite among many local athletes.  Located in the beautiful Millennium Park in Grand Rapids, MI, Tri Millennium offers an Olympic and Sprint distance triathlon, duathlon, and aquabike.  Our Olympic race features a 1,500-meter swim, 24.8-mile bike, and 6.2-mile run.  Our Sprint distance race features a 750-meter swim, 12.4-mile bike, and 3.1-mile run.  Relay options are available for both races.

The inland waters of Millennium Park are typically calm and pleasant, the surrounding roads follow the rolling terrain for the bike course, and the paved trails through the park are flat and fast, making Tri Millennium a great race for the elite athlete looking for a summer "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, Tri Millennium is a race for everyone.    

Tri Millennium's charity partner is Bridge Street Ministries, a Christian urban youth ministry in Grand Rapids' West Side, working to support the spiritual, academic, and social development of inner-city youth, leading them with a vision of hope and restoration and believing that they will be the future leaders of our community.  100% of the donations from Tri Millennium will go to support this important work. For more information, visit bsmgr.org.

Events

Sprint Tri Relay (3 Person)$59.67
Kids Tri (Ages 6-8)$45
Kids Tri (Ages 9-11)$45
Kids Tri (Ages 12-15)$45
Sprint Tri Relay (2 Person)$89.50
Sprint Duathlon$129
Sprint Aquabike$129
Sprint Tri$129
Olympic Tri Relay (3 Person)$46.33
Olympic Tri Relay (2 Person)$69.50

Weather

Race-Day Forecast

Live forecast from the U.S. National Weather Service.

Race Day 1

Friday, 7/24

High

82°

Low

59°

Mostly sunny

0% precip · 1 to 7 mph winds

Race Day 2

Saturday, 7/25

High

83°

Low

68°

Mostly sunny

33% precip · 2 to 13 mph winds
Sunrise 6:26 AMSunset 9:12 PMDaylight 14h 46m

Host City

About Walker, MI

Nearest Airport

GRR

Gerald R. Ford International Airport · 12 mi

Time Zone

Eastern Time

From Endurance Grid

Line up lodging and travel early to lock in your race weekend.

Race Location

Your Next Start Line

What Are You
Waiting For?

Every finish line starts with a single decision. Claim your spot at Tri Millennium, put it on the calendar, and turn “someday” into a start date.

1

Day to train

Race
Tri Millennium
Date
July 24–25, 2026

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From Endurance Grid

About These Sports

This race spans more than one sport — here’s a guide to each, so you can understand what’s involved and decide if it’s the right fit. For course distances, logistics, and race-day specifics, always defer to the race organizer’s event page.

Triathlon

Swim, bike, run — back to back. The sprint distance makes it far more accessible than most people think. Three sports in one race means three movements to train and race day never gets monotonous.

Aquabike

A swim followed by a bike — a triathlon without the run. Sprint and Olympic distances, often alongside a tri at the same venue.

Duathlon

Run, bike, run. The multi-sport format without the swim. Two disciplines, one race — a great bridge between running and triathlon.

Plan your trip

Make it a Racecation

Coming from out of town? There's more to Walker than race day. We'll help you line up nearby lodging, flights, a rental car, and things to do so you can make the most of your racecation.

Plan your trip to Walker
Lodging
Flights
Rental Car
Activities

Frequently Asked Questions (FAQs)

What is the Tri Millennium?+
Tri Millennium is a triathlon, aquabike, and duathlon race held in Walker, Michigan on July 24, 2026. It is one of the many endurance events listed on Endurance Grid, a multi-sport endurance event calendar covering running races, triathlons, HYROX, and more endurance sports across the United States. Find more triathlon races near you or explore our sports guides to learn what race day actually feels like.
When and where is the Tri Millennium?+
Friday, July 24, 2026 in Walker, Michigan at 1400 Maynard Ave SW. Check the event page for exact start times and wave schedules.
How do I register for the Tri Millennium?+
Registration is handled through the event's registration page. Confirm pricing and distances there, and sign up.

Tri Millennium

Jul 24, 2026

Register →