
Tri Millennium is a triathlon, aquabike, and duathlon race on July 24–25, 2026 in Walker, MI, with entry fees from $45 to $139.
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
Weather
Live forecast from the U.S. National Weather Service.
Race Day 1
Friday, 7/24
High
82°
Low
59°
Mostly sunny
Race Day 2
Saturday, 7/25
High
83°
Low
68°
Mostly sunny
Host City
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
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From Endurance Grid
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.
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.
A swim followed by a bike — a triathlon without the run. Sprint and Olympic distances, often alongside a tri at the same venue.
Run, bike, run. The multi-sport format without the swim. Two disciplines, one race — a great bridge between running and triathlon.
Coming Up
myTEAM TRIUMPH West MI - Tri Millennium Sprint -- Captain & Angel Registration
Less than a mile away
Tamarac Tri
38 miles away
Cereal City KIDS Triathlon
55 miles away
myTEAM TRIUMPH West MI - MiTi Tri -- Captain & Angel Registration
9 miles away
Plan your trip
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 WalkerFrequently Asked Questions (FAQs)
Tri Millennium
Jul 24, 2026