HalfRuns
Tri Millennium

Tri Millennium

West Michigan's longest-standing multi-sport event offers a fast, flat run through Millennium Park.

Race Date

Jul 24, 2026

Location

Walker, MI

Quick facts

Date
Friday, July 24, 2026
Location
Walker, Michigan
Distance
Half marathon (13.1 mi) + 15.9 Miles, 18.6 Miles, 31.93 Miles, 37.2 Miles, 25.6 Miles, 2 Miles, Kids Tri (Ages 9-11), 4 Miles
Course
Loop Course
Terrain
Road
USATF certified
Not listed

Highlights

Good For

Beginner FriendlyPR Friendly

Atmosphere

Local CommunityWell OrganizedGreat Swag

Course

Fast Flat

The Experience

Tri Millennium is a beloved West Michigan institution, drawing athletes for its fast, flat run course through the scenic Millennium Park in Grand Rapids. This event, a staple for local competitors, also welcomes participants from across the region looking for a well-organized race.

The park's paved trails offer a forgiving surface, ideal for setting personal bests. The surrounding roads, while noted as having rolling terrain for the bike leg, complement the overall fast-and-flat character of the run, making it a prime location for both seasoned athletes and those taking on their first multi-sport challenge.

With professional timing and a dedicated team of volunteers, Tri Millennium ensures a smooth race day experience. The event proudly supports Bridge Street Ministries, a local youth organization, with 100% of donations contributing to their vital work in the Grand Rapids community.

Race-provided description

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.

Logistics

Race Day

Friday, July 24, 2026

Start Time

7:15 AM

Giveaway

T-Shirt

Start Location

1400 Maynard Ave SW, Walker, MI, 49534

Directions

Course Info

Course Type

Loop Course

Terrain

road

Scenery

Park

Surface

Paved

Difficulty

Ultra-Flat

Net Drop/km

0 m (Flat)

Separation

0.0%

Also Offers

15.9 Miles18.6 Miles31.93 Miles37.2 Miles25.6 Miles2 MilesKids Tri (Ages 9-11)4 Miles

Quality Score

Methodology
Heritage0/20

first year

Size0/15

no finisher counts yet

Momentum3/5

small race — neutral

Loyalty0/20

needs a few years of results

Course & details8/15

3 timing sources · 8 photos

National draw0/10

no finisher data yet

Front-pack speed0/5

no winner time yet

Weather0/10

typical high 83°F

Race Day Weather

5-year historical avg

Start (Low)

64°

Afternoon (High)

83°

Hot conditions — adjust pace expectations, prioritize hydration

0.1"

Precipitation

10 mph

Wind

70%

Humidity

Race Photos

Frequently asked

When is the Tri Millennium?

The Tri Millennium is held on Friday, July 24, 2026, starting at 7:15 AM.

Where does the Tri Millennium take place?

It takes place in Walker, Michigan.

What distances does the Tri Millennium offer?

The half marathon (13.1 miles), plus 15.9 Miles, 18.6 Miles, 31.93 Miles, 37.2 Miles, 25.6 Miles, 2 Miles, Kids Tri (Ages 9-11), 4 Miles.

Is the Tri Millennium course flat and good for a PR?

The Tri Millennium is a ultra-flat, loop course course.

HalfRuns editorial — independent, no paid placement.

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