Swim to the Moon Open Water Swim Festival

Join us as we kick off the Traffic Jam'in Festival with a flat, scenic 5k run and 5k walk around the lake and nearby neighborhood. Finish strong in front of our community Events Park Pavilion while listening to live music! Water station at the 1/2 way mark and refreshments and award ceremony following the 5K. Music on the course!

Start time for the 5k Run and 5k Walk is 7:30 pm

Mile Start time is 7 pm

Pricing: 5k run, 5k walk and Virtual 5k: Special New Years Day pricing $20 valid 1/1 to 1/15, then $25 until 5/10, $30 from 5/11 to 7/05. $35 7/06 to 7/10. 1 mile family fun run: $5

Medals and complimentary beverage for all 5K finishers. (image of medal below)

Overall Awards will be given to the top male and female finishers of Open (all ages), and Masters (40+), Senior Masters (60+) in the 5k Run, and 5k Walk.

Age Groups Awards to the top 3 places in each age group: Awards will be made by local artisans from the Grass Lake area.

5k Run age groups: 0-12, 13-14, 15-17, 18-24, 25-29, 30-34, 35-39, 40-44, 45-49, 50-54, 55-59, 60-64, 65-69. 70-74, 75-79, 80-84, 85+

5k Walk age groups: 0-19, 20-29, 30-39, 40-49, 50-59, 60-69, 70+

Back by popular demand, local homemade treats after the races! These cookies were a HUGE hit last year and we are SO excited to have them back again this year. YUM!

Tech style t-shirts again this year in both Men and Women sizes! Shirts guaranteed to registrations received by 6/19. Shirts available as supplies last after that date.

Packet Pickup information:

Early packet pickup Thursday, July 9th: From 4-8pm at the Village of Grass Lake offices, 119 N. Lake Street, Grass Lake, MI 49240

Race day Friday, July 10th: From 5 to 6:30 pm at the starting area of the race.

Be sure to pre-register for the race! There is no on site race day registration. On-line registration will remain open until 6:30 pm on Friday July 10th.

Team Discount: Form a Team of 4 or more and receive a $5 per person team discount. Team members 1-3 will receive a $5 refund once member 4 joins. Member 4+ will automatically pay $5 less. Join in the fun! Team discounts apply after the New Year special pricing ends, no team discounts 1/1 thru 1/15.

Race day parking: Festival guests can park in the following locations:

Michigan Ave. downtown Grass Lake

Village Parking Lot between Drake St. and S. Lake St.

Grass Lake County Park

1st Methodist and Federated Church Parking Lots at Michigan Ave. and Lafayette St.

Stone's 1 Stop Auto

Grass Lake Township Office lot

Production Realty Office - 230 W. Michigan Ave.

Special parking for event participants provided by our Title Sponsor - The Lost Railway Museum. Please use the lot across the street from the Lost Railway Museum on Michigan Ave.

Please note there are no dogs permitted at this event. Service dogs excluded. Please see the full policy under Race Info. This is for the safety of both our participants and your dogs. Thank you.

The race will be professionally timed by the Michigan Running Foundation. Results will be live during the race and posted on this site.

Since 1986, the iconic and classic Ann Arbor Tri has been held in the Pinckney Recreation Area at Halfmoon Lake, one of the largest state parks in all of Michigan. You’ll swim the open waters of Halfmoon, bike the rolling paved country roads of the surrounding rural area, and then run the Potowatomi Trail. It’s a classic course you’ll come back to again and again.

Choose Your Challenge!

Olympic Triathlon — 1500 meter swim (64 lengths in a standard metric pool), 28-mile paved road bike, 5.3-mile trail run (Yes, it's really an Olympic: (USAT Distances Defined)

Sprint Triathlon — 750-meter swim (32 lengths in a standard metric pool),14-mile paved road bike, 3.5 mile trail run

Olympic Aquabike (swim bike done) — 1500 meter swim, 28-mile paved road bike

Sprint Duathlon — 2-mile paved run, 14-mile paved road bike, 3.5 mile trail run

Olympic Relay — team up with one or two friends to complete our Olympic Triathlon together

Sprint Relay — team up with one or two friends to complete our Sprint Triathlon together

Park Entry

A State Park permit or Recreation Passport is needed to enter Pinckney Recreation Area. Visit the Michigan Department of Natural Resources here for pricing and more information.

Host Club

The Ann Arbor Tri Club and the University of Michigan Tri Team will be your host clubs for this event. We are grateful to them for providing volunteers and bringing sharing their passion, dedication, and spirit to the Ann Arbor Tri!

To learn more about Ann Arbor Tri Club, CLICK HERE.

To learn more about The University of Michigan Tri Team CLICK HERE.

To learn more about our club sponsorship program, CLICK HERE.

Course

Please note that in the interest of safety, all courses are subject to change at any time at the discretion of the race director.

750m Swim Course Map (2x for Oly)

Duathlon 1st Leg

Sprint Bike Course Map

Olympic Bike Course Map

Sprint and Mini Run Course

Olympic Run Course

USA Triathlon Distance Defined

Start Times

While start times are noted in the event information, all start times are subject to change. All participants must be at the mandatory race meeting on the beach at 7:15 AM and ready to race by 7:30 AM. An official race schedule will be sent in the pre-race information.

Post-Race Party

Stick around post race for food and festivities! Our Epic staff and volunteers will be cooking up pancakes, breakfast burritos, and more for race participants.

Zero Waste

The event is a Leave No Trace event. Learn more about our race-day recycling and composting efforts here. Want more information about running a great race and leaving no trace? Click here to visit Happy Planet Running!

→ Read the 2023 Ann Arbor Tri sustainability report here!

Join us for the Heatwave Half Marathon, 10K, & 5K!

A sun-soaked summer challenge that’s perfect for the whole family.

The fun includes –

• Great Swag – designer shirt & custom medal

• Chip-timing with live results and awards

• Free photos

• FREE ice cream at the finish to help you cool off

• Plenty of hot fun in the summer sun!

Grab your friends and family—you won’t want to miss this one!

Can’t make the race? No problem! We offer a virtual race option where you can run anywhere, at any time, and still earn the fun swag!

Youth-based pricing is available: ages 12 & under are only $17!

Half Marathon/10K/5K registration includes a custom bib, designer shirt, and an awesome finisher medal!

1 Mile registration is untimed and includes a custom bib, designer shirt, and an awesome finisher medal!

Kid’s Dash is a fun, untimed dash for ages 10 and under. Registration includes a mini bib, youth-sized shirt, and a specially crafted medal for our youngest runners! (If your child wants to run the kid’s dash without swag, they’re welcome to run free on race day!)

Register by midnight on Thursday, two Thursdays before race day, to guarantee your shirt!

We are excited for our 4th annual Larry Prout Jr (The Bear) Courage Fund 5k and 1 mile run/walk fundraiser! This year's race will be held on Saturday, July 25th.

Proceeds from this event assist University of Michigan Mott Children's Hospital families whose loved ones are enduring complex medical issues with gas, food, utilities, clothes, emergency auto and home repairs, and many other basic necessities, that become hardships when a family is facing the medical crisis of a loved one.

PRICING 5K: $30 until July 12th. $35 from 7/13 to 7/24. $40 on race day. Online registration only on race day.

FAMILY/FRIENDS special pricing: $3/person discount when registering 3 or more people at the same time. Discount automatically applied during registration. Valid only for the 5k. Valid until 7/12.

PRICING 1 MILE: $25 until 7/12. $30 from 7/13 to 7/24. $35 on race day. Online registration only on race day.

T-shirts are guaranteed with entry by end of day July 12th. Supplies available as they last after that date.

Do you want to RUN FOR FREE? See details HERE.

COURSE: This year we'll be at the Pinckney High School complex. It features a beautiful course. More details coming soon.

PACKET PICKUP: Race day morning Jul7 25th, 8:00 am to 9:50 am at the Registration/Check-in Tent. Race packets include: event and sponsor information, race t-shirt, and bib

VIRTUAL RUNNERS: Register by July 12th to be guaranteed a t-shirt. Price is $30. Your packet (including t-shirt and event and sponsor information) will be mailed as the race approaches. You can post your results by going to the results tab at the top of the page and selecting virtual results. Results must be submitted August 1st.

RESULTS will be live during the race and posted on this website. The race will be professionally timed by the Michigan Running Foundation.

The 2026 Unified 5k and AdaptXpo is an inclusive road race and adaptive sports expo designed so that everyone can participate, whether they run, walk, row, or roll. The event raises critical funds for AdaptX education, research, community events, fitness programming, and grant initiatives. The Unified 5k is a space where athletes with and without disabilities show up together, challenge perceptions, and prove that fitness and sport are more meaningful when everyone has a place at the starting line.

Join us on August 30th at Hudson Mills for our 2nd annual Unified 5k in Dexter, MI. Participants have the opportunity to run, walk, roll, or row either the 5k (3.1 mile) or 1 Mile course. Arrive early or hang around after the event to check out our vendors and clinics at the AdaptXpo, a celebration of organizations that focus on health, inclusion, accessibility, assistive technology, and adaptive sports.

Help us make fitness and physical activity accessible for every body.