The Dirty Mitten Gravel Bike Race

Want to lower race costs? Volunteer!

At most Tris4Health and Boundless Race & Ride Company events, volunteering earns vouchers for future races. Choose a shift, register, and rack up vouchers—values depend on the role, and you can combine them at checkout.

You have a lot of racing shirts.  Don’t need another one?  Select the shirtless option during the registration process to save $5.  It’s not much, but it all adds up!

Do you know anyone else who wants to race?  Refer 5 people to the race and we will refund you $20 automatically.  It’s as simple as that.  For instructions on how to use your referral links, please follow these instructions.

 Anyone under 19 races for a flat $35, no tiers.

We love seeing young athletes jump in—even when they’re faster than us. If you can, please register early; it helps us plan and avoid over-ordering swag.

Riding is better with friends!

Reach out for a team discount if you’re bringing a group of 5 or more!  For full details of our team program, please visit this link.

Racing costs are up—you feel it, we do, too. If pricing is out of reach (job change, big family, waited too long to sign up, whatever), tell us what you can afford—even if it’s $0—and we’ll work something out. No judgment, no questions. We believe people are good and sometimes need a hand. We do reserve the right to limit free or reduced entries, but we’ve offered this for years at The Dirty Mitten without issues.

• Early Bird (11/10 – 11/16)
• Tier 1 (11/17 – 2/22)
• Tier 2 (2/23 – 6/7)
• Tier 3 (6/8 – 9/13)
• Tier 4 (9/14 – 9/18)

Please visit the RunSignup registration page to see exact pricing.  Select the Registration Details option under the event you’re interested in.

Please read all of the information below before registering. 

• This race is subject to Boundless Race & Ride Company’s Risk-Free Racing Policy.
• Refunds are available 60 days or more before the date of your race.
• Between 60 days and 1 week out from event, you can defer your entry and claim a voucher/credit towards a future Boundless Race & Ride Company or Tris4Health event worth the value of your original entry fee (minus any fees from the registration platform).  This must be used within 1 year of your original purchase date.
• In the event the Event is delayed, modified or cancelled for any reason, including but not limited to acts of God or the elements (including without limitation, wind, rough water, rain, hail, lightning, hurricane, tornado, earthquake), acts of terrorism, fire, or any other cause beyond the control of Boundless Race & Ride Company, there shall be no refund of the entry fee or any other costs incurred in connection with the Event.
• Transfers to a higher-priced race at the same event are acceptable, but will require paying the price difference. Transfers to lower-priced races at the same event are acceptable, but you will not receive a refund. Email info@tris4health.com to request the transfer.

Boundless Race & Ride Company reserves the right to modify the maximum number of participants in each race.

“Boundless Race & Ride Company” is a new cycling-focused brand under Michigan Endurance Holdings, LLC, which also owns the “Tris4Health” brand.

Since its inception in 2011 with only two multisport events, Michigan Endurance Holdings has grown to produce over 20 events each year. All our cycling events are organized under the Boundless Race & Ride Company brand. We maintain the same team and standards as before, but with a specific focus on races and rides featuring two wheels.

The Elite category is designed for riders who want to test themselves against the strongest field in the Boundless Race & Ride Company Grand Prix. To earn series points toward the Elite title, you must register in the Elite category at each event. We’ve mixed in select race distances across the series to reveal the most complete, all-around cyclist.

• Participant shirt (custom tri-blend t-shirt)
• Finisher Medal
• Free entry into the Boundless Race & Ride Company Grand Prix
• Customized (small!) number plate with chip timing by SportStats
• Well-marked course with volunteers and police at pre-determined intersections
• Aid Stations (depending on distance)
• Killer awards and prizes

New for 2026: We’re standardizing award categories across every race. Age-group awards will now be in 5-year increments for men and women at all distances. We’re also recognizing Clydesdale, Athena, Single Speed, and Fat Bike across every distance. Age groups will be based on your age at the end of the year to keep things consistent across all events for scoring.

Awards go to the top three in each category—except Elite, which recognizes the top five.

Looking to race at the sharp end? The Elite wave is designed for our most competitive athletes. Expect prize money at every event, plus a larger cash purse for Elite racers at the Grand Prix.

Elite Prize Money (M/F)

• 1st – $500
• 2nd – $200
• 3rd – $100
• 4th – $50
• 5th – $25

Age Groups

• 10-14
• 15-19
• 20-24
• 25-29
• 30-34
• 35-39
• 40-44
• 45-49
• 50-54
• 55-59
• 60-64
• 65-69
• 70-74
• 75-79
• 80+

In the event of an emergency or if we need to communicate important information on event day, please stay tuned to our social media accounts on Facebook and Instagram, as well as your email and venue PA announcements.

Upon finishing, athletes can expect to receive the following at the post-race food tent: bananas, oranges, cookies, bagels, and chips. Gatorade, water, and Pepsi products will also be distributed at the finish line.

It depends on the road and weather conditions, but most years we would recommend something in the 700×34-50c range or a fast rolling 29″ tire if you’re on a mountain bike.

The course closes at 3:00pm

The weather from the last few years can be found below:

2025

• 9am – 64.9 degrees, with 6.90 mph wind.
• 12pm – 70.0 degrees with 12.7 mph wind.
• 3pm – 77.0 degrees with 15 mph wind.

2024

• 9am – 68.0 degrees, with 5.75 mph wind.
• 12pm – 73.9 degrees with 5.75 mph wind.
• 3pm – 66.9 degrees with 6.9 mph wind.

2023

• 9am – 63.0 degrees, with 3.45 mph wind.
• 12pm – 75.9 degrees with 8.06 mph wind.
• 3pm – 81.0 degrees with 12.7 mph wind.

This event is held at the YMCA Camp Manitou-Lin.

1095 N Briggs Road
Middleville, MI 49333

Parking is available on-site.