The Dirty Mitten Gravel Triathlon

About the Event

THE DIRTY MITTEN IS PROUD TO BE THE 2026 GRAVEL WORLD CHAMPIONSHIP OF THE UNIVERSE (yeah, we made that up, but the event is so good we are sticking with it)!

Based out of Camp Manitou-lin in Middleville, MI, The Dirty Mitten offers a beginner friendly sprint option (The Shorty), and a more challenging Olympic (The Long One) course.

9 EVENTS TO CHOOSE FROM: 4 events at each distance: The Shorty (sprintish), The Long One (olympicish), both feature triathlon, aquabike, duathlon and relay... plus you can join us virtually!

TO DO: Frederick Meijer Garden & Sculpture Park, John Ball Zoo, Gerald R. Ford Presidential Library & Museum

AIRPORT: Gerald R Ford International Airport

AIR TEMP (AVG): 54 F / 70 F

WATER TEMP (AVG): 67 F and wetsuit legal

We think we are awesome but will admit we are biased. Check out our athlete's forum to ask questions from those who have already experienced the awesomeness that is The Dirty Mitten!

Races Offered

The Dirty Mitten Virtual

Sep 20, 2026

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Distance — The Dirty Mitten Virtual

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Type — Water sports

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08:30

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$69.00

The Long One Aquabike (Olympic)

Sep 20, 2026

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Distance — 33.5 Miles

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Type — Water sports

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08:30

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$129.00

The Long One Duathlon (Olympic)

Sep 20, 2026

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Distance — 42 Miles

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Type — Water sports

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08:30

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$129.00

The Long One Relay - 2 Person (Olympic)

Sep 20, 2026

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Distance — 39.5 Miles

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Type — Water sports

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08:30

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$97.00

The Long One Relay - 3 Person (Olympic)

Sep 20, 2026

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Distance — 39.5 Miles

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Type — Water sports

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08:30

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$64.67

The Long One Triathlon (Olympic)

Sep 20, 2026

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Distance — 39.5 Miles

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Type — Water sports

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08:30

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$129.00

The Shorty Aquabike (Sprint)

Sep 20, 2026

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Distance — 14.5 Miles

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Type — Water sports

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09:00

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$99.00

The Shorty Duathlon (Sprint)

Sep 20, 2026

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Distance — 20 Miles

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Type — Water sports

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09:00

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$99.00

The Shorty Relay - 2 person (Sprint)

Sep 20, 2026

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Distance — 17.5 Miles

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Type — Water sports

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09:00

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$59.50

The Shorty Relay - 3 person (Sprint)

Sep 20, 2026

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Distance — 17.5 Miles

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Type — Water sports

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09:00

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$46.33

The Shorty Triathlon (Sprint)

Sep 20, 2026

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Distance — 17.5 Miles

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Type — Water sports

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09:00

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$99.00

Weather History

These values represent the 3-year monthly averages for September in Middleville.

thermostat Temperature

13.7° / 24.1°

wb_sunny Feels like

12.5° / 23.0°

light_mode Avg sunshine hours

9h 46m

water_drop Avg rainfall

1.4 mm

ac_unit Avg snowfall

—

air Avg wind speed

9.6 km/h (Light breeze)

opacity Sweat loss rate

Moderate

terrain Course conditions

Firm and slightly soft

sunny Max UV Index

Moderate (5.0)

humidity_mid Humidity

72.1%

wb_twilight Sunrise

07:22

nightlight Sunset

19:50

About Middleville

Learn more about the host city, Middleville.

Middleville is a village in Thornapple Township, Barry County, in the U.S. state of Michigan. Middleville is part of the Grand Rapids metropolitan area. The population was 4,295 at the 2020 census.