The Dirty Mitten Gravel Triathlon

SEP
20
2026
The Dirty Mitten Gravel Triathlon is a multisport event based at Camp Manitou-lin in Michigan. It features sprint and Olympic distance options, including triathlon, duathlon, aquabike, and relay formats. A virtual participation option is also available.
Sun 20 Sep 2026
The Shorty Relay (sprint) The Long One Relay (olymp... The Shorty Triathlon (spr... The Shorty Duathlon (spri... The Shorty Aquabike (spri...

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Event Overview

The Dirty Mitten Gravel Triathlon takes place at Camp Manitou-lin in Middleville, Michigan. The event offers multiple gravel multisport race formats across two main distance categories, plus a virtual participation option.

Distances and Events

Competitors can choose from nine total events. The two categories are:

  • The Shorty: A sprint-distance series.
  • The Long One: An Olympic-distance series.

Each category includes variations: triathlon, aquabike, duathlon, and relay options for two or three people. A separate virtual event is also available.

Event Details

The swim segment is typically wetsuit legal, with an average water temperature noted as 67°F (19°C). Average air temperatures for the area in September are listed as 54°F (12°C) to 70°F (21°C).

The event is organized by Tris4Health, which also produces other triathlons, gravel bike races, and running events. Visit the organization's website for the most recent information.

40 mi
The Long One Relay (olympic)
18 mi
The Shorty Relay (sprint)
The Shorty Triathlon (sprint)
The Shorty Duathlon (sprint)
The Shorty Aquabike (sprint)
The Long One Triathlon (olympic)
The Long One Duathlon (olympic)
The Long One Aquabike (olympic)
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