Wisconsin ANVIL Ultra Triathlon

SEP
9
2026
Test your limits at the Wisconsin ANVIL Ultra Triathlon in Ottawa Lake State Park. Experience a unique looped course with constant crew access and 24 hour support in a community focused endurance environment.
Wed 9 Sep 2026
Half Anvil (half Distance... Anvil [1.5x or More Full... Single Anvil (full Triath...

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Ultra-Endurance Triathlon in Wisconsin

The Wisconsin ANVIL Ultra Triathlon takes place at the Ottawa Lake State Park in Dousman, Wisconsin. This endurance event is organized within the Kettle Moraine region and focuses on multi-distance triathlon formats that exceed standard distances. The competition utilizes a course designed around short, repeatable loops located within and immediately outside the state park boundaries.

Participants move through a layout that emphasizes safety and consistent support. The central hub of the event is the Athlete Village and on-course aid station. Because of the looped course design, athletes pass their personal support crews and the main fueling area during every lap. This setup allows for frequent gear adjustments and regular access to nutrition.

Support services provided during the event include:

  • An on-site medical team available 24 hours a day.
  • An aid station providing prepared food.
  • Access to an Athlete Village for crews and participants.

The event offers several distance options based on full triathlon lengths:

  • Half distance triathlon
  • Full distance triathlon
  • ANVIL (1.5x or more full distance triathlon)

The event remains open to athletes and focuses on building a community environment. Registration typically closes a few days before the event date, and the course is supported by local park authorities and townships to maintain the racing environment. Visit the organization's website for the most recent information.

70 mi
Half Anvil (half Distance)
Anvil [1.5x or More Full Distance Triathlon]
Single Anvil (full Triathlon)
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