Wisconsin ANVIL Ultra Triathlon
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Wisconsin ANVIL Ultra Triathlon
The Wisconsin ANVIL Ultra Triathlon is a multi day ultra endurance triathlon held in early September 2026 at Ottawa Lake State Park near Dousman, Wisconsin. The event is organized by Mammoth Endurance and includes multiple continuous distance formats over the race weekend.
Event formats include:
- Triple ANVIL, typically 1.5x or more full distance triathlon
- Double and Single multi continuous distance triathlons
- Half distance triathlon
The course uses short, repeatable loops within and just outside Ottawa Lake State Park to keep athletes close to aid and support. An on course Aid Station and Athlete Village allow access to a personal crew every loop for refueling and gear changes. The event provides real food options and a 24 hour on site medical team.
Organizers provide preparatory resources such as guidance on nutrition and hydration, training plans, sponsor discounts, and community calls. Registration for the event closes on September 6, 2026 at 11:59 PM CT. The format and support model emphasize frequent aid, crew access, and continuous oversight during the race weekend. Visit the organization's website for the most recent information.
