Wisconsin ANVIL Ultra Triathlon
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Wisconsin ANVIL Ultra Triathlon
The Wisconsin ANVIL Ultra Triathlon is a multi-format endurance event held at Ottawa Lake State Park in Dousman, Wisconsin and organized by Mammoth Endurance. The event weekend spans early September 2026, with setup beginning on September 9 and race days occurring across September 10 to September 12. Registration closes September 6, 2026.
The course uses short, repeatable loops inside and just outside the state park to provide frequent support and consolidated spectator areas. An on-course Aid Station and Athlete Village serve each loop, allowing personal crew access for refueling, gear changes, and assistance. The event provides real food at aid stations and a 24-hour on-site medical team. Volunteers and community support are present throughout the course to assist athlete safety and logistics.
Multiple race formats are offered, including individual, multi-day, relay, and alternative-discipline options. Entry options vary in fee and structure; published entry fees range from $422.84 to $2,823.06 (USD) with multiple available offer types.
Organizers also list preparatory resources tied to the event, such as nutrition and hydration guidance, training plans, sponsor discounts and giveaways, and community calls. The event emphasizes structured support services before, during, and after race weekend to assist athletes and their crews. Visit the organization's website for the most recent information.
