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Wisconsin ANVIL Ultra Triathlon

Mon September 8 - Sat September 13, 2025 Dousman, WI 53118 US Directions
FINISH WHAT YOU START
Countdown to Race Day

Events

703 Miles

Solo Quintuple ANVIL (5x)

$2,750 09/08 - 09/13 7:00AM CDT - 7:00PM CDT Registration ends July 31, 2025 at 11:59pm CDT
421.8 Miles

Solo Triple ANVIL (3x)

$1,500 09/11 - 09/13 7:00AM CDT - 7:00PM CDT Registration ends July 31, 2025 at 11:59pm CDT
281.2 Miles

Solo Double ANVIL (2x)

$1,200 09/11 - 09/12 7:00AM CDT - 7:00PM CDT Registration ends July 31, 2025 at 11:59pm CDT
210.9 Miles

Solo 1.5x ANVIL (1.5x)

$1,200 09/11 - 09/12 8:00AM CDT - 6:00PM CDT Registration ends July 31, 2025 at 11:59pm CDT
140.6 Miles

Solo Single ANVIL (1x)

$850 09/11 7:00AM CDT - 11:59PM CDT Registration ends July 31, 2025 at 11:59pm CDT

Solo 1x5 (1 per day)

$2,750 09/08 - 09/12 7:00AM CDT - 7:00AM CDT Registration ends July 31, 2025 at 11:59pm CDT

Solo 1x3 (1 per day)

$1,500 09/11 - 09/13 7:00AM CDT - 3:00AM CDT Registration ends July 31, 2025 at 11:59pm CDT

Relay - Quintuple ANVIL (5x)

$1,500 09/08 - 09/13 7:00AM CDT - 7:00PM CDT Registration ends July 31, 2025 at 11:59pm CDT

Race Website

Additional race information can be found at https://www.mammothendurance.com.

Place

Ottawa Lake Recreation Area
Dousman, WI US 53118

Description

Race Website: https://www.mammothendurance.com
* this race website is the ONLY place you will find authentic details for the Wisconsin ANVIL.


MAMMOTH ENDURANCE
We Organize The Longest Triathlons In The USA. From the 1.5x distance ANVIL (210.9 miles) to the DECA ANVIL (1,406 miles), there's a distance for everyone who wants to push further and find out more about themselves. If you need that extra nudge, call one of us. Our phone numbers are listed on the website. For a lot of you, this is the step that will open up a brand new life of possibilities and allow you to see yourself as you should. You can do more than you think you can. The biggest step is signing up. Yea, it'll tear you down... Yea, it'll be worth it.


The Best of the Best
Mammoth Endurance
is the premier race company organizing races longer than an Ironman Distance Triathlon. We cut no corners. You can expect a high level event with attention to the smallest of details. We have over 45 years of experience producing ultra triathlons, adventure races, ultra runs, 5Ks, marathons, sprint and olympic distance triathlons, and everything in between. It takes a different kind of Race Director and Race Crew to pull off the events we do year after year. Our team is the best, period. We work tirelessly to stand behind that sentence and we're proud of that. You can feel confident knowing the event will run smoothly. Your job is to race, and that's all you'll need to worry about. Let's get it done.


Race Contact Info

If you have any questions about this race, click the button below.

Directions

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