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SAVE 20% ON REGISTRATION UNTIL APRIL 30th

Starting now! SAVE 20% off the WISCONSIN ANVIL and VIRGINIA ANVIL for the first 25 people (Only 8 spots left!!)  who use the code: MAMMOTH20 at checkout. Coupon is valid for ALL distances (except a single anvil) and is only valid until April 30th or until 25 people have registered for the events. 

This wouldn’t be possible without the amazing support of some sponsors who Love ultra-triathlon and love seeing you accomplish your goals.

DO NOT WAIT to signup - once it’s gone it’s gone!

Reinforcing The Endless Pursuit Of Self Realization

Since 1985 | Home of the original Ultra-Triathlon.

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Welcome to MAMMOTH!

Floria ANVIL
Florida ANVIL Ultra Triathlon
February 20 - 23, 2025
Clermont, FL • Lake Louisa State Park


Double World Championships + 1.5x / 1x
Floria ANVIL
Washington Island Ultra Relay
July 25 - 27, 2024
Washington Island, WI • Gislason Beach


36 / 24 / 12 Hour Format
Floria ANVIL
Wisconsin ANVIL Ultra Triathlon
September 4 - 20, 2024
Dousman, WI • Ottawa Lake State Park


10x / 5x / 4x / 3x / 2x / 1x
Floria ANVIL
Hagg Lake Ultra Relay
June 6 - 8, 2024
Gaston, OR • Henry Hagg Lake


36 / 24 / 12 Hour Format
Floria ANVIL
Virginia ANVIL Ultra Triathlon
October 10 - 13, 2024
Spotsylvania, VA • Lake Anna State Park


2x / 1x
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Award winning films. We tell stories - vulnerable, incredible, inspiring stories.

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You Were Born To Be Different.

We speak to the men and women who lead uncommon lifestyles while striving for bigger, bolder goals. We learn from their mistakes, their successes and find inspiration to continue refining ourselves into who we strive to be.

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OFFICIAL MAMMOTH GEAR

There's more to life than training and finishing a race. Wear our gear as a reminder to work hard for what you want. To care of the people around you and place their needs above your own. Finish what you start, be a person of character and live with intention and integrity. The race is only a small part of your story.
Go on, leave your legacy.

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MAMMOTH PARTNERS

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