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


U.S.A. ANVIL ULTRA TRIATHLON
Welcome to the longest, most grueling organized triathlon event in the United States. From a 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.


Governing Bodies
To ensure fair and equal rules for all participants, this event is sanctioned by the World Ultra Triathlon Association (WUTA) and by USA Triathlon (USAT). We are not sanctioned by the IUTA, however, finishers results are sent and published to their website.


Split Payments
We understand the financial commitment it takes to register for an event of this distance. We do offer options for payments. If you need to make split payments, please email craig@mammothendurance.com and let him know which option you prefer.
*please note: these race payment options are only available for those races with a registration fee over $2,500.

Option 1: Pay half now and half no later than 60 days out from the event.
Option 2: Pay 1/3 now, 1/3 no later than 120 days out from the event and the final 1/3 no later than 60 days out from the event.