2026 Wisconsin ANVIL Ultra Triathlon

September 9 -12 | Ottawa lake | Kettle Moraine

Registration

All race registrations are completed online. We do not accept paper forms, do not offer race day registrations and do not accept payment from other services like PayPal or Venmo. You may register online by clicking here.

All Double ANVIL athletes (solo and team) are required to have our Medical Release Form signed by a licensed doctor. This form must be submitted to our race director via email one month prior to the race start.

Athletes may download the Medical Release Form here.

Close-up of a person in a wetsuit holding a yellow Olympic-style swimming cap and a pair of goggles, preparing for swimming.
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Medical Form

Race Categories

  • Wisconsin ANVIL | September 9 -12

    Single Anvil Triathlon

    1.5x Anvil Triathlon

    Double Anvil Triathlon

    Triple Anvil Triathlon

Sunset over a large river with a boat and floating markers, with a forested shoreline in the distance.
A cyclist wearing a white helmet and striped shirt riding a black bike on a winding road with autumn trees.
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COURSE INFORMATION

Our courses consist of shorter loops inside a controlled area. The distance of our events require extra safety measures be taken to ensure athletes are cared for and able to receive medical help if needed while on course. These shorter loops allow for your family or crew to be much more involved in your race, resulting in an overall more enjoyable experience for athletes and their support crew.

The courses are inside a state park and are well marked / manned by volunteers during the event. Try it before you bash it - we guarantee you’ll find the shorter loops helpful and more enjoyable during your event.

A cyclist riding on an empty rural road during sunset with grassy fields and trees in the background.
A person riding a bicycle on a winding country road surrounded by grassy fields and distant trees.
Two cyclists riding on a paved road through a flat, grassy landscape with trees on the left side and a distant horizon under an overcast sky.
A winding country road through a rural landscape with trees and fields during sunset.
A person kayaking on dark blue water, viewed from above.

Swim Course Details

5x: 60 loops / Triple: 36 loops / Double: 24 loops / 1.5x: 18 loops

The Swim course is a 0.20 mile loop (1056 feet/322 meters). We will be swimming in an open water, non-motorized lake for all race categories. Athletes will call out their race number to our timers on the beach in between each lap. Multiple floating stations will be available to athletes allowing you to leave hydration and food for easy access during the swim.

Each athlete will be given, and is required to wear, a swim cap to wear during the swim. To be used, worn throughout the swim.

Lifeguards and volunteer kayakers will be present on the water throughout the entirety of the swim.

The water temperature at this time of year is typically a comfortable 70 - 72 degrees Fahrenheit. The lake water is mostly clear with a sandy bottom. You'll see fish and turtles under water during your swim. There are some weeds on the north side of the lake but our swim course stays south, closest to the beach, avoiding the weedy areas of the lake. 

BIKE COURSE DETAILS

5x: 100 loops / Triple: 60 loops / Double: 40 loops / 1.5x: 30 loops

The bike course is an open road, out and back course on newly paved roads. The course is designed to be easy on the athlete with minimal hills and a very smooth road surface to ride on. At the end of the course, riders will make a 180-degree turn to make their way back to the race village. Volunteers will be present on course throughout the entirety of the event. We will have a restroom available at the bike turnaround. 

All riders are required to have a white headlight and red rear light on their bike while riding in the overnight hours.

The bike course is on open roads meaning you will encounter light vehicle traffic. Signage will be placed along the roadway to notify motorists of the event.

The bike segment is a 5.58 mile (8.890 kilometer) out and back. You will start the bike in the village area.

We have calibrated the course with the same measuring equipment used by the Olympic committee (it is called a Jones Counter) so we are accurate on the mileage. Remember, GPS data from your watch, with long distances and multiple loops, will often be incorrect over time. Our courses are carefully marked and measured. Do not rely on your satellite GPS watch as an accurate measurement.

1.5x athletes will complete one short loop (0.60 miles) before completing 30 full loops. 2x athletes will complete one short loop (0.80 miles) before completing 40 full loops. 3x athletes will complete one short loop (1.2 miles) before completing 60 full loops. 4x athletes will complete one short loop (1.6 miles) before completing 80 full loops. 5x athletes will complete one short look (2.0 miles) before completing 100 full loops.

Road bikes must be in good working order. Remember to inspect your bikes before the race so you do not have any mechanical surprises on the bike course. You may use more than one bike during the race.​

You must wear an ANSI/Snell approved bike helmet during the bike course and have it buckled at all times when touching your bike. YOU MAY NOT DRAFT during this event. While on the bike segment, cyclists shall not work together to improve performance, efficiency, or position by teamwork or other joint conduct. All cyclists must assume and maintain a staggered riding position relative to the cyclists directly ahead. A variable time penalty shall be imposed for any violation of this. You may stop or walk your bike, but no time adjustments will be made.

We will have course signage out notifying motorists of the event. At the end of the day, cars are bigger than bikes so please stay alert and be aware of your surroundings.​

No headphones are allowed. While you may carry a phone, you cannot use it as a communication device

Run Course Details

5x: 130 loops / Triple: 78 loops / Double: 52 loops / 1.5x: 39 loops

The run segment takes place on asphalt road. The run course is a 1.00769 mile (1.621719 kilometer) loop course.

The paved run course is designed specifically to give your crew three easy points of access per loop to you to help with fueling when needed. The course stays inside the park and campground at all times. There are multiple bathroom opportunities along the course. The run course is somewhat exposed so be prepared for all weather conditions.You must use a flashlight/head light for the run section once it gets dark as well as a flashing red light on your back for greater visibility.

Crew is not allowed to be on course for support. All support must be done within the village. You may stop and rest at any time along the course, but the race clock is still in motion. Athletes may not receive any assistance in the form of transportation. You may not have your support crew pace you during the run. You may, on your last run lap, invite your friends and family to run with you.

Ready to test your limits?

Whether you’re chasing your first ultra or your next finish line, Mammoth Endurance is here to carry you through.

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