2026 Virginia ANVIL Ultra Triathlon

October 8-10 | Spotsylvania, Virginia
Lake Anna State Park

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.

Two male triathletes in wetsuits and swim caps high-fiving in water with a red buoy in the background.
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Medical Form

Race Categories

  • Virginia ANVIL | October 8-10

    Single Anvil Triathlon
    2.4 mile open water swim, 112 mile bike, 26.2 mile run.
      - 17 hour finish time limit / $850

    1.5x Anvil Triathlon
    3.6 mile open water swim, 168 mile bike, 39.3 mile run.
      - 30 hour finish time limit / $1,200

    Double Anvil Triathlon
    4.8 mile open water swim, 224 mile bike, 52.4 mile run.
      - 36 hour finish time limit / $1,200

A green kayak resting on the shore of a lake with tall grass, a traffic cone, and a paddle, during sunset with clouds and the sun partially visible in the sky.
A person riding a bicycle on a road, wearing a helmet and purple shirt, with a blurred background indicating motion, possibly during sunset or sunrise.
A tent with the words 'LAW ENFORCEMENT' and 'US ARMED FORCES' printed on it, set up outdoors with bicycles and other gear nearby, and people attending an event.
People in water near a large inflatable buoy on a calm body of water, with a distant shoreline and hazy sky.
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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 in a red shirt and helmet riding a black road bike on a blurred outdoor path or road with trees in the background.
A person riding a bicycle on a paved path through a forest with tall trees and sunlight filtering through the leaves.
Man riding a red road bicycle on a paved path, wearing a white helmet, white long-sleeve shirt, black shorts, black shoes, and light blue socks, with trees in the background.
A person riding a black bicycle on a paved road, wearing a white helmet and sunglasses, with a water bottle attached to the bike frame, and using a phone while riding. The background is blurred indicating motion.
Sharks swimming in foggy water with a person swimming nearby.
A person standing in water, wearing a wetsuit and adjusting their swim cap, with mist rising from the water during dawn or dusk.
A large river at sunset with a boat and several buoys on the water, trees along the shoreline, and a colorful sky.
A man and woman embrace and smile, holding an American flag together. The man is tall with a beard and long hair tied back, wearing a black hoodie. The woman is shorter, wearing a hat, gloves, and a red jacket. There is another person in the backgrou
Two male triathletes in wetsuits and swim caps, smiling and holding hands during a swimming race, with a large red buoy in the background.

Swim Course Details

Doubles: 12 loops / 1.5x: 9 loops / Singles: 6 loops / Half 3 loops

The swim takes place off the beach of Lake Anna State Park on Lake Anna, which is considered a shallow lake, with water depths no greater than 10 to 12 feet across the swim area of the lake. The normal water temp for this race has been an average of 65 to 70 degrees, so wetsuits are recommended.  

You will swim a 2112 foot/644-meter clockwise out and back pattern around a swim line (swim line length is 1056 feet/322 meters). Half athletes will complete 3 loops; Single athletes will complete 6 loops; Double athletes will complete 12 loops. You must wear the colored Mammoth swim cap provided to you during check-in. Timers will be sitting at a table on the shore timing your laps and will observe you with the colored swim cap you are wearing. At the main buoy/turn area, we will have two aid station floats where you can place your water bottles into the cup holes and food items beside them. This will allow you to get your own aid without your support crew having to wade 50 feet or so from shore.

A swimmer may use any swim stroke to propel themselves through the water and may tread water or float. You may not use any floatation device, flippers, or fins on the swim. The swim must be completed within 2 hours of race start for the Single and Half athletes (9:00 a.m.), 1.4x within 4 hours of race start (11:00am), and within 5 hours of race start for the Double athletes (12:00 p.m.).

You must stage your bike and bike gear at the swim area. Following completion of your swim you have the ability to shower and use a restroom for changing. You will get on your bike at the swim location and ride up to the village to get the total distance needed for your bike segment.

BIKE COURSE DETAILS

Doubles: 44 loops / 1.5x: 33 loops / Singles: 22 loops / Half: 11 loops

The bike segment takes place inside the park. As it gets dark, you will be required to use adequate lighting (white light) on the front of your bike and a red flashing light on the rear. The front white light should broadcast decently 10’ or more. We also highly suggest a headlamp attached to your helmet. Ensure you have sufficient batteries to last throughout the night. There is electricity available to charge spare batteries inside the race village.

The bike segment is a 5.0769 mile (8.169 kilometer) loop inside the park. You will start the bike demo the swim area.​

You’ll begin your bike down at the swim exit and ride your bike up to the race village location (red line on the diagram). At that point, you will begin your first loop on the bike course by heading out to the Park Loop Turnaround, riding back through the village to the Cabin Loop Turnaround and
final riding over the Finish Line (red line on diagram) at the race village location. This completes one loop of the course.

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.

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.

The bike loop is pretty much flat with two medium size hills plus a few other small rollers. The turnaround point is just before the campground. There is a decent size opening in the road giving you a little extra room to make that 180 degree turn and head back to the village. Please be careful making your turn around and be aware of vehicles that may be entering or exiting the campground. 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.

Single and half athletes must complete the bike segment within 13 hours of the race start (8:00 p.m. Friday), 1.5x athletes within 20 hours of race start (3:00am Saturday), Double athletes within 26 hours of race start (9:00 a.m. Saturday).

Run Course Details

Doubles: 52 loops / 1.5x: 39 loops / Singles: 26 loops / Half 13 loops

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

Half athletes will complete 13 loops, Single athletes will complete 26 loops, and Double athletes will complete 52 loops. 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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