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The Festival of Endurance at Hever Castle

Event details
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Hailed as the friendliest race on the triathlon calendar, and set in the historic grounds of Hever Castle, this event celebrates the athletic achievements of all racers. Come for the finisher's medal and the incredible atmosphere.
C-19 Plan
Castle Triathlon Series has confirmed that this event will be going ahead as planned on Friday 2nd Jul 2021 in accordance with the COVID-19 safety measures. Learn more

Review summary

1 Review
  • Course
  • Organisation
  • Atmosphere


Jim H
"A very well organised event, lovely course consisting of two laps. A mostly..."
See all reviews

How to enter the The Festival of Endurance at Hever Castle

  1. The Bastion

    Triathlon: Swim 3.8km, Bike 180.2km, Run 42.2km
    Book Now
  2. The Gauntlet

    Triathlon: Swim 1.9km, Bike 90km, Run 21km
    Book Now
  3. Middle Distance Aquabike

    Aquabike: Swim 1.9km, Bike 60km
    Book Now
  4. Long Distance Aquabike

    Aquabike: Swim 3.8km, Bike 120km
    Book Now
  5. Middle Distance Aquathlon

    Aquathlon: Swim 1.9km, Run 10km
    Book Now
  6. Long Distance Aquathlon

    Aquathlon: Swim 3.8km, Run 21km
    Book Now
  7. Half Marathon

    Run 13.1mi
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  8. Marathon

    Run 26.2mi
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  9. Middle Distance Duathlon

    Duathlon: Run 10.5km, Bike 45km, Run 4km
    Book Now
  10. Long Distance Duathlon

    Duathlon: Run 21.1km, Bike 90km, Run 10.5km
    Book Now
  11. 50 Mile Ultra

    Run 50mi
    Book Now
  12. 180k Sportive

    Bike 180km
    Book Now
  13. 90k Sportive

    Bike 90km
    Book Now
  14. Half Marathon

    Run 13.1mi
    Book Now
  15. Marathon

    Run 26.2mi
    Book Now
  16. Marathon Relay

    Run 26.2mi
    Book Now

The Festival of Endurance at Hever Castle routes

The historic grounds and former home to Anne Boleyn are home to an incredible celebration of athleticism. The Festival of Endurance truly has something for everyone whether they are a purist looking to perfect a long distance swim or would rather mix it up with an interdisciplinary triathlon.

A couple of highlights of this event include swimming in the Hever Castle Moat, and the stunning gardens of both Hever Castle and nearby Chiddingstone Castle. This race has been dubbed the friendliest triathlon on the racing calendar, and each year it continues to grow in popularity.


The Bastion: 3.8K Swim, 180K Bike, 42.2K Run

The Gauntlet: 1.9K Swim, 90K Bike, 21K Run

Middle Distance Aquabike: 1.9K Swim, 60K Bike

Long Distance Aquabike: 3.8K Swim, 120K Bike

Middle Distance Aquabike: 1.9K Swim, 10.5K Bike

Long Distance Aquathlon: 3.8K Swim, 21K Run

Half Marathon: 21.1K Run

Full Marathon: 42.2K Run

Middle Distance Duathlon: 10.5K Run, 45K Bike, 4K Run

Long Distance Duathlon: 21K Run, 90K Bike, 10.5K Run

Event Details

What’s Included
  • Race entry
  • Finisher's medal
  • Refreshments & snacks
  • Aid station
  • Clearly marked and marshalled course
Raceday Logistics

Please see the event website for more information.

The previous years start timings for the various Sprint events took place between 07:30 and 14:30. The Starter Tri, Children and Swim only events started between 15:00 and 17:00.

If Covid restrictions dictate, they shall follow a similar format at this Venue. If social distancing is not required, all adults events will take place in the morning and Children and Mixed Team Relay events after 14:00.

Entrants will be notified of their start time via email 2 weeks prior to the event. It is advised that entrants arrive at least 1 – 1.5 hours before their given wave time. Relays go off in the final wave of their distance.


Spectators are encouraged to come out to this spectacle of an event. The grounds of the castle are filled with food vendors and other entertainment so bring the whole family down and take in everything this awesome event has to offer.


This event has grown in popularity over the years and it is thanks to the incredible volunteers that help organise it.

If you are interested in helping out and being part of the team then find out more information at the following link:

Frequently Asked Questions

I have a British Triathlon license, do I have to pay full price for the Hever Castle Festival of Endurance?
You will need to bring your BTF License with you on race-day to avoid paying an additional £6.
Is the water quality at the Hever Festival of Endurance good?
Water quality reports are conducted by EU Water Bathing Directive and can be found on their website.
How cold will the water at Hever Festival of Endurance be?
Usually the water temperature fluctuates between 15 - 18 degrees, but it can change based on the current weather conditions.
I see there are many more races than I can purchase tickets for, why is this?
Let's Do This has an agreement with the event organiser only to offer certain events on our platform. If you would like to purchase any of the other races, you will need to go directly to the event organiser's website.

Meet the organiser

Are you the organizer? Claim this page

Formed in 2009, the Castle Triathlon Series has swiftly established itself as the UK’s largest triathlon series. From Lough Cutra to Chantilly and Castles Howard, Cholmondeley and Hever, we’re immensely proud of the iconic backdrops to each Castle Triathlon Series race and the friendly festival atmosphere produced at every event.



The Festival of Endurance at Hever Castle reviews

4 out of 5 stars

  • Course
  • Organisation
  • Atmosphere
  • Did the Half Marathon in 2019

    A very well organised event, lovely course consisting of two laps. A mostly trail run with a bit of road, very small stretches of the run where it’s too narrow to pass other runners, it wasn’t a problem though.
    Would highly recommend
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Tickets £30–£338

  • Official booking partner
  • Best price guarantee
  • Free injury protection

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