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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.

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
    Event passed
  2. The Gauntlet

    Triathlon: Swim 1.9km, Bike 90km, Run 21km
    Event passed
  3. Middle Distance Aquabike

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

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

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

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

    Run 13.1mi
    Event passed
  8. Marathon

    Run 26.2mi
    Event passed
  9. Middle Distance Duathlon

    Duathlon: Run 10.5km, Bike 45km, Run 4km
    Event passed
  10. Long Distance Duathlon

    Duathlon: Run 21.1km, Bike 90km, Run 10.5km
    Event passed
  11. Swim - 1.9km

    Swim 1.9km

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

Middle Distance Swim: 1.9K Swim

Long Distance Swim: 3.8K Swim

Swim Marathon: 10K Swim

Event Details

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


05:00 - Registration Opens

06:00 - The Bastion Start

06:15 - Swim Marathon Start

07:00 - The Gauntlet Start

08:00 - Middle Distance Aquabike, Long Distance Aquabike Start

09:15 - Middle/Long Distance Aquathlon, and Middle/Long Distance Swim Start

09:45 - Full Marathon, Long/Middle Distance Duathlon Start

10:00 - Half Marathon Start

Please make sure you arrive with plenty of time to get parked, registered and your transition set up. Information will be available two weeks before the event on what time transition must be cleared.


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.

The Festival of Endurance at Hever Castle weather forecast

Possible light rain in the morning.

Predicted highs
Predicted lows
Icon60% chance of rain
IconModerate breeze possible, up to 18mph

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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