By using this website you agree to our cookie policy
Need training help? Get a free training plan

The Festival of Endurance at Hever Castle

Get race results and photos

This event has passed. Congratulations to all the participants. Get race results and photos.

We are pleased to announce that the Festival of Endurance will return on Sunday 7th July 2019.

Due to popular demand the Gauntlet half iron distance triathlon is returning with athletes racing alongside the full iron distance or Bastion competitors around much the same course. Whilst these two epic triathlons are taking place a further 4 sets of endurance challenge races are taking place including an Aquabike, an Aquathlon, Long Distance Running and Long Distance Swimming making this a true celebration of the art of going long. Please read on for more details.

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

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

    Other: Swim 3.8km, Bike 120km
    Event passed
  5. Middle Distance Aquathlon

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

    Other: Swim 3.8km, Run 21km
    Event passed
  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
  10. Long Distance Duathlon

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

    Swim 1.9km
    Event passed

Training Plans by Let's Do This - The Festival of Endurance at Hever Castle

Download your free training plan below. Simply select your race and we’ll send it straight to your inbox.

Opt in to receive training advice and race recommendation emails.

The Festival of Endurance at Hever Castle routes

The Bastion, the final stronghold of a medieval castle, features a 3.8km river and lake swim, a true toughie of a 180km bike course with 3,000m of climbing and a 42.2km run course that takes place largely off-road including running through the grounds of the beautiful Chiddingstone Castle. The event has generated rave reviews, helping grow this event into one of the truly iconic long-distance triathlons in the world.

Event Details


We are delighted to announce that The Bastion full iron-distance triathlon will be back, for the fifth time, on 8th July 2018.

Set within close proximity to London and triathlon’s heartland of the south-east, each leg of The Bastion has been carefully designed to offer the ultimate challenge for both newcomers to long-distance triathlon and experienced long-course hands.

The nurtured exclusive field continues to show loyalty and grit and we look forward to welcoming them back along with new competitors ready to take on the challenge.


The Festival of Endurance at Hever Castle weather forecast

Overcast throughout the day.

Predicted highs
Predicted lows
IconLight breeze possible, up to 6mph

Meet the organizer

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