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A great and tough event in the triathlon calendar, set in the historic grounds of Howard 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 23rd Jul 2021 in accordance with the COVID-19 safety measures. Learn more

How to enter the Castle Howard Triathlon

  1. The Gauntlet

    Triathlon: Swim 1.9km, Bike 90km, Run 21km
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  2. Olympic Distance

    Triathlon: Swim 1.5km, Bike 45km, Run 10km
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  3. Sprint Plus Distance

    Triathlon: Swim 0.8km, Bike 46km, Run 8km
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  4. Super Sprint Distance

    Triathlon: Swim 0.4km, Bike 23km, Run 4km
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  5. Tri Starter

    Triathlon: Swim 0.2km, Bike 13km, Run 2km
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  6. Sprint Distance

    Triathlon: Swim 0.75km, Bike 23km, Run 5km
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  7. Duathlon Sprint

    Duathlon: Run 5km, Bike 20km, Run 2.5km
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  8. Aquabike Sprint

    Aquabike: Swim 0.75km, Bike 20km
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  9. Aquathlon Sprint

    Aquathlon: Swim 0.75km, Run 5km
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  10. Junior Triathlon (11-12 years old)

    Triathlon: Swim 0.3km, Bike 4km, Run 1.6km
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  11. Junior Triathlon (9-10 years old)

    Triathlon: Swim 0.2km, Bike 4km, Run 1.3km
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  12. Junior Triathlon (13-14 years old)

    Triathlon: Swim 0.4km, Bike 6km, Run 2.4km
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  13. Junior Triathlon (15-16 years old)

    Triathlon: Swim 0.5km, Bike 8km, Run 2.4km
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Castle Howard Triathlon routes

A swim of the Great Lake in view of Castle Howard itself sets up the grandest race of the Series. 

A short run up the North Lawn, pitches competitors out onto the hilly cycle which circumnavigates the 10,000 acre Howard estate, passing through the equally stunning Hovingham Estate, before touring most of the remainder of the Howardian Hills.

Probably the best of the Gauntlet cycle routes, this is one for the two wheel kings.  A circuit awaits on the run taking in all the key landmarks and monuments including the Castle South Lake and Lawn, The Atlas Fountain, the Temple of the Four Winds and the Mausoleum. 

Not for the feint hearted this is a true test of grit in an absolutely magnificent setting.

Event Details

What’s Included
  • Official race photography
  • Finisher's medal
  • Prizes for winners
  • Live music and entertainment
  • Fully marked and signed route
Raceday Logistics

Start times will be available closer to the event date.

The start timings for various Sprint events took place in previous years between 07:30 and 14:30. The Starter Tri, Children and Swim only events started between 15:00 and 17:00. If needs be, a similar format will be followed.

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.
Kit List
Bikes are available to hire with British Bike Hire at

Kit List
  • Transition box/bag
  • Wetsuit
  • Goggles
  • Towel
  • Cycling shoes & socks (If wearing)
  • Tri suit or shorts and t-shirt
  • Bike and helmet
  • Trainers (some routes require trail shoes)
  • Nutrition
  • Water Bottle
  • Race Belt
Junior Equipment
  • Wetsuit (all Castle Triathlon Series events are in open lakes so temperatures can get pretty cold)
  • Swimming goggles
  • Swim hat (all competitors get a free hat on the day of the events)
  • Bike (mountain bikes are ideal)
  • Helmet
  • Trainers
  • Elastic or lock laces – to tie up your trainers quickly
  • Tri-suit or shorts and t-shirt are fine

There is a fee for spectators at this event. Spectators will pay a nominal fee for car parking on the estate and entry in to the grounds: adults – £5, children aged between 6 – 15 years old – £3 (40% adult discount, 50% child discount on normal castle grounds entrance costs).

All competitors are free and children taking part in the 8-15yrs races can bring in 1 adult per competing child for free.

Frequently Asked Questions

Can I hire a bike rather than trek mine to the Castle Howard Triathlon?
Absolutely, if you hire a bike with British Bike Hire, the bike will be at the event site waiting for you. Visit for more information.
Is it an open water swim at the Castle Howard Triathlon?
Yes, the swim will take part in the lake.
When will I be sent my start time for the Castle Howard Triathlon?
Participants will be emailed their start time approximately 2 weeks ahead of the event.

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.



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Tickets £25–£165

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