Belvoir Castle Triathlon and Multisport Festival
Sat 19 - Sun 20 Jul 2025 Grantham, Leicestershire, UK

Belvoir Castle Triathlon and Multisport Festival

A jewel in the castle crown! Get active in the beautiful grounds and surrounding area of stunning Leicestershire in the discipline of your choice! Celebrate in the festival village afterwards.

23 races

  • Sat 19 Jul
  • #1 of 23
Belvoir Castle, Grantham

Triathlon 9-10 years

00:00

Age 9-10

£35-£60

  • Sat 19 Jul
  • #2 of 23
Belvoir Castle, Grantham

Triathlon 11-12 years

00:00

Age 11-12

£40-£60

  • Sun 20 Jul
  • #3 of 23
Belvoir Castle, Grantham

Triathlon 13-14 years

00:00

Age 13-14

£45-£60

  • Sun 20 Jul
  • #4 of 23
Belvoir Castle, Grantham

Triathlon 15-16 years

00:00

Age 15-16

£50-£60

  • Sat 19 Jul
  • #5 of 23
Belvoir Castle, Grantham

Triathlon Super Sprint

00:00

Age 15 & over

£95-£145

  • Sat 19 Jul
  • #6 of 23
Belvoir Castle, Grantham

Triathlon Sprint

00:00

Age 15 & over

£100-£150

  • Sat 19 Jul
  • #7 of 23
Belvoir Castle, Grantham

Triathlon Sprint Plus

00:00

Age 17 & over

£115-£155

  • Sun 20 Jul
  • #8 of 23
Belvoir Castle, Grantham

Triathlon Olympic

00:00

Age 17 & over

£125-£165

  • Sun 20 Jul
  • #9 of 23
Belvoir Castle, Grantham

Triathlon Gauntlet

00:00

Age 18 & over

£245-£295

  • Sat 19 Jul
  • #10 of 23
Belvoir Castle, Grantham

Duathlon Sprint

00:00

Age 15 & over

£75

  • Sun 20 Jul
  • #11 of 23
Belvoir Castle, Grantham

Duathlon Standard

00:00

Age 17 & over

£80

  • Sun 20 Jul
  • #12 of 23
Belvoir Castle, Grantham

Duathlon Middle

00:00

Age 18 & over

£90

  • Sat 19 Jul
  • #13 of 23
Belvoir Castle, Grantham

Aquabike Sprint

00:00

Age 15 & over

£65

  • Sun 20 Jul
  • #14 of 23
Belvoir Castle, Grantham

Aquabike Standard

00:00

Age 17 & over

£70

  • Sat 19 Jul
  • #15 of 23
Belvoir Castle, Grantham

Aquathlon Sprint

00:00

Age 15 & over

£50

  • Sun 20 Jul
  • #16 of 23
Belvoir Castle, Grantham

Aquathlon Standard

00:00

Age 17 & over

£65

  • Sat 19 Jul
  • #17 of 23
Belvoir Castle, Grantham

Swim 1 Mile

00:00

Age 13 & over

£45

  • Sat 19 Jul
  • #18 of 23
Belvoir Castle, Grantham

Swim 2.5K

00:00

Age 16 & over

£55

  • Sat 19 Jul
  • #19 of 23
Belvoir Castle, Grantham

Swim 5K

00:00

Age 18 & over

£65

  • Sun 20 Jul
  • #20 of 23
Belvoir Castle, Grantham

Run 10K

00:00

Age 15 & over

£35

  • Sun 20 Jul
  • #21 of 23
Belvoir Castle, Grantham

Run Half Marathon

00:00

Age 17 & over

£45

  • Sun 20 Jul
  • #22 of 23
Belvoir Castle, Grantham

Run Marathon

00:00

Age 18 & over

£65

  • Sat 19 Jul
  • #23 of 23
Belvoir Castle, Grantham

Triathlon Starter

00:00

Age 15 & over

£80-£120

Event overview

Join in at the Belvoir Castle Multisport Event weekend to race through the beautiful grounds and surrounding area of stunning Leicestershire.

Pick your discipline - triathlon, duathlon, aquabike, aquathlon, swim and run - and choose a distance from starter to elite. Recruit your friends and celebrate completing your challenge in our festival village.

set within this remarkable estate and sets the scene for the perfect family-friendly weekend festival!

Like an illustration in a romantic fairy tale, crowning the top of an isolated hill, the castle turrets and towers rise above the Vale of Belvoir.  Looking over the battlements from the North Terrace, you can see for miles over the counties of Nottinghamshire, Leicestershire and Lincolnshire.  The name Belvoir – meaning β€˜beautiful view’ in French- is pronounced today as β€˜beaver’.

Fans of TV series, The Crown, will recognise several scenes filmed at Belvoir Castle. This Regency Castle was the perfect fit to recreate the Royals’ residence.

The Belvoir Castle Multisport event will feature some truly iconic courses amidst the 3,000 acres of naturally designed landscape, a large range of races for all ages and abilities.

Whether you’re 9 or 90 years old, a first-timer or an elite, you can pick from our triathlon, duathlon, aquabike, aquathlon, run and swim races.

Belvoir Castle has been awarded the Standard Distance Duathlon World Championship Qualifier for 2026

  • All fitness levels
  • Event village
  • Families
  • Newcomers
  • Spectators
  • Teams

Anyone of any gender, age or ability is welcome and safe to take part in a race. First-timers and old-timers, the next generation and the elites, clubs and corporates, schools and seniors are welcome. The more the merrier.

Clubs

Discounts and club event areas.

All sports clubs are welcome to take part in the events and group discounts are available, tailored waves for club championships, trading places scheme, as well as allocating you a place to pitch gazebos for a meeting spot in the event village.

Corporates

Creating healthy teams.

There are opportunities for companies to experience the events together – a great way to build team morale and friendly competition. This can include group booking discounts, pre- and post-race refreshment from your own hospitality marquee, your own company wave, custom kit and more.

Accessible racing

Racing for all.

This event has an ethos of accessibility and inclusivity and wants to be able to offer a race for everyone. Many inspirational paratriathletes have taken part in one of the Castle Triathlon Series races over the years including Paralympian Matthew Emmerson, the Band of Brothers and Band of Sisters – injured and wounded service men and women.

First timers

Compete or complete.

There are starter distances across all disciplines and a very supportive community of athletes and marshals to help you feel confident and comfortable completing your first race.

Juniors

The next generation.

From jumping in a lake, cycling through the woods to running around a castle, there are unforgettable, accessible races for 9–16 year olds at amazing locations.

Elites

Races for champions.

Rising stars and athletes have raced in the Castle Race Series from the very beginning. Many of these triathlon events host qualifying and national championships races in partnership with the BTF, TI and FF Tri, and the obstacle race is now a OCR World Championship Qualifier.

Female focussed

Closing the gap.

Over the last few years female participation has been increased to 38% by adding a greater variety of distances, female-only waves, launching the virtual series and making strategic partnerships.

Armed Forces

Race savings.

Discounts are offered on races to those who are serving or have served in the armed forces.

Bike hire

Choose between a road, hybrid or carbon road bike. If you don't have a bike or prefer not to have the hassle of transporting yours, bike hire in the perfect option.

Photography

Photographers are on-site to capture you in action!

Medals and prizes

Podium presentations take place for all races. All participants receive a medal which can be personalised with your name and finish time.

Training advice

Tri Training Harder help athletes prepare for this event through different coaching packages which include race specific training plans, pre-event training sessions and a virtual training club.

Merchandise

Race kit: Train for your race in Castle Race Series Kit and purchase a finisher t-shirt to make sure everyone knows you've conquered the castle!

Wetsuit hire

10% discount code: TriWetsuitHire are the quick, easy and affordable solution to making sure you have a high performance technical wetsuit for your race.

Buy wetsuits

15% discount with Yonda.

Spectators

A fantastic day out! Supporters are welcome to come along, explore the stunning castle grounds, cheer athletes on from numerous up close viewing spots, enjoy the event village entertainment and soak up the festival atmosphere.

  • Rural

Event HQ

Belvoir Castle
Grantham
Leicestershire
NG32 1PE
UK

Camping

From Β£30 per pitch.

There is a family campsite for tents and caravans in the gorgeous castle grounds with pitches starting at Β£30.

This event appreciates that the health of the planet is a huge challenge and has made commitments to tackle these challenges which they will continually measure, evolve and improve.

These environmental commitments include:

  • Reducing material use - prioritising using less
  • Reusing - finding better alternatives
  • Recycling - wherever possible
  • Being a responsible buyer - sourcing sustainably with an ethical framework in place

Great day out! As usual, another great event by Castle Race Series. excellent organisation, good friendly feel to it and nice event village atmosphere. a proper trail run! Andy S

A really great event, well planned and a supportive atmosphere for a first-time triathlete. I was taken aback by the distance between the swim and transition zone- it seems like a 600m uphill run was a bit mean! But apart from that, great course and lovely venue! Molly W

The most friendly, upbeat and helpful Marshalls and staff. Such a well-organised event. Look forward to racing more in the Castle Series. Mark S

Loved this event, definitely consider again for next year. Parking close to the village, later start times, great surroundings. Lake was good for swim, long run over hard ground to T1. Lovely fast bike course with one small hill. Hilly run in the castle grounds. Finish zone well stocked with water, coke, fruit and jellies. Cold water towels and sun beds! Lovely medal too!! Marc J

Really enjoyed the sprint and will definitely do it again. The venue, setting and routes were all really lovely (and thanks for ordering some great weather helped too!) Courses were good - just the right amount of challenging bits for me, and well signed/marshalled. All staff were very friendly and helpful, a great atmosphere all round! Rachel H

Superbly organised event from start to end. Tough tracks. Other than the public roads for the bike and the many buoy turns for the swim, this was a perfect setup. Well done and thank you. I gladly come back! Conrad M

First ever Half iron, I loved it! It was a challenge, but a great event! Beautiful day and grounds. One thing i will say is more water stations on the run! It was a really hot one today. Liam G

Having done all of the Castle series tris, this is definitely one of my favourites - loved the cycle (and I am not a keen cyclist!) and the lovely run route. Kathryn B

On the whole, a really nice event and one I’d do again. Well-marked course, a bit different with the trail run and great volunteers. The castle and surroundings a spectacular too. Victor H

I really liked the location and thought access to and from the site was easy. The lake was small and the course a little cramped. This wasn’t aided by the shallow water and weeds that were kicked up. The bike and run course were of decent quality and easy enough to follow whilst providing some challenging terrain. I would do this again and accept the compromises of the lake. Joe W

Reviews thanks to RaceCheck

Races at event

  • Sat 19 Jul
  • #1 of 23
Belvoir Castle, Grantham

Triathlon 9-10 years

00:00

Age 9-10

£35-£60

  • Sat 19 Jul
  • #2 of 23
Belvoir Castle, Grantham

Triathlon 11-12 years

00:00

Age 11-12

£40-£60

  • Sun 20 Jul
  • #3 of 23
Belvoir Castle, Grantham

Triathlon 13-14 years

00:00

Age 13-14

£45-£60

  • Sun 20 Jul
  • #4 of 23
Belvoir Castle, Grantham

Triathlon 15-16 years

00:00

Age 15-16

£50-£60

  • Sat 19 Jul
  • #5 of 23
Belvoir Castle, Grantham

Triathlon Super Sprint

00:00

Age 15 & over

£95-£145

  • Sat 19 Jul
  • #6 of 23
Belvoir Castle, Grantham

Triathlon Sprint

00:00

Age 15 & over

£100-£150

  • Sat 19 Jul
  • #7 of 23
Belvoir Castle, Grantham

Triathlon Sprint Plus

00:00

Age 17 & over

£115-£155

  • Sun 20 Jul
  • #8 of 23
Belvoir Castle, Grantham

Triathlon Olympic

00:00

Age 17 & over

£125-£165

  • Sun 20 Jul
  • #9 of 23
Belvoir Castle, Grantham

Triathlon Gauntlet

00:00

Age 18 & over

£245-£295

  • Sat 19 Jul
  • #10 of 23
Belvoir Castle, Grantham

Duathlon Sprint

00:00

Age 15 & over

£75

  • Sun 20 Jul
  • #11 of 23
Belvoir Castle, Grantham

Duathlon Standard

00:00

Age 17 & over

£80

  • Sun 20 Jul
  • #12 of 23
Belvoir Castle, Grantham

Duathlon Middle

00:00

Age 18 & over

£90

  • Sat 19 Jul
  • #13 of 23
Belvoir Castle, Grantham

Aquabike Sprint

00:00

Age 15 & over

£65

  • Sun 20 Jul
  • #14 of 23
Belvoir Castle, Grantham

Aquabike Standard

00:00

Age 17 & over

£70

  • Sat 19 Jul
  • #15 of 23
Belvoir Castle, Grantham

Aquathlon Sprint

00:00

Age 15 & over

£50

  • Sun 20 Jul
  • #16 of 23
Belvoir Castle, Grantham

Aquathlon Standard

00:00

Age 17 & over

£65

  • Sat 19 Jul
  • #17 of 23
Belvoir Castle, Grantham

Swim 1 Mile

00:00

Age 13 & over

£45

  • Sat 19 Jul
  • #18 of 23
Belvoir Castle, Grantham

Swim 2.5K

00:00

Age 16 & over

£55

  • Sat 19 Jul
  • #19 of 23
Belvoir Castle, Grantham

Swim 5K

00:00

Age 18 & over

£65

  • Sun 20 Jul
  • #20 of 23
Belvoir Castle, Grantham

Run 10K

00:00

Age 15 & over

£35

  • Sun 20 Jul
  • #21 of 23
Belvoir Castle, Grantham

Run Half Marathon

00:00

Age 17 & over

£45

  • Sun 20 Jul
  • #22 of 23
Belvoir Castle, Grantham

Run Marathon

00:00

Age 18 & over

£65

  • Sat 19 Jul
  • #23 of 23
Belvoir Castle, Grantham

Triathlon Starter

00:00

Age 15 & over

£80-£120