Held at the impressive, special and statuesque venue. Belvoir Castle. An atmospheric, iconic gem.
14:00 - 30th August 2025
…As part of the Original Multisport Weekend in the East Midlands.
This weekend is causing a stir in the East Midlands with a fast growing reputation as THE event to attend on the calendar for 2025.
After the success of the LAST 3 YEARS we are pleased to announce the return of The Belvoir Castle Triathlon 2025 (as part of the Belvoir Castle Multisport Weekend).
The only change we will be making for 2025 is to add:
***CROSS TRIATHLON & CROSS DUATHLON***
The aim at endorphinsport events is to continue to make this event TRULY inclusive and there really is an option for EVERYONE! 🎉
Set on the stunning landscapes of the historic estate, providing the perfect backdrop for a memorable open water triathlon. We will be swimming in the estate's tranquil lake. The bike route is undulating through the best of the British countryside, finished by a picturesque run through the castle grounds.
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↠ Bespoke Designed Eco Medal (designed and manufactured in the UK)
↠ High Quality Super soft silicone event swim cap so you can use it again & again!
↠ Fully Marked Course
↠ Professional chip timing, online Results
↠ Gourmet quality food vendor & Barista coffee vendor
↠ Spectator Friendly course
↠ Toilets for Competitors/spectators
↠ Baby Changing and disabled toilets
(OPTIONAL purchase of high quality organic cotton or TriDri technical Belvoir Castle Triathlon tee at check out or from our website)
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These swim sessions allow you to swim in the lake you will be competing in, fully marshalled by our swim safety team and our head coach with be on hand in the kayak to give you any support and tips should you need it.
Dates to be confirmed. Please click on the button below to register your interest. As soon as the dates have been confirmed with the estate, we will send you a booking link to secure your place.
❗Limited to 30 Swimmers each session. We are limited to only 2 practice swim sessions at this venue so please book on early to avoid disappointment.
These sessions are open to all ages and abilities. (Children will be briefed before entering the lake and accompanied on the water by a BTF Level 2 Coach)
🎟️ EXCLUSIVE to Belvoir Castle Triathlon & Aquathlon Entrants ONLY
Location.
When.
SUNDAY 31AUGUST 2025
Saturday: (Optional for locals and campers)
Registration Opens: Saturday 3.30 - 5pm
Event Briefing at 5pm near Registration
Sunday/Event Day:
Registration Opens 5.00am
Transition Opens 5.15am
Middle Distance Start 6:15am
Olympic Distance 7:15am
Sprint Distance 8:15am
Super Sprint 9:15am
All Aquathlons start at 9.30am ensuring all run marshals are in position.
Please note: all timings are dependant on the number of entries. Final start times and Competitor Guide be sent out the weekend before the event.
Triathlon/Aquathlon/Aquabike Distances
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↠ TRIATHLON: Swim 2km/Bike 83km/Run 21km
↠ AQUABIKE: Swim 2km/Bike 83km
↠ AQUATHLON: 2km Swim/21km Run(Age as of 31st December )
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↠ TRIATHLON: 1500m Swim/40km Bike/10km Run
↠ AQUABIKE: 1500m Swim/40km Bike
↠ AQUATHLON: 1500m Swim/10km Run
(Age as 31st December )
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↠ TRIATHLON: 750m Swim/26km Bike/5km Run
↠ AQUABIKE: 750m Swim/26km Bike
↠ AQUATHLON: 750m Swim/5km Run
(Age as of 31st December)
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↠ TRIATHLON: 400m Swim/13km Bike/2.5km Run
↠ AQUABIKE: 400m Swim/13km Bike
↠ AQUATHLON: 400m Swim/2.5km Run
You must be 15 and over to compete in the individual Super Sprint Triathlon distance.
(Age as 31st December)
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↠ Family Team
↠ Club Team
↠ Corporate Team
Relays (2/3 people per team) for:
Middle Distance, Olympic, Sprint Distances listed above.
↠ Sprint Relay: Under 15’s can race completing the swim or run leg in a Team of 3.
↠ Swimmer minimum age is 11 years
↠ Cyclist 15 years
↠ Runner 13 years.
Age on 31st Dec
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Age as of 31st December
↠ For the Middle Distance Triathlon/Aquabike/Aquathlon - minimum age is 18 years on 31st
↠ Olympic Distance/Aquathlon/Aquabike - minimum age is 17 years on 31st December
↠ Sprint Triathlon/Aquathlon/Aquabike - minimum age is 15 years on 31st December
↠ Aquathlon - minimum age is 15 years on 31st December
↠ Super Sprint Triathlon - the minimum age is 15 years on 31st December
↠ Sprint Relay - Under 15’s can race completing the swim or run leg in a Team of 3.
Swimmer minimum age is 11 years, cyclist 15 years & runner 13 years. Age on 31st Dec
*Please note ALL under 16’s will need to complete a parental consent form BEFORE the event
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*Accurate start times will be communicated to registered participants closer to race day. You will receive your competitor Information 1 week prior to Race Day and your Start Times one week before directly from Endorphin Sport. Please check your junk inbox if you have not received this information or check on our website for this information - our website will always have the latest information. If in doubt ALWAYS email us directly at info@endorphinsport.com
IMPORTANT - As part of our T&C's No refund or transfer will be given if the timings of the day are changed and as a result you are no longer able to make your event. Timings will not change drastically from the schedule here.
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For 2023 you will be able to rack your bike during the Saturday registration period during 3-5pm OR you can rack your bike on the morning of your event.
Transition on the Event Day will open at 5:45am.
Within your Race Pack you will receive a Luggage Label please put this on your bag and drop off in the clearly marked area BAG DROP in Transition. This area is secure, participants only have access to this area however please note we do not accept any responsibility for loss, theft or breakages.
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↠ Please pick up your Race Packs from Registration before you enter the Transition area and rack your bike.
↠ Your Race pack will include race numbers, luggage/bike/helmet stickers and your swim cap specific for your distance.
↠ Timing Chips will be handed over at Registration.
↠ For those that are BTF members Please bring your membership card with you for reference.
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↠ Bike Feed & Drink stations will be available for those doing the Middle Distance at the 53km point
↠ Run Feed & Drink Stations will be available for all distances at the 3.3km point– top of the hill.
↠ Our Partner Fuelling Provider is OTE.
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↠ - Prizes 1st, 2nd and 3rd Overall Female & Male in each TRIATHLON event AND in each age category
↠ Prizes for 1st, 2nd and 3rd Overall Female & Male for Aquabike/Aquathlon Races.
- Relay Categories 1st in each - Family/Club/Corporate
(Age as 31 Dec 2023)
Open Water Lake Swim
The Lake Swim: The open water swim takes place in a calm lake at the foot of the Estate with sights up to the castle, the swim is a multi lap swim. The swim is also perfect for those new to open water triathlon as you're never too far away from the lakes edge or your supporters. All competitors will be placed in start wave groups which will be confirmed closer to the date of the event.
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1.9km Swim - Middle Distance
1.5km Swim - Olympic Distance
750m Swim - Sprint Distance
400m Swim - Super Sprint
↠ Start times are based on your estimated swim time starting with the slowest swim times.
↠ The swim will be in the estate’s lake.
↠ Laps of the lake will be confirmed nearer the time judging the water levels.
↠ Competitors need to be in the swim holding area 15 mins before your start time changed & ready to collect your timing chip.
↠ The swimmers around you will be of a similar standard and you will be in a wave of no more than 25 people.
↠ You will be told which direction to swim in, on entering the lake. On completion of your laps (tbc - depending on water levels), exit from the Ramp/Pontoon marked Swim Out.
↠ There will be no changing facilities. Follow the signs for the transition area (this is a 350m run on grass) and find you bike.
↠ The surface is grass and will be cleared and checked for sharp objects but if you want to wear shoes for this section then place your shoes around Swim Exit.
The Bike.
Bike: All distances (other than the Super Sprint) is a multi-lap course with a challenging undulating profile through the idyllic vale of Belvoir villages. There are one or two sharp and gradual inclines that prove a good test of mental, physical strength and determination but you will be well rewarded with a route of discovery through quaint villages and quiet country roads.
The Super Sprint bike leg is one undulating lap.
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↠ 83km Middle Distance
↠ 40km Olympic
↠ 26km Sprint
↠ 13km Super Sprint
The Run.
Run: Feel the history of the land and be surrounded by ancient trees adorning your run, finishing with a scenic multi-lap run on tarmac roads around the estate running up to the Castle itself and then onto your Finish with the Castle creating a momentous backdrop for your free Finishers Photo download.
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↠ 21km Middle Distance
↠ 10km Olympic
↠ 5km Sprint
↠ 2.5km Super Sprint
↠NO CUT OFF TIMES ↞
At Endorphin Sport Events, we do not impose cut off times as we understand the pressure it can put you under and we'd rather you enjoy the scenery and enjoy your event! This means you will receive an official time regardless.
↠ In addition, it is at our discretion as the event organiser to consider the safety of all entrants, if we feel you are continuing at the detriment to your health or safety we may call it a day on your behalf.
Make a weekend of it?
Idyllic Lake Side Camping - Why not spend the weekend with us? Your camping spot enjoys stunning views across the estate up to the grand Castle.
Please add the CAMPING at Checkout OR book separately from our website Store.
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↠ Lakeside Pitch overlooking the event lake, across to the Hall and Church and Event Hub/Transition.
↠Hot Showers will be provided (to campers only)
↠Toilets
↠ Water points
NB. Well behaved dogs welcome and to be kept on lead.
Want to join in for your first open water swim challenge or Triathlon but haven’t got a wetsuit?
We are pleased to annouce that we have partnered with Tri Wet Suit Hire offering a hassle free wet suit hiring process.
All you need to do is contact us on the button below to request your exclusive savings code*, enter your measurements on their website, select your hire period (4 weeks, 6 weeks, whole season) and Tri Wet Suit Hire send your wetsuit directly to your door! No deposit, wet suits for kids and adults of all sizes, and after your hire period you have the option to return or purchase the wetsuit. Easy!
*Only available to Endorphin Sports Entrants
Endorphin Sports is one of the leading sports event organisers in the East Midlands covering currently Nottingham and Leicestershire.
In alignment with our inclusive ethos, we organise sprint distance triathlons,olympic and middle distance triathlons, aquathlons, aquabikes, swim challanges and offer Beginners Workshops and Practice sessions to ensure that if you want to get involved, then we will make it as easy and encouraging as possible.