Three young male athletes standing on a winners' podium outside, holding medals and trophies, with a historic building in the background and a partly cloudy sky overhead.
Sunrise over a misty field with trees in the distance and a partially cloudy sky.
A group of runners participating in a race on a paved pathway surrounded by greenery and trees.
Wooden race medals with black and silver ribbons for the Staunton Harold Duathlon event, including categories for male and female, held on October 16, 2022.

As part of the Original Multisport Weekend in the East Midlands.

NEW FOR 2025, CROSS DUATHLON - (Trail Run/Mountain Bike/Trail Run) exploring secret estate grounds rarely seen by the Public! Views that will take you somewhere else! Sprint & Super Sprint distances - a truly inclusive event weekend!

↠ The Bike Course is now all off road, will be a undulating and challenging route through some of the estate’s private grounds promising spectacular views.

↠ The Trail Run weaves around the trails & (closed) roads of this atmospheric and serene estate.

Held at the impressive, special and statuesque venue. Belvoir Castle. An atmospheric, iconic gem.

Saturday 30th August 2025

15:00pm - Cross Duathlon Start

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EVENT GUIDE COMING SOON

Location.

Aerial view of a yellow and beige castle surrounded by lush green trees and open farmland under a partly cloudy sky.

Belvoir Castle

Grantham

Leicestershire

NG32 1PE

What3words:

https://w3w.co/clubbing.limit.wage

PLEASE NOTE: Times depend on number of entries, your final start time and Event Day Logistics will be finalised 2 weeks before the race.

As part of our T&C’s we do NOT issue refunds/transfers if you no longer can make the event due to a change in start times or delayed starts.

When.

Saturday 30th August 2025

Saturday:

Registration from 9.30am

Transition timings TBC

Start from 3pm

Please listen to the commentator - we will always aim to deliver the presentation as soon as everyone is across the line so we MAY BRING THE PRESENTATION FORWARD if we can. We will try to minimize waiting around time as much as possible so you can get on the Endorphin Sport Podium! 

Wooden medals for the Staunton Harold Duathlon, dated October 16, 2022, with black and white ribbons, awarded for different categories including sprint distance and overall placement for both males and females.
Group of people wearing yellow safety vests outdoors near a red brick building, some sitting and others standing, with a small dog in front.

  • ↠ Bespoke Designed Eco Medal (designed and manufactured in the UK)

    ↠ Gourmet quality food vendor and Barista coffee vendor

    ↠ Locally made after event replenishment!

    ↠ Fully Marked Course

    ↠ Professional chip timing, LIVE TRACKING and online Results

    ↠ Spectator Friendly course

    ↠ Toilets for Competitors

    ↠ Baby Changing and disabled toilets

Sunrise over a foggy countryside with rolling hills and scattered trees.
A mountain bike leans against a tree in a park with a dirt path, leafless trees, and distant park visitors in the background.

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XC Duathlon Race Information.

Two runners, a man and a woman, running in a race outdoors with a historic building behind them and a few spectators near a metal barricade.

  • XC Sprint Duathlon:

    ↠ 5km Trail Run/15km Mountain Bike/5km Trail Run

    COURSE DETAILS COMING SOON

  • XC Super Sprint Duathlon:

    ↠ 2.5km Trail Run/10km Mountain Bike/2.5km Trail Run

    COURSE DETAILS COMING SOON

  • ROUTES - COMING SOON

  • - Off Road trails are a mixture of hard pack, muddy, rocky, grass trails with a couple of up and downs to negotiate.

    - Hazards may include wet slippery surfaces including down-hills, grass, mud, snow/ice, twigs/branches from tree fall, loose stones and gullies formed by water erosion – all of which may be hidden under thick blanket of leaves.

  • Age as of 31st December 2025

    ↠ XC Sprint Duathlon: Entrants must be 17 years of age or older to participate.

    ↠ XC Super Sprint Duathlon: Entrants must be 15 years of age or older to participate.

  • 15:00 after the X Triathlon

  • ↠ Prizes 1st, 2nd and 3rd Overall Female & Male in each event

  • ↠ Please pick up your Race Packs from Registration before you enter the Transition area and rack your bike.

    Registration From : 1.30pm

    ↠ Your Race pack will include race numbers, luggage/bike/helmet stickers. Timing Chips will be handed over at Registration also.

    ↠ For those that are BTF members Please bring your membership with you for reference

  • ↠ All of the events are off-road so you will need grippy running shoes (ideally trail shoes)…..

    ↠ THE COURSE IS IDEAL FOR Mountain Bikes for the suspension and comfort. If you are used to riding a cyclocross bike on this terrain and wish to compete on this, that is your choice. However , cyclo cross bikes will be listed in the results as a separate category - cyclo cross bike (Power assisted and hybrid cycles are not permitted)

    ↠ As for what you wear, it’s up to you – just needs to be something that you can comfortably run and ride in

    IMPORTANT! We’d really like you to stick around for presentation - we do not sent Trophies out post event.

  • ↠ EVENT DAY: 7.30 - 8am - Transition Opens

    ↠ Please rack your bike on the morning of your event.

    ↠ 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.

Male athlete in a triathlon race, wearing a black and white Zoot racing suit, bib number 58, with red sunglasses, smiling and waving. He is near a barrier with the Endorphin Sport logo, and a man clapping behind him, with trees and a grassy area in the background.
A man kneeling on grass with two young girls, one in pink and the other in gray, wearing a Minnie Mouse shirt, after completing a race. They are surrounded by spectators and race barriers in a park.
A woman in athletic wear holding a young girl at a race event, walking along a grassy path bordered by barriers with 'Endorphin Sport' logos. The woman is smiling, wearing a green long-sleeve shirt and black leggings, with trees and a few people in the background on a clear day.
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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.