ATW Box End Triathlon – Sunday 5th July 2026

Featuring the Inter Services Triathlon Championships

Get ready for one of the UK’s most exciting triathlon events of the year! The ATW Box End Triathlon returns on Sunday 5th July 2026, featuring Sprint, Standard and the brand-new Odyssey distance.

This year’s event is even more special as it will also host the Inter Services Triathlon Championships – giving everyday athletes a once-in-a-lifetime opportunity to line up alongside competitors from the Army, Royal Navy, Marines, RAF, Ambulance Service, Fire Service, Police and Prison Service.

While the Inter Services Championships are an exciting part of this year’s event, the race is open to absolutely everyone – from first-time triathletes to experienced competitors. Whether you’re chasing a personal best or just looking to enjoy the day, you’ll find the Box End Triathlon welcoming, supportive, and unforgettable.

Why Box End?

Box End Lake is renowned for its pristine water quality and stunning on-site run routes, creating the perfect backdrop for an incredible day of racing. With great spectator viewing, friendly marshals, and an amazing atmosphere, you’ll feel supported from start to finish.

Event Options

• Sprint Distance – A great choice for beginners or those chasing speed.

• Standard Distance – A true test of endurance over the classic Olympic distance.

• Odyssey Half Distance – The exciting new challenge for 2026, designed for athletes seeking something epic.

All event will start from 7AM. We will let you know your allocated start time in the final event information. This will be emailed to you approx. ten days before the event.

Plus:

• Aquabike (Swim + Bike only)

• Relay Team Options (2–3 participants)

Event Highlights

Inclusive & Open to All – No matter your ability, experience, or background, you’re welcome here.

Non-Draft Legal Race – Fair competition for every athlete.

Multi-Lap Courses – Fantastic atmosphere with plenty of spectator support.

Camping Available – Stay the weekend at Box End Park (book via info@boxendpark.com).

Inclusive Categories – Transgender athletes are warmly welcomed. From January 2023: Female category (assigned female at birth) & Open category (all other athletes).

Timings & Cutoffs

There are no cutoffs for Sprint and Standard distances as they run alongside the longer Odyssey race. To give you an idea:

Sprint – winner ~1hr15 | last finisher ~3hrs

Standard – winner ~2hr20 | last finisher ~4hr45

Why Enter?

✅ Stunning clear waters
✅ Beautiful scenic course
✅ Well-marked routes
✅ Supportive marshals
✅ Free event photos
✅ Custom-designed medal
✅ Finish line snacks & goodies

✅Positive Participant Reviews on Racecheck (Read reviews)

Want to hire a wetsuit for the season? We are proud to offer Zone3 wetsuits. Find out more  HERE

Want to hire a wetsuit for a day, weekend or month? Find out more  HERE

The ATW Box End Triathlon 2026 is set to be a truly memorable event – a unique chance to test yourself, soak up the atmosphere, and be part of something extraordinary.

Charity - Join us in making every stride count by raising money for our partner charity, Alzheimers Research UK - your run will not only challenge your limits but also change lives, one step at a time, for a cure. Opportunities to donate and fundraise will appear at checkout.

ATW Transfer & Refund Policy

At ATW, we understand that sometimes plans change. While we do not offer refunds or transfers to another person, we provide a hassle-free event transfer option for those unable to attend their booked event. If you are unable to participate in your scheduled event for any reason—including injury, illness, pregnancy, bereavement, or other unforeseen circumstances—you can transfer your entry to any future ATW event. There is no proof required, we trust you!
Even better news, transfers can be made all the way up to 48 hours before your original event date.

Event Organiser

ATW was established in 2011 by James Shipley. We have now become a national events company in the UK, specialising in Running, Triathlon, Duathlon, Aquathon, Cycling, Swimming and all permutation of swim-bike run events. With over 40,000 entries a year ATW has become a firm favourite amongst people who are determined to Dream, Believe and Achieve.