ATW Stewartby Lake Triathlon & Aquabike

Join the largest multisports organiser in the UK, ATW, for the Box End Triathlon, featuring three race distances at the stunning Box End Lake:

- Sprint: 750m swim, 26km bike, 5km run
- Standard: 1500m swim, 40km bike, 10km run
- Centurion: 2250m swim, 80km bike, 20km run ENTER HERE

Box End Lake offers pristine water quality and a scenic on-site run route, making it the perfect venue for this event.

Event Highlights:

- Open to All Abilities: Whether you're a seasoned athlete or a beginner, everyone is welcome.
- Centurion Distance: Ideal for those training for a 70.3 (Half Ironman), this 100k distance race mirrors the PTO T100 series.
- Aquabike and Relay Options: Prefer just swimming and biking? Choose the Aquabike. Want to compete as a team? Opt for the relay with 2-3 participants.

Additional Information:

- Non-Draft Legal Race: Ensures a fair competition for all.
- Multi-lap course: Great opportunites for spectators to cheer you on.
- Camping Available: Make a weekend of it at Box End Park. Email [email protected] for more information and to book your camping tickets.
- Inclusivity: Transgender athletes are warmly welcomed. Starting January 1, 2023, there will be a Female category (for athletes assigned female at birth) and an Open category (for all other athletes).
- How long will it take? There are no applicable cutoffs for the Sprint and Standard as they take place alongside a 100k race that will take much longer.
- You can expect to take:
- Sprint - winner in 1hr15, last place 3hrs
- Standard - winner in 2hr20, last place 4hrs45

Why Enter? 

- Stunning Clear Waters
- Beautiful Scenery
- Well-Marked Course
- 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

Sign up now for an unforgettable triathlon experience!

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.

 

ATW Community

At ATW we think of our participants as a community and we love to hear about the community's dreams and achievments.

If you'd like to share those dreams and achievements you can do so on any of our social media platforms. Equally if you'd like any advice about your upcoming event you will almost certainly find someone who can provide some guidance.

Links to all our social media platforms are at the bottom of the page, including to our ATW Chat Facebook group, which might be the most interactive platform if asking for help.

 

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.