Middle distance aquabikes in the UK
A middle distance aquabike is basically a Half Ironman without the half marathon at the end so generally involve a 1.2-mile swim (1.9km) and a 56-mile bike ride (90km). It's a real feat of endurance but do-able if you are willing to put in the training time. Select your location for middle distance aquabikes in your area or scroll down to see events coming up.
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Middle distance aquabikes in 2025/2026
Featured events are listed below - select a month/region or the map view to see all events.

- Sun 21 Sep
- £140
Big East Middle Distance Aquabike
The Big East and Maldon Aquabike is brought to you by the largest triathlon organiser in the UK! A great experience featuring a tidal river swim.
- 1500 m river swimming
- 86 km road cycling + 1112 ft ascent

- Sun 24 May 2026
- £95
ATW Box End Centurion Aquabikus
Challenge yourself to tackle the Centurion this year, a distance made popular by the PTO race series. Ideal if you're taking a step up from Standard Aquabike or do not want the running stage.
- 2250 m lake swimming
- 81 km road cycling + 1674 ft ascent

- Sun 7 Jun 2026
- £135
ATW Grafman Middle Distance Aquabike
A fantastic aquabike event set at the superb Grafham Water venue for multi-sports athletes not wanting to run. Well-organised over a scenic course and a superb medal awaiting at the finish line.
- 1900 m lake swimming
- 91 km road cycling

- Sat 8 Aug 2026
- £110
ATW Odyssey Half Distance Aquabike
Complete your own Odyssey on a journey of self-discovery in the Cambridgeshire countryside comprising a swim in the meandering River Ouse followed by a cycle around scenic countryside.
- 1900 m river swimming
- 90 km road cycling + 1686 ft ascent
- Sun 21 Sep
- £80
The One on the River | Henley | Middle Distance Aquabike
Taking place across the scenic Thames Valley area with routes going through Culden Faw Estate. Swim the river and cycle the hilly open roads, enjoying great views.
- 1900 m river swimming
- 78.5 km road cycling
Middle distance aquabike events near you
Select your location for middle distance aquabikes in your area.