UK Triathlon Race Calendar 2026: Key Spring and Summer Events

The UK triathlon season is almost here. With over 500 events across the country in 2026, there has never been a better time to plan your race season. Whether you are targeting your first sprint triathlon or chasing a PB at a 70.3, this guide to the key UK triathlon dates will help you build your calendar.

Season Opener: March 2026

The UK season kicks off on 29 March 2026 with the Triathlon England Championships at Oulton Park, Cheshire. This sprint-distance event is a key early-season race for competitive age-group athletes and a great way to benchmark your fitness after a winter of training.

• 8 March: London Sprint Triathlon (pool-based, good for beginners)
• 8 March: St Andrews Spring Triathlon, Scotland (sprint, beginner-friendly)
• 29 March: Triathlon England Championships, Oulton Park (sprint)

April 2026

• 5 April: Torbay Triathlon Spring, South West (all abilities, 8 years+)
• 19 April: Stratford-upon-Avon Triathlon (sprint and standard)

May 2026

• 3 May: XTERRA Weston Park (cross/off-road triathlon)
• 10 May: Burghley Multisport Weekend (duathlon and standard distance)
• 31 May: Northumberland Festival of Sport Triathlon (standard distance)

June 2026: IRONMAN 70.3 Bolton

7 June 2026 sees the UK middle-distance highlight of the early summer — IRONMAN 70.3 Bolton. The swim takes place in the sheltered waters of Pennington Flash Nature Reserve, followed by a hilly bike leg through Greater Manchester and an exciting run through Bolton town centre to the finish outside the iconic Town Hall. This is a challenging but rewarding race that tests all three disciplines.

July 2026

• July (TBC): Outlaw Nottingham — Long Distance Championship returns to Nottingham
• 25–26 July: WTCS London at ExCeL Centre — world-class elite triathlon returns to London for the first time since 2015

September 2026: IRONMAN 70.3 Weymouth

20 September 2026 — IRONMAN 70.3 Weymouth, one of the most scenic races in British triathlon. A swim in Weymouth Bay, a hilly Dorset bike leg, and a flat seafront run make this a first-timer favourite and a PB course for stronger cyclists.

Tips for Planning Your UK Triathlon Season

• Start with a sprint or pool-based event in spring to build race experience
• Allow 12–16 weeks of structured training before your target race
• Register early — popular events sell out fast (Challenge Roth 2026 sold out in 30 seconds)
• Consider a B-race in April or May to sharpen your race skills before your main event
• Check British Triathlon’s event finder for the full 500+ event calendar

Whether you are aiming for your first sprint finish or a 70.3 PB, 2026 is a fantastic year to race triathlon in the UK. Start building your plan now.