The 2025 British Triathlon Championship schedule and age-group team qualifiers for the 2026 European and World Championships have been confirmed.
To be eligible to become a British champion, or qualify to represent the British age-group team, an athlete must be a home nations core or ultimate member.
Where a British Championship is being held, the home nation equivalent championship will be held at the same event. All British Triathlon core and ultimate members are eligible to become British Champion in their age group.
During the 2025 season there are 26 events that have received either World Championship or European Championship qualifier status.
The British Championship season kicks off on March 23, 2025 at the TriWorks East Fortune Duathlon with the first ever British Sprint Distance Duathlon Championships in Scotland. Sticking with run, bike, run, a week later the British Standard Distance Duathlon Championships takes place at Oulton Park alongside the British Para Duathlon Championships on March 30, 2025.
Burghley Multisport Weekend then hosts a British Championships double header with both the inaugural British Standard Distance Aquabike Championship and the British Standard Distance Triathlon Championships taking place on May 10-11, 2025. It’s then time to get a team together and head to the British Mixed Team Relay Championship on May 17, 2025 at Box End Triathlon and Mixed Relay.
The season moves into June with the British Sprint Distance Triathlon Championships on June 8, 2025, at Blenheim Palace. A week later the distance increases with the Lakesman playing host to the British Middle Distance Triathlon Championships.
The British Paratriathlon Championships take centre stage on July 12, 2025, at Arctic One Tri and Para-Tri Festival before the 2025 Championship season ends on August 17, 2025, as Porthcawl Aquathlon, Wales hosts the British Sprint Distance Aquathlon Championships.
English and Welsh Championship events are outlined below. Scottish Championship dates are yet to be announced.
Standard Distance Aquabike Qualifiers
| Deva Triathlon | 1 June | World Qualifier |
| Artic One Tri and Para-Tri Festival | 12 July | World Qualifier |
| Blithfield Triathlon | 17 August | World Qualifier |
Sprint Distance Triathlon Qualifiers
| Outlaw Triathlon | 17 May | European Qualifier |
| Dorney Lake Triathlon | 25 May | World Qualifier |
| Blenheim Palace Triathlon | 8 June | European Qualifier |
| Woodhorn Museum Festival of Sport | 12 July | World Qualifier |
| DB Max Sprint Triathlon | 27 July | European Qualifier |
| SWYD Sprint Triathlon | 7 September | World Qualifier |
Standard Distance Triathlon Qualifiers
| Southport Triathlon | 18 May | European Qualifier |
| Eastbourne Triathlon | 8 June | European Qualifier |
| Cardiff Triathlon | 22 June | World Qualifier |
| Fleet Feet Triathletes | 7 September | World Qualifier |
| Hever Castle Triathlon | 28 September | World Qualifier |
The third European Qualifier will be announced at a later date.
Sprint Distance Duathlon Qualifiers
| Castle Combe Sprint Duathlon | 16 March | World Qualifier |
| TriWorks East Fortune Duathlon | 23 March | European Qualifier |
| Active Training World Mallory Park Duathlon | 19 April | European Qualifier |
| Darley Moor May Sprint Duathlon | 25 May | World Qualifier |
| Upton Triathlon and Duathlon | 12 July | World Qualifier |
| Thruxton Mass Attack Duathlon | 5 October | European Qualifier |
Standard Distance Duathlon Qualifiers
| Oulton Park Duathlon | 30 March | European Qualifier |
| Northumberland Duathlon | 6 April | World Qualifier |
| Clumber Park Duathlon | 26 April | European Qualifier |
| The Slateman Triathlon and Duathlon | 8 June | European Qualifier |
| Belvoir Castle | 20 July | World Qualifier |
| Devon Duathlon | 2 November | World Qualifier |
