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Triathlons in UK in September 2026
Find triathlons in UK in September 2026 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.
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- Sun 20 Sep 2026
- £30-£97
Windsor, Buckinghamshire, UK
Eton Dorney Triathlon & Swims
The Olympic venue, Eton Dorney, offers pan-flat, traffic-free roads and a beautiful clear lake for all levels of triathletes and swimmers to enjoy in an exclusive setting.
- Families
- Recycling
- Newcomers
- Dogs allowed at venue
- Event village
- Urban
- Park
- Rural
- Free venue entry
- Age 15 & over
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Lake swim 4
- Sun 20 Sep 2026
- £53-£115
Saint Neots, Cambridgeshire, UK
ATW St Neots Triathlon | Race 3
Stunning riverside venue! Swim in the beautiful River Ouse, cycle through scenic villages and run around Riverside Park in a triathlon or aquabike event of your choice.
- Newcomers
- Event village
- Park
- Sustainability policy
- Age 15 & over
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Standard aquabike
- Sprint aquabike