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Triathlons in South East in September 2026
Find triathlons in South East 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
- Sat 26 Sep 2026
- £58-£120
Windsor, Buckinghamshire, UK
Dorney Triathlon | September
Take on this multi-activity event as an individual or as a relay, and enjoy the opportunity to race around the unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
- Recycling
- Newcomers
- Event village
- Sustainability policy
- Public transport links
- Age 15 & over
- Super sprint triathlon
- Sprint triathlon
- Olympic triathlon
- Sprint aquabike
- Standard aquabike