Olympic triathlons (standard distance) in South East in September 2025
Find olympic triathlons (standard distance) near me in South East in September 2025 - filter by date or location, display on a map or use the advanced search to find your perfect race.
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Select an event for photos, video, route, location, reviews, entry fees and how to enter.

- Sun 21 Sep
- £82-£97
- Sun 21 Sep
- £82-£97
Eton Dorney Standard Triathlon
The Olympic venue, Eton Dorney, offers pan-flat, traffic-free roads and a beautiful clear lake for Standard-distance triathletes to enjoy in an exclusive setting.
- Chip timing
- Enter online
- Flat
- Traffic free
- Age 17 & over
- 1.5 km lake swimming
- 40 km road cycling
- 10 km trail running

- Sat 27 Sep
- £99-£120
- Sat 27 Sep
- £99-£120
Dorney Triathlon | September | Standard
Take on a multi-activity or distance event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
- Chip timing
- Enter online
- Flat
- PB
- Age 17 & over
- 1500 m lake swimming
- 40 km road cycling
- 10 km road running

- Sun 28 Sep
- £125-£165
- Sun 28 Sep
- £125-£165
Hever Castle | Olympic Triathlon
Great Britain Age Group 2026 Team Qualifier. Get active in the award-winning grounds and surrounding Kent countryside in an Olympic Triathlon in an event for all ability levels then celebrate after!
- Chip timing
- Enter online
- Age 17 & over
- 1.5 km lake swimming
- 40 km road cycling
- 10 km road running
- Sun 7 Sep
The 1066 Triathlon | Standard Triathlon
- 1500 m sea swimming
- 40 km road cycling + 955 ft ascent
- 10 km road running
- Sun 21 Sep
The One on the River | Henley | Standard Triathlon
- 1500 m river swimming
- 54 km road cycling
- 10 km trail running