Eton Dorney Swim Long takes place on Sun, Sep 20, 2026 in Windsor, United Kingdom. The main route is 10 km.
- Date
- Sun, Sep 20, 2026
- Start
- Windsor 🇬🇧
- Distance
- 10 km
- Level
- Open to all
Held at the Olympic Dorney Lake venue in Windsor, the event features clear waters and offers multiple open-water swimming distances ranging from 2.5km to 10km.
Official event pageWhat this race demands
This 10 km open-water swim demands exceptional aerobic endurance and pacing discipline over an extended duration.
Aerobic endurance
Covering a 10 km distance requires sustained cardiovascular output and stamina to maintain forward propulsion over many hours.
Sighting and navigation
An open-water venue like Dorney Lake requires consistent sighting technique to swim efficiently in a straight line over the long course.
Given the extended duration of a 10 km swim, athletes should consume 60 to 90 grams of carbohydrates per hour through liquid nutrition or supported feed zones.
Your road to race day
Race day at Eton Dorney Swim Long is 4 weeks away. This is how a coach divides that time. The first phase starts now.
01Peak1 week · Aug 24, 2026 – Aug 30, 2026
The hardest weeks of the plan: race-specific intensity at nearly full training load, sharpening exactly what this race asks for.
02Taper2 weeks · Aug 31, 2026 – Sep 13, 2026
Volume drops while intensity stays: short, sharp efforts keep the legs awake as fatigue drains away.
03Race week1 week · Sep 14, 2026 – Sep 20, 2026
Openers, rest and logistics. The work is done; the job now is arriving fresh.
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