The Course

Course Summary

The course consists of 4 ” horse shoe shaped”, traffic free laps, on the tarmac roads that surround the lake.

The course has an international certificate of accuracy, and was measured by no less than former London Marathon winner Hugh Jones. This means times ran on this course are valid for “Good for Age” and international marathon qualifications.

The flat course is ideal for a chip timed personal best over the Marathon distance with 63% of runners surveyed in 2020 achieving a PB on this course.

Quick Event Info

Dorney Marathon


Dorney Lake, Eton College Rowing Centre, off Court Lane, Dorney, Windsor, Berkshire, SL4 6FJ

Start times from 09:00am

Event Distance:

26.2 miles / 42km