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Dorney Lake Half Marathon, 10k & 5k

12 December 2026 · Dorney, United Kingdom

Enter on the race website
Half marathon21.1 km · 13.1 mi, also 10K, 5K
Roadterrain
0 m0 ft climbing
7°C45°F, typical on the day

All three distances start together on the flat tarmac paths around the rowing lake used for the London 2012 Olympic rowing events. The half marathon is four laps with a U-turn on each, the 10K is two laps and the 5K is one lap. The organiser lists about 27 metres of climbing for the half marathon. This is a partner event, so RunThrough member bibs and the member desk are not available.

Route from RunThrough.

Map © Mapbox © OpenStreetMap.

The Running Algorithm isn't affiliated with this race's organiser. Check the official site for the latest details.

Elevation

0 km10 km21.2 km / 13.2 mi

Typical weather

7°C45°F average
40%chance of rain
17 km/h11 mph wind

Historical averages for this place and date.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.

What could you run here?

Get a predicted time for this course from a recent race result.

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