Run Dorney Lake Half Marathon, 10K & 5K - December

A chip-timed flat running event at Dorney Lake, Windsor, offering 5k, 10k and half marathon distances at the London 2012 Olympic rowing venue.

Run Dorney Lake Half Marathon, 10k & 5k - December takes place on Saturday 12 December 2026 at Dorney Lake, the London 2012 Olympic rowing venue, near Windsor.

Date: Saturday 12 December 2026
Start time: 9.10am (all distances)
Event end: 12.10pm
Location: Dorney Lake, Court Lane (off Lake End Road), Windsor SL4 6FJ

This chip-timed event offers a flat course suitable for personal bests, with 5k, 10k and Half Marathon options.

Course details:

• Half marathon: 4 laps + U-turn each lap (road terrain), elevation approx. 27m
• 10k: 2 laps (road terrain), elevation approx. 15m
• 5k: 1 lap (road terrain), elevation approx. 8m

What’s included:

• Unique themed medal
• Free race photos
• Chip-timed results
• Post-race goodies

Price: £29.68 – £36.04 (by distance).