Run Dorney Lake Half Marathon, 10k & 5k - December 2026

At Dorney Lake, near the village of Dorney in Buckinghamshire, runners compete alongside a rowing lake constructed for the Olympics. This December event features three road races: a half marathon, 10k, and 5k. All races begin in the morning and conclude by noon. RunThrough UK manages the event, with chip timing for each distance. The course is notably flat, featuring only 27m of elevation gain for the half marathon, 15m for the 10k, and 8m for the 5k. The half marathon route involves four laps with a U-turn on each, the 10k consists of two laps, and the 5k is a single lap. This setup appeals to those aiming for personal bests and individuals seeking a straightforward winter race. Included with entry are a themed medal, complimentary race photos, post-race refreshments, and access to an event village offering food and beverages.