Blackwater Marathon
Heybridge, United Kingdom • 25 Oct 2025
The Blackwater Marathon is an annual event held at Drapers Farm Sports Club in Heybridge, Essex. Celebrating its 25th edition in 2025, the marathon features a circular route on the north side of the River Blackwater estuary, combining cross country footpaths and seawall sections. Participants can choose between two distances: 26.5 miles with three checkpoints or 18 miles with two checkpoints. The event offers refreshments at the start, snacks at checkpoints, and a light meal at the finish, along with a finisher’s certificate. It is part of the Essex & Herts Triple Challenge and requires suitable gear due to potentially muddy and windy marsh conditions. Visit the organization's website for the most recent information.