Riverside Marathon & Half Marathon
Sunbury-on-Thames, United Kingdom • 29 Nov 2025
The Riverside Marathon & Half Marathon, organized by Phoenix Running, takes place in Walton on Thames, Surrey, along the scenic River Thames towpath. This UK Athletics certified event features flat, fast, and accurately measured courses with no elevation gain, ideal for runners seeking personal bests. Participants run either 4 laps for the half marathon or 8 laps for the full marathon, enjoying a peaceful riverside trail from Walton towards Hampton Court and back. The event is part of the Icebird/Firebird four-race series and offers medals to all finishers. Entry is limited, emphasizing a low-key, inclusive atmosphere for runners of all levels. Visit the organization's website for the most recent information.