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 event features UK Athletics certified, accurately measured courses with no elevation gain, making it a flat and fast route 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 race is part of the Icebird/Firebird four-race series in 2025. All finishers receive medals, and entry is limited to ensure a quality experience. Visit the organization's website for the most recent information.