Thames Riverside 20

The Thames Riverside 20 is a paced, 20-mile running race along the River Thames Towpath, organized by Clapham Chasers Running & Triathlon Club. Taking place at Old Deer Park in Richmond, London, the course is flat, traffic-free, and mostly off-road, featuring varied terrain such as gravel and mud. Runners can choose from several pace groups, with water and energy drinks available at multiple points.

The event emphasizes safety, with marshals, first aid, and no headphone use. Participants receive race packs, and post-race cakes are provided as a tradition. The race aims to be inclusive, welcoming runners of all levels, with results available immediately after completion. Visit the organization's website for the most recent information.