The Hillingdon 20 (formerly the Finchley 20) is the UK’s longest-running 20-mile race, offering a vital training milestone for anyone preparing for the London Marathon or other spring marathons. Hosted by Hillingdon AC, this well-established event is designed by runners, for runners—combining experience, organisation, and community. The course features a challenging, hilly 20-mile route on road, ideal for simulating the effort of marathon day. With chip timing, over 70 enthusiastic marshals, and on-site medical support, you'll be well-supported throughout your race. After the finish, make use of changing rooms, showers, and refreshments at the Hillingdon AC clubhouse.