ATW Watford Half Marathon
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Event overview
The ATW Watford Half Marathon, 10K and Family Fun Run takes place on 1 February 2026 at Cassiobury Park Avenue, Watford, Hertfordshire (WD18 7HF). The event is organised by ATW, established in 2011. Distances offered:
- Half Marathon
- 10K
- 1.8 km Fun Run (stays within Cassiobury Park; under-8s must be accompanied by a full paying adult)
Course, services and prizes
The Half Marathon uses fully closed roads and passes through countryside lanes behind Grove Hotel and Golf Course, including Bucks Hill, Commonwood Common and Chandlers Cross, before returning to Cassiobury Park. The 10K starts with the Half Marathon field, then splits onto the Grand Union Canal towpath and a woodland path, finishing past the event headquarters. A lead car will escort the field. Pacers are provided for both the Half Marathon and the 10K.
Event features include a village area, musical entertainment (including a drummer), a professional commentator at the finish, free professional photos, finish-line goodies and a unique medal. The event earned a Racecheck Gold Award in 2023. One competitor will be chosen at random to win a £2,000 spot prize. The Half Marathon hosts the Hertfordshire Vets championship; eligibility requires birth in Hertfordshire or nine months residency and must be stated at registration. County team prizes and full results by category will be posted via chip timing. Refunds are not offered; entries may be transferred to a future ATW event up to 48 hours before the event without proof. Visit the organization's website for the most recent information.