ATW Watford Half Marathon
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ATW Watford Half Marathon & 10K
The ATW Watford Half Marathon & 10K takes place on Sunday, February 7, 2027, at Cassiobury Park Avenue, Watford, Hertfordshire. The event includes multiple race distances and an event village with stalls and entertainment.
- 1.8 km Family Fun Run within Cassiobury Park
- 10K multi-terrain route
- Half marathon on closed roads
The 10K starts alongside the half marathon, leaves the park onto traffic free roads, diverges at about 4 km, follows the Grand Union Canal towpath for roughly 3 km, then moves onto woodland trails and finishes past event HQ. The 10K has no cut-off time; entries are limited and the race sold out in 2026.
The half marathon runs on fully closed roads into nearby country lanes, passing Bucks Hill, Commonwood Common and Chandlers Cross before returning to Cassiobury Park. There is a cut off of 2 hours 45 minutes at the 11 mile point due to road reopenings.
Event features include eligibility for the Hertfordshire Senior half marathon championships for those born in Hertfordshire or resident for nine months with eligibility declared at entry, a lead car and cycle escort, Racecheck Gold Award recognition, musical entertainment including a drummer, pacers in both races, finish line goodies, a unique medal and free professional photos.
Entry fees range from £14 to £45. There is no organised parking at Cassiobury Park; parking is available in Watford city centre and public transport options include rail and bus. The event partner charity is Alzheimer’s Research UK. ATW allows transfers to a future ATW event up to 48 hours before the event but does not offer refunds or transfers to another person. Visit the organization's website for the most recent information.
