Sun, 7 Feb 2027
Next race
Start time
TBC
Status
OpenATW Watford Half Marathon Entry, Date & Race Guide
Cassiobury Park, Watford, Hertfordshire, UK
Open
Beginner-friendlyPB-friendlyUsually sells out fast
Next race
Sunday, 7 February 2027
Location
Cassiobury Park, Watford, Hertfordshire
Distance
Half Marathon
Surface
Mixed
Entries open
Entries for the 2027 ATW Watford Half Marathon are currently open. This race usually sells out fast.
Verified 25 June 2026
Upcoming dates
Choose a date and check the latest entry options.
Race overview
About ATW Watford Half Marathon
The ATW Watford Half Marathon & 10K starts and finishes in Cassiobury Park, Watford, with a mixed-terrain course using traffic-free roads, parkland paths and woodland sections. The half marathon heads out from the park into the surrounding Hertfordshire countryside before looping back towards the finish.
A long-running fixture with more than 40 years of history, the event suits London Marathon build-up runners, club runners and those looking for a well-supported local race. The 10K option gives the event broader appeal for runners wanting a shorter, more accessible challenge.
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Shop Endurance NutritionFrequently asked questions
Is ATW Watford Half Marathon 2027 entry open?
Entries for the 2027 ATW Watford Half Marathon are currently open. This race usually sells out fast.
When is ATW Watford Half Marathon?
ATW Watford Half Marathon takes place on Sunday, 7 February 2027.
How can you enter ATW Watford Half Marathon?
Entry is currently available through general entry.
What is the ATW Watford Half Marathon course like?
The ATW Watford Half Marathon & 10K starts and finishes in Cassiobury Park, Watford, with a mixed-terrain course using traffic-free roads, parkland paths and woodland sections. The half marathon heads out from the park into the surrounding Hertfordshire countryside before looping back towards the finish.
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