watfordharriers.org.uk

ATW Watford Half Marathon & 10K

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Watford, East of England, United Kingdom

calendar_today 01 Feb, 2026

nordic_walking Others

directions_run Running

About the Event

Kick off your racing year with a vibrant and historic community event in the heart of Hertfordshire. The Watford Half Marathon & 10K, celebrating over 40 years of running tradition, returns on Sunday, 1 February 2026 with a thrilling route starting in the picturesque Cassiobury Park. Choose between the fast, canal-side 10K or the challenging half marathon on fully closed rural lanes, complete with pacers, live music, and the chance to win a £2000 cash spot prize. As the official Hertfordshire Senior Half Marathon Championships, it attracts a competitive field while maintaining a fantastically festive atmosphere for runners of all levels, including a family fun run. Experience the electric energy of a Racecheck Gold Award-winning event, where professional organization meets genuine community spirit, making it the perfect season opener or London Marathon training benchmark. Secure your spot for a brilliantly organized day of personal achievement and celebration.

Races Offered

10 km

Feb 01, 2026

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Distance — 10K

terrain

Type — Others, Running

timer

10:00

Half Marathon

Feb 01, 2026

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Distance — 21.1K

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Type — Others, Running

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10:00

Weather Overview

These values represent the 3-year monthly averages for February in Watford.

Temp (°C)

Feels Like (°C)

thermostat 3.7° / 10.0°

wb_sunny -0.8° / 5.5°

Wind (km/h)

Humidity (%)

air 17.1 /

water_drop 84.6%

Temp (°C)

Feels Like (°C)

Wind (km/h)

Humidity (%)

thermostat 3.7° / 10.0°

wb_sunny -0.8° / 5.5°

air 17.1 km/h

water_drop 84.6%

About Watford

Learn more about the host city, Watford.

Watford is a large town in Hertfordshire, a few miles from the Greater London boundary. It is around 20 minutes from central London using National Rail trains, and slightly longer on the London Underground and Overground networks. Warner Bros. Studio Tour London is on the outskirts of Watford, while the town centre is home to the Colosseum music venue, the Atria shopping centre and Watford Market.