ATW Watford Half Marathon
This popular event has a strong history within the running community and has been taking place for over 40 years! Join a day of running, community spirit and exciting experiences. Spot £2000 prize!
Sign up From £30
- Sun 7 Feb 2027
10:00
Age 17 & over
From £30
- 13.1 miles road running + 751 ft ascent
Event overview
An exhilarating event with thousands of runners that combines fitness, fun, and community support.
The day kicks off with a 1.8km Fun Run around the Park, giving parents and supporters a great chance to cheer on their little athletes.
The half marathon starts in Cassiobury Park and follows fully closed roads, venturing into serene countryside lanes behind the Grove Hotel and Golf Course. Runners will pass through Bucks Hill, Commonwood Common, and Chandlers Cross before looping back to the stunning Cassiobury Park.
Highlights
Lead car and cycle escort
The event will be preceeded by a lead car and cyclists, ensuring a smooth and safe journey for all participants throughout the course.
RaceCheck Gold Award
This event has proudly earned the 'Racecheck Gold Award', a prestigious, independent accolade given to running events scoring over 96% in participant reviews.
Musical entertainment
Enjoy the rhythm of the course with music, including the beats of our amazing drummer, adding excitement and motivation to your run!
Ideal London Marathon training
Whether you're gearing up for the London Marathon or seeking a challenging yet scenic route, the Watford Half Marathon is the perfect opportunity to test your skills and stamina.
Spot prize
One lucky Half Marathon runner stands a chance to win an incredible spot prize of £2000! Will it be you?
Vibrant event village
Embrace the lively atmosphere at the event village, filled with activities, stalls, and a fantastic community spirit.
PB pacers
Pacers in both the 10K and half marathon. When you get to the venue, please look out for pacers with their flags and feel free to join then for the event.
Finish line goodies and unique medal
Celebrate your achievement with special finish line goodies and receive a one-of-a-kind medal as a testament to your accomplishment.
Free photos
Capture the unforgettable moments with free professional photos, preserving memories of your incredible run.
Professional commentator
Feel the excitement as professional commentators set you off at the Start and cheer you on at the Finish line, making your acheivements even more memorable.
This event is part of ATW Watford Half Marathon, 10K & Fun Run.
Event photos
Event video
- Average fitness
- Beginner-friendly
- Event village
- Families
- Spectators
- Traders at event
Herts SEnior Half Marathon Champs
This event features the Hertfordshire Senior Half Marathon Championships. To be eligible, you must have been born in Hertfordshire or been a resident for 9 months. Please state your eligibility during the registration process.
Hertfordshire Senior County Championship Prizes
- Prizes available for the first 3 men's and first 3 women's Hertfordshire Clubs Teams
- Men's Team: First 4 finishers to score
- Women's Team: First 3 finishers to score
- Bone conducting headphones only
- Entertainment
- First aid
- Marshals
- No headphones
- Single start
- Undulating
- Way markers
- GPX available
GPX route
The route is displayed on the map above.
Overview
A scenic yet testing route through Watford and the surrounding countryside, combining town centre streets with rolling rural roads for a varied and rewarding run.
The half marathon starts in Cassiobury Park and follows fully closed roads, venturing into serene countryside lanes behind the Grove Hotel and Golf Course. Runners will pass through Bucks Hill, Commonwood Common, and Chandlers Cross before looping back to the stunning Cassiobury Park.
Route highlights
- Start and finish in Watford town centre
- Mix of urban streets and country lanes
- Undulating profile with some challenging climbs
- Closed roads for a safer race experience
- Supportive local crowds along key sections
- Clearly marked course with distance markers
- Entertainment
- Music
- Park
- Toilets
Event HQ
Cassiobury Park Avenue
Shepherds Road
Watford
Hertfordshire
WD18 7HF
UK
There is no organised parking available at Cassiobury Park. Parking is plentiful in Watford City Centre and there are plenty of public transport options available, including both rail and bus.
- Cash prizes
- Chip timing
- Goody bag
- Map
- Medal
- Race photo
Included
- All finishers will receive a custom-made, themed medal at the end of the race
- Musical entertainment
- Chance of a £2000 spot prize!
- Vibrant event village
- Pacers
- Finish line goodies
- Free photos
- Professional commentator
Optional extras
- ICE Band (£22.94)
- Watford Half Marathon event t-shirt (£10)
Prizes
- Hertfordshire county championship prizes
- Prizes available for the first 3 men's and first 3 women's Hertfordshire club teams.
- Men's Team: First 4 finishers to score.
- Womens Team: First 3 finishers to score.
Absolutely fantastic event with seamless organisation. Pierre R
Excellent event. One of the toughest half marathons in the local area due to the time of year and undulating course. As always, brilliantly organised with great entertainment and marshals. Sanjay R
Absolutely fantastic event with seamless organisation. Jacob H
The course was perfectly marked and the entire event was flawlessly managed. Highly recommended! Michal S
Loved every moment of this event. The atmosphere was great! John N
Great event and beautiful course. A must do for any serious athlete! Charlie C
Amazing course and support, everything was top notch. Can’t wait to race again next year! Jay P
Excellent event. Ali A
Excellent atmosphere and supporting staff at the water stations. Maggie T
The best ever event! I had a fabulous time. Wera I
Amazing course and support, everything was top notch. Can’t wait to race again next year! Rob P
Enjoyable race with a great atmosphere and decent organisation. Iain B
Great event. Shelley D
The course was perfectly marked and the entire event was flawlessly managed. Highly recommended! Barbara L
It was a great event! Karen K
Great event. Well organised and signposted. Great marshals and pacers. Fab event! Only improvement would be a bigger drink at the finish. Kitty C
Overall a solid event. I’d do it again! Matthew D
Had a good experience overall. The course was fun and volunteers were supportive! Rachel B
Reviews thanks to RaceCheck
- Public transport links
- Recycling
- Sustainability policy
Here are the ways this event cares for the environment:
Summary
- Recycling bins
- Recycling gets separated from general waste
- Finish line water bottles made from recycled material
- Refill taps are provided so participants can bring their own bottle and fill up during the event
- The choice of paper cups at water stations
- Signage including course marking attached with reusable garden wire instead of plastic cable ties
- 'Dynamic bib assignment’ removes the need for envelopes, sticker labels and excess waste
- Bike racking is provided to promote cycling to the events
This event supports the Peace Hospice Care, Watford.
- Age 17 & over
- Entries open
- Collect race pack
- Enter online
- Event merch available
- Series discount
Entry fees
Early bird entry fee
From £30.00
Early bird entry fee
From £32.00