0183
Half Marathons Found In Watford
View all ↓Half Marathons in Watford 2026 - 2027
The most comprehensive list of Half Marathons in and near Watford in 2026 - 2027. Find your perfect race!
If you've been putting in miles along the Grand Union Canal towpath or through Cassiobury Park, you'll know that Watford is flatter than most of Hertfordshire, and that makes a difference at the half marathon distance. Thirteen miles on forgiving ground is a different proposition to thirteen miles with hills in the way, and Watford gives you a fair shot at a time you'll actually be pleased with. It's one of the better spots in the region if a PB is what you're after. If you'd rather build up first, 10k runs in Watford are a good place to start.
Have a look and pick one that works with your training. When the half marathon feels comfortable and you want to know what 26.2 feels like, marathons in Watford are the next step up.
Looking for more options?
Explore half marathons across the East of England with half marathons near Basildon, half marathons in Bedford or half marathons in Cambridge.
Race Calendar: Half Marathons Found In Watford
🚀Boosted
Running Tribe Races
Course 1,2,3 are at - Chalfont Park Sports Club Chalfont Park, SL9 0QA. Course 4,5,6 are at - Chalfont St. Peter Community Centre , SL9 9QX.
Sun 25 Oct 26
£38.69
Richmond Park Half Marathon
Richmond, Surrey
Sun 20 Sep 26
£40.00
4.4
Run Reigate Half Marathon, 10k, 5k & Kids Race
Reigate, Surrey
Sun 20 Sep 26
£19.00 - £42.00
4.0
PHOENIX - Hedgie Hog Jog
Walton-on-Thames, Surrey
Sun 20 Sep 26
£22.00 - £40.00
Phoenix Crystal Palace - Retro Run
London
Sun 20 Sep 26
£22.00 - £39.95
PHOENIX - Cakeathon
Walton-on-Thames, Surrey
Sat 26 Sep 26
£22.00 - £40.00
Run Dorney Lake Marathon, Half Marathon, 10k & 5k - September
Dorney Lake, Court Lane, off Lake End Road, Windsor SL4 6FJ
Sat 26 Sep 26
£29.68 - £42.40
4.4
Battersea Park 5k, 10k & Half Marathon
London
Sat 26 Sep 26
£36.00 - £42.00
4.8
Clapham Common 5k, 10k & Half Marathon
London
Sun 27 Sep 26
£32.00 - £34.00
PHOENIX - Chocothon
Walton-on-Thames, Surrey
Sun 27 Sep 26
£22.00 - £40.00
Windsor Half Marathon 2026
Windsor, Windsor and Maidenhead
Sun 27 Sep 26
£44.00 - £48.00
4.8
Wizz Air Ealing Half Marathon 2026
London
Sun 27 Sep 26
£55.89 - £57.89
Midweek Chasing Numbers Oct 2026
Wraysbury Skiff and Punting Club, Riverside, Egham TW20 0AA
Fri 02 Oct 26
£18.00 - £27.00
Run Dorney Lake Half Marathon, 10k & 5k - October
Dorney Lake, Court Lane, off Lake End Road, Windsor SL4 6FJ
Sat 03 Oct 26
£29.68 - £36.04
4.4
Victoria Park Half Marathon, 10k & 5k
London
Sat 03 Oct 26
£30.00 - £38.00
4.7
The Autumn Lucky Dip Run
The Last Hop, Unit 2, Thames Edge Court, Clarence Street, Staines, TW18 4SU
Sun 04 Oct 26
£18.00 - £35.00
Thames Meander Autumn
Richmond, Greater London
Sun 04 Oct 26
£37.36 - £58.59
4.1
Kingston Half Marathon 2026
Kingston upon Thames, Surrey
Sun 04 Oct 26
£44.50
5.0
ATW Welwyn Half Marathon & 10k
Gosling Sports Park, Stanborough Road, Welwyn Garden City, Hertfordshire, AL8 6XE
Sun 04 Oct 26
£34.98 - £43.46
5.0
Epping Forest Half Marathon & 10K Wildwood Trail Series
London
Sat 10 Oct 26
£27.00 - £37.00
The Hurt
Guildford, Surrey
Sat 10 Oct 26
£31.00 - £35.00
Hampton Court Palace Running Festival Presented by Voltarol
East Molesey, Greater London
Sun 11 Oct 26
£42.00 - £47.00
4.2
The Richmond Autumn Riverside 10k and Half Marathon Run
Richmond, Greater London
Sun 11 Oct 26
£25.00 - £30.00
4.6
PHOENIX BEDFORDSHIRE Freaky Phoenix Friday
Biggleswade, Bedfordshire
Fri 16 Oct 26
£22.00
Lee Valley Velo Park - October
London, Greater London
Sat 17 Oct 26 - Sat 24 Oct 26
£12.00 - £34.00
4.7
PHOENIX BEDFORDSHIRE Skull Runner
Biggleswade, Bedfordshire
Sat 17 Oct 26
£22.00 - £39.95
Richmond Park Half Marathon
Richmond, Surrey
Sun 18 Oct 26
£40.00
4.4
Windsor Dorney Lakeside Half Marathon
Dorney Lake, Off Court Lane, Windsor, Berks, SL4 6QP
Sun 18 Oct 26
£36.21
Henley Half Marathon
Henley-on-Thames, Oxfordshire
Sun 18 Oct 26
£10.00 - £40.00
4.9
BATTERSEA PARK RUNNING FESTIVAL
London
Sat 24 Oct 26
£12.00 - £47.00
4.5
Scare Bear Run 2026
The Last Hop, Unit 2, Thames Edge Court, Clarence Street, Staines, TW18 4SU
Sat 24 Oct 26
£18.00 - £35.00
River Thames Half Marathon 2026
Walton-on-Thames, Surrey
Sun 25 Oct 26
£39.50
4.8
Running Tribe Races
Course 1,2,3 are at - Chalfont Park Sports Club Chalfont Park, SL9 0QA. Course 4,5,6 are at - Chalfont St. Peter Community Centre , SL9 9QX.
Sun 25 Oct 26
£38.69
Maidenhead Half Marathon & 10k
Maidenhead, Berkshire
Sun 25 Oct 26
£32.00 - £40.00
5.0
The Horrorwood Halloween Run
The Last Hop, Unit 2, Thames Edge Court, Clarence Street, Staines, TW18 4SU
Sat 31 Oct 26
£18.00 - £35.00
Wendover Woods Marathon, Half Marathon & 10k
Wendover Woods, Upper Icknield Way, Aston Clinton, HP22 5NQ
Sun 01 Nov 26
£7.68 - £50.00
4.6
Richmond Half Marathon Autumn
Old Deer Park - Richmond Upon Thames TW9 2SF
Sun 01 Nov 26
£41.51
Run London Victoria Park Half/10k/5k
London
Sun 01 Nov 26
£15.00 - £30.00
1.1
ATW Bedford 10k & Half Marathon
Russell Park, Bedford, Bedfordshire, MK40 3RH
Sun 01 Nov 26
£34.98 - £43.46
5.0
Hertfordshire Half Marathon & 10k
Knebworth, Hertfordshire
Sun 01 Nov 26
£40.00 - £47.00
4.5
We Will Remember Poppy Run
The Last Hop, Unit 2, Thames Edge Court, Clarence Street, Staines, TW18 4SU
Fri 06 Nov 26
£18.00 - £35.00
Showing 41-80 of 183 results