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Half Marathons Found In Watford

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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

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Ouse Valley Way Marathon and Half Marathon 2026

St Neots, Cambridgeshire
Sun 20 Sep 26
£29.00 - £43.00
4.3
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Hever Castle Run Series

Edenbridge, Kent
Sun 27 Sep 26
£28.22 - £52.41
4.2

On Sale
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The Hurt

Guildford, Surrey
Sat 10 Oct 26
£31.00 - £35.00
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Running Tribe Races

Course 1,2,3 are at - Chalfont Park Sports Club Chalfont Park, SL9 0QA. Course 4,5,6,12 are at - Chalfont St. Peter Community Centre , SL9 9QX. Course - 7,8   are at - Amersham Cricket Club, Missenden Rd, Old Amersham, Bucks, HP7 0RN Course - 9   is at - Sarratt Village Hall, The Green, Sarratt,,Nr Rickmansworth, Herts WD3 6AS Course - 10,11 are at - Chesham & District Community Association, White Hill Centre, White Hill, Chesham,  Bucks, HP5 1AG.
Sun 25 Oct 26
£40.00

London 1.5k, 5k, 10k and Half Marathon MoRun

London
Sun 08 Nov 26
£12.00 - £30.00
5.0

PHOENIX - Wild Goose Chase

Walton-on-Thames, Surrey
Sat 14 Nov 26
£22.00 - £40.00

Battersea Park 5k, 10k & Half Marathon

London
Sat 14 Nov 26
£36.00 - £42.00
4.7

RUN Battersea Park Half Marathon

Battersea Park next to the Bandstand - SW11 4NJ
Sun 15 Nov 26
£41.60
4.6

PHOENIX - Chicken Run

Walton-on-Thames, Surrey
Sun 15 Nov 26
£22.00 - £40.00

The Smurf Run

The Last Hop, Unit 2, Thames Edge Court, Clarence Street, Staines, TW18 4SU
Sun 15 Nov 26
£18.00 - £35.00

Run For Your Life

The Last Hop, Unit 2, Thames Edge Court, Clarence Street, Staines, TW18 4SU
Sat 21 Nov 26
£18.00 - £35.00

THAMES PATH TRAIL RUN

Windsor, Berkshire
Sat 21 Nov 26
£37.50 - £42.50

Kingston Half Marathon

Kingston upon Thames, Surrey
Sun 22 Nov 26
£40.45

WIMBLEDON 10K & HALF MARATHON

London
Sun 22 Nov 26
£34.00 - £38.00
4.8

Christmas Lights Half Marathon 2026

London, Greater London
Mon 23 Nov 26 - Mon 04 Jan 27
£21.00

The STAR Backyard PEASLAKE

Peaslake Community Hall, Peaslake, Surrey, GU5 9RR
Fri 27 Nov 26
£20.00 - £50.00

Running Tribe Races

Course 1,2,3 are at - Chalfont Park Sports Club Chalfont Park, SL9 0QA. Course 4,5,6,12 are at - Chalfont St. Peter Community Centre , SL9 9QX. Course - 7,8   are at - Amersham Cricket Club, Missenden Rd, Old Amersham, Bucks, HP7 0RN Course - 9   is at - Sarratt Village Hall, The Green, Sarratt,,Nr Rickmansworth, Herts WD3 6AS Course - 10,11 are at - Chesham & District Community Association, White Hill Centre, White Hill, Chesham,  Bucks, HP5 1AG.
Sat 28 Nov 26
£40.00

PHOENIX - Riverside Marathon & Half Marathon

Walton-on-Thames, Surrey
Sat 28 Nov 26
£33.50
4.5

The London Riverside 1.5k, 10k and Half marathon MoRun

Richmond, Surrey
Sun 29 Nov 26
£12.00 - £30.00

RUN Victoria Park Half Marathon Autumn

Victoria Park, E9 5HT
Sun 29 Nov 26
£41.60

PHOENIX - Christmas Advent Run

Walton-on-Thames, Surrey
Sun 29 Nov 26
£22.00 - £39.95

The Donut Dash

The Last Hop, Unit 2, Thames Edge Court, Clarence Street, Staines, TW18 4SU
Sun 29 Nov 26
£18.00 - £35.00

FINSBURY PARK 5K, 10K & HALF MARATHON

London
Sun 29 Nov 26
£30.00 - £34.00
4.3

CRYSTAL PALACE 5K 10K, HALF MARATHON & JUNIORS

London
Sun 29 Nov 26
£12.00 - £37.00
4.7

Gremlins Christmas Half & Marathons

Milton Keynes, Buckinghamshire
Fri 04 Dec 26 - Sun 06 Dec 26
£37.99 - £44.99

The Snow Globe Gallop Bobble Hat Run

The Last Hop, Unit 2, Thames Edge Court, Clarence Street, Staines, TW18 4SU
Sat 05 Dec 26
£18.00 - £41.82

PHOENIX - Christmas Gonk

Walton-on-Thames, Surrey
Sat 05 Dec 26
£22.00 - £40.00

Battersea Park 5k, 10k & Half Marathon

London
Sat 05 Dec 26
£36.00 - £42.00
4.7

London Running Festival

London
Sun 06 Dec 26
£30.00 - £34.00

London Running Festival December

London
Sun 06 Dec 26
£30.00 - £34.00

The Christmas Jumper Jaunt

The Last Hop, Unit 2, Thames Edge Court, Clarence Street, Staines, TW18 4SU
Fri 11 Dec 26
£18.00 - £35.00

Phoenix - Christmas Jumper FRIDAY Run

Walton-on-Thames, Surrey
Fri 11 Dec 26
£49.95

Running Tribe Races

Course 1,2,3 are at - Chalfont Park Sports Club Chalfont Park, SL9 0QA. Course 4,5,6,12 are at - Chalfont St. Peter Community Centre , SL9 9QX. Course - 7,8   are at - Amersham Cricket Club, Missenden Rd, Old Amersham, Bucks, HP7 0RN Course - 9   is at - Sarratt Village Hall, The Green, Sarratt,,Nr Rickmansworth, Herts WD3 6AS Course - 10,11 are at - Chesham & District Community Association, White Hill Centre, White Hill, Chesham,  Bucks, HP5 1AG.
Sat 12 Dec 26
£40.00

Battersleigh 5k, 10k & Half Marathon

London
Sat 12 Dec 26
£36.00 - £40.00

Victoria Park Half Marathon, 10k & 5k

London
Sat 12 Dec 26
£30.00 - £38.00
4.7

Run Dorney Lake Half Marathon, 10k & 5k - December

Dorney Lake, Court Lane, off Lake End Road, Windsor SL4 6FJ
Sat 12 Dec 26
£29.68 - £36.04
4.4

Richmond Park Half Marathon

Richmond, Surrey
Sun 13 Dec 26
£40.00
4.4

Lee Valley Velo Park - December

London, Greater London
Sat 19 Dec 26
£12.00 - £142.00
4.7

Die Hard Christmas Jumpers Marathon & Half Marathon

Milton Keynes, Buckinghamshire
Wed 23 Dec 26
£39.99 - £44.99
4.0

Die Hard Christmas Jumpers Marathon & Half Marathon

Milton Keynes, Buckinghamshire
Thu 24 Dec 26
£39.99 - £46.99
4.0

Christmas Day Cracker Run 2026

The Last Hop, Unit 2, Thames Edge, 15-18 Clarence St, Staines TW18 4SU
Fri 25 Dec 26
£18.00 - £88.88

Boxing Day Challenge

Wraysbury Skiff and Punting Club, Riverside, Egham TW20 0AA
Sat 26 Dec 26
£27.00 - £35.00

Year End Time Turner 2026

The Last Hop, Unit 2, Thames Edge, 15-18 Clarence St, Staines TW18 4SU
Sun 27 Dec 26
£18.00 - £35.00
4.0

Phoenix Crystal Palace - Alice in Runderland

London
Sun 27 Dec 26
£22.00 - £39.95
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