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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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Hever Castle Run Series

Edenbridge, Kent
Sun 27 Sep 26
£37.63 - £69.88
4.2
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Thames Meander Autumn

Richmond, Greater London
Sun 04 Oct 26
£37.36 - £58.59
4.1
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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

CRYSTAL PALACE 5K 10K, HALF MARATHON & JUNIORS

London, Greater London
Sun 31 Jan 27
£12.00 - £37.00
4.7

Windsor Trail Half Marathon & 10k

Windsor, Berkshire
Sun 31 Jan 27
£37.00 - £45.00

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.
Sun 31 Jan 27
£40.00

The Zipping Zebra Run

The Last Hop, Unit 2, Thames Edge Court, Clarence Street, Staines, TW18 4SU
Sat 06 Feb 27
£18.00 - £36.00

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 06 Feb 27
£40.00

ATW Watford Half Marathon & 10K

Cassiobury Park Avenue, Watford, Hertfordshire, WD18 7HF
Sun 07 Feb 27
£14.84 - £47.70
5.0

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 07 Feb 27
£40.00

Battersea 5k, 10k & Half Marathon

London
Sat 13 Feb 27
£36.00 - £42.00
4.8

The Fleeting Frog Run

The Last Hop, Unit 2, Thames Edge Court, Clarence Street, Staines, TW18 4SU
Sat 13 Feb 27
£18.00 - £36.00

Hampton Court Half Marathon 2027

Thames Ditton, Surrey
Sun 14 Feb 27
£39.50
4.4

Richmond Park Half Marathon

Richmond, Surrey
Sun 14 Feb 27
£40.00
4.4

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 14 Feb 27
£40.00

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 20 Feb 27
£40.00

The Tiger Trot

The Last Hop, Unit 2, Thames Edge Court, Clarence Street, Staines, TW18 4SU
Sat 20 Feb 27
£18.00 - £36.00

Phoenix Crystal Palace - Strictly Running

London
Sun 21 Feb 27
£22.00 - £39.95

Dartford Half Marathon, 10k & Junior

Dartford, Kent
Sun 21 Feb 27
£12.00 - £42.00
4.5

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 21 Feb 27
£40.00

ATW Bedford Half Marathon & 10k

Russell Park, Bedford, Bedfordshire, MK40 3RH
Sun 21 Feb 27
£37.10 - £45.58
5.0

Victoria Park Half Marathon, 10k & 5k

London
Sat 27 Feb 27
£30.00 - £38.00
4.7

The Meerkat Meander

The Last Hop, Unit 2, Thames Edge Court, Clarence Street, Staines, TW18 4SU
Sat 27 Feb 27
£18.00 - £36.00

London Half & 10k Presented by TREK

London
Sun 28 Feb 27
£11.00 - £38.00
5.0

Thames Meander Spring

Barnes Sports Club, The Club House, 261 Lonsdale Rd, London SW13 9QL
Sun 07 Mar 27
£37.36 - £58.59

Kingston Break-fest Run 8, 16 & 20mile

Kingston upon Thames, Greater London
Sun 07 Mar 27
£29.50 - £36.50
4.5

PHOENIX - Spring Marathon & Half Marathon

Walton-on-Thames, Surrey
Sat 13 Mar 27
£33.50

Run the Wild Half Marathon - Spring

Tring, Hertfordshire
Sat 13 Mar 27
£55.00
5.0

Moo-rathon, Calf and Hen K

Hyde Hall Farm, Buntingford, SG9 0RU
Sat 13 Mar 27
£31.00 - £38.00

Battersea Park Half Marathon - Spring

Battersea Park next to the Bandstand - SW11 4NJ
Sun 14 Mar 27
£41.60
4.6

Hampton Court Palace Half Marathon

East Molesey, Surrey
Sun 14 Mar 27
£43.00
4.2

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 20 Mar 27
£38.69 - £40.00

Surrey Hills Half Marathon

Guildford, Surrey
Sat 20 Mar 27
£29.00
5.0

Surrey Half Marathon, 5k & Junior Race

Woking, Surrey
Sun 21 Mar 27
£17.00 - £43.00
5.0

The Enigma Easter Series

Milton Keynes, Buckinghamshire
Fri 26 Mar 27 - Sat 27 Mar 27
£37.99 - £44.99
5.0

Victoria Park Half Marathon, 10k & 5k

London
Fri 26 Mar 27
£30.00 - £38.00
4.7

Battersea 5k, 10k & Half Marathon

London
Sat 27 Mar 27
£34.00 - £40.00
4.8

Milton Keynes Festival of Running

Milton Keynes, Buckinghamshire
Sun 28 Mar 27
£28.00 - £40.00

Battersea Park Half Marathon - March 2027

Battersea Park next to the Bandstand - SW11 4NJ
Sun 28 Mar 27
£33.11
4.6

Richmond Park Half Marathon

Richmond, Surrey
Sun 28 Mar 27
£40.00
4.4

Battersea Park 5k, 10k & Half Marathon

London
Sat 03 Apr 27
£36.00 - £42.00

Windsor Trail Half Marathon & 10k

Windsor, Berkshire
Sun 04 Apr 27
£37.00 - £45.00

Kew The Run: Half Marathon 2027

Richmond, Greater London
Sun 04 Apr 27
£30.00
4.4
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