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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

🚀Boosted

Ouse Valley Way Marathon and Half Marathon 2026

St Neots, Cambridgeshire
Sun 20 Sep 26
£29.00 - £43.00
4.3
🚀Boosted

Hever Castle Run Series

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

On Sale
🚀Boosted

The Hurt

Guildford, Surrey
Sat 10 Oct 26
£31.00 - £35.00
🚀Boosted

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

PHOENIX - Year End Marathon & Half Marathon

Walton-on-Thames, Surrey
Mon 28 Dec 26
£33.50
5.0

PHOENIX - Frozen Phoenix

Walton-on-Thames, Surrey
Tue 29 Dec 26
£27.00 - £40.00

PHOENIX - Winter Runderland

Walton-on-Thames, Surrey
Wed 30 Dec 26
£27.00 - £40.00
4.0

New Years Day Run 2027

The Last Hop, Unit 2, Thames Edge Court, Clarence Street, Staines, TW18 4SU
Fri 01 Jan 27
£18.00 - £36.00
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.
Sat 02 Jan 27
£39.97

Winter Enigma Marathon & Half Marathon

Milton Keynes
Sat 02 Jan 27 - Sun 03 Jan 27
£36.99 - £43.99

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 03 Jan 27
£40.00

Battersea 5k, 10k & Half Marathon

London
Sat 09 Jan 27
£36.00 - £42.00
4.8

The Safari Sprint

The Last Hop, Unit 2, Thames Edge Court, Clarence Street, Staines, TW18 4SU
Sat 09 Jan 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 09 Jan 27
£40.00

Victoria Park Half Marathon, 10k & 5k

London
Sun 10 Jan 27
£30.00 - £38.00
4.7

PHOENIX - Doughnut Dash

Walton-on-Thames, Surrey
Sun 10 Jan 27
£39.95
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 10 Jan 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 16 Jan 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.
Sun 17 Jan 27
£39.48

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 24 Jan 27
£40.00

The Winter Lucky Dip Run

The Last Hop, Unit 2, Thames Edge Court, Clarence Street, Staines, TW18 4SU
Sat 30 Jan 27
£18.00 - £33.00

Battersea Park Half Marathon - Winter

Battersea Park next to the Bandstand - SW11 4NJ
Sun 31 Jan 27
£41.60
4.6

CRYSTAL PALACE 5K 10K, HALF MARATHON & JUNIORS

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

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

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

The Meerkat Meander

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

Kingston Break-fest Run 8, 16 & 20mile

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

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
£29.00 - £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
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