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Half Marathons Found in the South East

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Half Marathons In the South East 2025 - 2026

The most comprehensive list of Half Marathons in the South East in 2025 - 2026 and South of England including Half Marathons in London, Southampton, Oxford, Reading, Portsmouth, Brighton and Slough. Find your perfect race!

Top Tip: Viewing this page in the default “Featured view” will show you all the Best Half Marathons in and around the South East. If you’re ready to set yourself a challenge right now then switching to “Bookable view” will show you those that can be booked instantly and securely through Find A Race. Guarantee your place today and get training :-)


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London

Race Calendar: Half Marathons In the South East

🚀Boosted

Harrold-Odell Country Park - Bedfordshire. 10km, 25km & 50km Trail Races.

Bedford, Bedfordshire
08 Mar 25
£32.00 - £55.00
🚀Boosted

MK Marathon Weekend

Stadium MK, Stadium Way Milton Keynes, BUCKS MK1 1ST United Kingdom
04 May 25 - 05 May 25
£13.05 - £149.59

PHOENIX - King of the Rungle

Walton-on-Thames, Surrey
11 Oct 25
£22.00 - £40.00

Chelmsford Marathon & Half Marathon

Central Park, Chelmsford, Essex, CM2 0FQ.
12 Oct 25
£33.78 - £61.58

BATTERSEA PARK RUNNING FESTIVAL

London
12 Oct 25
£7.00 - £152.00

Back to the Future 40th Anniversary Marathons & Half Marathons

Milton Keynes, Buckinghamshire
18 Oct 25 - 19 Oct 25
£34.99 - £42.99

Bedgebury Forest Half Marathon & 10K

Bedgebury National Pinetum & Forest, Bedgebury Road, Goudhurst, Kent, TN17 2SJ
19 Oct 25
£7.68 - £33.06

Running GP at Goodwood Motor Circuit October

Chichester, West Sussex
19 Oct 25
£28.00 - £142.00
4.5

LEE VALLEY VELOPARK - MILE, 5K, 10K, 10 MILE & HALF MARATHON

London, Greater London
25 Oct 25
Free - £122.00
4.6

River Thames Half Marathon 2025

Walton-on-Thames, Surrey
26 Oct 25
£34.00

Richmond Park Half Marathon

London
26 Oct 25
£38.00 - £172.00
4.4

Maidenhead Half Marathon

Maidenhead, Berkshire
26 Oct 25
£34.00 - £152.00

THAMES PATH TRAIL RUN

Windsor, Berkshire
26 Oct 25
£35.00 - £40.00

Wendover Woods Marathon, Half Marathon & 10k

Wendover Woods, Upper Icknield Way, Aston Clinton, HP22 5NQ
02 Nov 25
£6.65 - £48.96

Hertfordshire Half Marathon & 10k

Knebworth, Hertfordshire
02 Nov 25
£32.00 - £172.00
4.5

Enigma Fireworks Marathons & Half Marathons

Milton Keynes, Buckinghamshire
07 Nov 25 - 08 Nov 25
£34.99 - £43.99

SOUTH DOWNS TRAIL RUN

Chichester, West Sussex
08 Nov 25
£30.00 - £40.00

GBR Run Bexhill Remembrance Run

Bexhill on Sea, East Sussex
08 Nov 25
£7.50 - £30.00

PHOENIX - Lest We Forget - 2025

Sunbury on Thames, Middlesex
08 Nov 25
£22.00 - £39.95

VICTORIA PARK 5K, 10K & HALF MARATHON

London
08 Nov 25
£28.00 - £152.00
4.7

RUN DORNEY 5K, 10K & HALF MARATHON

Windsor, Berkshire
09 Nov 25
£30.00 - £142.00
4.2

The One by the Canal

Watford, Hertfordshire
09 Nov 25
£35.00

Richmond Park Half Marathon

London
09 Nov 25
£38.00 - £172.00
4.4

PHOENIX - Remembrance Day Marathon & Half Marathon

Sunbury on Thames, Middlesex
09 Nov 25
£39.95

Battersea Park Half Marathon

London
15 Nov 25
£37.00 - £162.00
4.8

NEW FOREST CENTRAL TRAIL RUN

Brockenhurst, Hampshire
15 Nov 25
£30.00 - £40.00

The Hartfield Honey Run - 2025

Hartfield, East Sussex
16 Nov 25
£20.00 - £30.00
4.2

WIMBLEDON 10K & HALF MARATHON

London
23 Nov 25
£32.00 - £162.00
4.5

PHOENIX - Riverside Marathon & Half Marathon

Sunbury on Thames, Middlesex
29 Nov 25
£33.50
4.0

WITTERING BEACH RUN

Chichester, West Wittering, West Sussex
29 Nov 25
£30.00 - £40.00

FINSBURY PARK 5K, 10K & HALF MARATHON

London
30 Nov 25
£28.00 - £132.00
4.2

PHOENIX - Christmas Advent Run

Sunbury on Thames, Middlesex
30 Nov 25
£22.00 - £39.95

Gremlins Christmas Half & Marathons

Milton Keynes, Buckinghamshire
05 Dec 25 - 06 Dec 25
£34.99 - £42.99

Sussex Downs Trail Run

Lewes, Plumpton, East Sussex
06 Dec 25
£30.00 - £40.00

Deja Vu Marathon & Half Marathon

Milton Keynes, Buckinghamshire
07 Dec 25
£34.99 - £43.99

Running GP at Goodwood Motor Circuit – December

Chichester, West Sussex
07 Dec 25
£28.00 - £142.00
4.5

RUN DORNEY 5K, 10K & HALF MARATHON

Windsor, Berkshire
13 Dec 25
£30.00 - £162.00
4.2

VICTORIA PARK 5K, 10K & HALF MARATHON

London
13 Dec 25
£28.00 - £152.00
4.7

CRYSTAL PALACE 5K 10K, HALF MARATHON & JUNIORS

London
14 Dec 25
£7.00 - £122.00
4.6

LEE VALLEY VELOPARK - MILE, 5K, 10K, 10 MILE & HALF MARATHON

London, Greater London
20 Dec 25
Free - £122.00
4.6

Die Hard Christmas Jumpers Marathon & Half Marathon

Milton Keynes, Buckinghamshire
24 Dec 25
£34.99 - £42.99

PHOENIX - Year End Marathon & Half Marathon

Sunbury on Thames, Middlesex
28 Dec 25
£33.50
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