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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

Bewl Water Autumn

Bewl Water Visitor Centre HQ, Bewl Water, Bewlbridge Ln, Lamberhurst, Wadhurst TN3 8JH
13 Sep 25
£37.36 - £66.01
4.6
🚀Boosted

Windsor Half Marathon 2025

Windsor, Windsor and Maidenhead
28 Sep 25
£44.00 - £48.00
4.7
🚀Boosted

Whitstable & Herne Bay 1.5k, 5k, 10k & Half Marathon MoRun

Herne Bay, Kent
01 Nov 25
£12.00 - £30.00
5.0
🚀Boosted

RUN Battersea Park Half Marathon

Battersea Park next to the Bandstand - SW11 4NJ
16 Nov 25
£33.11

ATW St Albans Half Marathon #icelollyrun

Verulamium Park, St Albans AL1 2DL
14 Jun 26
£11.66 - £40.28
5.0

Dunstable Downs Half Marathon

Dunstable, Bedfordshire
21 Jun 26
£35.00
4.8

Cock-a-doodle Dawdle - 5k,10k, Half Marathon, Full Marathon or Ultra Marathon

Hyde Hall Farm, Buntingford, SG9 0RU
27 Jun 26
£29.00 - £38.00

RunThrough Marlow Trail Run

Marlow, Buckinghamshire
28 Jun 26
£28.00 - £34.00

Chiltern Ridge Half Marathon

Aylesbury, Buckinghamshire
05 Jul 26
£35.00
4.3

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

Windsor, Berkshire
12 Jul 26
£30.00 - £162.00
4.2

The Railway Run Marathon, Half Marathon & 50km

Milton Keynes, Buckinghamshire
18 Jul 26
£36.99 - £42.99

Formula One Marathons, Half Marathon & 50km

Milton Keynes, Buckinghamshire
19 Jul 26
£36.99 - £42.99

The Rasselbock 545

Oxford, Oxfordshire
25 Jul 26 - 26 Jul 26
£39.50 - £160.00

Maidenhead Trail Run

Maidenhead, Berkshire
26 Jul 26
£28.00 - £34.00

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

Windsor, Berkshire
26 Jul 26
£30.00 - £162.00
4.2

Wind in the Pillows Marathons & Half marathon

Milton Keynes, Buckinghamshire
01 Aug 26
£34.99 - £42.99

Newbury Racecourse Half Marathon, 10k & 5k - August

Newbury, Berkshire
08 Aug 26
£27.00 - £152.00
4.9

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

Windsor, Berkshire
08 Aug 26
£30.00 - £162.00
4.2

Run Dorney Lake Evening Runs 10k & 5k August

Windsor, Berkshire
26 Aug 26
£30.00 - £142.00
5.0

Henley River 10k, Half Marathon & Junior Race September 2026

Henley-on-Thames, Oxfordshire
05 Sep 26
£7.00 - £142.00
4.5

Bewl Water Autumn

Wadhurst, East Sussex
12 Sep 26
£37.36 - £66.01
4.6

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

Windsor, Berkshire
26 Sep 26
£30.00 - £162.00
4.2

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

Windsor, Berkshire
03 Oct 26
£30.00 - £162.00
4.2

Hampton Court Palace Half Marathon Presented by Nuun

East Molesey, Greater London
18 Oct 26
£47.00 - £212.00
4.2

Hertfordshire Half Marathon & 10k

Knebworth, Hertfordshire
01 Nov 26
£40.00 - £212.00
4.5

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

Windsor, Berkshire
08 Nov 26
£30.00 - £162.00
4.2

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

Windsor, Berkshire
12 Dec 26
£30.00 - £162.00
4.2

Zodiac Run

02 Jan 25 - 31 Dec 25
£10.00

Offer

Thanks for booking a Running Bug event through findarace.com - 10% OFF

Andover Trail Marathon & Half

Kings road, Enham Alamien, Andover, SP11 6HP. Post code is for the car park. ​
06 Sep 25
£35.00 - £45.00
4.8

The Shere 42k, Half Marathon & 10k

Shere Recreation Ground, Upper Street, Shere, Surrey, GU5 9JF
06 Sep 25
£27.50 - £80.00
4.5

Richmond Park September 5k, 10k and Half Marathon

London, Greater London
07 Sep 25
£25.00 - £30.00
4.5

RunThrough Wimbledon Common Half Marathon & 10k

London, Greater London
07 Sep 25
£32.00 - £162.00
4.9

The River Run

Shoreham-by-Sea, West Sussex
14 Sep 25
£32.00 - £214.20

Ealing Half Marathon

London, Greater London
28 Sep 25
£55.00

Back to the Future 40th Anniversary Marathons & Half Marathons

Milton Keynes, Buckinghamshire
18 Oct 25 - 19 Oct 25
£38.99 - £44.99

PHOENIX - Pink Flamingo Run

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

River Thames Half Marathon 2025

Walton-on-Thames, Surrey
26 Oct 25
£34.00
4.5

PHOENIX - Butterfly Run

Walton-on-Thames, Surrey
15 Nov 25
£22.00 - £40.00

Salisbury Plain Winter Edition

Old Fowler Barracks, Ludgershall road, Ludgershall, SP11 9RR. ​
06 Dec 25
£37.36 - £53.28
4.4
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