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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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Race Calendar: Half Marathons In the South East

🚀Boosted

Folkestone Rotary Half Marathon

The Grand, The Leas, Folkestone, Kent,CT20 2XL
28 Sep 25
£4.56 - £32.74
4.0
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Windsor Half Marathon 2025

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

Run Bournemouth

Bournemouth, Dorset
11 Oct 25 - 12 Oct 25
£15.00 - £44.75
4.5
🚀Boosted

THAMES PATH TRAIL RUN

Windsor, Berkshire
26 Oct 25
£35.00 - £40.00

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

Maidenhead Trail Run

Maidenhead, Berkshire
26 Jul 26
£28.00 - £34.00

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

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

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
£36.00 - £192.00
4.5

Zodiac Run

02 Jan 25 - 31 Dec 25
£10.00

Offer

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

Ciderthon: Half Marathon & 5K

Henley-on-Thames, Hambleden, Buckinghamshire
19 Jul 25
£30.00 - £47.00

Run Whitstable & Herne Bay Summer 5k, 10k and half marathon

Herne Bay, Kent
19 Jul 25
£12.00 - £30.00

Richmond Park July 5k,10k and Half Marathon

London, Greater London
20 Jul 25
£25.00 - £30.00
4.4

The ONE British PB 5k,10k and Half Marathon Run

Guildford, Surrey
26 Jul 25
£25.00 - £35.00

Football League Original 12 Run

Milton Keynes, Buckinghamshire
02 Aug 25 - 03 Aug 25
£36.99 - £42.99

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 River Run

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

Kingston Half Marathon 2025

Kingston upon Thames, Greater London
05 Oct 25
£39.50
5.0

Run the Wild Half Marathon - Autumn

Tring, Hertfordshire
11 Oct 25
£55.00
5.0

Back to the Future 40th Anniversary Marathons & Half Marathons

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

River Thames Half Marathon 2025

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

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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