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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

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RUN Battersea Park Half Marathon

Battersea Park next to the Bandstand - SW11 4NJ
Sun 16 Nov 25
£35.24

Maidenhead Trail Run

Maidenhead, Berkshire
Sun 26 Jul 26
£28.00 - £36.00

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

Windsor, Berkshire
Sun 26 Jul 26
£30.00 - £162.00
4.3

Wind in the Pillows Marathons & Half marathon

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

Midweek Chasing Numbers Aug 2026

Wraysbury Skiff and Punting Club, Riverside, Egham TW20 0AA
Fri 07 Aug 26
£18.00 - £27.00
5.0

PHOENIX - The Painted Cow Run

Dorking, Surrey
Sat 08 Aug 26
£22.00 - £39.95
5.0

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

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

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

Windsor, Berkshire
Sat 08 Aug 26
£30.00 - £162.00
4.3

PHOENIX - Prosecco Run

Dorking, Surrey
Sun 09 Aug 26
£22.00 - £39.95
5.0

Lee Valley Velo Park - August

London, Greater London
Sat 15 Aug 26
£12.00 - £34.00
4.6

Run Dorney Lake Evening Runs 10k & 5k August

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

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

Henley-on-Thames, Oxfordshire
Sat 05 Sep 26
£7.00 - £142.00
4.6

PHOENIX - Summer Marathon & Half Marathon

Walton-on-Thames, Surrey
Sat 05 Sep 26
£33.50
5.0

Bewl Water Autumn

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

Flying Scotsman Marathons & Half Marathons

Milton Keynes, Buckinghamshire
Sat 12 Sep 26 - Sun 13 Sep 26
£34.99 - £41.99

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

Windsor, Berkshire
Sat 26 Sep 26
£30.00 - £162.00
4.3

Ealing Half Marathon 2026

London
Sun 27 Sep 26
£42.11 - £44.21

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

Windsor, Berkshire
Sat 03 Oct 26
£30.00 - £162.00
4.3

Hampton Court Palace Half Marathon Presented by Nuun

East Molesey, Greater London
Sun 11 Oct 26
£47.00 - £212.00
4.2

Lee Valley Velo Park - October

London, Greater London
Sat 24 Oct 26
£12.00 - £34.00
4.6

Hertfordshire Half Marathon & 10k

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

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

Windsor, Berkshire
Sun 08 Nov 26
£30.00 - £162.00
4.3

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

Windsor, Berkshire
Sat 12 Dec 26
£30.00 - £162.00
4.3

Lee Valley Velo Park - December

London, Greater London
Sat 19 Dec 26
£12.00 - £142.00
4.6

Zodiac Run

Thu 02 Jan 25 - Wed 31 Dec 25
£10.00

Offer

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PHOENIX - Pink Flamingo Run

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

Epping Forest Wildwood Trail Series Half Marathon & 10K

London
Sat 25 Oct 25
£27.00 - £37.00

River Thames Half Marathon 2025

Walton-on-Thames, Surrey
Sun 26 Oct 25
£39.00
4.5

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

Herne Bay, Kent
Sat 01 Nov 25
£15.00 - £35.00
5.0

Enigma Fireworks Marathons & Half Marathons

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

RUN DORNEY 5K, 10K & HALF MARATHON

Windsor, Berkshire
Sun 09 Nov 25
£30.00 - £142.00
4.3

PHOENIX - Butterfly Run

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

The Wallop

Farleigh House, Basingstoke, RG25 2HT
Sat 29 Nov 25
£40.00

WITTERING BEACH RUN

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

Gremlins Christmas Half & Marathons

Milton Keynes, Buckinghamshire
Fri 05 Dec 25 - Sat 06 Dec 25
£36.99 - £44.99

Salisbury Plain Winter Edition

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

Die Hard Christmas Jumpers Marathon & Half Marathon

Milton Keynes, Buckinghamshire
Wed 24 Dec 25
£39.99 - £44.99

Worthing Runfest Half Marathon & 10K 2026

Worthing, West Sussex
Sun 03 May 26
£35.50 - £40.50
4.8
Showing 201-237 of 237 results
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