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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

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

Henley River 10k & Half Marathon

Henley-on-Thames, Oxfordshire
30 Aug 25
£30.00 - £142.00
4.5

ATW Bedford Running Festival

Russell Park, The Embankment, Bedford MK40 3RH
06 Sep 25 - 07 Sep 25
£12.72 - £42.40

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

RunThrough Wimbledon Common Half Marathon & 10k

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

Richmond Park September 5k, 10k and Half Marathon

London, Greater London
07 Sep 25
£22.00 - £25.00
4.4

Run2Paris September 2025

London
10 Sep 25 - 14 Sep 25
£950.00

Coronation Scot Marathons & Half Marathon

Milton Keynes, Buckinghamshire
13 Sep 25 - 14 Sep 25
£34.99 - £42.99

Bewl Water Autumn

Wadhurst
13 Sep 25
£37.36 - £66.01
4.5

PHOENIX - Dragon's Eye Race 2

Cranleigh, Surrey
14 Sep 25
£27.00 - £40.00
5.0

Richmond Half Marathon @ Richmond RUNFEST

Richmond, Greater London
14 Sep 25
£35.00
5.0

The River Run

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

Richmond Park Half Marathon

London
21 Sep 25
£42.00 - £182.00
4.4

Winchester Half Marathon

Winchester City Centre
21 Sep 25
£10.82 - £40.53
5.0

RUN DORNEY 5K, 10K & HALF MARATHON

Windsor, Berkshire
27 Sep 25
£30.00 - £162.00
4.2

ATW Welwyn Half Marathon & 10k

Gosling Sports Park, Stanborough Road, Welwyn Garden City, Hertfordshire, AL8 6XE
28 Sep 25
£30.74 - £39.22

The One on the Trail - Marlow

Marlow
28 Sep 25
£10.00 - £35.00

Folkestone Rotary Half Marathon

The Grand, The Leas, Folkestone, Kent,CT20 2XL
28 Sep 25
£4.56 - £27.48
4.0

Ealing Half Marathon

London, Greater London
28 Sep 25
£48.00

Hever Castle Run Series

Edenbridge, Kent
28 Sep 25
£35.00 - £65.00
4.2

Offer

10% OFF

Street Child - Craft Half

London
28 Sep 25
£40.00

Windsor Half Marathon 2025

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

VICTORIA PARK 5K, 10K & HALF MARATHON

London
04 Oct 25
£28.00 - £152.00
4.7

RUN DORNEY 5K, 10K & HALF MARATHON

Windsor, Berkshire
04 Oct 25
£30.00 - £162.00
4.2

RUN KENT HALF MARATHON, 10K & 5K

Tonbridge, Kent
05 Oct 25
£26.00 - £162.00
5.0

Thames Meander Autumn

Petersham & Ham Sea Scouts HQ, Douglas House Meadow, Richmond, TW10 7AH
05 Oct 25
£37.36 - £58.59
4.5

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
£50.00
5.0

PHOENIX - King of the Rungle

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

The Richmond Autumn Riverside 10k and Half Marathon Run

Richmond, Greater London
12 Oct 25
£22.00 - £25.00
4.6

Richmond Park Half Marathon

London
12 Oct 25
£42.00 - £182.00
4.4

Chelmsford Marathon & Half Marathon

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

Back to the Future 40th Anniversary Marathons & Half Marathons

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

Running GP at Goodwood Motor Circuit October

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

Bedgebury Forest Half Marathon & 10K

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

Henley Half Marathon

Henley-on-Thames, Oxfordshire
19 Oct 25
£10.00 - £40.00
4.8

Richmond Park October 5k, 10k and Half Marathon

London
19 Oct 25
£22.00 - £25.00
4.4

Epping Forest Wildwood Trail Series Half Marathon & 10K

London
25 Oct 25
£22.00 - £32.00

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

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

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
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