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Half Marathon Calendar South East (England) 2025-2026

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Explore the best half marathons in South East (England) for 2025-2026! Our updated list features 172 exciting races across the region. Find your next race in South East (England) below and join the running community at these great events!

May 2026
May
4
Monday

Saturn Running - Staines-upon-Thames

3 km 7 km ... 42 km 50 km
May
10
Sunday

Run Gatwick Half Marathon

5 km 21 km
May
16-17
Sa - Su

London West Spartan Trifecta Weekend

Obstacle Run 5 km 10 km 21 km
June 2026
Jun
3
Wednesday

Surrey Hills Half Marathon

Trail Run 13 mi
Jun
6-7
Sa - Su

Show Me The Manet

21 km 42 km 50 km
Jun
6
Saturday

Run Dorney Lake Half Marathon

5 km 10 km 21 km
Jun
7
Sunday

Weybridge Half Marathon

5 km 10 km 21 km
Jun
13
Saturday

Bewl Water Summer

Trail Run 10 km 13 mi 26 mi 50 km
Jun
20-21
Sa - Su

Centaur 100 Mile Ultra

Trail Run 21 km 42 km ... 100 mi 24 hr
Jun
20
Saturday

Phoenix - Denbies Marathon & Half Marathon

Trail Run 21 km 42 km
Jun
21
Sunday

Midsummer Munro

Trail Run 13 mi
Jun
28
Sunday

Marlow Trail Run

Trail Run 5 km 10 km 21 km
Jun
28
Sunday

SOX 10km & Half Marathon

10 km 21 km
July 2026
Jul
5
Sunday

Chiltern Ridge Half Marathon

Trail Run 21 km
Jul
12
Sunday

Run Dorney Lake Half Marathon

5 km 10 km 21 km
Jul
18
Saturday

Ciderthon

5 km 13 mi
Jul
18-19
Sa - Su

Railway Run & Formula One

21 km 42 km 50 km
Jul
26
Sunday

Maidenhead Trail Run

Trail Run 5 km 10 km 21 km
Jul
26
Sunday

Run Dorney Lake Half Marathon

5 km 10 km 21 km
August 2026
Aug
1-2
Sa - Su

Wind in the Pillows

21 km 42 km
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