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Marathon Calendar South East (England) 2025-2026

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Explore the best marathons in South East (England) for 2025-2026! Our updated list features 83 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

BigWayRound - Winchester

Trail Run 14 mi 19 mi Marathon 50 km
May
4
Monday

Saturn Running - Staines-upon-Thames

3 km 7 km ... Marathon 50 km
May
16
Saturday

Saturn Running - Staines-upon-Thames

3 km 7 km ... Marathon 50 km
May
16
Saturday

Saturn 7 Hour Time Challenge - Staines-upon-Thames

3 km 7 km ... Marathon 50 km
May
23-24
Sa - Su

London 2 Brighton Ultra Challenge

Trail Run 25 km 33 km ... 75 km 100 km
May
29
Friday

Saturn Running - Midweek Medal Madness Run

3 km 5 km ... Marathon 50 km
June 2026
Jun
5
Friday

Saturn Running - Midweek Chasing Numbers

3 km 7 km ... Marathon 50 km
Jun
6-7
Sa - Su

Show Me The Manet

Half Marathon Marathon 50 km
Jun
7
Sunday

Saturn Running - Staines-upon-Thames

3 km 4 mi ... Marathon 50 km
Jun
7
Sunday

Saturn 7 Hour Time Challenge - Staines-upon-Thames

3 km 7 km ... Marathon 50 km
Jun
13
Saturday

Bewl Water Summer

Trail Run 10 km 13 mi 26 mi 50 km
Jun
14
Sunday

The Hampshire Hoppit

Trail Run 10 km Half Marathon Marathon
Jun
14
Sunday

Saturn Running - Staines-upon-Thames

3 km 7 km ... Marathon 50 km
Jun
20
Saturday

Three Shires Way Ultra & Marathon

Trail Run 26 mi 50 mi
Jun
20-21
Sa - Su

Centaur 100 Mile Ultra

Trail Run Half Marathon Marathon ... 100 mi 24 hr
Jun
20
Saturday

Phoenix - Denbies Marathon & Half Marathon

Trail Run Half Marathon Marathon
July 2026
Jul
3
Friday

Saturn 7 Hour Time Challenge - Wraysbury

Trail Run 3 km 7 km ... 50 km 7 hr
Jul
5
Sunday

Saturn 7 Hour Time Challenge - Staines-upon-Thames

3 km 5 km ... Marathon 50 km
Jul
18-19
Sa - Su

Railway Run & Formula One

Half Marathon Marathon 50 km
Jul
19
Sunday

BigHeat Trails (FIRE)

Trail Run 16 mi Marathon
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