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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 128 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
17
Su

Phoenix Running - Ewhurst
Trail Run 5 km 10 km Half Marathon Marathon
May
23-24
Sa - Su

London 2 Brighton Ultra Challenge
Trail Run 25 km 33 km ... 75 km 100 km
May
29
Fr

Saturn Running - Midweek Chasing Numbers
3 km 5 km ... 50 km 7 hr
June 2026
Jun
5
Fr

Saturn Running - Midweek Chasing Numbers
3 km 5 km ... 50 km 7 hr
Jun
6-7
Sa - Su

Show Me The Manet
Half Marathon Marathon 50 km
Jun
7
Su

Saturn Running - Staines-upon-Thames
3 km 5 km ... 50 km 7 hr
Jun
7
Su

Saturn 7 Hour Time Challenge - Staines-upon-Thames
3 km 7 km ... Marathon 50 km
Jun
13
Sa

Bewl Water Summer
Trail Run 10 km 13 mi 26 mi 50 km
Jun
14
Su

The Hampshire Hoppit
Trail Run 10 km Half Marathon Marathon
Jun
14
Su

Saturn Running - Staines-upon-Thames
3 km 5 km ... Marathon 50 km
Jun
20
Sa

Three Shires Way Ultra & Marathon
Trail Run 26 mi 50 mi
Jun
20
Sa

Centaur 100 Mile Ultra
Trail Run 13 mi 26 mi ... 100 mi 24 hr
Jun
20
Sa

Denbies Marathon & Half Marathon
Trail Run Half Marathon Marathon
Jun
20
Sa

Hydra 75 Mile Ultra
Trail Run 13 mi 26 mi ... 100 mi 24 hr
July 2026
Jul
3
Fr

Saturn Running - Midweek Chasing Numbers
3 km 5 km ... 50 km 7 hr
Jul
3
Fr

Saturn 7 Hour Time Challenge - Wraysbury
Trail Run 3 km 7 km ... 50 km 7 hr
Jul
5
Su

Saturn 7 Hour Time Challenge - Staines-upon-Thames
3 km 5 km ... Marathon 50 km
Jul
5
Su

Saturn Running - Staines-upon-Thames
3 km 5 km ... Marathon 50 km
Jul
18-19
Sa - Su

BigHeat Trails (FIRE)
Trail Run 12 km 16 mi Marathon 50 km
Jul
18-19
Sa - Su

Railway Run & Formula One
Half Marathon Marathon 50 km