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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!

April 2026
Apr
3
Fr

Saturn 7 Hour Time Challenge - Wraysbury
Trail Run 3 km 7 km ... Marathon 50 km
Apr
5
Su

Phoenix Running - Walton-on-Thames
Trail Run 5 km 10 km Half Marathon Marathon
Apr
11-12
Sa - Su

Brighton Marathon Weekend
10 km 26 mi
Apr
11
Sa

Saturn Running - Staines-upon-Thames
3 km 5 km ... Marathon 50 km
Apr
12
Su

The Maverick Brighton Trail Marathon
Trail Run Marathon
Apr
17
Fr

Saturn Running - Midweek Chasing Numbers
3 km 5 km ... Marathon 50 km
Apr
17
Fr

Phoenix Fridays
Backyard Ultra 5 km 10 km Half Marathon Marathon
Apr
18
Sa

Saturn Running - Staines-upon-Thames
3 km 5 km ... Marathon 50 km
Apr
19
Su

Kent Spring Marathon & Half Marathon
Half Marathon Marathon
Apr
26
Su

Phoenix Running - Walton-on-Thames
Trail Run 3 mi 13 mi 26 mi
May 2026
May
1
Fr

Saturn Running - Midweek Chasing Numbers
3 km 5 km ... 50 km 7 hr
May
1
Fr

Saturn 7 Hour Time Challenge - Wraysbury
Trail Run 3 km 7 km ... Marathon 50 km
May
2-4
Sa - Mo

Mid Sussex Marathon Weekend
Trail Run 3 mi 10 km 10 mi 26 mi
May
3
Su

Three Forts Challenge
Trail Run 5 mi Half Marathon Marathon
May
3
Su

MK Marathon Weekend
5 km Half Marathon Marathon
May
3
Su

Southampton Marathon
5 km 10 km Half Marathon Marathon
May
4
Mo

BigWayRound - Winchester
Trail Run 14 mi 19 mi Marathon 50 km
May
4
Mo

Saturn Running - Staines-upon-Thames
3 km 5 km ... 50 km 7 hr
May
16
Sa

Saturn Running - Staines-upon-Thames
3 km 5 km ... Marathon 50 km
May
16
Sa

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