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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 85 exciting races across the region. Find your next race in South East (England) below and join the running community at these great events!

February 2026
Feb
21
Saturday

Saturn 7 Hour Time Challenge

3 km 7 km ... 42 km 50 km
Feb
21
Saturday

Saturn Running - Staines-upon-Thames

3 km 7 km ... 42 km 50 km
Feb
21
Saturday

Magna Carta Winter

10 km 21 km 42 km
Feb
22
Sunday

BigMud Trails (EARTH)

Trail Run 16 mi 26 mi
March 2026
Mar
1
Sunday

Saturn Running - Staines-upon-Thames

3 km 7 km ... 42 km 50 km
Mar
6
Friday

Saturn 7 Hour Time Challenge

3 km 7 km ... 50 km 7 hr
Mar
7
Saturday

Endurancelife | Sussex

Trail Run 6 mi 13 mi 26 mi 33 mi
Mar
9-15
Mo - Su

Enigma Week at the Knees

26 mi
Mar
14
Saturday

Saturn Running - Staines-upon-Thames

3 km 7 km ... 42 km 50 km
Mar
14
Saturday

Saturn 7 Hour Time Challenge

3 km 7 km ... 42 km 50 km
Mar
21
Saturday

Winter's End - 50 Mile Ultra & Marathon

Trail Run 42 km 50 mi
Mar
21
Saturday

Saturn Running - Staines-upon-Thames

3 km 7 km ... 42 km 50 km
Mar
21
Saturday

Saturn 7 Hour Time Challenge

3 km 7 km ... 42 km 50 km
April 2026
Apr
2
Thursday

Saturn Running - Staines-upon-Thames

3 km 7 km ... 42 km 50 km
Apr
3-4
Fr - Sa

The Enigma Easter Series

21 km 42 km
Apr
11-12
Sa - Su

Brighton Marathon Weekend

10 km 42 km
Apr
19
Sunday

Kent Spring Marathon & Half Marathon

21 km 42 km
May 2026
May
3
Sunday

MK Marathon Weekend

5 km 21 km 42 km
May
4
Monday

BigWayRound - Winchester

Trail Run 14 mi 19 mi 42 km 50 km
May
23-24
Sa - Su

London 2 Brighton Ultra Challenge

Trail Run 25 km 33 km ... 75 km 100 km
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