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Half Marathon Calendar South East (England) 2025-2026

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Monthly updates for South East (England)

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Explore the best half marathons in South East (England) for 2025-2026! Our updated list features 215 exciting races across the region. Find your next race in South East (England) below and join the running community at these great events!

December 2025
Dec
24
We

Die Hard Christmas Marathon

Trail Run Half Marathon Marathon
Dec
25
Th

Saturn 7 Hour Time Challenge - Staines-upon-Thames

3 km 7 km ... Marathon 50 km
Dec
25
Th

Saturn Running - Egham

Trail Run 3 km 5 km ... Marathon 50 km
Dec
28
Su

Phoenix - Year End Marathon & Half Marathon

Half Marathon Marathon
Dec
31
We

Phoenix Running - Ardingly

Trail Run 5 km 10 km Half Marathon Marathon
January 2026
Jan
1
Th

Saturn Running - Staines-upon-Thames

3 km 5 km ... Marathon 50 km
Jan
1
Th

Saturn 7 Hour Time Challenge - Staines-upon-Thames

3 km 7 km ... Marathon 50 km
Jan
3-4
Sa - Su

FA Cup Run Marathons

Half Marathon Marathon
Jan
3
Sa

Rhino Run - Wraysbury

Trail Run 5 km 10 km ... Marathon 6 hr
Jan
9
Fr

Saturn 7 Hour Time Challenge - Staines-upon-Thames

3 km 7 km ... 50 km 7 hr
Jan
9
Fr

Saturn Running - Midweek Chasing Numbers

3 km 5 km ... 50 km 7 hr
Jan
9
Fr

Phoenix Fridays

Backyard Ultra 5 km 10 km Half Marathon Marathon
Jan
10
Sa

Saturn Running - Staines-upon-Thames

3 km 5 km ... Marathon 50 km
Jan
11
Su

Winchester Trail Run

Trail Run 12 km Half Marathon
Jan
17
Sa

Phoenix Running - Walton-on-Thames

Trail Run 5 km 10 km Half Marathon Marathon
Jan
18
Su

Run Dorney Lake Marathon

5 km 10 km Half Marathon
Jan
18
Su

Phoenix Running - Southwater

Trail Run 5 km 10 km Half Marathon Marathon
Jan
23
Fr

Phoenix Fridays

Backyard Ultra 5 km 10 km Half Marathon Marathon
Jan
24
Sa

Saturn Running - Staines-upon-Thames

3 km 5 km ... Marathon 50 km
Jan
24
Sa

Running Tribe Races

Trail Run 7 km 10 km ... 30 mi 40 mi