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Trail Running Calendar near Harrow 2025-2026

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Explore the top trail runs near Harrow for 2025-2026! We've gathered 112 exciting races in the area. Check out our detailed list below to find your next local race.

May 2026
May
2
Saturday

Centurion Thames Path 100

Trail Run 100 mi
May
2
Saturday

Greensand Way Ultra Run

Trail Run 30 mi
May
3
Sunday

Rapid Relays

Trail Run 5 km 10 km
May
3
Sunday

Box Hill Vertical KM

Trail Run 13 mi
May
9
Saturday

Chiltern Hills 100K

Trail Run 100 km
May
10
Sunday

The Greenway Challenge

Trail Run 13 mi
May
17
Sunday

Reigate Priory Park 10K Charity Fun Run

Trail Run 10 km
May
23
Saturday

The Fox Trail

Trail Run 20 km 41 km 62 km
May
24
Sunday

Richmond Park Marathon

Trail Run 26 mi
May
30
Saturday

Beat the Sunset 50km

Trail Run 50 km
May
30
Saturday

The Ridgeway Challenge

Trail Run 86 mi
June 2026
Jun
3
Wednesday

Surrey Hills Half Marathon

Trail Run 13 mi
Jun
5
Friday

Saturn 7 Hour Time Challenge - Wraysbury

Trail Run 3 km 3 mi 7 km
Jun
10
Wednesday

Chase the Sun Clapham 10k

Trail Run 5 km 10 km
Jun
14
Sunday

Wendover Woods Half Marathon

Trail Run 10 km Half Marathon
Jun
14
Sunday

3 Brewers 10km

Trail Run 10 km
Jun
20
Saturday

Beyond Trails London

Trail Run 26 km 55 km
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
Jun
21
Sunday

Dunstable Downs Half Marathon

Trail Run Half Marathon
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