Trail Running calendar near Hertfordshire 2026-2027
We have found 562 Trailruns within 80 miles of Hertfordshire. See below where and when you can find the races.
0 – 100∞ km
Articles
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A riverside trail event at Remenham Farm in Henley-on-Thames offering a Half Marathon, 10K and a Junior Race for under 11s, with chip timing, medals, free photos and an event village.
October 2027
A 100 kilometre trail ultramarathon on 9 May 2026 around the Chiltern Hills, following an anticlockwise loop past Ashridge, The Ridgeway and Whiteleaf Hill. Fully marked route with GPS tracking and several staffed aid stations.