Bewl Water Autumn

SEP
12
2026
Enjoy scenic reservoir trail running at Bewl Water near Lamberhurst, Kent, with lake views, undulating woodland and quiet lanes. Choose from 10K, half, marathon or 50K ultra on a Runners World top 10 UK marathon course.
50 kilometers 26 miles 13 miles 10 kilometers

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Event

Bewl Water is a bi-annual race series organised by Hermes Running near the Bewl Water Visitor Centre in Lamberhurst, Kent. The routes follow the reservoir and use a mix of undulating rural wooded trail and some quiet country lanes. Runners have lake views for most of the route. Runners World has rated this course as one of the top 10 marathons in the U.K.

Distances

  • 10 km
  • Half Marathon (13.1 miles)
  • Marathon (slightly longer than 26.2 miles)
  • Ultra 50 km (31.25 miles)

Course format and measurement

The 10 km is an out-and-back route of about 3.1 miles with a well marshalled turnaround and a 2.5 hour time limit. The half marathon starts with an initial 0.6 mile anti-clockwise loop, then one 12.5 mile loop of the reservoir (6 hour time limit). The marathon includes an initial 1 mile loop followed by two 12.5 mile loops of the reservoir; organisers note the marathon is slightly longer than standard marathon distance and there is a 7 hour 9 minute limit quoted on event pages. The 50 km ultra uses two 12.5 mile loops followed by a final 6.25 mile loop (8 hour time limit). Distances were measured using a Garmin Fenix 6X Pro-Solar watch and the organisers note trail line can cause small variations in distance. Visit the organization's website for the most recent information.

50 km
Bewl Water Ultra 50km
26 mi
Bewl Water Marathon
13 mi
Bewl Water Half Marathon
10 km
Bewl Water 10km