Bewl Water Summer

Lamberhurst, United Kingdom • 13 Jun 2026

Trail Running at Bewl Water

The Bewl Water Summer event features a series of trail races held at the largest lake in South East England. Located near Lamberhurst, Kent, the routes traverse 1,000 acres of countryside within the Kent and Sussex border. Participants run through forested areas and open countryside, with the majority of the course offering views of the reservoir.

The event offers four distinct distances:

  • 50 km Ultra Marathon
  • 26.2 mile Marathon
  • 13.1 mile Half Marathon
  • 10 km Run

All routes are primarily off-road, utilizing a combination of undulating rural wooded trails and quiet country lanes. The courses follow a clockwise direction around the reservoir, starting and finishing at the main Bewl Water Visitor Centre. Specific loop configurations vary by distance; for example, the 50 km involves two 12.4-mile loops followed by a final shorter loop, while the 10 km is an out-and-back route with a marshalled turnaround point.

The event provides professional chip timing, and provisional results are uploaded after the race. The course includes well-marked routes and stocked checkpoints maintained by marshals. Participants receive a bespoke race medal upon completion, and slate awards are presented to the top three male and female finishers in each category. Professional medical support and photography services are present on-site. The marathon distance has previously been recognized by Runners World as a top UK marathon. Visit the organization's website for the most recent information.

Race information

50 km
Bewl Water Ultra Marathon
26 mi
Bewl Water Marathon
13 mi
Bewl Water Half Marathon
10 km
Bewl Water 10km
Visit the organization's website for the most recent information.
Trail runs nearby

A three day series across East Grinstead, Haywards Heath and Burgess Hill offering 10 mile, 10k, mile and fun run distances plus combined marathon and virtual options.

Test your endurance at Stanmer Park by completing 4.167 miles every hour until only one runner remains. This out and back course offers a personal challenge with support facilities and refreshments for all participants.

Experience the twilight beauty of Ardingly Reservoir during this evening run in West Sussex. Choose between a 5K or 10K distance on an undulating trail course featuring scenic water views and a finisher medal.

Off-road 10k, 5k and junior runs at Milton Creek Country Park on 10 May 2026. The event supports the Oliver Fisher Special Care Baby Trust and includes medals, prizes, pacers and limited free on-site parking.

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