Grafham Water Trail Races

OCT
11
2026
Trail races at Grafham Water offering marked 10k and half marathon routes around the reservoir with water stations, prizes and free digital race photos.
Sun 11 Oct 2026
Half Marathon 10 kilometers

Always double-check with the organizer's website! This page may contain affiliate links.

Grafham Water Trail Races

Grafham Water Trail Races are trail events held at Marlow Park, Grafham Water, Huntingdon, Cambridgeshire. The event offers two measured distances:

  • 10k
  • Half Marathon

Both routes are fully marked and marshalled and follow trails and sections of the Three Shires Way. The 10k returns to the outward track while the half marathon includes a large lap of the reservoir. GPX files are available for both routes. The courses use footpaths across farmland and running with dogs is not permitted.

Race Harborough provides on-course support including professional first aid at the start and finish with access to runners on course, and volunteers supplying hydration: three water stations on the half marathon and one on the 10k, with water also available at the finish. No in-ear headphones are allowed; bone conduction headphones that do not sit in the ears are permitted.

Entries are open and priced at £25 for the 10k and £30 for the half marathon. Minimum ages on race day are 16 for the 10k and 17 for the half marathon. The race cut off time is four hours for both races. Entries and transfers close seven days before the event. Parking is available at Marlow Park and parking fees apply.

Mandatory items include a fully charged mobile phone and a personal cup, as the races are cupless. Trail shoes or shoes with grip are advisable. Prizes will be awarded to the top three male and female finishers in both races and all finishers will receive a race medal. Free digital race photos will be available after the event. Selected race merchandise can be pre-ordered up to three weeks before the event; no merchandise will be sold on race day. Visit the organization's website for the most recent information.

Half Marathon
Half Marathon
10 km
10k

Events nearby

A backyard ultra at Turvey House where runners complete a 4.167 mile (6.7 km) loop each hour; failing to start a loop on the hour means elimination. Entries include solo, paired teams alternating loops, and an 8 hour day cap.
Timed, lapped run at Old Warden on 16 October 2026 with flexible start times, distances from one 3.28 mile lap to ultras and a seven hour limit.
A lap-based timed run at Old Warden on a flat 5.3 km course with flexible distances, a 7 hour limit, and a no-medal lower cost option.
A lap-based timed charity run in St Neots on a 5.3 km out and back course, held in partnership with a local school and the charity KiSS. Multiple distance options are available and Phoenix Running will donate five pounds from each entry to support Ki..
Add Event
Help us complete the calendar!
  • Distance is at least 5 km
  • Event has a website or Facebook page
Website
Optional: Please provide your e-mail address if we may contact you.
Report a change
We will only update the data if the information is also on the website.