Grafham Water Trail Races

Grafham Water Trail Races

Grafham Water Trail Races on Sunday 11th October 2026 are fully marked and marshalled trail races held at Marlow Park, Grafham Water, Huntingdon, Cambridgeshire. The event offers two distances over natural trails and tracks around the reservoir with countryside views.

• 10k course on trails around Grafham Water, looping back onto the outward track.
• Half Marathon larger lap of the reservoir using sections of the Three Shires Way.

Entries will be priced at £25 for the 10k and £30 for the half marathon. Minimum ages are 16 for the 10k and 17 for the half marathon. The race cut off time is four hours for both distances. Entries and transfers close seven days before the event. Dogs are not permitted on the routes.

Both routes are fully waymarked and GPX files are available for download. No in-ear headphones are allowed; bone conduction devices that do not sit in the ear are permitted. There will be professional first aid cover with access to the course. Hydration is provided by volunteers at three water stations on the half marathon and one on the 10k, with water also at the finish.

Mandatory items include a fully charged mobile phone and a personal cup as races are cupless. Trail shoes or shoes with grip are recommended. Prizes are awarded to the top three male and female finishers in each race and all finishers receive a race medal. Race merchandise can be pre-ordered before the event and free digital race photos will be available after the event. Parking is available at Marlow Park and parking fees apply. The event supports two local foodbanks, with entrants offered an opportunity to donate. Visit the organization's website for the most recent information.