Nestled within the picturesque Cambridgeshire countryside, Grafham Water offers runners an enchanting trail experience with its 10K and Half Marathon races. These events take place around Marlow Park, where participants are greeted by stunning views of the reservoir and lush greenery. The race day starts early at Marlow Park, with registration opening at 7:00 AM for all competitors to collect their essential gear including timing chips and pre-ordered t-shirts. The Half Marathon begins promptly at 9:00 AM followed closely by the 10K starting at 9:15 AM. Both races are meticulously planned to showcase the beauty of Grafham Water's trails and tracks, winding through farmland and along scenic paths that offer glimpses into the natural landscape. While the shorter route loops back around after a brief exploration westward towards Easton, the Half Marathon continues further, circling extensively around the reservoir before returning. The courses are clearly marked with directional arrows to guide runners through their journey. However, participants must ensure they have fully charged mobile phones for safety and communication purposes, especially those tackling the half marathon who should also carry numbers of key contacts like race officials in case of emergencies. Hydration is a priority on these routes, where water stations will be strategically placed along both courses to keep runners refreshed as they push their limits. Professional first aid teams are positioned at crucial points throughout the event and across finish lines for immediate assistance if needed. For those looking ahead, it's advisable to wear trail shoes or footwear with substantial grip given the terrain’s challenges. Additionally, consider packing a waterproof jacket, long-sleeved base layer, hat, and gloves depending on weather forecasts to ensure comfort during the run. Upon crossing the finish line, all participants will be rewarded not only by their personal achievements but also with specially designed race medals celebrating this unique event. Top male and female runners in each category (10K and Half Marathon) can look forward to additional prizes as well. Supporters are encouraged to cheer from designated areas around Grafham Water’s tracks rather than attempting to park within the villages that the half marathon route passes through, ensuring a smooth flow of support without disrupting local communities. As an added perk for race day participants, free digital photos will be made available shortly after the event concludes via social media platforms. These races also serve as a platform to raise funds and awareness for vital causes like the Jubilee Foodbank in Market Harborough and Weston Favell Centre Foodbank in Northampton, allowing runners to contribute positively beyond their athletic pursuits. For more information about this race or upcoming events organized by Race Harborough, follow them on Facebook where updates are regularly posted. With no established course records yet for either distance, there's a unique opportunity for ambitious athletes looking to make history at Grafham Water’s trails.
Races Offered
10k 2026
Oct 11, 2026
straighten
Distance —
10K
terrain
Type —
Running
timer
64 days remaining
sell
£25.00
Half Marathon 2026
Oct 11, 2026
straighten
Distance —
21.1K
terrain
Type —
Running
timer
64 days remaining
sell
£30.00
Weather History
These values represent the 3-year monthly averages for October in Huntingdon.
thermostatTemperature
9.1° / 15.4°
wb_sunnyFeels like
5.8° / 12.5°
light_mode
Avg sunshine hours
5h 38m
water_drop
Avg rainfall
2.5 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
15.3 km/h (Gentle breeze)
opacity
Sweat loss rate
Low
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Low (2.8)
humidity_mid
Humidity
82.8%
wb_twilight
Sunrise
07:27
nightlight
Sunset
18:04
About Huntingdon
Learn more about the host city, Huntingdon.
Huntingdon is a sleepy historic town in Cambridgeshire, England, on the banks of the River Ouse, best known as the birthplace of English Civil War leader Oliver Cromwell.