Trail Running calendar near Grafham 2026-2027

Experience a circular cross country route across beautiful undulating Hertfordshire countryside with distances of 18 or 26 miles starting from Baldock.

Experience a scenic trail run through the woods and fields of Trent Country Park with chip timed races for seniors, juniors, and children.

Race two of the 2026 Trifarm trail series, this 10K summer run is over 95% off-road on public paths. Starting near a humpback bridge at Trifarm in Boreham, the anticlockwise course finishes with a lap around the lake.

Complete a full marathon distance over three days with a 5 mile run, an 8.1 mile trail race, and a half marathon. Enjoy a family friendly weekend at the Colworth Club with free camping and onsite facilities.

Experience an intimate trail run at the exclusive Hyde Hall Farm in Hertfordshire with lap based distances ranging from 5k to an Ultra Marathon. Enjoy a supported course with on site parking and a custom finishers medal.

Experience an undulating trail run around the scenic Carsington Water reservoir. Choose between a 10k or half marathon distance and enjoy chip timed results and a bespoke medal in a beautiful countryside setting.

Experience a scenic off-road adventure through the Thames Valley with half marathon, 10k, and 5k trail routes. Enjoy a well-marked countryside course ending with a unique themed medal and professional race photos.

Experience a day of trail running through the scenic woodland of Salcey Forest with four distance options ranging from 10km to 50km and generous cut off times.

Looped races at Chasewater Country Park offer 5K laps for options from 5K up to a full marathon, a relatively flat mixed-surface course with park facilities and aid stations, and a finisher medal and occasional snack.

Experience a scenic 10km mixed terrain run through the trails and woodland of Hatfield. Starting and finishing at the 3 Brewers Brewery, participants enjoy chip timing and a complimentary drink at the finish line.

The Midsummer Munro is a half marathon held at Box Hill Fort in Surrey. The event takes place in late June. Runners can register online until the day of the race.

Enjoy a 5k fun run or walk through the trails of Therfield Heath to support the Teenage Cancer Trust. This family friendly event features a scenic two lap grass course for up to 700 participants.

Experience a historic trail run through the scenic Ashridge Woods on this five mile course. Enjoy a marshalled off road route starting and finishing at the Aldbury Recreation Ground with refreshments provided at the finish.

Run the full 82 mile Essex Way from Epping tube to Harwich lighthouse over challenging trails and country lanes. Enjoy supported checkpoints, GPS tracking and a 24 hour finish window for an epic route across Essex.

Experience a unique point to point half marathon along scenic canal towpaths from Wolverhampton to Birmingham. Run through the historic Coseley Tunnel and refuel at floating canal barge aid stations before finishing in Brindley Place.

Choose your own challenge at the Summer Sun Run, a flexible lap event set in the scenic Denbies Wine Estate. Complete as many 5.3 km laps as you like within 7 hours, with a large medal for all finishers. Enjoy a flexible start window and a..

The Fen Gallop features flat 10k and 4-mile multi-terrain races on country paths around Willingham. Both events start and finish at the recreation ground. A chipped timing system is used for all participants.

A scenic half marathon on the historic Ridgeway National Trail in Buckinghamshire. The hilly, fully-marked trail route connects Wendover and Princes Risborough, passing through the Whiteleaf Hill Nature Reserve.

Join this community fundraising event featuring chip timed races on traffic free roads through East Hertfordshire. Choose between road races or a children's run while supporting new local sports facilities.

Experience a summer trail race through the hilly forest paths of Cannock Chase. Choose between a half marathon or 10k and enjoy free parking, race photos, and a bespoke finisher medal.