Trail Running calendar near Grantchester 2026-2027

A 50km trail ultramarathon through the Chilterns centered at Stonor Park, run as two 25km loops with 4000 ft of climb, five aid stations and full medical support. The event has a nine hour finish limit and medals for all finishers.

Looped 7K and 10K courses in Chalfont St Peter and Gerrards Cross let runners choose distances from a single loop to ultramarathon. Aid stations, marked routes, crew access and medical support are provided, with prizes for top finishers in..

An ultramarathon event in London’s Lea Valley on 20 March 2027, organised by Camino Ultra. The listing gives the location as London E15 2HB.

A PARAS'10 event in Friday Woods featuring a 3 mile loop with one to three laps, categories for runners, TAB entrants and canicross. A 2 mile junior race is available for ages 10 to 15.

A guided trail half marathon around the Surrey Hills, about 13 miles from St Martha's Hill in Guildford, following parts of the North Downs Way and notable viewpoints. The run is social in format with a guided pace and evening options.

A looped trail event at High Lodge Thetford Forest offering distances from 5k to ultra marathon, lap-based formats, on course aid at the lap point, medal options and refreshments at Oak Lodge. Part of entry fees support forest upkeep.

Seven consecutive days of timed running on certified out and back routes along the River Thames in Walton on Thames. Distances from 5 km to ultra are available and finishers earn daily mementos plus a seven day lantern medal set.

A two lap multi terrain 10 km trail race on Easter Monday around Mortimer Fairground and local woodlands, with a canicross option, chip timing, medal and free race photos. The undulating course is not suitable for pushchairs or wheelchairs.

A night running challenge at Hyde Hall Farm offering twelve hour or six hour shifts under the stars. Head torches are required and hot drinks plus an aid station are provided with a medal for every finisher.

A circular Half Marathon through Thetford Forest on mixed hard-packed and grassy trails, manually timed and traffic free. The event is cupless, offers optional eco friendly medals and podium trophies, and has a 3.5 hour cut-off.

Scenic mixed terrain races along the Thames at Remenham Farm in Henley on Thames. Options include a Half Marathon, a 10K and a Junior Race with marked trails, marshals, chip timing and post race goodies.

A 54 mile circular ultra and a 26.2 mile marathon from Brixworth Country Park through Northamptonshire trails, canal towpath and roads, with checkpoints, GeoTracks real time tracking and an over 18 age limit.

Inflatable 5K in Huntingdon on Saturday 10 April 2027 is an untimed inflatable obstacle course with music zones, finisher medals and food vendors; choose from 2.5k, 5k, 10k or 15k options with on-course water and toilets.

The Rosebud Marathon covers 26.2 miles of Northamptonshire trails, roads and canal towpath, starting near Hartwell and finishing at Brixworth Country Park. The single line course includes two staffed checkpoints and live GPS tracking for co..

A 28 mile out and back along the traffic free Brampton Valley Way, run as a county versus county contest with 100 starters from each end. The route is flat, includes two long dark tunnels, four feed stations and on course first aid.

A running festival at Haughley Park, Suffolk with looped courses through pathways and woodland, onsite parking, lap aid station and bespoke finisher medals. Distances range from 5k to ultra marathon.

Forest trail runs at High Lodge in Thetford Forest on 11 April 2027 with 5 km, 10 km and a new half marathon options. The chip timed event is fully supported and all finishers receive a medal, merchandise, snack and drink.

A 50K trail ultra on the Chiltern Hills ridgeline from Berkhamsted Castle to Hampden Meadow, passing Ashridge and Ivinghoe Beacon. Fully marked course with three aid stations and a nine hour time limit.

Windsor 50 offers looped 50 km, 25 km and 10 km routes from Windsor Racecourse through the Great Park, Runnymede and the Thames Path. The event provides signed routes, rest stops, medical and massage teams, GPS tracking, and finisher awards..

Experience a guided marathon through the scenic Chiltern Hills and the historic Ridgeway. This supported team run features qualified leads, technical trails, and rolling hills with 500 meters of ascent.