Trail Running calendar near Willen Lake 2026-2027

The Dunstable Downs Half Marathon is a scenic trail race through the National Trust's Dunstable Downs estate. Its hilly 21.2 km course features ridge views, climbs, and a well-stocked aid station. The event is capped at 300 runners and incl..

The Martian Race is a trail run on historic Horsell Common, passing the sandpits from H.G. Wells' 'War of the Worlds'. Organized by volunteers, all proceeds go to local charities. It offers distances from 2k to 21k on a scenic, ecologically..

A multi-terrain 10km run starting and finishing at the Twisted Tree Brewery on the Tusmore Estate. There are standard and canicross options available. All finishers get a medal and a drink.

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

A chip-timed trail running event in Trent Country Park, Enfield, offering a 10 km senior race plus junior and kids races, with race photographs provided and specific safety and age rules for participants.

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.

Experience a scenic trail run through the Cowdray Estate and South Downs National Park featuring distance options for all ages including dog friendly categories and a stacking finisher medal.

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.

Trail event at Hyde Hall Farm offering distances from 5k to ultra marathon with lap options for heavy half and ultra. Aid station, baggage area and secure parking are provided and finishers receive a bespoke or lucky dip medal.

Trail half marathon and 10K around Carsington Water on 27 June 2026, with chip timing, kilometre markers, event photos and a bespoke medal.

Five scenic trail routes from 5km to 52km explore the forests and hills of the Surrey Hills and North Downs Way. The event features marked courses, outpost support, and a bring-your-own-cup policy. Runners receive timing, a finisher's medal..

Run a single-loop course on gravel tracks, woodland trails, and grassy paths in Winchester's South Downs National Park. Choose between a half marathon or a 10km distance on this private estate. Every finisher gets a unique medal.

Explore the Thames Valley trails at the Marlow Trail Run. Choose from a 5K, 10K, or Half Marathon on an all trail course. Every finisher receives a themed medal and free race photos.

TrailFest offers a day of trail running on the forest paths of Salcey Forest, with four distances from 10 km to 50 km. The cupless event has generous cut-off times and is accessible by car or public transport. All finishers receive a medal.

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.

Run a multi-terrain 5km or 10km course starting from the 3 Brewers Brewery in Hatfield. Every finisher gets a medal, a drink, and a souvenir pint cup. The event takes place on 28 June 2026.

This point-to-point ultra follows the unique Hangers Way path through Hampshire's steep wooded hills and villages. Starting at Alice Holt Country Park and finishing at Queen Elizabeth Country Park, the 50K course is fully signed and support..

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.

The Aldbury 5 is a classic 5-mile cross country run through Ashridge Forest. This event has been a fixture for over 30 years. It finishes with prizes sponsored by the local Greyhound Inn.