The Shortest Day

Westhumble, United Kingdom • 19 Dec 2026

The Shortest Day

The Shortest Day is a dawn to dusk winter trail challenge at Box Hill, Dorking, held on Saturday 19 December 2026. The event takes place from sunrise to sunset and is organised by The Trail Run Collective at Box Hill Main Car Park.

Participants run a roughly 10 mile trail loop with approximately 2,400 ft of elevation gain per lap. Runners may stop after any completed loop and therefore choose how many laps to complete within the daylight hours.

Entry requires a minimum age of 18 on the event date. Entries open 12 March 2026 and close 12 December 2026. Entry fees change in tiers during the entry period.

Entry includes full insurance, medical cover, aid stations and a finisher medal. The event offers an optional XCover product that may allow a refund if a participant cannot attend for unforeseen reasons.

Event information also notes an event disclaimer, terms and conditions, and a cancellation and refund policy. Visit the organization's website for the most recent information.

Race information

10 mi
10-Mile Trail Loop
Visit the organization's website for the most recent information.
Trail runs nearby

The Maverick North Downs Trail will take place in Cranleigh on Saturday 27 June 2026. You can run between 6 and 53 kilometers.

Trail races of Half Marathon, 10K and 5K run from Marlow Rugby Union Football Club on 28 June 2026, using marked off road routes through the Thames Valley countryside with marshals, chip timing and race photos.

A Half Marathon at Box Hill Fort (Tadworth) on 28 June 2026 with more than 3000 feet of ascent and descent. The route runs mainly on rough tracks and offers views over the North Downs, the Mole Gap, Denbies Vineyard and Dorking.

Pretty Muddy 5k at Blackheath Common on 28 June 2026. A grassy obstacle course with staggered wave starts, marshals on the route, toilets and refreshments available, and a minimum fundraising target of £50.

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