Logo

Knacker Cracker

Dorking, United Kingdom • 1 Jan 2026

The Knacker Cracker is a challenging 10K trail race held annually at Box Hill, Surrey, starting from Denbies Vineyard near Dorking, UK. Known as "Britain's toughest 10k," the course features a demanding route with 473m of ascent and 335m of descent over rough, steep, and often slippery terrain. The race offers spectacular views of the North Downs, Mole Gap, Denbies Vineyard, and Dorking.

It includes multiple steep climbs, notably through Happy Valley, and forbids headphones to encourage runner interaction. The event also features a kids' fun run and a ladies' race. Parking and registration are at Denbies Vineyard, with the finish at the top of Box Hill. Visit the organization's website for the most recent information.

United Kingdom South East (England) Dorking

Race information

Website
10 km
473 m+
10k
Visit the organization's website for the most recent information.
Trail runs nearby

Centurion North Downs Way 100

Farnham - 20 mi from Dorking

The Centurion North Downs Way 100 is a challenging 103-mile continuous trail ultramarathon held in South East England, running from Farnham in Surrey Hills to Ashford in Kent. The course features approximately 11,000 feet of elevation gain, traversing scenic English countryside, villages, and notabl..

Thames Meander Summer

Richmond - 16 mi from Dorking

The Thames Meander Summer is a scenic riverside running event held in Richmond, starting at the Petersham & Ham Sea Scouts HQ and following the Thames Path towpath towards Canbury Gardens in Kingston-upon-Thames. It offers three race distances: a 10km (one 6.25-mile out-and-back loop), a half marath..

Henfield Half Marathon

Henfield - 21 mi from Dorking

The Henfield Half Marathon is an off-road running event held at Henfield Leisure Centre in Henfield, UK. The scenic half marathon course features trails along a riverbank and a disused railway, incorporating flint paths and stiles, offering a unique and picturesque running experience. The event welc..

Hart 4

Minley - 21 mi from Dorking

Hart 4 is a unique 4-hour trail relay held at Minley Manor, Hampshire, where teams of four compete on a 4 km off-road course. The event features an undulating route through woods and grasslands, combining hills and flat sections to challenge and engage runners. Teams aim to complete as many laps as..

Dinton 5km & 10km Summer Series

Hurst - 27 mi from Dorking

The Dinton 5km & 10km Summer Series, hosted by Barnes Fitness, is a popular running event held at Dinton Pastures Country Park near Reading. Celebrating its 13th year, the series takes place over four months with races on select Thursdays from May to August. It features friendly, traffic-free off-ro..

Windsor & Eton 10km

Windsor - 21 mi from Dorking

The Windsor & Eton 10km is a scenic multi-terrain trail run held in the historic Royal town of Windsor, starting and finishing near the Windsor & Eton Brewery by the River Thames. The pancake-flat course covers 10 kilometers, featuring towpaths, footpaths, and short road sections through areas inclu..