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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.
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