Dormouse Challenge

Salcey Forest, United Kingdom • 20 Nov 2026

Dormouse Challenge at Salcey Forest

The Dormouse Challenge is a six-hour lap event held at Salcey Forest, a Forestry England site near Northampton with a café and toilets. The site postcode is NN7 2HX. Parking is charged; the organiser has negotiated a reduced day rate of £3.50. The number 33 bus stops inside the forest and the closest train station is Northampton. The site is about 18 minutes from Northampton and nine minutes from Junction 15 of the M1.

The course is a 3.5-mile off-road loop on well maintained pathways. There is no asphalt; surfaces are crushed stone or trodden forest floor. Narrow sections may have tree detritus and can become muddy or slippery when wet. Road shoes may be fine in dry conditions; trail shoes may be preferable when wet.

Entrants choose how many laps to complete within the six-hour limit, so overall race distances can vary. Typical distance targets include:

  • 5k
  • Half marathon (around 4 laps)
  • Marathon (around 7 laps plus out-and-back)

Canicross is allowed; dogs must be kept on short leads and runners should consider starting separately if a dog does not cope well in the main field. Rucking is permitted on this event. A GPX of the route is available but the route may be subject to last-minute changes and will be marked on race day.

The event uses tiered entry pricing with earlier entries cheaper; unaffiliated entrants pay an additional £2. Optional fundraising is available for Roald Dahl’s Marvellous Children’s Charity. Entrants can choose a medal or a Big Bear Tree Token, which results in a tree being planted and contains wildflower seeds. Visit the organization's website for the most recent information.

Race information

80 km
Ultra
26 mi
Marathon
14 mi
Half Marathon
5 km
6 Hour Challenge
Visit the organization's website for the most recent information.
Trail runs nearby

A 21.1 km off-road race on The Ridgeway between Wendover and Princes Risborough with 526 m of ascent. Fully marked route, two aid stations, TRA licence and a four hour time limit; open to runners aged 17 and over.

A six hour endurance run on a scenic 5k loop at Marston Lodge in Marston Trussell. Fully chip timed with solo, pair, and team entry options so runners complete as many laps as they can in six hours.

A multi-terrain 5km in Fermyn Woods Country Park on Wednesday 8th July, part of the Northants 5K Series. Limited parking, bespoke finishers medals and a virtual completion option are available; entries close 23:59 on Tuesday 7th July.

Trail races from 8 km up to a 50 km ultra around Princes Risborough, using ancient beech woods, chalk downs and Ridgeway sections with marked routes and fuel outposts.

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