Thetford Backyard Ultra

View all races for Sep 2027

Thetford Backyard Ultra takes place at High Lodge in Thetford Forest, Suffolk, offering a last person standing endurance challenge alongside 6 and 12 hour options. Runners tackle repeated 4.17 mile laps, with the main race continuing until only one participant remains able to complete another loop.

The flat forest course follows mostly gravel and grass footpaths, with firm ground, good drainage and just one small hill. A new lap begins every hour, and runners must complete each circuit within 60 minutes to continue. The shorter options use the same course and hourly start format, ending after their respective time limits.

Organised by Challenge Running, the event features chip timing, a central aid station with refreshments and free onsite camping for runners and crews. Toilets and support facilities are available near the start area, providing a practical base between laps throughout this demanding forest challenge.

Location