A winter Pennine Trail event covering the northern section of the Pennine Way from Hardraw to Kirk Yetholm over approximately 46 miles (74 km). The route follows remote upland terrain including moorland paths, flagstone sections and exposed high ground. Conditions are typically severe, with navigation and self-sufficiency requirements central to the event. Checkpoints provide support at intervals along the course.

• Other races at the same event:
Summer Spine Sprint South
Summer Spine Challenger
Summer Spine Race