A navigational ultramarathon in the North York Moors National Park centred on visiting five trig points across open moorland terrain. Distance varies depending on route choice but typically exceeds 50 km with substantial ascent. The event is not fully marked and requires competent navigation across tracks, paths and pathless moorland sections. Terrain includes heather moor, stone tracks and rough ground, with exposure on higher plateaus. Checkpoints are positioned at trig locations, with safety procedures defined by the organiser.