A 50 km ultramarathon through Glen Lyon in the Scottish Highlands with significant ascent across remote glen and hill terrain. The route follows estate tracks, rough trails and sections of open hillside, with sustained climbs and descents typical of Highland races. Underfoot conditions vary from firm track to rougher path and grassy ground. Navigation requirements and course marking depend on the organiser’s event format, with checkpoints and aid stations located at key access points along the route.