High Lonesome 100 is a 162 km ultra trail of High Lonesome 100 2025 in Nathrop, United States. The race starts on July 18, 2025. The course climbs 7163 m+ and descends 6467 m−, between a low point of 2498 m and a high point of 3992 m. By gradient, 39% of the distance is uphill, 41% downhill and 20% flat. The longest climb runs 9.7 km at an average 6.3% grade (610 m of vertical). The longest descent runs 9.6 km at 11.6% (1116 m of vertical). Surface: 52% trail, 19% smooth, 17% extreme, 5% technical, and 5% road. Flat-equivalent effort: 228.5 FlatKM.
This page has the interactive elevation profile, gradient matrix, pacing and nutrition planner and weather climatology for High Lonesome 100.
