Challenge 50K is a 50.0 km trail race of Ushuaia Trail Race by UTMB 2026 in Ushuaia, Argentina. The race starts on March 20, 2026. The course climbs 2478 m+ and descends 2474 m−, between a low point of 0 m and a high point of 905 m. By gradient, 37% of the distance is uphill, 38% downhill and 25% flat. The longest climb runs 3.9 km at an average 7.2% grade (280 m of vertical). The longest descent runs 5.2 km at 15.7% (823 m of vertical). Surface: 62% trail, 23% road, and 14% smooth. Flat-equivalent effort: 72.6 FlatKM.
453 finishers completed the 2026 edition. Men's winner: Joaquin Narvaez (Argentina) in 5:10:18. Women's winner: Anabel Oviedo Zelarayán (Argentina) in 6:04:23.
This page has the full results and splits, interactive elevation profile, gradient matrix, pacing and nutrition planner and weather climatology for Challenge 50K.
Other distances of Ushuaia Trail Race by UTMB 2026Epic 130K (112 km)·Advance 85K (86.0 km)·Courage 32K (33.0 km)·Power 22K (22.0 km)·Explore 12K (13.0 km)
Other editions of Challenge 50K2025
Official websitevalholl.utmb.world
