Otto 12K is a 12.0 km trail race of Patagonia Bariloche by UTMB 2025 in Bariloche, Argentina. The race starts on November 18, 2025. The course climbs 437 m+ and descends 602 m−, between a low point of 787 m and a high point of 1313 m. By gradient, 33% of the distance is uphill, 50% downhill and 17% flat. The longest climb runs 2.8 km at an average 11.8% grade (333 m of vertical). The longest descent runs 2.9 km at 10.9% (317 m of vertical). Surface: 73% trail, 15% road, and 10% smooth. Flat-equivalent effort: 13.3 FlatKM.
224 finishers completed the 2025 edition. Men's winner: Jonas Marinao (Argentina) in 58:57. Women's winner: Jimena Aliotti (Argentina) in 1:11:54.
This page has the full results and splits, interactive elevation profile, gradient matrix, pacing and nutrition planner and weather climatology for Otto 12K.
Other distances of Patagonia Bariloche by UTMB 2025Tronador 130K (132 km)·Frey 80K (86.0 km)·Bella Vista 55K (58.0 km)·Nahuel Huapi 33K (36.0 km)·Arrayanes 22K (22.0 km)
Official websitebarilochebyutmb.utmb.world
