Um Su (Obersaxen-Mundaun)

Um Su (Pass Um Su) is a remote, high-altitude snowkiting spot in the Obersaxen-Mundaun area, situated around 2,300 meters. Access is typically done either via a long hike from Vignogn (about four hours) or from the Obersaxen ski side: take ski lifts to Sezner, ski down to Alp Nova, then hike roughly 30 minutes to the pass/plateau. The launch is described as a wide open alpine plateau / mountain pass area with moderate launch difficulty. The wind is consistently described as strongest from the North to Northeast sector—N, NNE, and NE. Reported wind strength ranges around 12–25 knots, with moderate gustiness and moderate wind reliability. Regional context also highlights diurnal mountain-valley breezes on clear days, with a daytime thermal window reported as 11:00–16:00, supporting afternoon snowkiting conditions in winter. Snow conditions are described as packed and/or powder depending on source, with terrain clearly backcountry in character (mountain, remote, and open). Safety is a key focus: sources note avalanche risk, changing alpine weather, and that the south side of the pass can become turbulent in North winds. Practical guidance includes avoiding ski slopes, staying in open obstacle-free terrain, checking the avalanche bulletin before you go, and using protective gear (notably a helmet) for jump sessions. Rescue coverage at the spot is described as no direct rescue; however, REGA (Swiss Air-Rescue) is available via 1414, and emergency services can be reached via 144 (regional). Crowds are described as quiet even in peak periods because reaching the pass requires a hike, keeping the spot low-profile and niche among snowkiters who know the approach.