Piuquenes Pass (Andes Crossing)

Following the historic path used by the Army of the Andes in 1817, this 6-day trans-Andean expedition traverses the central cordillera from Mendoza, Argentina, to the Cajón del Maipo in Chile. The route crosses two significant high-altitude barriers—Portillo Argentino (4,330m) and Paso Piuquenes (4,030m). Hikers move through a high desert landscape of volcanic rock, vast glacial valleys, and the powerful Tunuyán River. The terrain consists primarily of rocky mountain paths, loose scree on the steeper pass approaches, and high-altitude plateaus where exposure to wind and sun is constant.

The Saxer Lücke is one of the most geographically dramatic points in the Alpstein massif. This 'Lücke' (gap) sits between the vertical limestone 'teeth' of the Kreuzberge and the Rhine valley floor, nearly 1,200m below. The trail from the Staubern cable car station follows a spectacularly flat ridge-line path before descending into the notch. Beyond the gap, the trail drops further to the Fählensee, a dark, fjord-like lake surrounded by vertical rock walls. The contrast between the rolling hills of Appenzell and the sheer, jagged limestone of the Saxer Lücke is staggering.