While Aiguilles Rouges mountain range and its National Nature Reserve provide sublime skiing in winter, the true glory of this natural reserve is revealed once the snow melts. Earning its name from the granite spires that glow red at sunrise, this spot in Argentière boasts walking trails at all levels of difficulty. Its slopes above the Chamonix Valley entice hikers with a penchant for Alpine pastures; its elevated lake (Lac Blanc) bewitches as it reflects the Mont Blanc massif on its emerald surface. Many hikers devote days to exploring Aiguilles Rouges, declared a natural reserve in 1974, taking in fields of orchids, as well as ibex, marmots, chamois, and deer. To delve deeper into the abundance of fauna and flora, visit the information cabin at the Col des Montets, open May to September.