Aiguilles Rouges, Mountain range in Haute-Savoie, France
Aiguilles Rouges is a mountain range in Haute-Savoie, France, running along the north side of the Arve Valley, with its highest point reaching around 2,965 ft (900 m) above the valley floor. The range is made of metamorphic rock, granite, and sedimentary formations, giving the peaks their characteristic reddish and grey tones.
Before the 18th century, the slopes were used mainly by shepherds moving their flocks between valley pastures and high alpine grasslands each summer. The first ascent of Mont Blanc in 1786 drew explorers and climbers to the entire Chamonix area, and the Aiguilles Rouges gradually became a destination in their own right.
The Aiguilles Rouges face the Mont Blanc massif directly, giving hikers on the western slopes a clear view of the glaciers across the valley. The area is home to a nature reserve where chamois and ibex move freely along the rocky ridges.
The range has a network of marked trails covering different levels of effort, from easy valley walks to more demanding high-altitude routes. Snow can remain on higher paths well into spring, so checking conditions before heading out is a good habit at any time of year.
The metamorphic rocks here contain monazite crystals that formed around 440 million years ago, during the Late Ordovician period. This makes them much older than the Alps themselves, and they offer geologists a window into mountain-building events that predate the current landscape by hundreds of millions of years.
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