Less than an hour from Madrid, the Sierra de Guadarrama rises into a different Spain: cooler air, granite ridges, pine forests, high pastures, glacial lakes, and villages built from stone. It feels wild in places, yet it has shaped human movement for centuries. Armies crossed its passes, shepherds used its slopes, and walkers still follow old tracks between valleys. Declared a National Park in 2013, Sierra de Guadarrama protects one of the most important mountain systems in c