The Igoroin Gorge is a deep, four-kilometer-long canyon carved out by the millennia-long erosive action of the Igoroin River (also known as the Musitu Stream) in the hard limestone and calcareous sandstone of the Iturrieta Mountains in Álava. This natural area features a spectacular landscape of multicolored walls and limestone cliffs, adorned by half a dozen waterfalls that flow along the canyon and empty into the Berrón River, a tributary of the Ega and part of the Ebro River basin. The area is notable for its rich forest cover and has been designated a Forest Reserve by the Provincial Council of Álava, with more than 52 native species cataloged, including gall oaks, beech trees, rowans, ash trees, hazel trees, and a riparian forest that surrounds the river. The most striking species is the maple (Acer opalus), which reigns supreme over the landscape, especially in the fall, when the ravine bursts into a thousand colors. At the bottom of the narrow ravine stands the Igoroin Mill, an old mill that once served the inhabitants of the now-vanished village of Igoroin, adding historical significance to the site. The ravine is considered one of Álava’s natural gems, with great geomorphological, scenic, and biodiversity value, and is a must-see destination in the spring, when the rains cause water to cascade from all sides, and in the fall, when the maple dominates the festival of colors.
