Named for the rare red butterflies that fill the gorge in spring and early summer, this scenic hike begins at Dasaki near Koutsouras. The trail is framed by dense vegetation, shady pine trees, and aromatic herbs, leading past centuries-old chapels like Saint Dimitrios and Afentis Christos. The route includes panoramic views of the surrounding valleys and mountains and concludes at Peristeras Waterfall, a dramatic 20-meter cascade feeding into a natural basin. Take a refreshing swim and enjoy the tranquil setting. This trek offers a perfect mix of wildlife, tradition, and natural serenity in a lesser-known corner of eastern Crete.