The gorges of the regional unit of Heraklion are mainly formed in the mountain ranges of Psiloritis and the Asterousia Mountains, as well as on the western slopes of the Dikti range. The landscape of Asterousia is dry and rocky, with gorges ending at secluded shores of the South Cretan Sea. The best-known hiking routes include Agiofarago Gorge, Martsalo Gorge and Trafoulas Gorge, while the same mountain range also contains many technical canyons with vertical descents and waterfalls.

On Psiloritis, the Rouvas Gorge, also known as Gafaris, crosses the forest of Rouvas. The same mountainous zone includes the Kroussonas Gorge, the Vorizia Gorge and the gorges of Asites. These routes combine rugged mountain terrain with forests, springs and old passages that once connected the northern settlements with the interior of Psiloritis.

Near the city of Heraklion lies the interconnected system of the Astrakiano, Kounaviano and Knossano gorges, while farther west are the gorges of Almiros and Venerato. On the western slopes of Dikti are the Roza Gorge and the Ambelos Gorge, while near Hersonissos lies the Aposelemis Gorge.