The Rif or Riff (Tamazight ⴰⵔⵔⵉⴼ Arrif) is a mainly mountainous region of northern Morocco, with some fertile plains, stretching from Cape Spartel and Tangier in the west to Ras Kebdana and the Melwiyya River in the east, and from the Mediterranean in the north to the river of Wergha in the south.