Hymettus, also Hymettos (, phonetic spelling Imitós) is a mountain range in the Athens area, East Central Greece. It is also colloquially known as Trellos or Trellovouno (crazy mountain), probably because of its propensity to change colors under shifting sunlight. The height is 1,026 m at Evzonas and the length is 16 km (10 mi) between Athens and the Saronic Gulf and 6 to 7 km from east to west.