The Coastal Mountain Range (Arabic: سلسلة الجبال الساحلية Silsilat al-Jibāl as-Sāḥilīyah) is a mountain range in northwestern Syria running north-south, parallel to the coastal plain. The mountains have an average width of 32 kilometres (20 mi), and their average peak elevation is just over 1,200 meters with the highest peak, Nabi Yunis, reaching 1,562 metres (5,125 ft), east of Latakia. In the north the average height declines to 900 metres (3,000 ft), and to 600 metres (2,000 ft) in the south.
Classically, this range was known as the Bargylus; a name mentioned by Pliny the elder. The Greek "Bargylus" had its roots in the name of an ancient city-kingdom called Barga most probably located in the vicinity of the mountains; it was a city of the Eblaite Empire in the third millennium BC, and then a vassal kingdom of the Hittites, who named the mountain range after Barga.
Under the Hashashins were known as the Jabal Bahra (جبل بحراء). They are also sometimes known as the Nusayriyah Mountains (جبال النصيرية Jibāl an-Nuṣayriyah) or the Alawiyin Mountains (جبال العلويين Jibāl al-‘Alawīyin); both of these names refer to the Alawi ethnoreligious group which has traditionally lived there, though the former term is based on an antiquated label for the community that is now considered insulting.
The western slopes catch moisture-laden winds from the Mediterranean Sea and are thus more fertile and more heavily populated than the eastern slopes. The Orontes River flows north alongside the range on its eastern verge in the Ghab valley, a 64 kilometres (40 mi) longitudinal trench, and then around the northern edge of the range to flow into the Mediterranean. South of Masyaf there is a large northeast-southwest strike-slip fault which separates An-Nusayriyah Mountain from the coastal Lebanon Mountains and the Anti-Lebanon Mountains of Lebanon, in a feature known as the Homs Gap.