The Jebel Akhdar (Arabic: الجبل الأخضر al-Jabal al-Akhḍar, English: The Green Mountain) is a heavily forested, fertile upland area in northeastern Libya. It is located in the modern shabiyahs or districts of Derna, Jabal al Akhdar, and Marj.
The Jebel Akhdar consists of a mountainous plateau rising to an altitude of 900 metres (3,000 ft), cut by several valleys and wadis. It forms the north-western part of the peninsula that sticks north into the Mediterranean Sea, with the Gulf of Sidra on the west, and the Levantine Basin on the east. It runs from Bengazi eastward to just east of Derna, fronting the coast for about 330 kilometres (210 mi). Due to erosion and deposition the plateau is sometimes as much as 16 kilometres (9.9 mi) from the shore, but it forms cliffs on the headlands. The final uplift and arching of the plateau was completed in the Miocene.
The region is one of the very few forested areas of Libya, which taken as a whole is one of the least forested countries on Earth. It is the wettest part of Libya, receiving some 600 millimetres (24 in) of precipitation annually. The high rainfall contributes to the area's large forests containing Chammari, and enables rich fruit, potato, and cereal agriculture, something of a rarity in an arid country like Libya. Camels, goats and sheep are herded in and around the Jebel Akhdar and the herders tend to be nomadic.