Mount Imeon (//) is an ancient name for the Central Asian complex of mountain ranges comprising the present Hindu Kush, Pamir and Tian Shan, extending from the Zagros Mountains in the southwest to the Altay Mountains in the northeast, and linked to the Kunlun, Karakoram and Himalayas to the southeast. The term was used by Hellenistic-era scholars as "Imaus Mount", even though non-Greek in etymology, and predating Alexander the Great.
A detailed description of the mountainous territory and its people was given in the Armenian geography index Ashharatsuyts written by Anania Shirakatsi in the 7th century AD (or possibly by Moses of Chorene in the 5th century.) According to the original Ashharatsuyts mapping reconstructed by Acad. Suren T. Eremian, the mountain system was divided into four branches (delimited by green dotted lines on the map) corresponding respectively to four present ranges:
The mountain system was crossed by a segment of the Silk Road leading westwards from Yarkand to the Stone Tower in eastern Pamir (mentioned by Ptolemy, and shown on the Ashharatsuyts map too), then through the Wakhan Corridor and Badakhshan to reach the ancient major city of Balh (Balkh). An alternative Northern Silk Road went from Kashgar to upper Alay Valley, then crossed the Alay Mountains to enter Fergana Valley.
Mount Imeon was famous for its lapis lazuli deposits in western Badakhshan, indicated on Shirakatsi’s map. The mines at Sar-e-Sang have been producing lapis lazuli for millennia now, supplying the ancient civilizations of Egypt, Mesopotamia, India, and Rome, and still yielding the world’s finest lapis. The Venetian adventurer Marco Polo visited the mines in 1271 during his famous journey to China, following the Silk Road to cross the mountains by way of Wakhan.
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According to Ashharatsuyts the Central Asian territory west of Imeon was inhabited in Antiquity by fifteen old artisan and trading nations: Massagetae, Bulgars (Bulhi in Armenian; Shirakatsi uses the same name for the Bulgars who inhabited the valleys of Northern Caucasus at his time, and according to Moses of Chorene had settled also the Bulgarian-Armenian principality of Vanand before that), Khwarezmians (‘Horozmiki’) etc., and by forty-three nomadic tribes including the Hephthalites and Alchons. Apart from Anania Shirakatsi, other historiographers in late Antiquity and the Early Middle Ages such as Agathias of Myrina, Theophylact Simocatta, and Michael the Syrian also identify Mount Imeon as an early homeland of the ancient Bulgars — where the ancient Kingdom of Balhara was located.