What mountains run along iran's border with iraq and the persian gulf?

The Zagros Mountain Range

Explanation:

   The Zagros Mountain Range occupies the eastern part of Iraq and mainly Iran, and the Hindu Kush Mountain Range, between Afghanistan and Pakistan. They are a group of mountains in Kermanshah, the largest group in Iran, with the largest peak measuring about 4550 meters. They are about 1.5 km long, and are a full plate for mountaineering and camping.

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