SARHAD, pahnkuhest dar Eron, dar qismi janubii kuhhoi Eroni Sharqi. Az Shimoli Garb, ba Janubi Sharq ba masofai 400 kilometr tul kashidaast, barash 200 kilometr. Balandii qatorkuhhoyash 2500 —3000 metr, pastkhamihoi farokhi bayni onho — qarib 1500 metr.
Qullai balandtarinash 4042 metr (vulqoni khomushshudai Tafton, ki qarib tamomi sol barfpush ast) Landshafti Sarhad biyoboniyu nimbiyoboni buda, dar onho asosan khorbuttaho meruyand; bolotar az 2000 metr dashthoi kuhiand. Nishebihoi pasti pahnkuh ba kishtzori lalmi tabdil doda shudaand.