The province of Siteia is covered by the Siteia mountains – the highest of which are Thrypti/Afenti (1476 m) at the west and Ornos (1237 m) to the north. To the east the massif, occupying essentially the entire east portion of Crete, is compact and with low peaks that do not rise above 800 m in height.
The most important geomorphological features are on the south and west faces: here is the imposing Ha Gorge, dangerous and difficult of access.