Mount Sagmatas (el|Σαγματάς, grc|Ὕπατος|Hypatos, la|Hypatus) is a mountain of Boeotia, Greece. In antiquity, it was called Hypatos and hosted a temple of Zeus. It bounded the Theban plain on the east, towering over the town of Glisas, and the river Thermodon ran down it on course to Teumessus.