The most extensive and longest sustained activity at the site spanned the Late Bronze Age, beginning with significant deposits of Middle Helladic – early Mycenaean Minyan and Matt painted wares. Evidence for the Mycenaean settlement in Late Helladic periods is not surprising since the site of Eleon appears as e-re-o-ni on two Linear B tablets from Thebes (Ft 140.5 and X 155.1). Occupation extends well into the LH IIIC phases, which was a period of vitality at Eleon, when crafting shows connections to Lefkandi and sites of the Euboean Gulf.
Beginning in 2015, excavations began to focus on burials of the Early Mycenaean period located within and around a funerary monument known as the Blue Stone Structure. The various ceramic vessels found deposited in the tombs date to the Late Helladic IA period, contemporary with the Shaft Graves of Mycenae. In addition to ceramics and simple adornments in metal or stone, one striking grave good is a copper alloy dagger of a form found in Crete and the Peloponnese.