The Phocians learned in the following way that the Persians had climbed up: they had ascended without the Phocians' notice because the mountain was entirely covered with oak trees. Although there was no wind, a great noise arose like leaves being trodden underfoot. The Phocians jumped up and began to put on their weapons, and in a moment the barbarians were there.

When they saw the men arming themselves, they were amazed, for they had supposed that no opposition would appear, but they had now met with an army. Hydarnes feared that the Phocians might be Lacedaemonians and asked Epialtes what country the army was from. When he had established what he wanted to know with certainty, he arrayed the Persians for battle.

The Phocians, assailed by thick showers of arrows and supposing that the Persians had set out against them from the start, fled to the top of the mountain and prepared to meet their destruction. This is what they intended, but the Persians with Epialtes and Hydarnes paid no attention to the Phocians and went down the mountain as fast as possible.