The course of the path is as follows: it begins at the river Asopus as it flows through the ravine, and this mountain and the path have the same name, Anopaea. This Anopaea stretches along the ridge of the mountain and ends at Alpenus, the Locrian city nearest to Malis, near the rock called Blackbuttock and the seats of the Cercopes, where it is narrowest.The Cercopes, mischievous dwarfs, had been warned against a “mela/mpugos” enemy. Heracles, to rid the country of them, carried off two on his back, hanging head downwards, in which position they had every opportunity of observing his title to the above epithet; until their jests on the subject moved him to release them.

This, then, was the nature of the pass. The Persians crossed the Asopus and travelled all night along this path, with the Oetaean mountains on their right and the Trachinian on their left. At dawn they came to the summit of the pass.

In this part of the mountain one thousand armed men of the Phocians were on watch, as I have already shown, defending their own country and guarding the path. The lower pass was held by those I have mentioned, but the Phocians had voluntarily promised Leonidas to guard the path over the mountain.

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.