Callidromus is the mountain that overhangs Thermopylae. It is usually not counted as part of Cnemis, which is the next mountain east.

The account of Cnemis in Smith, based on some of the ancient sources, seems to pinpoint the location of the populated mountain. A spur of this mountain, Smith says, running out into the sea, formed the promontory Cape Cnemides (???u????), opposite the islands called Lichades and the Euboean promontory