Creigiau Gleision is a mountain in Snowdonia, Wales, near Capel Curig. It is the easternmost of the high Carneddau and is separated from the others by Llyn Cowlyd. Directly across this reservoir from Creigiau Gleision is Pen Llithrig y Wrach. To the north-east it runs into the broad ridge of Cefn Cyfarwydd. Creigiau Gleision affords splendid views in all directions, including northwards to the coast, and down the Ogwen Valley and Dyffryn Mymbyr towards Snowdon.