Grey Crag is a Lake District fell of 638 m in Westmorland and Furness. All four of its nearest neighbours lie to the west, so it stands at the eastern edge of its group.
It shares its height of 638 m with Eagle Mountain. Its drop of 41 m makes it a Hewitt but is short of the 150 m a Marilyn needs. Its nearest higher summit, Tarn Crag (Sleddale), is also the hill its key col leads to. Its other name is Sleddale Fell. The highest point is recorded as rocky outcrop, not a cairn.