Cailleach

In Celtic mythology, the Cailleach is a divine hag and ancestor, associated with the creation of the landscape and with the weather, especially storms and winter. The word literally means 'old woman, hag'. She is credited with making numerous mountains and large hills, which are said to have been formed when she was striding across the land and accidentally dropped rocks from her creel or wicker basket. In other cases she is said to have built the mountains intentionally, to serve as her stepping stones. --Wikipedia