Carrock was a stony eyot in the upper reaches of the River Anduin, to the north of the Old Ford a few miles west of Beorn's farmstead.
During their journey to the Lonely Mountain (Erebor), Thorin and Company were housed there overnight by the Eagles before they went to see Beorn.
Gandalf states that the steps from the base of the rock to the flat top were made by Beorn and that "Carrock" is Beorn's name for it.
This is somewhat of a linguistical joke on Tolkien's part; in Anglo-Saxon carr means "rock" and in Welsh, carreg also means "rock, stone".
Conceptual art for The Carrock
- ↑ The Hobbit, Chapter VI: "Out of the Frying-Pan into the Fire"
- ↑ The Hobbit, Chapter VII: "Queer Lodgings"