Some miles to the east of the Firien Wood, there was a wide, shallow recess in the foothills of the White Mountains. Overlooking this region were two of the Beacon-hills of Gondor, Min-Rimmon to the east and Calenhad to the west. Calenhad was the sixth of the seven beacons, within sight of the last of the beacons on the Halifirien, above the borders of Rohan.
Tolkien never gives us the meaning of the name Calenhad directly, but it seems to come from Elvish root-words meaning something like 'green mound'. The name may be connected with Calenardhon, the ancient Gondorian name for the land later known as Rohan, whose borders lay just a few miles from the feet of the hill.