“Who shall call them from the grey twilight, the forgotten people? The heir of him to whom the oath they swore. From the North shall he come, need shall drive him: he shall pass the Door to the Paths of the Dead.”
-Malbeth the Seer
In this passage, Tolkien was actually referring to the boulderer’s destiny of climbing at Priest Draw. You shall walk the paths of the dead, and the forgotten people will fulfill their oath: to let you cam your flesh into their bomber limestone pockets.