For the DS9 novel, please see Valhalla (novel).
In Norse mythology, Valhalla was the name of their afterlife.
In 2287, James T. Kirk expressed his belief to Leonard McCoy and Spock that when he finally died, he would be alone. Still incensed after the captain's brush with death while climbing El Capitan, McCoy quipped, "Well, I'll call Valhalla and reserve you a room." (Star Trek V: The Final Frontier)