Icemark is a castle along the Wall that has been abandoned by the Night's Watch. To the west lies Hoarfrost Hill and to the east, the Nightfort.
Qhorin Halfhand suggests that Icemark be re-garrisoned to defend the Wall from the wildling horde.
The Weeper is spotted near Icemark prior to the battle beneath the Wall.
Lord Commander Jon Snow re-garrisons Icemark with thirty men, comprised of twenty from the Night's Watch and ten of Stannis Baratheon's men. He puts Bedwyck in command.