Post Greyhawk Wars: 585 CY
These hills are now wholly within the province of Iuz; those on the western side of the Dulsi River are sacred burial sites to the Wolf Nomads, but they were taken by Iuz’s forces during the war. It may well be that Iuz actively wishes the Wolf Nomads to try to retake them; the caves and catacombs allow for excellent defensive retrenchments and the Wolf Nomads could expend many men to little purpose in attacking now.
The name of these foul hills comes from the bitter north winds that howl down from the Cold Marshes, and from the banshees and spectres said to haunt the sites of ancient evils.
In the Howling Hills, all manner of monsters roam, and the humanoids are especially fierce
(notably hobgoblins, gnolls, and flinds). However, some bold mining of the surprisingly rich ores in key areas yields a steady trickle of silver and copper which Iuz needs badly. It is likely that captured dwarves and gnomes are forced to work as slaves in these mines.