The Cragmaw Hideout is a cave complex some 5 miles north of the Triboar Trail. It was used by the Triboar goblins as a post from which to raid the caravans bringing goods from Waterdeep and other places on the Sword Coast to the town of Phandalin.
During those days the goblins in the caves were under the command of Klarg, a bugbear and his second in command, Yeemik. They in turn reported to King Grol, the goblin leader of Cragmaw Castle.
Eventually, the complex was cleared by The Harlequins whilst they searched for Gundren Rockseeker and Sildar Hallwinter, who had been captured by the goblins. Klarg, Yeemik and one other goblin managed to flee. It has remained empty since, the main passageway having been partially blocked by a rockfall.
The Cragmaw cave slopes steeply upward. The entrance is at the foot of a good-sized hill, and the caves and passages are inside the hill itself.