The Boulderfist clan is a clan of ogres that live throughout the Arathi Highlands in Azeroth and Nagrand in Outland (hinting that it may have parted when the Dark Portal closed at the end of the Second War).
Their main bases on Azeroth include Boulder'gor and Boulderfist Hall; they also control a significant portion of present-day Stromgarde.
On Outland, a large contingent of Boulderfist ogres roam throughout Nagrand (clefts of Halaa, Burning Blade Ruins, and the hills northwest of Kil'sorrow Fortress) and parts of Terokkar Forest (Bleeding Hollow Ruins). Their leader is a half-orc half-draenei quest giver named Lantresor of the Blade. A six-part quest chain involves Lantresor and either the Telaar or Mag'har settlement, depending on your faction.
World of Warcraft
One of the realms in World of Warcraft is named after the Boulderfist clan.