Hellfire Ramparts is one of the dungeons in Burning Crusade Classic. It can be accessed from level 57.
The entrance is located in the central part of the Hellfire Citadel, in the heart of the Hellfire Peninsula in Outland.
Location
To access the Heroic difficulty, you must be level 70 and in possession of the Flamewrought Key, which is available to players who have attained Revered reputation with Honor Hold (Alliance) or Thrallmar (Horde).