Alar is one of three cities in the land of Hastur (though this name wasn't mentioned in the play as performed) along with Yhtill and Carcosa. Alar sits on the shores of lake Dehme. The Stranger comes from Alar where he is known as Haita (Alaran for “Stranger”).

Alar invented 'The Pallid Mask' as a foil against The King in Yellow, but it appeared to be ineffective. The wearer of the 'Pallid Mask' is the 'Phantom of Truth', who is also known as The Stranger.

Alar is associated with Aldebaran.

At the end of Carcosa, or The Queen and the Stranger, Alar is about to be destroyed after Yhtill and Carcosa are merged by The King in Yellow.