The Mortmain Mountains are a fictional mountain range first mentioned to the Baudelaires by Jerome Squalor in The Ersatz Elevator, when he speaks of Mount Fraught, the highest peak in the range. The Mountains are home to Snow Gnats, the cave that sheltered both the Volunteer Feline Detectives and the Snow Scouts, and the Valley of Four Drafts where the V.F.D. Headquarters was located before its destruction in book ten. The Stricken Stream also makes its home in the Mortmain Mountains, with its source at the peak of Mount Fraught.