Mount Massive Asylum has other uses. Please see Mount Massive Asylum (Disambiguation) for other meanings. 

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The Mount Massive Asylum as it appears in the first trailer.

Mount Massive Asylum for the Criminally Insane is the setting of Outlast and Outlast: Whistleblower. It is located in the remote mountains of Lake County, Colorado, USA.


1945 - The O.S.S. initiates Operation Paperclip, recruiting scientists from Nazi Germany to conduct research for the USA.

1967 - Mount Massive Asylum for the Criminally Insane is established. Three scientists are murdered by an unknown patient. Authorities order the asylum to cease all activities.

1971 - Mount Massive Asylum is finally closed.

1972CIA Director Richard Helms orders all MKUltra files to be destroyed. A small number of documents survive, scattered throughout the asylum.

2009 - The clinic was re-opened by the Murkoff Corporation, which for the next several years conducts illegal experiments on patients with the sole purpose of gaining profit.

Former Personnel

1950s - 1960s

Photos of former personnel (1950-60's) still hang in the Asylum.



  • Administration Block/Return to the Administration Block/Exit: The exterior and interior of the asylum consisting of an outside courtyard, an inside lobby, several corridors containing offices, libraries, and security rooms, and a halfly flooded basement where the block's generator resides. It also contains a church.
  • Prison Block/Prison: Where the violent patients are imprisoned. Contains several blocks of prison cells, is glued together by several airlocks, and has a shower-room at its heart.
  • Sewer: The underground sewer system of the asylum.
  • Male Ward: A large system of wards where the male patients are treated. It also contains a cafeteria, laundry room, bathing room, and is suggested to be at the very back of the asylum as it as a large back exit leading into the Courtyard.
  • Courtyard: A courtyard arena where several maintenance sheds are housed.
  • Female Ward: A large system of wards where the female patients are treated. It is suggested this is one of the oldest, if not the oldest, building in the asylum as female patients have been absent for some time and the entire building is extremely old and decaying.
  • Underground Lab: A brightly lit underground complex of offices, laboratories and security rooms dedicated to powering the complex's heart: the Morphogenic Engine. Can be accessed by either several hangers that lead to outside or an elevator near the Administration Block's church.
  • Hospital: Resembling a more modern combination of both aforementioned wards, the Hospital is a large network of laboratories, patient-rooms, and plastic-wrapped corridors where the patients undergo the Morphogenic Program.
  • Recreation Area: A fenced-in courtyard where the patients are given fresh-air and a few moments of recreation, including basketball.
  • Drying Ground: Another outside courtyard where several guard posts and towers are stationed.
  • Vocational Block: A large block containing an old above-ground attic/storage room looking even older than the Female Ward. The Vocational Block has several arts-and-crafts tools housed in it, implying that this building was made to keep the patients busy with artistic tasks like sewing.


  • Mount Massive is based off a real mountain of the same name, located in the Sawatch Range of the U.S. state of Colorado.
  • Mount Massive Asylum is modeled after H. H. Richardson Complex, which is also a mental asylum located in Buffalo, New York.


Start a Discussion Discussions about Mount Massive Asylum

  • Is the Mount Massive Asylum near the Temple Gate?

    3 messages
    • Not the same mountains. The asylum is in Colorado while Temple Gate is in Arizona.
    • Just checked Google Maps and no, Mount Massive is no where near Arizona.
  • Former employees EYES

    2 messages
    • Hi all, I'm new here and this is my first post on the forum. I'm sure you've all seen those portraits of former employees hang...
    • I never noticed it myself, but now that I've seen your edits, it's quite odd how that is. You've got a good eye (pun very m...

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