The 39 Clues Wiki
The 39 Clues Wiki

This article is about a real-world person, place, or thing. For more information, see the corresponding Wikipedia page here.


Mount Fuji is a mountain in Japan. It is the nation's highest point, standing at 12,388 feet tall. It also holds great cultural significance to the locals. A Tomas stronghold is also hidden within the mountain. Mt. Fuji appears in Card 127: Mt. Fuji.


Some of the features within the stronghold include:

  • Surveillance Center
  • Indoor skiing slope
  • Basketball courts
  • Rugby pitches
  • Soccer fields


In The Black Book of Buried Secrets, the Holt Family visited the stronghold on a Madrigal mission.

In Mission Hurricane, Nellie and Sammy broke into the stronghold to discover who the Outcast was. They encountered Magnus Hansen stealing Tomas Clues for the Outcast.


The entrance to the stronghold.