The Hidden Fortress (French: La Forteresse suspendue) is a Canadian children's comedy film, directed by Roger Cantin and released in 2001. Part of Rock Demers's Tales for All (Contes pour tous) series of children's films, the film centres on two groups of rival children playing war games while spending summer vacation with their families at cottages on a lake, which are complicated when the leader of the losing team resorts to detaining prisoners of war in a desperate attempt to win the game.

The cast includes Matthew Dupuis, Roxanne Gaudette-Loiseau, Jérôme Leclerc-Couture, Jean-Philippe Debien, Charli Arcouette-Martineau, Xavier Dolan, Laurent-Christophe De Ruelle, Jeremy Gagnon, Carmina Senosier, Émilie Cyrenne-Parent, Serge-Olivier Paquette, Hugo Dubé, Georges Brossard, Patrick Labbé, Isabelle Cyr, Gaston Caron, Fayolle Jean and Mireille Metellus.

Although not officially billed as a sequel to the earlier film, some of the children's parents were participants in the events of The Dog Who Stopped the War (La Guerre des tuques).