The Grizz's fortress was a massive fortress owned by the Grizz and located in Gungathal Valley in the year 10,000 BC. It appeared in Clan of the Cave Raccoon of Sly Cooper: Thieves in Time.


When the Grizz was hired by Cyrille Le Paradox to time travel to Gungathal Valley in 10,000 BC to steal Bob Cooper's cane, he built himself a fortress in the valley, to serve as his main base of operations. Here, he plotted to create cave paintings in the past, only to dig them up in the present day to become famous again.


The fortress consisted of a number of locations, including:

  • Lair of the Bear
  • Frostbite Peak
  • Cooling Caverns
  • Purple Paw Paint Factory

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