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Disney Details Big Thunder Mountain Overhaul, Previews Rainbow Caverns for 2026 Return

Disney unveils Rainbow Caverns with an “active mine” storyline ahead of the coaster’s 2026 reopening window.

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Big Thunder Mountain Railroad
Walt Disney World

Overview

  • Disney confirmed the Magic Kingdom attraction will reopen sometime in 2026, with no specific date announced.
  • The newly revealed Rainbow Caverns scene features phosphorescent pools and iridescent stalactites and stalagmites, with Disney teasing a menacing underground rumble.
  • An updated official description reframes the setting as an active mining site led by Barnabas T. Bullion, and the town of Tumbleweed is no longer labeled a ghost town.
  • Disney describes a mountain‑top‑to‑cavern‑deep refurbishment; multiple outlets report extensive track replacement alongside refreshed effects and vehicles.
  • Disney says additional “new magic” will be announced before reopening, while fan-talk of a revised finale remains unconfirmed.