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Big Thunder Mountain Railroad Sets May 3 Reopening With 38-Inch Height Rule

A full track swap with a Rainbow Caverns scene helps keep the classic running for years.

Overview

  • Disney, which confirmed the plans Wednesday, set May 3 for the Magic Kingdom coaster’s return and lowered the minimum rider height to 38 inches.
  • Engineers replaced the entire steel track and rolled out refreshed trains, with restored effects and updated animatronics to improve reliability without changing the ride’s core feel.
  • The update adds Rainbow Caverns, an underground stretch with glowing pools and shimmering rock formations that deepen the Barnabas T. Bullion mining tale.
  • Walt Disney World president Jeff Vahle and park leaders completed test rides after a safety review that supported the permanent height change.
  • The attraction has been closed since January 2025 for a roughly 14–16 month overhaul, and nearby Frontierland work will keep some construction walls up that could affect how guests move through the area.