At Walt Disney World's Magic Kingdom, Big Thunder Mountain Railroad is currently undergoing one of its most extensive refurbishments in history. The ride closed on January 6, 2025, and is scheduled to remain closed for approximately one year, with a projected reopening in "Spring 2026." This lengthy closure is not just for routine maintenance; Disney is performing a "mountaintop-to-cavern" refresh, which includes a total track replacement and the addition of "new magic." One confirmed enhancement is a sequence inspired by the legendary "Rainbow Caverns," featuring shimmering pools and phosphorescent stalactites. This year-long downtime ensures the 40-year-old coaster can continue operating safely and smoothly for the next generation of guests while adding fresh show elements to the classic "wildest ride in the wilderness."