Big Thunder Mountain has long been one of Walt Disney World’s most beloved thrill rides, known for its speedy mine train adventure through caverns and canyons, over water and geyser fields.
The attraction first opened at Disneyland in California in 1979, and soon after at Disney World. Its roots, however, go back further than the original park itself, tied to Walt’s fascination with the American frontier and mining history. Let’s take a brief deep dive into the attraction’s history, and how it all ties back to Orlando’s lengthy coaster refurbishment today. (And for your listening accompaniment: open here!)
Big Thunder Mountain Railroad’s origins trace back to Rainbow Caverns Mine Train at Disneyland from 1956 to 1959, which was a much slower-paced train tour through the old west inspired by Walt’s interest in the southwestern landscape of the United States; including his home retreat at Smoke Tree Ranch. The ride featured pitch-black caverns with black-lit waterfalls and rivers with fluorescent materials. A vintage Disneyland postcard contains the best lighting and image quality to travel back and see what this first iteration looked like:
Walt Disney’s visits to the historic Knott’s Berry Farm, including his appreciation for the Calico Mine Ride, also helped inspire this mine-train concept:
Check out Knott’s colorful stalactites and stalagmites!
Image source: OC Register
Back to Disneyland:
From 1960 to 1977, the attraction site evolved into Mine Train Through Nature’s Wonderland, where some of the original structures and pieces from Rainbow Ridge remained as a nod to Walt’s initial Old West vision for the attraction. The ride also featured animatronic wildlife and colorful rock formations.
Enter Tony Baxter (The Spark of Big Thunder)
Tony Baxter, a young Imagineer, became the creative driving force behind Big Thunder Mountain. After reviewing Marc Davis’s grand (but ultimately unaffordable) Western River Expedition concept for Disney World’s Magic Kingdom, Baxter captured its mine-train portion and pitched it as a standalone thrill ride. “On the front of his attraction, he had the appearance of a mine train ride,” Baxter recalled. “It wasn’t developed enough… I was very inspired by that, and I knew I had to extract it…”
As Disneyland’s Mine Train aged and guests craved more excitement, Baxter was asked to adapt his Florida concept for Anaheim. “Guests, especially young guests, were seeking thrill attractions… ‘We really liked what you were doing in Florida… could you make that work at Disneyland?’” he recounted.
“I always think of Disneyland as charming… I always think of Disney World as spectacular.” For Big Thunder, Baxter chose Bryce Canyon’s hoodoos as a model because “the rocks have a fairy tale-like quality…”
Image source: National Park Services
Ultimately, Baxter brought the Old West to life in a new attraction that gave guests a more exciting experience as they boarded a train for the adventurous frontier of the 1800s.
The first version of Big Thunder opened at Disneyland in 1979, and notably was the first major attraction built without Walt Disney’s involvement. The ride recycled elements from its predecessor, including the town’s name “Rainbow Ridge”, the Rainbow Caverns references, and resembling locomotives. Walt Disney World received their own runaway mine train just a year later in 1980, with the town of Tumbleweed.
According to Baxter, the dinosaur fossil in both versions were placed in homage to Disneyland’s Mine Train Through Nature’s Wonderland, as you would pass “Dinosaur Trail”.
Disney World’s New Rainbow Caverns
And now today, we have Disney World’s Big Thunder Mountain Railroad currently undergoing an extended refurbishment. It closed in January of this year, and is slated to open sometime in spring 2026. Disney has recently released new concept art for what we can expect for the revamped mine train, featuring a new, enhanced Rainbow Caverns scene.
This echoes the original Disneyland ride’s nostalgic tribute to Nature’s Wonderland. The attraction’s story also fittingly pays tribute to the Disney Legend Tony Baxter as Big Thunder Mining Co.’s owner, Barnabus T. Bullion.
From early inspiration in Knott’s Berry Farm, to Baxter’s creative breakthrough adapting Marc Davis’ proposal, Big Thunder Mountain Railroad is a testament to Imagineering mastery, and the addition of the new Rainbow Caverns scene continues that legacy.
This Disney mountain has consistently been a must-do for families spanning generations visiting Walt Disney World. Do you remember your first ride?
I have many childhood memories of quickly making my way down the double loading zone once upon a Magic Kingdom evening, and happily requesting the back row for my favorite “bumpy train”. I can’t wait to be back on that wildest ride in the wilderness, and to see what undiscovered new details await in the months ahead!
