In 2026, "biggest" is measured in three ways: length, height, and physical footprint. At Walt Disney World, the longest ride is Kilimanjaro Safaris in Animal Kingdom, covering 110 acres of land—it is so large that the entire Magic Kingdom park could fit inside its footprint. The tallest ride is Expedition Everest, standing at just under 200 feet. However, in terms of technical scale and physical structure, the biggest indoor "ride" is Star Wars: Rise of the Resistance, which utilizes a massive multi-building complex and several different ride systems to create an 18-minute experience. In 2026, the newly refurbished Big Thunder Mountain Railroad also remains a contender for the largest "mountain" structure, featuring expanded cavern scenes that have increased its total interior square footage significantly during the recent 2025/2026 overhaul.