Yes, you can absolutely visit all four Walt Disney World theme parks in a single day using a Park Hopper ticket, a challenge often referred to by fans as the "Four Park Challenge." As of 2026, the rules for Park Hopping are very flexible; once you enter your first park (for which you may need a reservation depending on your ticket type), you can "hop" to any of the other three parks at any time during their operating hours, provided they haven't reached capacity (which is rare except on major holidays). To successfully pull this off, you need to utilize Disney's transportation system—the Monorail, Skyliner, buses, and boats—effectively. Most "challengers" start at Animal Kingdom (which usually opens earliest) and end at Epcot or Magic Kingdom (which stay open latest). While it's a fun way to hit your favorite "headline" attractions in each park, it involves a lot of travel time and is generally too exhausting for families with young children or those wanting a relaxing vacation.