High Quality Content by WIKIPEDIA articles! The Walt Disney World Railroad (or WDWRR for short) is a narrow gauge railroad circling the Magic Kingdom theme park at Walt Disney World Resort. Operated by Main Street Operations, the 3 ft (914 mm) gauge, 1.5-mile (2.4 km) railroad circles the entire park with stations at Main Street, U.S.A. and Frontierland, and formerly at the now-closed Mickey`s Toontown Fair. One of the busiest steam-powered railroads, it transports over 1.5 million passengers each year.