The minimum height requirement for Space Mountain at Disneyland is 40 inches.
That threshold applies to the Disneyland Park attraction in Anaheim, California. Guests must be at least 40 inches tall, or 102 centimeters, to board the indoor roller coaster. Cast members use height markers at the entrance and may measure children before they enter the ride.
Disneyland’s Space Mountain opened in Tomorrowland on May 27, 1977. It was built after the success of the Matterhorn Bobsleds and became a fully enclosed, space-themed steel coaster. Its track is 3,459 feet long, while the attraction’s top speed is about 32 miles per hour.
A frequent mix-up comes from comparing Disney parks: Space Mountain at Walt Disney World’s Magic Kingdom traditionally requires riders to be 44 inches tall. The Disneyland requirement is lower, but meeting the height rule does not guarantee that every child will be comfortable with the darkness, speed, and sudden turns.