At Walt Disney World and Disneyland in 2026, children must be at least 7 years old to ride any attraction alone, including Space Mountain. In addition to the age requirement, Space Mountain has a strict minimum height requirement of 44 inches (112 cm). If a child is under 7 years old, they must be accompanied by another guest who is at least 14 years old. Even if a child meets the height requirement, parents should consider the ride's intensity; it is a high-speed roller coaster that takes place in almost total darkness with sudden drops and sharp turns. For 2026, Disney continues to offer the "Rider Switch" service, which allows one adult to wait with a child who doesn't meet the requirements while the rest of the party rides, and then swap places without waiting in the full line again.