The San Diego Model Railroad Museum is a model railroad exhibit in San Diego, California. At 27,000 sq. ft., it is the largest indoor such exhibit in North America, and one of the largest in the world. The museum is on the lower level of the Balboa Park Casa de Balboa on the Prado in Balboa Park. The museum is open Tuesday through Sunday .
Nearly three million people have passed through the center since it opened in 1982.
The San Diego Model Railroad Museum is a 501(c)(3) charitable organization.