Coming a long way from doodling Mickey Mouse the map has not been seen in public for more than 60 years.
The map was originally needed for securing finances for the park and it was bought from Grenade Curran, a former Disney employee.
Curran saw the map in Disney's office in 1955 and asked to keep it and he's had it for all these years!
It will sell anywhere between $750,000 to $1,000,000 It will be the most valuable Disneyland object ever auctioned
Mike Van Eaton said: "That an artifact like this, which is so deeply rooted in the creation of Disneyland, still exists today is astonishing.
"The single most significant piece of Disneyland memorabilia to come to auction to date".
The auction will take place in June at Van Eaton Galleries in Sherman Oaks, California, but you can see it in person in May at the exhibition.