How fast could Maniac Magee run?

In the novel "Maniac Magee" by Jerry Spinelli, the protagonist Jeffrey Lionel Magee is depicted as an exceptionally fast runner. While an exact speed is not provided in the book, it is mentioned that he could outrun anyone in town, including high school track stars. Magee's speed is described as almost magical, earning him the nickname "Maniac" for his extraordinary running abilities.