Begun by the Class of 1906, Senior Walk contains the names of more than 120,000 graduates, beginning with the first class inscribed at the foot of the Old Main steps. It is a unique, much-loved tradition of the University, covering nearly five miles of paved walks throughout the campus. Originally stamped by hand, the names are now etched by a machine known as the Senior Sand Hog, invented in 1986 by University Physical Plant employees.