The C&NW Aurora Branch was abandoned on February 17, 1982, and today serves as the Fox River Trail.
This line is not to be confused with the Aurora, Elgin, and Fox River Electric Railway right-of-way, also abandoned, which closely parallels this route for most of its length (and also runs between Aurora and Geneva and beyond).
See also North Aurora to Geneva, a former Chicago, Burlington and Quincy Railroad line.