There is a bus that provides free transportation from Mill and University, down to Apache, and then back up to Rio Salado and Rural. CLICK HERE to view the timetable and route map. The two similar routes are called Flash Forward and Flash Back.
There is a different route called FLASH McCallister. It goes from the Light Rail stop at Veterans Way up to Rural and Rio Salado, and then back to Rural south of Apache. That route can be viewed by CLICKING HERE
There is an entire planetary series that is also available. Orbit Earth, Orbit Jupiter, Mars, Mercury, and Venus will take you in every direction.
All the above routes intersect at the Light Rail Stop at Veterans Way, and are provided FREE – compliments of Valley Metro.