Hayden Butte is a site in Tempe, Arizona that we haven't visited yet. The site, with around 500 petroglyphs, sits right next to the Arizona State University's Sun Devils Stadium. There is a parking lot on the corner of South Mill Avenue and West 3rd Street that you can get turn-by-turn directions to by entering 'Missions Palms North Lot - Public Parking' into your driving app. (It will probably pop up before you get all that typed in.)
Included with this post is the GPS file and map that we plan to use for our first visit. If you don't want to wait for us to get around to it feel free to try the GPS file and map for yourself. With no guarantee, of course, but they most often prove valuable for us.