The Waterfall Canyon Petroglyphs are located in the White Tank Mountain Regional Park near Phoenix, Arizona. From Waddell head west on W Olive Avenue for 2.95 miles. At that point W Olive becomes W White Tank Mountain Road. Continue for just under 2 miles and turn left onto N Waterfall Canyon Road. In one half mile turn left onto Ramada Way and continue 1,000 feet to the parking area. The petroglyphs are less than 300 feet northwest of the trailhead.
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.