Perry Tank Canyon is a 10 mile out and back trail located near Mayer, AZ. The trail is only recommended for very experienced adventurers and primarily used for hiking.
Access to the Agua Fria River is via the Badger Springs trailhead; however, once you hit the river, there is no longer any maintained trail. Instead, you will just continue southward through the canyon. Depending on the time of year and the amount of recent rainfall, the river could be little more than a trickle, or it could be waist-deep. There will be a significant amount of bouldering, and you'll need to watch out for thorn bushes and cacti. Wearing long pants to help avoid being stuck. You will need to cross the river multiple times due to obstructions. At Perry Tank Canyon, you may turn off the Agua Fria and continue east before turning around and exiting the way you came. If you see a large dilapidated pipe along the Agua Fria River, that's a water intake pipe from the abandoned Richinbar Mine. There is a separate trail along the plateau to reach the mine.