Dan, it's pretty easy to get to, but anyone who has not taken the drive may want to consider taking the "scenic" route around the West side of Tucson through the Saguaro National Monument. I-10 to Ina road, West to Wade Rd. which turns into Picture Rocks Rd. (nice winding road through the Monument), South on Sandario Rd. to Mile Wide Rd. which turns into Kinney (winding road through the Monument again), ending at the light at Ajo. Either that or take I-19 to Ajo straight shot....