I needed to do the Bull Pasture/Estes Canyon Loop hike that is in the book "100 Classic Hikes in Arizona". Once there and at the Visitor Center I saw that you could actually summit Mount Ajo. The Ranger told me it would take 7.5 hours or so to complete and that he just did it Monday. It was now a little after 12:30 and I had to drive 30 minutes to the trail head. Once I hit the Bull Pasture I knew I could most likely make it up and back before the sun went down. The route sometimes gets faint but isn't terribly hard to follow. I made it to the top in an hour and 38 minutes. Basically it felt like doing a hike similar to the Flatiron but a little longer.
The views up top were incredible and I would suggest this hike to anyone who doesn't mind the drive. An additional bonus was how green the desert was. They told me at the Visitor Center that they had good rains in November. The results of which were clearly evident. On the way out I took the Estes-Canyon part of the loop which is about a half mile longer than the Bull Pasture route. The way down also took me an hour and 38 minutes. It was longer but didn't have the climb.