Karchner Caverns is pretty cool. If you're trying to wear them out stop and make them climb Picacho Peak. It's right off the interstate.
Didn't go to the peak. Just the saddle. By the time we got to that point and looked at how far it was still to the peak, I figured we were good.
Strange enough I was at Picacho Peak earlier today on our way down to go check out Ruby, AZ abandoned mining town.
A friend was camping at the KOA right up the road. I've hiked that a few times over the years, Perfect weather yesterday for it.