In the morning I suggested that we ride the AZT south out of Colossal Cave past I-10 and as far as we could. Lots of good singletrack has been built out that way in the last couple years, and Gary is an AZT enthusiast, so he was all for it.
I'll just let pictures talk:
Here are some that I took many years ago from inside Colossal Cave:
It was an excellent Day 2. But I was ready to see some Tucson riding I'd never seen before. So that was next on the agenda. Tucson Mountain Park.