The eastern section of Saguaro National Park was not far from our rental house when we were in Tucson in June. We got up early and headed over before the day got too hot. There is a loop to drive around that climbs a little ways into the Rincon Mountains.
The nature trail and lookout from some rocks were along the drive but we stopped at most of the turnout points as well. The high point of the nature trail was finding the cicada that was singing in the tree beside the trail. The saguaros were past the peak flowering but that made it even better because we were able to see the fruits in various stages of ripeness. Looking down into the canyon from one of the higher turnout points showed the deep erosion from the water pouring down from the mountains although it was very dry when we were there since the monsoons had not started. The bright green of the lichen on some of the rocks was starting; most of the other desert plants are a duller shade.
Enjoy the slide show of the park below!