My wife and I did the northern route from 100th South again. Another 2 miles. I took only one rest stop, at the turnaround point, and I felt stronger than I did a few days ago. We were late going out (about 11 am), but there was still a reasonable amount of shade, and I ran both sides of the path to get the shady spots. I drank two cups of water during my run, plus a nice drink at the fountain at the parking lot.
The following picture of shade on the Jordan River Parkway was taken from the web. The picture shows the path just south of the 106th tunnel, near where I run.