A good 5-mile rest run

I ran 5 miles on the Jordan River Parkway and had a great run. I was late going out, and the shade temperature was in the mid to high 80s (F). I felt good during the run. While going out, I ran at approximately 12 minutes/mile, and coming back I ran about 11:40 minutes/mile. My wakeup HR was 49, but I only had 4 hours sleep last night. I expect that that lack of sleep will affect my running tomorrow or Wednesday.