4 or 5 Miles on the Treadmill X 2

On Tues and Wed of this week I ran on the treadmill at the Herndon Community Center.  Tues was for High Intensity Interval Training (HIIT) and on Wed I ran the hill program.  Each day was 4 or 5 miles (I didn't really pay attention enough to remember).  In general I felt good and they were good workouts (although on the treadmill's hill program I should chose a harder level than Level 8).