Fartleks on the Treadmill

Which isn't as smelly as it sounds. Kind of cool and drizzly this afternoon, which means a treadmill session. Ran 5.5 miles in all at 7 mph during non-fartlek times and 9 mph during my 1-2-3-2-1 fartleks. Tomorrow will be a day off before a big run on Saturday. Which might also be on the treadmill, darn it.