4mi. I had to scoot out early before cooldown to get John off to school in time. The intervals for the 17 ppl that showed up were:
1 mi warmup
200m w/100m recovery
200m w/100m recovery
800m w/200m recovery
100m w/100m recovery
100m w/100m recovery
1000m w/200 recovery
400m w/100m recovery @75%
400m w/100m recovery @80%
400m w/100m recovery @85%
600m w/100m recovery
600m w/100m recovery