We had 9 this week including a visitor from the Chicago area (Jeff) who is in town to visit his family. He took both sprints. He's very fast.
The group did two rounds of laps. First was 10 laps and second was 15. Each lap is around 1 mile. The average speed was 25 mph for both set of laps. It was tough, but great training for cross which is creepin' up around the corner.