It was really hot today, especially humid.  I started out at Stone Mountain Park at 8 am, and finished just after 10.  I did six laps of the 5 mile course with 2250 feet of climbing.  It was a good 'hill repeat' workout.  It is nice to ride at the park on weekdays, because there is very little traffic.  I think the weight room work is helping because it felt as if my endurance for climbing is improving.