Originally Posted by DaveB

Good point, but as usual, it will fall mostly on deaf ears. Most people just don't understand the impacts of density altitude. Also, some tracks are just quicker or slower for no real apparent reason. I've seen this at one track I use to run at. The DA conditions would be fine (sub 1500') and my 60 foots were normal, but I was always .2 seconds and 2mph slower than the track I normally run at in Kansas City.