Gotta Question

Have any of you raced in Colorado...My time slips say im slow, but i can keep up with gs-t's and gs-r's which at sea level in the right conditions can run high 14's and low 15's....Does any1 know the correction factor for a 70 degree night almost no humidity or wind at around 5,000ft.... with a time of 17.510 @ 80.80...If any1 can help me out that would be great