It is amazing how much heat and humidity can make a difference during a run. Last weekend in Holland it was 55 degrees when I started my run and I don't know what the humidity was but it couldn't have been very high. Today in West Lafayette, it was 70 degrees when I left at 6:45 and 57% humidity (which is not super high I know but I'm trying to prove a point). Holland - 12.05 miles, 1:46:33, 8:50 avg. min/mi Mile 1 - 9:07 Mile 2 - 8:57 Mile 3 - 8:53 Mile 4 - 8:47 Mile 5 - 8:48 Mile 6 - 8:46 Mile 7 - 9:46 (water break) Mile 8 - 8:57 Mile 9 - 8:49 Mile 10 - 8:41 Mile 11 - 8:25 Mile 12 - 8:10 West Lafayette - 12.51 miles, 1:56:06, 9:17 avg. min/mi Mile 1 - 9:23 Mile 2 - 9:06 Mile 3 - 9:15 Mile 4 - 8:44 Mile 5 - 8:59 Mile 6 - 9:05 Mile 7 - 9:56 (water break) Mile 8 - 9:06 Mile 9 - 9:16 Mile 10 - 9:35 Mile 11 - 9:34 Mile 12 - 9:13 An alternate theory is that I always run better in Holland because I love running in Holland.