Temp -> Steady -> UGH

The plan was to get in a tempo run on the trail today. I went to run shortly after arriving in Austin from BOS around 2pm CDT. It was a little warmer at home than in the NE, and the results of my run certainly reflected the diff in temp. I had thought I would be able to run 605s no problem. Boy was I wrong. I got in like a 4 mile warm-up, 4 miles at temp/steady pace, and a 1 mile cool down. I wanted to stop after each mile of the the tempo run, but forced myself to keep going. My splits were something like this: 622, 632, 615, and 624. I guess the good thing is there is nowhere to go but up from here...I hope. :-)