Ran indoors at the AFFC because of the poor air quality. I didn't know if I'd be able to run on that small of a track for that long, but with some music, I was able to get into a zone where I didn't much notice the passage of time. I talked with a kid getting to go on a mission off and on for the first half hour which helped to pass the time. I wore my heart rate monitor and pretty much kept my pace in the marathon range. The last ten minutes or so, I pushed the pace fairly hard and still felt good when I finished.