Ran in the 2012 SF Marathon - but only the 1st half marathon. Finished in 2h01m10s. Better than I expected going into the race, since I haven't been running much. But not as good as I wanted to run. I wanted to break 2hours. The golden gate bridge portion of the race slowed me down too much. It was too crowded, and I was dodging people left and right trying to go by. The adrenaline from racing and the motrin before the race seemed to help a lot, since I was not feeling that much pain in my foot or knees.
I may have to try running in a half marathon event, rather than by myself to see how I would do.