I had both my Garmin and my phone Nike+ app going, and both were initially accurate, but then seemed to have difficulty keeping a steady lock on my pace. At times they differed by more than a minute per mile (about 30s in opposite directions) and it was really difficult to be confident that I was maintaining a good pace. I ultimately started using my heart rate as the arbiter. Running on the lower deck of the Queensboro Bridge was the final straw for my devices. The app went to about .5 mile optimistic and the Garmin to .2 mile pessimistic.
During mile 6, my right knee started to hurt; surprising because I haven't had any knee pain in forever, and certainly not after six miles. It stayed at a minor level, though, and I was able to ignore it. At mile 17, though, my right calf cramped up. I don't think I've ever had this happen in nearly five years of running. This dropped my pace by about a minute, but I kept at it and even felt it subside somewhat around 20 and had hope that I could at least get back on track to finish under 4 hours. That hope lasted about a mile. The cramp was joined by pain in my right foot, and I dropped to around 11 minute miles for 22 and 23. In the 23rd mile, I started to walk some, and then run again, but that soon became just walking. Mile 24 took about 15 minutes, followed by 18 minutes for 25 as my walk became more of a hobble, and then 19+ for the final mile. I couldn't even jog across the finish line. My time ended up about 117% of my target.
I would sum it up in one word: Humbling.
Positives: I finished! I met my fundraising goal for the charity. I got to see some good friends and a friend I hadn't seen since college.
The people of NYC are pretty amazing.
PS: When I crossed the finish line, the Garmin had apparently gotten back on track, and read 26.22 miles.