Just took the data from the marathon website and worked out the 5K splits (spurred by coach observing that I had not slowed down nearly as much as I might have!).
5K 28:20
10K 28:14
15K 29:35
20K 29:11
25K 30:19
30K 31:58
35K 33:30
40K 31:56
Race map is annoyingly in miles rather than kilometers, and I am too lazy to sort it out, but I can say subjectively that I walked a couple short steep hills in Manayunk (figured it was not worth letting the HR go up) and felt least good (not terrible, but not great) at the 20-mile turnaround point which comes at the end of Main Street Manayunk, I am not surprised that my slowest chunk was the 30-35K stretch - it was actually all good from there, I felt strong in the last six miles.
That sort of 10:15 mile pace I had in the 35K-40K stretch (I think I was running very steadily, I didn't walk at all during the race other than through slippery aid stations and a couple short late hills) is very comfortable for me to maintain for a long time...
Must get back to WORK, marathon musings are distracting me from my real responsibilities!!!
Good thing you need recovery time from training and events... otherwise might never get work done again!
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