My race plan was to go out slightly slower than Berlin for the 1st half, about 5:54-5:56 pace, and then slightly increase the pace later in the race if I was feeling good. I did exactly that. I reached 10K in 36:54 (5:56 pace), 15K in 55:05 (5:55 pace) and the halfway mark in 1:17:16 (5:54 pace). I think what went wrong for me is that I increased the pace a little too much following the halfway mark. I ran miles 14-18 at 5:56, 5:52, 5:46, 5:51, and 5:50 pace. At 20 miles, my time was 1:57:57 (5:54 pace and on track for a 2:34 marathon). Not long after I hit the 20M marker, the legs started to feel like bricks. No more sub-6:00 pace for me. I ran 6:10-6:35 pace for miles 21-23. I told myself that if I can just hold 6:30 pace for the last 3 miles than I could still salvage a decent marathon. Of course that didn't happen. I struggled through the last 3.2 miles in 24.15 (7:35 pace) and finished with my slowest time since 2005 (not including Grandmas which I did as a long run). I'm still very happy with my overall race despite the substandard time. Here are my splits:
Distance / Time / Split
5K 18:16
10K 36:54 (18:38)
15K 55:05 (18:11)
20K 1:13:15 (18:10)
Half 1:17:16
25K 1:31:28 (18:13)
30K 1:49:42 (18:14)
35K 2:09:02 (19:20)
40K 2:30:58 (21:56)
Finish 2:41:33
It's now time to rest and fully recover from 4 marathons in a year's period (Oct '08 - Oct '09). No running for at least a full week, maybe two.
Amsterdam Marathon (19Oct08) 2:35:37
Hamburg Marathon (26Apr09) 2:34:33
Berlin Marathon (20Sep09) 2:34:06
Marine Corps Marathon (25Oct09) 2:41:33