Here is an update:
Women
Mile 1: 5:55 Deba starts pushing after mile mark, then Baysa takes over just before mile 2
Mile 2: 5:36 (11:31) Baysa leading up front
Mile 3: 5:37 (17:08)
5K: 17:45 Baysa. 14 women in lead group. Deba and Linden sharing lead after 5k.
Mile 4: 5:32 (22:41) Linden takes lead to push pace but after pace increases, she backs off a little and lets Baysa take over again. But then Linden starts pushing again.
Mile 5: 5:44 (28:25) After seeing split, Linden starts pushing in earnest. Deba dropping off.
Mile 6: 5:21 (33:46) Fastest of the race
10K: 34:58 (17:13) They’ve picked it up and with Linden in front, they’re now on 2:27:32 pace. Lead pack is 13, Deba still there at the back.
Linden still pushing, dumping water on her head at aid stations.
Mile 7: 5:35 (39:22) Linden still leading the way.
Mile 8: 5:27 (44:49) Still Linden
Mile 9: 5:20 (50:09) Linden leading. 2:26:05 marathon pace. Desi Linden is doing what she needs to do: upping the pace. Lead pack is stringing out with a couple women dropping off.
15K: 51:54 (16:57) 11 women in lead pack. Now dropping to 9 with Nukuri struggling to hold on as number 10. Deba and Baysa have both been dropped.
Mile 10: 5:26 (55:35) 10 women. Nukuri holding on at back.
Mile 11: 5:33 (1:01:09)
Mile 12: 5:17 (1:06:26) Chepkirui and Nukuri both dropped after mile 12.
20K: 1:08:59 (17:05) Aga dropping back and it’s down to seven.
Mile 13: 5:29 (1:11:55)
Half: 1:12:33 Hasay and Linden are the only women dumping water on top of their heads
Mile 14: 5:23 (1:17:18) Linden steps back, Kipketer now leading.
Mile 15: 5:39 (1:22:57) Kipketer, Hasay, Tsegay and Chelimo now pushing. Kiplagat and Cherono dropping behind, as is Linden
25K: 1:25:50 (17:51) Linden is three seconds off the back.
Mile 16: 5:13 (1:28:10) Lead group is six. Kipketer continuing to push. Gap to Linden is widening as they go on uphill over Rte 128 and approach Newton Hills. Similar to last year -- Linden careful not to push too hard as they go up the hills. Kosgei now getting dropped too.
Hasay looking good as she's part of a five-women lead pack as women enter Newton Hills. Linden was hanging back but now she's basically caught them and is running on right side of the road. I know Linden paid close attention to 2016 race, where leaders were too aggressive right before the hills. Looks like she also wanted to be cautious.
Linden has now caught lead pack and it's six women (Kipketer, Hasay, Cherono, CHelimo and Kiplagat).
Largest gap to Linden was probably around 9 seconds at 16 miles.
Mile 17: 5:32 (1:33:43) Hasay right there with the other five. As they run during mile 18, Linden now hanging back again letting a small gap form. Kipketer also falling off as Chelimo pushing up front. Linden now about 10 seconds back.
Mile 18: 5:29. It’s Kiplagat and Chelimo leading, Hasay and CHerono tucked in behind and Kipketer, who was dropped earlier, just hanging on at the back. Linden is 10 seconds back.
Men
Mile 1: 4:52
Mile 2: 5:01 (9:53) Sefir starts pushing a little after 2 miles and strings out a little but still a lot of guys there.
Mile 3: 4:59 (14:53)
5K: 15:23 25 men in lead group
Mile 4: 4:46 (19:40)
Mile 5: 4:58 (24:38) Mutai the one doing the pushing
Mile 6: 4:47 (29:25) Lead pack is splitting in two, with Rupp and Meb in lead group with Ward and Puskedra dropping back.
10K: 30:26 (15:03)
Mile 7: 4:47 (34:13)
Mile 8: 4:55 (39:08) Emmanuel Mutai still leading
Mile 9: 4:58 (44:07)
15K: 45:43 (15:17)
Mile 10: 5:04 (49:11) Puskedra, Ward and others have caught back up to top men
Mile 11: 5:02 (54:14) Lemi to the front after 11 miles and the front groupis separating again. Rupp only American up there. Meb, Ward and Puskedra all dropped and kind of together. Now during mile 13 Abdi is moving back to front along with some of the other men.
Mile 12: 4:45 (59:03) Abdi now into lead in scream tunnel
20K: 1:01:15 (15:32)
Mile 13: 4:58 (1:04:01)
79 degrees at 20K mark.
Half: 1:04:35. 12 guys in lead pack.
Mile 14: 4:51 (1:08:54)