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BOSTON MARATHON 2023

Chiemi Yamamoto

Bib: 23813•F

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F60-64)
#0 / 527
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
30:03
Rank: #22587
Start → 5K
9:40/mi
30:03 split
10K· 6.21 mi
1:03:38
Rank: #24142 (-1555)
5K → 10K
10:49/mi
33:35 split
15K· 9.32 mi
1:34:37
Rank: #23902 (+240)
10K → 15K
9:58/mi
30:59 split
20K· 12.43 mi
2:09:54
Rank: #24330 (-428)
15K → 20K
11:21/mi
35:17 split
Half· 13.11 mi
2:16:43
Rank: #24278 (+52)
20K → Half
9:59/mi
6:49 split
25K· 15.53 mi
2:41:49
Rank: #24007 (+271)
Half → 25K
10:21/mi
25:06 split
30K· 18.64 mi
3:16:27
Rank: #23886 (+121)
25K → 30K
11:09/mi
34:38 split
20M
3:32:28
Rank: #23896 (-10)
30K → 20M
11:47/mi
16:01 split
21M
3:45:00
Rank: #23883 (+13)
20M → 21M
12:32/mi
12:32 split
35K· 21.75 mi
3:52:30
Rank: #23807 (+76)
21M → 35K
10:01/mi
7:30 split
23M
4:06:26
Rank: #23757 (+50)
35K → 23M
11:08/mi
13:56 split
24M
4:16:46
Rank: #23680 (+77)
23M → 24M
10:20/mi
10:20 split
40K· 24.85 mi
4:25:51
Rank: #23615 (+65)
24M → 40K
10:37/mi
9:05 split
25.2M
4:29:57
Rank: #23602 (+13)
40K → 25.2M
11:53/mi
4:06 split
Finish· 26.22 mi
4:40:59
Rank: #23619 (-17)
25.2M → Finish
10:50/mi
11:02 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:16:43
Pace10:26 /mi
2nd Half
Distance13.11 mi
Time2:24:16
Pace11:00 /mi
📊Positive Split: 5.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:26:1630:039:4030:03
9:40
-
10K
6.21 mi11:59:511:03:3810:1433:35
10:49
+1:09
15K
9.32 mi12:30:501:34:3710:0930:59
9:58
-0:51
20K
12.43 mi13:06:072:09:5410:2735:17
11:21
+1:23
Half
13.11 mi13:12:562:16:4310:266:49
9:59
-1:22
25K
15.53 mi13:38:022:41:4910:2525:06
10:21
+0:22
30K
18.64 mi14:12:403:16:2710:3234:38
11:09
+0:48
20M
20.00 mi14:28:413:32:2810:3716:01
11:47
+0:38
21M
21.00 mi14:41:133:45:0010:4312:32
12:32
+0:45
35K
21.75 mi14:48:433:52:3010:417:30
10:01
-2:31
23M
23.00 mi15:02:394:06:2610:4313:56
11:08
+1:07
24M
24.00 mi15:12:594:16:4610:4210:20
10:20
-0:48
40K
24.85 mi15:22:044:25:5110:429:05
10:37
+0:17
25.2M
25.20 mi15:26:104:29:5710:434:06
11:53
+1:16
Finish
26.22 mi15:37:124:40:5910:4311:02
10:50
-1:03

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

9:40 /mi

Average Pace

10:43 /mi

Slowest Pace

12:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:50:47

39% of race

Time at Steady Pace

1:42:16

36% of race

Time at Slower Pace

1:07:56

24% of race

Average Pace: 10:43 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:26:1630:039:4030:03
9:40
#22587
10K
6.21 mi11:59:511:03:3810:1433:35
10:49
#24142
15K
9.32 mi12:30:501:34:3710:0930:59
9:58
#23902
20K
12.43 mi13:06:072:09:5410:2735:17
11:21
#24330
Half
13.11 mi13:12:562:16:4310:266:49
9:59
#24278
25K
15.53 mi13:38:022:41:4910:2525:06
10:21
#24007
30K
18.64 mi14:12:403:16:2710:3234:38
11:09
#23886
20M
20.00 mi14:28:413:32:2810:3716:01
11:47
#23896
21M
21.00 mi14:41:133:45:0010:4312:32
12:32
#23883
35K
21.75 mi14:48:433:52:3010:417:30
10:01
#23807
23M
23.00 mi15:02:394:06:2610:4313:56
11:08
#23757
24M
24.00 mi15:12:594:16:4610:4210:20
10:20
#23680
40K
24.85 mi15:22:044:25:5110:429:05
10:37
#23615
25.2M
25.20 mi15:26:104:29:5710:434:06
11:53
#23602
Finish
26.22 mi15:37:124:40:5910:4311:02
10:50
#23619
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF60-64Seg. OverallSeg. FemalesSeg. F60-64
5K3.11 mi3.11 mi225879178917823457(Top 88%)9585(Top 84%)9585(Top 1819%)
10K6.21 mi3.10 mi24142-15559967-7899967-78925200(Top 95%)10548(Top 92%)10548(Top 2002%)
15K9.32 mi3.11 mi23902+2409835+1329835+13223457(Top 88%)9585(Top 84%)9585(Top 1819%)
20K12.43 mi3.11 mi24330-42810081-24610081-24625068(Top 94%)10519(Top 92%)10519(Top 1996%)
Half13.11 mi0.68 mi24278+5210053+2810053+2823272(Top 87%)9502(Top 83%)9502(Top 1803%)
25K15.53 mi2.42 mi24007+2719900+1539900+15322939(Top 86%)9359(Top 82%)9359(Top 1776%)
30K18.64 mi3.11 mi23886+1219853+479853+4723340(Top 88%)9650(Top 84%)9650(Top 1831%)
20M20.00 mi1.36 mi23896-109864-119864-1123935(Top 90%)10043(Top 88%)10043(Top 1906%)
21M21.00 mi1.00 mi23883+139874-109874-1023501(Top 88%)9814(Top 86%)9814(Top 1862%)
35K21.75 mi0.75 mi23807+769835+399835+3921377(Top 80%)8707(Top 76%)8707(Top 1652%)
23M23.00 mi1.25 mi23757+509820+159820+1522606(Top 85%)9386(Top 82%)9386(Top 1781%)
24M24.00 mi1.00 mi23680+779788+329788+3221648(Top 81%)8920(Top 78%)8920(Top 1693%)
40K24.85 mi0.85 mi23615+659757+319757+3121541(Top 81%)8915(Top 78%)8915(Top 1692%)
25.2M25.20 mi0.35 mi23602+139751+69751+622324(Top 84%)9302(Top 81%)9302(Top 1765%)
Finish26.22 mi1.02 mi23619-179771-209771-2023665(Top 89%)9994(Top 87%)9994(Top 1896%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 88%
×21story building
+97ft-345ft

Overall

23457

Females

9585

F60-64

9585

5K→10K

3.1 - 6.2 mi

Top 95%
×5story building
+79ft-138ft

Overall

25200

Females

10548

F60-64

10548

10K→15K

6.2 - 9.3 mi

Top 88%
×3story building
+67ft-78ft

Overall

23457

Females

9585

F60-64

9585

15K→20K

9.3 - 12.4 mi

Top 94%
×5story building
+106ft-86ft

Overall

25068

Females

10519

F60-64

10519

20K→Half

12.4 - 13.1 mi

Top 87%
×2story building
+19ft-37ft

Overall

23272

Females

9502

F60-64

9502

Half→25K

13.1 - 15.5 mi

Top 86%
×4story building
+66ft-88ft

Overall

22939

Females

9359

F60-64

9359

25K→30K

15.5 - 18.6 mi

Top 88%
×9story building
+181ft-148ft

Overall

23340

Females

9650

F60-64

9650

30K→20M

18.6 - 20.0 mi

Top 90%
×5story building
+64ft-50ft

Overall

23935

Females

10043

F60-64

10043

20M→21M

20.0 - 21.0 mi

Top 88%
×8story building
+106ft-24ft

Overall

23501

Females

9814

F60-64

9814

21M→35K

21.0 - 21.8 mi

Top 80%
×7story building
+17ft-86ft

Overall

21377

Females

8707

F60-64

8707

35K→23M

21.8 - 23.0 mi

Top 85%
×5story building
+23ft-63ft

Overall

22606

Females

9386

F60-64

9386

23M→24M

23.0 - 24.0 mi

Top 81%
×6story building
+12ft-82ft

Overall

21648

Females

8920

F60-64

8920

24M→40K

24.0 - 24.9 mi

Top 81%
×1story
+6ft-20ft

Overall

21541

Females

8915

F60-64

8915

40K→25.2M

24.9 - 25.2 mi

Top 84%
×1story
+13ft-16ft

Overall

22324

Females

9302

F60-64

9302

25.2M→Finish

25.2 - 26.2 mi

Top 89%
×2story building
+22ft-21ft

Overall

23665

Females

9994

F60-64

9994

Passing Analysis

Category:
Athletes Passed
1244
Passed By
2276
Net Change
-1032
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22587
5K → 10K61561-1555#22587#24142
10K → 15K27434+240#24142#23902
15K → 20K23451-428#23902#24330
20K → Half597+52#24330#24278
Half → 25K2765+271#24278#24007
25K → 30K17251+121#24007#23886
30K → 20M4050-10#23886#23896
20M → 21M5643+13#23896#23883
21M → 35K771+76#23883#23807
35K → 23M6616+50#23807#23757
23M → 24M836+77#23757#23680
24M → 40K716+65#23680#23615
40K → 25.2M174+13#23615#23602
25.2M → Finish2441-17#23602#23619
TOTALS12442276-1032
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing