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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing
BOSTON MARATHON 2026

Kimiko Shirai

Bib: 30438 •F •Age: N/A

Boston Marathon logo
0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Gender (Female)
#0 / 12578
Masters (Masters Women)
#0 / 6862
Age Group (F75-79)
#0 / 14
Race Day Weather
51°/41°F
overcast clouds

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K
36:59
3.11 mi
Rank: #28762
Start → 5K
36:59 | 11:55/mi
10K
1:17:23
6.21 mi
Rank: #28890 (-128)
5K → 10K
40:24 | 13:01/mi
15K
1:57:10
9.32 mi
Rank: #28882 (+8)
10K → 15K
39:47 | 12:49/mi
20K
2:38:12
12.43 mi
Rank: #28861 (+21)
15K → 20K
41:02 | 13:13/mi
HALF
2:46:51
13.11 mi
Rank: #28850 (+11)
20K → HALF
8:39 | 12:42/mi
25K
3:20:42
15.53 mi
Rank: #28836 (+14)
HALF → 25K
33:51 | 13:58/mi
30K
4:05:44
18.64 mi
Rank: #28828 (+8)
25K → 30K
45:02 | 14:30/mi
20M
4:26:31
20.00 mi
Rank: #28830 (-2)
30K → 20M
20:47 | 15:19/mi
21M
4:42:09
21.00 mi
Rank: #28824 (+6)
20M → 21M
15:38 | 15:38/mi
35K
4:52:55
21.75 mi
Rank: #28825 (-1)
21M → 35K
10:46 | 14:24/mi
23M
5:11:26
23.00 mi
Rank: #28840 (-15)
35K → 23M
18:31 | 14:48/mi
24M
5:26:22
24.00 mi
Rank: #28851 (-11)
23M → 24M
14:56 | 14:56/mi
40K
5:38:50
24.85 mi
Rank: #28845 (+6)
24M → 40K
12:28 | 14:35/mi
25.2M
5:44:13
25.20 mi
Rank: #28846 (-1)
40K → 25.2M
5:23 | 15:37/mi
FINISH
5:58:29
26.22 mi
Rank: #28853 (-7)
25.2M → FINISH
14:16 | 14:00/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time2:46:51
Pace12:44 /mi
2nd Half
Distance13.11 mi
Time3:11:38
Pace14:38 /mi
📊Positive Split: 14.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi12:03:3336:5911:5536:59
11:55
-
10K
6.21 mi12:43:571:17:2312:2840:24
13:01
+1:06
15K
9.32 mi13:23:441:57:1012:3539:47
12:49
-0:12
20K
12.43 mi14:04:462:38:1212:4441:02
13:13
+0:24
HALF
13.11 mi14:13:252:46:5112:448:39
12:42
-0:31
25K
15.53 mi14:47:163:20:4212:5633:51
13:58
+1:16
30K
18.64 mi15:32:184:05:4413:1145:02
14:30
+0:32
20M
20.00 mi15:53:054:26:3113:2020:47
15:19
+0:49
21M
21.00 mi16:08:434:42:0913:2715:38
15:38
+0:19
35K
21.75 mi16:19:294:52:5513:2910:46
14:24
-1:14
23M
23.00 mi16:38:005:11:2613:3318:31
14:48
+0:24
24M
24.00 mi16:52:565:26:2213:3614:56
14:56
+0:08
40K
24.85 mi17:05:245:38:5013:3812:28
14:35
-0:21
25.2M
25.20 mi17:10:475:44:1313:405:23
15:37
+1:02
FINISH
26.22 mi17:25:035:58:2913:4114:16
14:00
-1:37

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

📈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

11:55 /mi

Average Pace

13:41 /mi

Slowest Pace

15:38 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

2:46:51

47% of race

Time at Steady Pace

2:29:50

42% of race

Time at Slower Pace

41:48

12% of race

Average Pace: 13:40 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi12:03:3336:5911:5536:59
11:55
#28762
10K
6.21 mi12:43:571:17:2312:2840:24
13:01
#28890
15K
9.32 mi13:23:441:57:1012:3539:47
12:49
#28882
20K
12.43 mi14:04:462:38:1212:4441:02
13:13
#28861
HALF
13.11 mi14:13:252:46:5112:448:39
12:42
#28850
25K
15.53 mi14:47:163:20:4212:5633:51
13:58
#28836
30K
18.64 mi15:32:184:05:4413:1145:02
14:30
#28828
20M
20.00 mi15:53:054:26:3113:2020:47
15:19
#28830
21M
21.00 mi16:08:434:42:0913:2715:38
15:38
#28824
35K
21.75 mi16:19:294:52:5513:2910:46
14:24
#28825
23M
23.00 mi16:38:005:11:2613:3318:31
14:48
#28840
24M
24.00 mi16:52:565:26:2213:3614:56
14:56
#28851
40K
24.85 mi17:05:245:38:5013:3812:28
14:35
#28845
25.2M
25.20 mi17:10:475:44:1313:405:23
15:37
#28846
FINISH
26.22 mi17:25:035:58:2913:4114:16
14:00
#28853
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF75-79Seg. OverallSeg. FemalesSeg. F75-79
5K3.11 mi3.11 mi28762123991239928770(Top 99%)12414(Top 99%)12414(Top 88671%)
10K6.21 mi3.10 mi28890-12812491-9212491-9228931(Top 100%)12522(Top 100%)12522(Top 89443%)
15K9.32 mi3.11 mi28882+812484+712484+728770(Top 99%)12414(Top 99%)12414(Top 88671%)
20K12.43 mi3.11 mi28861+2112472+1212472+1228704(Top 99%)12383(Top 98%)12383(Top 88450%)
HALF13.11 mi0.68 mi28850+1112467+512467+528612(Top 99%)12340(Top 98%)12340(Top 88143%)
25K15.53 mi2.42 mi28836+1412456+1112456+1128679(Top 99%)12380(Top 98%)12380(Top 88429%)
30K18.64 mi3.11 mi28828+812459-312459-328606(Top 99%)12362(Top 98%)12362(Top 88300%)
20M20.00 mi1.36 mi28830-212462-312462-328692(Top 99%)12413(Top 99%)12413(Top 88664%)
21M21.00 mi1.00 mi28824+612460+212460+228421(Top 98%)12294(Top 98%)12294(Top 87814%)
35K21.75 mi0.75 mi28825-112463-312463-328521(Top 98%)12361(Top 98%)12361(Top 88293%)
23M23.00 mi1.25 mi28840-1512471-812471-828575(Top 98%)12386(Top 98%)12386(Top 88471%)
24M24.00 mi1.00 mi28851-1112480-912480-928702(Top 99%)12452(Top 99%)12452(Top 88943%)
40K24.85 mi0.85 mi28845+612476+412476+428263(Top 97%)12252(Top 97%)12252(Top 87514%)
25.2M25.20 mi0.35 mi28846-112479-312479-328265(Top 97%)12270(Top 98%)12270(Top 87643%)
FINISH26.22 mi1.02 mi28853-712481-212481-228665(Top 99%)12443(Top 99%)12443(Top 88879%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 99%
×21
+97ft-345ft

Overall

28770

Females

12414

F75-79

12414

5K→10K

3.1 - 6.2 mi

Top 100%
×5
+79ft-138ft

Overall

28931

Females

12522

F75-79

12522

10K→15K

6.2 - 9.3 mi

Top 99%
×3
+67ft-78ft

Overall

28770

Females

12414

F75-79

12414

15K→20K

9.3 - 12.4 mi

Top 99%
×5
+106ft-86ft

Overall

28704

Females

12383

F75-79

12383

20K→HALF

12.4 - 13.1 mi

Top 99%
×2
+19ft-37ft

Overall

28612

Females

12340

F75-79

12340

HALF→25K

13.1 - 15.5 mi

Top 99%
×4
+66ft-88ft

Overall

28679

Females

12380

F75-79

12380

25K→30K

15.5 - 18.6 mi

Top 99%
×9
+181ft-148ft

Overall

28606

Females

12362

F75-79

12362

30K→20M

18.6 - 20.0 mi

Top 99%
×5
+64ft-50ft

Overall

28692

Females

12413

F75-79

12413

20M→21M

20.0 - 21.0 mi

Top 98%
×8
+106ft-24ft

Overall

28421

Females

12294

F75-79

12294

21M→35K

21.0 - 21.8 mi

Top 98%
×7
+17ft-86ft

Overall

28521

Females

12361

F75-79

12361

35K→23M

21.8 - 23.0 mi

Top 98%
×5
+23ft-63ft

Overall

28575

Females

12386

F75-79

12386

23M→24M

23.0 - 24.0 mi

Top 99%
×6
+12ft-82ft

Overall

28702

Females

12452

F75-79

12452

24M→40K

24.0 - 24.9 mi

Top 97%
×1
+6ft-20ft

Overall

28263

Females

12252

F75-79

12252

40K→25.2M

24.9 - 25.2 mi

Top 97%
×1
+13ft-16ft

Overall

28265

Females

12270

F75-79

12270

25.2M→FINISH

25.2 - 26.2 mi

Top 99%
×2
+22ft-21ft

Overall

28665

Females

12443

F75-79

12443

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
179
Passed By
270
Net Change
-91
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#28762
5K → 10K4132-128#28762#28890
10K → 15K2315+8#28890#28882
15K → 20K3514+21#28882#28861
20K → HALF110+11#28861#28850
HALF → 25K2511+14#28850#28836
25K → 30K2618+8#28836#28828
30K → 20M1012-2#28828#28830
20M → 21M148+6#28830#28824
21M → 35K67-1#28824#28825
35K → 23M318-15#28825#28840
23M → 24M011-11#28840#28851
24M → 40K137+6#28851#28845
40K → 25.2M23-1#28845#28846
25.2M → FINISH714-7#28846#28853
TOTALS179270-91
📊

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

📈Position Graph

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🎨Heatmap Timeline

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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