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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing
BOSTON MARATHON 2026

Seiko Kobayashi

Bib: 30221 •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 (F55-59)
#0 / 951
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
31:27
3.11 mi
Rank: #26282
Start → 5K
31:27 | 10:08/mi
10K
1:02:58
6.21 mi
Rank: #26238 (+44)
5K → 10K
31:31 | 10:09/mi
15K
1:37:10
9.32 mi
Rank: #26744 (-506)
10K → 15K
34:12 | 11:01/mi
20K
2:09:24
12.43 mi
Rank: #26516 (+228)
15K → 20K
32:14 | 10:23/mi
HALF
2:16:06
13.11 mi
Rank: #26465 (+51)
20K → HALF
6:42 | 9:50/mi
25K
2:40:56
15.53 mi
Rank: #26242 (+223)
HALF → 25K
24:50 | 10:15/mi
30K
3:14:18
18.64 mi
Rank: #25958 (+284)
25K → 30K
33:22 | 10:45/mi
20M
3:28:33
20.00 mi
Rank: #25807 (+151)
30K → 20M
14:15 | 10:30/mi
21M
3:40:11
21.00 mi
Rank: #25725 (+82)
20M → 21M
11:38 | 11:38/mi
35K
3:48:00
21.75 mi
Rank: #25672 (+53)
21M → 35K
7:49 | 10:27/mi
23M
4:02:33
23.00 mi
Rank: #25670 (+2)
35K → 23M
14:33 | 11:38/mi
24M
4:13:33
24.00 mi
Rank: #25669 (+1)
23M → 24M
11:00 | 11:00/mi
40K
4:25:35
24.85 mi
Rank: #25831 (-162)
24M → 40K
12:02 | 14:05/mi
25.2M
4:30:39
25.20 mi
Rank: #25893 (-62)
40K → 25.2M
5:04 | 14:42/mi
FINISH
4:42:30
26.22 mi
Rank: #25953 (-60)
25.2M → FINISH
11:51 | 11:38/mi
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Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time2:16:06
Pace10:23 /mi
2nd Half
Distance13.11 mi
Time2:26:24
Pace11:11 /mi
📊Positive Split: 7.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:57:4131:2710:0831:27
10:08
-
10K
6.21 mi12:29:121:02:5810:0931:31
10:09
+0:01
15K
9.32 mi13:03:241:37:1010:2634:12
11:01
+0:52
20K
12.43 mi13:35:382:09:2410:2532:14
10:23
-0:38
HALF
13.11 mi13:42:202:16:0610:236:42
9:50
-0:33
25K
15.53 mi14:07:102:40:5610:2224:50
10:15
+0:25
30K
18.64 mi14:40:323:14:1810:2633:22
10:45
+0:30
20M
20.00 mi14:54:473:28:3310:2614:15
10:30
-0:15
21M
21.00 mi15:06:253:40:1110:3011:38
11:38
+1:08
35K
21.75 mi15:14:143:48:0010:307:49
10:27
-1:11
23M
23.00 mi15:28:474:02:3310:3314:33
11:38
+1:11
24M
24.00 mi15:39:474:13:3310:3411:00
11:00
-0:38
40K
24.85 mi15:51:494:25:3510:4212:02
14:05
+3:05
25.2M
25.20 mi15:56:534:30:3910:455:04
14:42
+0:37
FINISH
26.22 mi16:08:444:42:3010:4711:51
11:38
-3:04

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

9:50 /mi

Average Pace

10:47 /mi

Slowest Pace

14:42 /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

6:42

2% of race

Time at Steady Pace

3:40:40

78% of race

Time at Slower Pace

55:08

20% of race

Average Pace: 10:46 /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 mi11:57:4131:2710:0831:27
10:08
#26282
10K
6.21 mi12:29:121:02:5810:0931:31
10:09
#26238
15K
9.32 mi13:03:241:37:1010:2634:12
11:01
#26744
20K
12.43 mi13:35:382:09:2410:2532:14
10:23
#26516
HALF
13.11 mi13:42:202:16:0610:236:42
9:50
#26465
25K
15.53 mi14:07:102:40:5610:2224:50
10:15
#26242
30K
18.64 mi14:40:323:14:1810:2633:22
10:45
#25958
20M
20.00 mi14:54:473:28:3310:2614:15
10:30
#25807
21M
21.00 mi15:06:253:40:1110:3011:38
11:38
#25725
35K
21.75 mi15:14:143:48:0010:307:49
10:27
#25672
23M
23.00 mi15:28:474:02:3310:3314:33
11:38
#25670
24M
24.00 mi15:39:474:13:3310:3411:00
11:00
#25669
40K
24.85 mi15:51:494:25:3510:4212:02
14:05
#25831
25.2M
25.20 mi15:56:534:30:3910:455:04
14:42
#25893
FINISH
26.22 mi16:08:444:42:3010:4711:51
11:38
#25953
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi26282108571085727424(Top 94%)11561(Top 92%)11561(Top 1216%)
10K6.21 mi3.10 mi26238+4410843+1410843+1426194(Top 90%)10829(Top 86%)10829(Top 1139%)
15K9.32 mi3.11 mi26744-50611146-30311146-30327424(Top 94%)11561(Top 92%)11561(Top 1216%)
20K12.43 mi3.11 mi26516+22811021+12511021+12525877(Top 89%)10671(Top 85%)10671(Top 1122%)
HALF13.11 mi0.68 mi26465+5110993+2810993+2825266(Top 87%)10367(Top 82%)10367(Top 1090%)
25K15.53 mi2.42 mi26242+22310877+11610877+11624877(Top 86%)10167(Top 81%)10167(Top 1069%)
30K18.64 mi3.11 mi25958+28410735+14210735+14224825(Top 86%)10283(Top 82%)10283(Top 1081%)
20M20.00 mi1.36 mi25807+15110673+6210673+6223844(Top 82%)9830(Top 78%)9830(Top 1034%)
21M21.00 mi1.00 mi25725+8210650+2310650+2324447(Top 84%)10220(Top 81%)10220(Top 1075%)
35K21.75 mi0.75 mi25672+5310632+1810632+1824232(Top 83%)10118(Top 80%)10118(Top 1064%)
23M23.00 mi1.25 mi25670+210645-1310645-1325622(Top 88%)10877(Top 86%)10877(Top 1144%)
24M24.00 mi1.00 mi25669+110657-1210657-1225115(Top 87%)10658(Top 85%)10658(Top 1121%)
40K24.85 mi0.85 mi25831-16210758-10110758-10127965(Top 96%)12096(Top 96%)12096(Top 1272%)
25.2M25.20 mi0.35 mi25893-6210790-3210790-3227750(Top 96%)12003(Top 95%)12003(Top 1262%)
FINISH26.22 mi1.02 mi25953-6010834-4410834-4427042(Top 93%)11659(Top 93%)11659(Top 1226%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 94%
×21
+97ft-345ft

Overall

27424

Females

11561

F55-59

11561

5K→10K

3.1 - 6.2 mi

Top 90%
×5
+79ft-138ft

Overall

26194

Females

10829

F55-59

10829

10K→15K

6.2 - 9.3 mi

Top 94%
×3
+67ft-78ft

Overall

27424

Females

11561

F55-59

11561

15K→20K

9.3 - 12.4 mi

Top 89%
×5
+106ft-86ft

Overall

25877

Females

10671

F55-59

10671

20K→HALF

12.4 - 13.1 mi

Top 87%
×2
+19ft-37ft

Overall

25266

Females

10367

F55-59

10367

HALF→25K

13.1 - 15.5 mi

Top 86%
×4
+66ft-88ft

Overall

24877

Females

10167

F55-59

10167

25K→30K

15.5 - 18.6 mi

Top 86%
×9
+181ft-148ft

Overall

24825

Females

10283

F55-59

10283

30K→20M

18.6 - 20.0 mi

Top 82%
×5
+64ft-50ft

Overall

23844

Females

9830

F55-59

9830

20M→21M

20.0 - 21.0 mi

Top 84%
×8
+106ft-24ft

Overall

24447

Females

10220

F55-59

10220

21M→35K

21.0 - 21.8 mi

Top 83%
×7
+17ft-86ft

Overall

24232

Females

10118

F55-59

10118

35K→23M

21.8 - 23.0 mi

Top 88%
×5
+23ft-63ft

Overall

25622

Females

10877

F55-59

10877

23M→24M

23.0 - 24.0 mi

Top 87%
×6
+12ft-82ft

Overall

25115

Females

10658

F55-59

10658

24M→40K

24.0 - 24.9 mi

Top 96%
×1
+6ft-20ft

Overall

27965

Females

12096

F55-59

12096

40K→25.2M

24.9 - 25.2 mi

Top 96%
×1
+13ft-16ft

Overall

27750

Females

12003

F55-59

12003

25.2M→FINISH

25.2 - 26.2 mi

Top 93%
×2
+22ft-21ft

Overall

27042

Females

11659

F55-59

11659

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1507*
Passed By
844
Net Change
+329
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#26282
5K → 10K214*170+44#26282#26238
10K → 15K28200-506#26238#26744
15K → 20K249*21+228#26744#26516
20K → HALF554+51#26516#26465
HALF → 25K229*6+223#26465#26242
25K → 30K294*10+284#26242#25958
30K → 20M1565+151#25958#25807
20M → 21M9917+82#25807#25725
21M → 35K596+53#25725#25672
35K → 23M5048+2#25672#25670
23M → 24M4443+1#25670#25669
24M → 40K10172-162#25669#25831
40K → 25.2M264-62#25831#25893
25.2M → FINISH1878-60#25893#25953
TOTALS1507*844+329

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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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