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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing
BOSTON MARATHON 2026

Sumie Yamakawa

Bib: 21871 •F •Age: N/A

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Boston Marathon logo
0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Top 36%
Gender (Female)
#0 / 12578
Top 20%
Masters (Masters Women)
#0 / 6862
Top 7%
Age Group (F45-49)
#0 / 1786
Top 7%
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
24:02
3.11 mi
Rank: #14868
Start → 5K
24:02 | 7:45/mi
10K
47:35
6.21 mi
Rank: #14240 (+628)
5K → 10K
23:33 | 7:35/mi
15K
1:10:57
9.32 mi
Rank: #13775 (+465)
10K → 15K
23:22 | 7:32/mi
20K
1:34:07
12.43 mi
Rank: #13220 (+555)
15K → 20K
23:10 | 7:28/mi
HALF
1:39:12
13.11 mi
Rank: #13181 (+39)
20K → HALF
5:05 | 7:28/mi
25K
1:57:04
15.53 mi
Rank: #12702 (+479)
HALF → 25K
17:52 | 7:23/mi
30K
2:20:15
18.64 mi
Rank: #12069 (+633)
25K → 30K
23:11 | 7:28/mi
20M
2:30:20
20.00 mi
Rank: #11777 (+292)
30K → 20M
10:05 | 7:26/mi
21M
2:37:54
21.00 mi
Rank: #11463 (+314)
20M → 21M
7:34 | 7:34/mi
35K
2:43:24
21.75 mi
Rank: #11362 (+101)
21M → 35K
5:30 | 7:22/mi
23M
2:52:33
23.00 mi
Rank: #11084 (+278)
35K → 23M
9:09 | 7:19/mi
24M
2:59:34
24.00 mi
Rank: #10809 (+275)
23M → 24M
7:01 | 7:01/mi
40K
3:05:46
24.85 mi
Rank: #10647 (+162)
24M → 40K
6:12 | 7:16/mi
25.2M
3:08:33
25.20 mi
Rank: #10607 (+40)
40K → 25.2M
2:47 | 8:05/mi
FINISH
3:16:02
26.22 mi
Rank: #10563 (+44)
25.2M → FINISH
7:29 | 7:21/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st Half
via HALF
Distance13.11 mi
Time1:39:12
Pace7:35 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:36:50
Pace7:24 /mi
📊Negative Split: 2.4% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:25:0924:027:4524:02
7:45
-
10K
6.21 mi11:48:4247:357:4023:33
7:35
-0:10
15K
9.32 mi12:12:041:10:577:3723:22
7:32
-0:03
20K
12.43 mi12:35:141:34:077:3523:10
7:28
-0:04
HALF
13.11 mi12:40:191:39:127:355:05
7:28
0:00
25K
15.53 mi12:58:111:57:047:3317:52
7:23
-0:05
30K
18.64 mi13:21:222:20:157:3223:11
7:28
+0:05
20M
20.00 mi13:31:272:30:207:3210:05
7:26
-0:02
21M
21.00 mi13:39:012:37:547:327:34
7:34
+0:08
35K
21.75 mi13:44:312:43:247:315:30
7:22
-0:12
23M
23.00 mi13:53:402:52:337:319:09
7:19
-0:03
24M
24.00 mi14:00:412:59:347:297:01
7:01
-0:18
40K
24.85 mi14:06:533:05:467:296:12
7:16
+0:15
25.2M
25.20 mi14:09:403:08:337:292:47
8:05
+0:49
FINISH
26.22 mi14:17:093:16:027:297:29
7:21
-0:44

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

7:01 /mi

Average Pace

7:29 /mi

Slowest Pace

8:05 /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

2:49:13

86% of race

Time at Steady Pace

26:49

14% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:29 /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 mi11:25:0924:027:4524:02
7:45
#14868
10K
6.21 mi11:48:4247:357:4023:33
7:35
#14240
15K
9.32 mi12:12:041:10:577:3723:22
7:32
#13775
20K
12.43 mi12:35:141:34:077:3523:10
7:28
#13220
HALF
13.11 mi12:40:191:39:127:355:05
7:28
#13181
25K
15.53 mi12:58:111:57:047:3317:52
7:23
#12702
30K
18.64 mi13:21:222:20:157:3223:11
7:28
#12069
20M
20.00 mi13:31:272:30:207:3210:05
7:26
#11777
21M
21.00 mi13:39:012:37:547:327:34
7:34
#11463
35K
21.75 mi13:44:312:43:247:315:30
7:22
#11362
23M
23.00 mi13:53:402:52:337:319:09
7:19
#11084
24M
24.00 mi14:00:412:59:347:297:01
7:01
#10809
40K
24.85 mi14:06:533:05:467:296:12
7:16
#10647
25.2M
25.20 mi14:09:403:08:337:292:47
8:05
#10607
FINISH
26.22 mi14:17:093:16:027:297:29
7:21
#10563
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi148684593459312994(Top 45%)3571(Top 28%)3571(Top 200%)
10K6.21 mi3.10 mi14240+6284239+3544239+35413680(Top 47%)3922(Top 31%)3922(Top 220%)
15K9.32 mi3.11 mi13775+4653985+2543985+25412994(Top 45%)3571(Top 28%)3571(Top 200%)
20K12.43 mi3.11 mi13220+5553699+2863699+28611607(Top 40%)2887(Top 23%)2887(Top 162%)
HALF13.11 mi0.68 mi13181+393682+173682+1712648(Top 44%)3366(Top 27%)3366(Top 188%)
25K15.53 mi2.42 mi12702+4793415+2673415+26710310(Top 36%)2292(Top 18%)2292(Top 128%)
30K18.64 mi3.11 mi12069+6333126+2893126+2899377(Top 32%)1978(Top 16%)1978(Top 111%)
20M20.00 mi1.36 mi11777+2922976+1502976+1508599(Top 30%)1755(Top 14%)1755(Top 98%)
21M21.00 mi1.00 mi11463+3142815+1612815+1616974(Top 24%)1205(Top 10%)1205(Top 67%)
35K21.75 mi0.75 mi11362+1012779+362779+369781(Top 34%)2390(Top 19%)2390(Top 134%)
23M23.00 mi1.25 mi11084+2782677+1022677+1027583(Top 26%)1463(Top 12%)1463(Top 82%)
24M24.00 mi1.00 mi10809+2752560+1172560+1176630(Top 23%)1173(Top 9%)1173(Top 66%)
40K24.85 mi0.85 mi10647+1622502+582502+587166(Top 25%)1454(Top 12%)1454(Top 81%)
25.2M25.20 mi0.35 mi10607+402493+92493+98874(Top 31%)2298(Top 18%)2298(Top 129%)
FINISH26.22 mi1.02 mi10563+442502-92502-910234(Top 35%)2956(Top 24%)2956(Top 166%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 45%
×21
+97ft-345ft

Overall

12994

Females

3571

F45-49

3571

5K→10K

3.1 - 6.2 mi

Top 47%
×5
+79ft-138ft

Overall

13680

Females

3922

F45-49

3922

10K→15K

6.2 - 9.3 mi

Top 45%
×3
+67ft-78ft

Overall

12994

Females

3571

F45-49

3571

15K→20K

9.3 - 12.4 mi

Top 40%
×5
+106ft-86ft

Overall

11607

Females

2887

F45-49

2887

20K→HALF

12.4 - 13.1 mi

Top 44%
×2
+19ft-37ft

Overall

12648

Females

3366

F45-49

3366

HALF→25K

13.1 - 15.5 mi

Top 36%
×4
+66ft-88ft

Overall

10310

Females

2292

F45-49

2292

25K→30K

15.5 - 18.6 mi

Top 32%
×9
+181ft-148ft

Overall

9377

Females

1978

F45-49

1978

30K→20M

18.6 - 20.0 mi

Top 30%
×5
+64ft-50ft

Overall

8599

Females

1755

F45-49

1755

20M→21M

20.0 - 21.0 mi

Top 24%
×8
+106ft-24ft

Overall

6974

Females

1205

F45-49

1205

21M→35K

21.0 - 21.8 mi

Top 34%
×7
+17ft-86ft

Overall

9781

Females

2390

F45-49

2390

35K→23M

21.8 - 23.0 mi

Top 26%
×5
+23ft-63ft

Overall

7583

Females

1463

F45-49

1463

23M→24M

23.0 - 24.0 mi

Top 23%
×6
+12ft-82ft

Overall

6630

Females

1173

F45-49

1173

24M→40K

24.0 - 24.9 mi

Top 25%
×1
+6ft-20ft

Overall

7166

Females

1454

F45-49

1454

40K→25.2M

24.9 - 25.2 mi

Top 31%
×1
+13ft-16ft

Overall

8874

Females

2298

F45-49

2298

25.2M→FINISH

25.2 - 26.2 mi

Top 35%
×2
+22ft-21ft

Overall

10234

Females

2956

F45-49

2956

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
4573*
Passed By
268
Net Change
+4305
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14868
5K → 10K727*99+628#14868#14240
10K → 15K506*41+465#14240#13775
15K → 20K564*9+555#13775#13220
20K → HALF6122+39#13220#13181
HALF → 25K483*4+479#13181#12702
25K → 30K637*4+633#12702#12069
30K → 20M296*4+292#12069#11777
20M → 21M318*4+314#11777#11463
21M → 35K11413+101#11463#11362
35K → 23M283*5+278#11362#11084
23M → 24M277*2+275#11084#10809
24M → 40K1697+162#10809#10647
40K → 25.2M477+40#10647#10607
25.2M → FINISH9147+44#10607#10563
TOTALS4573*268+4305

* 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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