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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing
BOSTON MARATHON 2026

Masako Imaizumi

Bib: 30439 •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 (F70-74)
#0 / 81
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
34:58
3.11 mi
Rank: #28304
Start → 5K
34:58 | 11:16/mi
10K
1:11:19
6.21 mi
Rank: #28370 (-66)
5K → 10K
36:21 | 11:42/mi
15K
1:50:34
9.32 mi
Rank: #28535 (-165)
10K → 15K
39:15 | 12:39/mi
20K
2:33:13
12.43 mi
Rank: #28698 (-163)
15K → 20K
42:39 | 13:44/mi
HALF
2:42:06
13.11 mi
Rank: #28710 (-12)
20K → HALF
8:53 | 13:02/mi
25K
3:15:03
15.53 mi
Rank: #28692 (+18)
HALF → 25K
32:57 | 13:36/mi
30K
3:59:03
18.64 mi
Rank: #28663 (+29)
25K → 30K
44:00 | 14:10/mi
20M
4:17:37
20.00 mi
Rank: #28631 (+32)
30K → 20M
18:34 | 13:41/mi
21M
4:32:57
21.00 mi
Rank: #28618 (+13)
20M → 21M
15:20 | 15:20/mi
35K
4:42:05
21.75 mi
Rank: #28593 (+25)
21M → 35K
9:08 | 12:13/mi
23M
4:58:36
23.00 mi
Rank: #28560 (+33)
35K → 23M
16:31 | 13:12/mi
24M
5:11:01
24.00 mi
Rank: #28525 (+35)
23M → 24M
12:25 | 12:25/mi
40K
5:22:33
24.85 mi
Rank: #28500 (+25)
24M → 40K
11:32 | 13:30/mi
25.2M
5:27:38
25.20 mi
Rank: #28496 (+4)
40K → 25.2M
5:05 | 14:45/mi
FINISH
5:40:28
26.22 mi
Rank: #28486 (+10)
25.2M → FINISH
12:50 | 12:36/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
Time2:42:06
Pace12:22 /mi
2nd Half
Distance13.11 mi
Time2:58:22
Pace13:37 /mi
📊Positive Split: 10.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi12:01:3234:5811:1634:58
11:16
-
10K
6.21 mi12:37:531:11:1911:2936:21
11:42
+0:26
15K
9.32 mi13:17:081:50:3411:5239:15
12:39
+0:57
20K
12.43 mi13:59:472:33:1312:2042:39
13:44
+1:05
HALF
13.11 mi14:08:402:42:0612:228:53
13:02
-0:42
25K
15.53 mi14:41:373:15:0312:3432:57
13:36
+0:34
30K
18.64 mi15:25:373:59:0312:5044:00
14:10
+0:34
20M
20.00 mi15:44:114:17:3712:5318:34
13:41
-0:29
21M
21.00 mi15:59:314:32:5713:0015:20
15:20
+1:39
35K
21.75 mi16:08:394:42:0512:599:08
12:13
-3:07
23M
23.00 mi16:25:104:58:3612:5916:31
13:12
+0:59
24M
24.00 mi16:37:355:11:0112:5812:25
12:25
-0:47
40K
24.85 mi16:49:075:22:3312:5911:32
13:30
+1:05
25.2M
25.20 mi16:54:125:27:3813:015:05
14:45
+1:15
FINISH
26.22 mi17:07:025:40:2813:0012:50
12:36
-2:09

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

11:16 /mi

Average Pace

13:00 /mi

Slowest Pace

15:20 /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

2:24:57

43% of race

Time at Steady Pace

1:28:27

26% of race

Time at Slower Pace

1:47:04

31% of race

Average Pace: 12:59 /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 mi12:01:3234:5811:1634:58
11:16
#28304
10K
6.21 mi12:37:531:11:1911:2936:21
11:42
#28370
15K
9.32 mi13:17:081:50:3411:5239:15
12:39
#28535
20K
12.43 mi13:59:472:33:1312:2042:39
13:44
#28698
HALF
13.11 mi14:08:402:42:0612:228:53
13:02
#28710
25K
15.53 mi14:41:373:15:0312:3432:57
13:36
#28692
30K
18.64 mi15:25:373:59:0312:5044:00
14:10
#28663
20M
20.00 mi15:44:114:17:3712:5318:34
13:41
#28631
21M
21.00 mi15:59:314:32:5713:0015:20
15:20
#28618
35K
21.75 mi16:08:394:42:0512:599:08
12:13
#28593
23M
23.00 mi16:25:104:58:3612:5916:31
13:12
#28560
24M
24.00 mi16:37:355:11:0112:5812:25
12:25
#28525
40K
24.85 mi16:49:075:22:3312:5911:32
13:30
#28500
25.2M
25.20 mi16:54:125:27:3813:015:05
14:45
#28496
FINISH
26.22 mi17:07:025:40:2813:0012:50
12:36
#28486
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF70-74Seg. OverallSeg. FemalesSeg. F70-74
5K3.11 mi3.11 mi28304120861208628705(Top 99%)12368(Top 98%)12368(Top 15269%)
10K6.21 mi3.10 mi28370-6612133-4712133-4728391(Top 98%)12160(Top 97%)12160(Top 15012%)
15K9.32 mi3.11 mi28535-16512248-11512248-11528705(Top 99%)12368(Top 98%)12368(Top 15269%)
20K12.43 mi3.11 mi28698-16312361-11312361-11328856(Top 99%)12477(Top 99%)12477(Top 15404%)
HALF13.11 mi0.68 mi28710-1212368-712368-728739(Top 99%)12425(Top 99%)12425(Top 15340%)
25K15.53 mi2.42 mi28692+1812358+1012358+1028530(Top 98%)12280(Top 98%)12280(Top 15160%)
30K18.64 mi3.11 mi28663+2912344+1412344+1428452(Top 98%)12274(Top 98%)12274(Top 15153%)
20M20.00 mi1.36 mi28631+3212330+1412330+1427920(Top 96%)11999(Top 95%)11999(Top 14814%)
21M21.00 mi1.00 mi28618+1312324+612324+628254(Top 97%)12199(Top 97%)12199(Top 15060%)
35K21.75 mi0.75 mi28593+2512314+1012314+1026985(Top 93%)11554(Top 92%)11554(Top 14264%)
23M23.00 mi1.25 mi28560+3312296+1812296+1827552(Top 95%)11839(Top 94%)11839(Top 14616%)
24M24.00 mi1.00 mi28525+3512276+2012276+2027102(Top 93%)11677(Top 93%)11677(Top 14416%)
40K24.85 mi0.85 mi28500+2512263+1312263+1327497(Top 95%)11873(Top 94%)11873(Top 14658%)
25.2M25.20 mi0.35 mi28496+4122631226327795(Top 96%)12032(Top 96%)12032(Top 14854%)
FINISH26.22 mi1.02 mi28486+1012257+612257+627962(Top 96%)12098(Top 96%)12098(Top 14936%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 99%
×21
+97ft-345ft

Overall

28705

Females

12368

F70-74

12368

5K→10K

3.1 - 6.2 mi

Top 98%
×5
+79ft-138ft

Overall

28391

Females

12160

F70-74

12160

10K→15K

6.2 - 9.3 mi

Top 99%
×3
+67ft-78ft

Overall

28705

Females

12368

F70-74

12368

15K→20K

9.3 - 12.4 mi

Top 99%
×5
+106ft-86ft

Overall

28856

Females

12477

F70-74

12477

20K→HALF

12.4 - 13.1 mi

Top 99%
×2
+19ft-37ft

Overall

28739

Females

12425

F70-74

12425

HALF→25K

13.1 - 15.5 mi

Top 98%
×4
+66ft-88ft

Overall

28530

Females

12280

F70-74

12280

25K→30K

15.5 - 18.6 mi

Top 98%
×9
+181ft-148ft

Overall

28452

Females

12274

F70-74

12274

30K→20M

18.6 - 20.0 mi

Top 96%
×5
+64ft-50ft

Overall

27920

Females

11999

F70-74

11999

20M→21M

20.0 - 21.0 mi

Top 97%
×8
+106ft-24ft

Overall

28254

Females

12199

F70-74

12199

21M→35K

21.0 - 21.8 mi

Top 93%
×7
+17ft-86ft

Overall

26985

Females

11554

F70-74

11554

35K→23M

21.8 - 23.0 mi

Top 95%
×5
+23ft-63ft

Overall

27552

Females

11839

F70-74

11839

23M→24M

23.0 - 24.0 mi

Top 93%
×6
+12ft-82ft

Overall

27102

Females

11677

F70-74

11677

24M→40K

24.0 - 24.9 mi

Top 95%
×1
+6ft-20ft

Overall

27497

Females

11873

F70-74

11873

40K→25.2M

24.9 - 25.2 mi

Top 96%
×1
+13ft-16ft

Overall

27795

Females

12032

F70-74

12032

25.2M→FINISH

25.2 - 26.2 mi

Top 96%
×2
+22ft-21ft

Overall

27962

Females

12098

F70-74

12098

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
413
Passed By
595
Net Change
-182
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#28304
5K → 10K69135-66#28304#28370
10K → 15K24189-165#28370#28535
15K → 20K10173-163#28535#28698
20K → HALF315-12#28698#28710
HALF → 25K4325+18#28710#28692
25K → 30K5728+29#28692#28663
30K → 20M364+32#28663#28631
20M → 21M207+13#28631#28618
21M → 35K261+25#28618#28593
35K → 23M352+33#28593#28560
23M → 24M372+35#28560#28525
24M → 40K283+25#28525#28500
40K → 25.2M62+4#28500#28496
25.2M → FINISH199+10#28496#28486
TOTALS413595-182
📊

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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Activity Data

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