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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing
BOSTON MARATHON 2026

Chihiro Nakai

Bib: 17513 •F •Age: N/A

AL

Boston Marathon logo
0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Top 46%
Gender (Female)
#0 / 12578
Top 32%
Masters (Masters Women)
#0 / 6862
Top 16%
Age Group (F40-44)
#0 / 1737
Top 35%
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
24:04
3.11 mi
Rank: #14976
Start → 5K
24:04 | 7:45/mi
10K
47:59
6.21 mi
Rank: #14823 (+153)
5K → 10K
23:55 | 7:42/mi
15K
1:11:34
9.32 mi
Rank: #14352 (+471)
10K → 15K
23:35 | 7:36/mi
20K
1:35:39
12.43 mi
Rank: #14286 (+66)
15K → 20K
24:05 | 7:46/mi
HALF
1:40:44
13.11 mi
Rank: #14190 (+96)
20K → HALF
5:05 | 7:28/mi
25K
1:59:24
15.53 mi
Rank: #13957 (+233)
HALF → 25K
18:40 | 7:42/mi
30K
2:24:16
18.64 mi
Rank: #13849 (+108)
25K → 30K
24:52 | 8:01/mi
20M
2:35:21
20.00 mi
Rank: #13811 (+38)
30K → 20M
11:05 | 8:10/mi
21M
2:44:03
21.00 mi
Rank: #13839 (-28)
20M → 21M
8:42 | 8:42/mi
35K
2:49:50
21.75 mi
Rank: #13775 (+64)
21M → 35K
5:47 | 7:44/mi
23M
2:59:45
23.00 mi
Rank: #13643 (+132)
35K → 23M
9:55 | 7:56/mi
24M
3:07:24
24.00 mi
Rank: #13502 (+141)
23M → 24M
7:39 | 7:39/mi
40K
3:14:08
24.85 mi
Rank: #13428 (+74)
24M → 40K
6:44 | 7:53/mi
25.2M
3:17:07
25.20 mi
Rank: #13403 (+25)
40K → 25.2M
2:59 | 8:40/mi
FINISH
3:24:45
26.22 mi
Rank: #13296 (+107)
25.2M → FINISH
7:38 | 7:30/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:40:44
Pace7:42 /mi
2nd Half
Distance13.11 mi
Time1:44:01
Pace7:57 /mi
📊Positive Split: 3.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:08:5624:047:4524:04
7:45
-
10K
6.21 mi11:32:5147:597:4423:55
7:42
-0:03
15K
9.32 mi11:56:261:11:347:4123:35
7:36
-0:06
20K
12.43 mi12:20:311:35:397:4224:05
7:46
+0:10
HALF
13.11 mi12:25:361:40:447:425:05
7:28
-0:18
25K
15.53 mi12:44:161:59:247:4218:40
7:42
+0:14
30K
18.64 mi13:09:082:24:167:4524:52
8:01
+0:19
20M
20.00 mi13:20:132:35:217:4711:05
8:10
+0:09
21M
21.00 mi13:28:552:44:037:498:42
8:42
+0:32
35K
21.75 mi13:34:422:49:507:495:47
7:44
-0:58
23M
23.00 mi13:44:372:59:457:499:55
7:56
+0:12
24M
24.00 mi13:52:163:07:247:497:39
7:39
-0:17
40K
24.85 mi13:59:003:14:087:496:44
7:53
+0:14
25.2M
25.20 mi14:01:593:17:077:502:59
8:40
+0:47
FINISH
26.22 mi14:09:373:24:457:497:38
7:30
-1:10

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

7:28 /mi

Average Pace

7:49 /mi

Slowest Pace

8:42 /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

3:13:04

94% of race

Time at Steady Pace

11:41

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:49 /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 mi11:08:5624:047:4524:04
7:45
#14976
10K
6.21 mi11:32:5147:597:4423:55
7:42
#14823
15K
9.32 mi11:56:261:11:347:4123:35
7:36
#14352
20K
12.43 mi12:20:311:35:397:4224:05
7:46
#14286
HALF
13.11 mi12:25:361:40:447:425:05
7:28
#14190
25K
15.53 mi12:44:161:59:247:4218:40
7:42
#13957
30K
18.64 mi13:09:082:24:167:4524:52
8:01
#13849
20M
20.00 mi13:20:132:35:217:4711:05
8:10
#13811
21M
21.00 mi13:28:552:44:037:498:42
8:42
#13839
35K
21.75 mi13:34:422:49:507:495:47
7:44
#13775
23M
23.00 mi13:44:372:59:457:499:55
7:56
#13643
24M
24.00 mi13:52:163:07:247:497:39
7:39
#13502
40K
24.85 mi13:59:003:14:087:496:44
7:53
#13428
25.2M
25.20 mi14:01:593:17:077:502:59
8:40
#13403
FINISH
26.22 mi14:09:373:24:457:497:38
7:30
#13296
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi149764667466713592(Top 47%)3912(Top 31%)3912(Top 225%)
10K6.21 mi3.10 mi14823+1534598+694598+6914733(Top 51%)4526(Top 36%)4526(Top 261%)
15K9.32 mi3.11 mi14352+4714335+2634335+26313592(Top 47%)3912(Top 31%)3912(Top 225%)
20K12.43 mi3.11 mi14286+664305+304305+3014149(Top 49%)4289(Top 34%)4289(Top 247%)
HALF13.11 mi0.68 mi14190+964257+484257+4812739(Top 44%)3457(Top 27%)3457(Top 199%)
25K15.53 mi2.42 mi13957+2334133+1244133+12413035(Top 45%)3755(Top 30%)3755(Top 216%)
30K18.64 mi3.11 mi13849+1084107+264107+2613511(Top 47%)4127(Top 33%)4127(Top 238%)
20M20.00 mi1.36 mi13811+384118-114118-1113970(Top 48%)4469(Top 36%)4469(Top 257%)
21M21.00 mi1.00 mi13839-284161-434161-4314386(Top 50%)4785(Top 38%)4785(Top 275%)
35K21.75 mi0.75 mi13775+644146+154146+1512576(Top 43%)3850(Top 31%)3850(Top 222%)
23M23.00 mi1.25 mi13643+1324108+384108+3811957(Top 41%)3581(Top 28%)3581(Top 206%)
24M24.00 mi1.00 mi13502+1414048+604048+6011237(Top 39%)3301(Top 26%)3301(Top 190%)
40K24.85 mi0.85 mi13428+744024+244024+2411653(Top 40%)3596(Top 29%)3596(Top 207%)
25.2M25.20 mi0.35 mi13403+254022+24022+212654(Top 44%)4186(Top 33%)4186(Top 241%)
FINISH26.22 mi1.02 mi13296+1073988+343988+3411379(Top 39%)3546(Top 28%)3546(Top 204%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 47%
×21
+97ft-345ft

Overall

13592

Females

3912

F40-44

3912

5K→10K

3.1 - 6.2 mi

Top 51%
×5
+79ft-138ft

Overall

14733

Females

4526

F40-44

4526

10K→15K

6.2 - 9.3 mi

Top 47%
×3
+67ft-78ft

Overall

13592

Females

3912

F40-44

3912

15K→20K

9.3 - 12.4 mi

Top 49%
×5
+106ft-86ft

Overall

14149

Females

4289

F40-44

4289

20K→HALF

12.4 - 13.1 mi

Top 44%
×2
+19ft-37ft

Overall

12739

Females

3457

F40-44

3457

HALF→25K

13.1 - 15.5 mi

Top 45%
×4
+66ft-88ft

Overall

13035

Females

3755

F40-44

3755

25K→30K

15.5 - 18.6 mi

Top 47%
×9
+181ft-148ft

Overall

13511

Females

4127

F40-44

4127

30K→20M

18.6 - 20.0 mi

Top 48%
×5
+64ft-50ft

Overall

13970

Females

4469

F40-44

4469

20M→21M

20.0 - 21.0 mi

Top 50%
×8
+106ft-24ft

Overall

14386

Females

4785

F40-44

4785

21M→35K

21.0 - 21.8 mi

Top 43%
×7
+17ft-86ft

Overall

12576

Females

3850

F40-44

3850

35K→23M

21.8 - 23.0 mi

Top 41%
×5
+23ft-63ft

Overall

11957

Females

3581

F40-44

3581

23M→24M

23.0 - 24.0 mi

Top 39%
×6
+12ft-82ft

Overall

11237

Females

3301

F40-44

3301

24M→40K

24.0 - 24.9 mi

Top 40%
×1
+6ft-20ft

Overall

11653

Females

3596

F40-44

3596

40K→25.2M

24.9 - 25.2 mi

Top 44%
×1
+13ft-16ft

Overall

12654

Females

4186

F40-44

4186

25.2M→FINISH

25.2 - 26.2 mi

Top 39%
×2
+22ft-21ft

Overall

11379

Females

3546

F40-44

3546

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
2539*
Passed By
859
Net Change
+1680
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14976
5K → 10K353*200+153#14976#14823
10K → 15K513*42+471#14823#14352
15K → 20K188122+66#14352#14286
20K → HALF982+96#14286#14190
HALF → 25K264*31+233#14190#13957
25K → 30K240*132+108#13957#13849
30K → 20M11476+38#13849#13811
20M → 21M85113-28#13811#13839
21M → 35K8420+64#13839#13775
35K → 23M16331+132#13775#13643
23M → 24M15817+141#13643#13502
24M → 40K10733+74#13502#13428
40K → 25.2M3914+25#13428#13403
25.2M → FINISH13326+107#13403#13296
TOTALS2539*859+1680

* 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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