All Results|Race Analytics|Course|Contact
BOSTON MARATHON 2026

Jianhua Dai

Bib: 25309•F

Boston Marathon logo
0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 29021
Gender (Female)
#0 / 12578
Masters (Masters Women)
#0 / 6862
Age Group (F60-64)
#0 / 782
Top 21%
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
26:32
3.11 mi
Rank: #20320
Start → 5K
26:32 | 8:33/mi
10K
52:56
6.21 mi
Rank: #20277 (+43)
5K → 10K
26:24 | 8:30/mi
15K
1:19:37
9.32 mi
Rank: #20371 (-94)
10K → 15K
26:41 | 8:36/mi
20K
1:46:57
12.43 mi
Rank: #20520 (-149)
15K → 20K
27:20 | 8:48/mi
HALF
1:52:45
13.11 mi
Rank: #20507 (+13)
20K → HALF
5:48 | 8:31/mi
25K
2:14:30
15.53 mi
Rank: #20609 (-102)
HALF → 25K
21:45 | 8:59/mi
30K
2:42:30
18.64 mi
Rank: #20433 (+176)
25K → 30K
28:00 | 9:01/mi
20M
2:54:53
20.00 mi
Rank: #20347 (+86)
30K → 20M
12:23 | 9:08/mi
21M
3:04:51
21.00 mi
Rank: #20352 (-5)
20M → 21M
9:58 | 9:58/mi
35K
3:11:28
21.75 mi
Rank: #20328 (+24)
21M → 35K
6:37 | 8:51/mi
23M
3:23:07
23.00 mi
Rank: #20297 (+31)
35K → 23M
11:39 | 9:19/mi
24M
3:32:08
24.00 mi
Rank: #20261 (+36)
23M → 24M
9:01 | 9:01/mi
40K
3:40:14
24.85 mi
Rank: #20254 (+7)
24M → 40K
8:06 | 9:29/mi
25.2M
3:43:40
25.20 mi
Rank: #20240 (+14)
40K → 25.2M
3:26 | 9:58/mi
FINISH
3:52:44
26.22 mi
Rank: #20232 (+8)
25.2M → FINISH
9:04 | 8:54/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:52:45
Pace8:37 /mi
2nd Half
Distance13.11 mi
Time1:59:59
Pace9:10 /mi
📊Positive Split: 6.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:31:3526:328:3326:32
8:33
-
10K
6.21 mi11:57:5952:568:3226:24
8:30
-0:03
15K
9.32 mi12:24:401:19:378:3326:41
8:36
+0:06
20K
12.43 mi12:52:001:46:578:3727:20
8:48
+0:12
HALF
13.11 mi12:57:481:52:458:375:48
8:31
-0:17
25K
15.53 mi13:19:332:14:308:4021:45
8:59
+0:28
30K
18.64 mi13:47:332:42:308:4428:00
9:01
+0:02
20M
20.00 mi13:59:562:54:538:4512:23
9:08
+0:07
21M
21.00 mi14:09:543:04:518:499:58
9:58
+0:50
35K
21.75 mi14:16:313:11:288:496:37
8:51
-1:07
23M
23.00 mi14:28:103:23:078:5011:39
9:19
+0:28
24M
24.00 mi14:37:113:32:088:519:01
9:01
-0:18
40K
24.85 mi14:45:173:40:148:528:06
9:29
+0:28
25.2M
25.20 mi14:48:433:43:408:533:26
9:58
+0:29
FINISH
26.22 mi14:57:473:52:448:539:04
8:54
-1:04

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

8:30 /mi

Average Pace

8:53 /mi

Slowest Pace

9:58 /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

3:31:14

91% of race

Time at Steady Pace

21:30

9% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:53 /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 mi11:31:3526:328:3326:32
8:33
#20320
10K
6.21 mi11:57:5952:568:3226:24
8:30
#20277
15K
9.32 mi12:24:401:19:378:3326:41
8:36
#20371
20K
12.43 mi12:52:001:46:578:3727:20
8:48
#20520
HALF
13.11 mi12:57:481:52:458:375:48
8:31
#20507
25K
15.53 mi13:19:332:14:308:4021:45
8:59
#20609
30K
18.64 mi13:47:332:42:308:4428:00
9:01
#20433
20M
20.00 mi13:59:562:54:538:4512:23
9:08
#20347
21M
21.00 mi14:09:543:04:518:499:58
9:58
#20352
35K
21.75 mi14:16:313:11:288:496:37
8:51
#20328
23M
23.00 mi14:28:103:23:078:5011:39
9:19
#20297
24M
24.00 mi14:37:113:32:088:519:01
9:01
#20261
40K
24.85 mi14:45:173:40:148:528:06
9:29
#20254
25.2M
25.20 mi14:48:433:43:408:533:26
9:58
#20240
FINISH
26.22 mi14:57:473:52:448:539:04
8:54
#20232
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF60-64Seg. OverallSeg. FemalesSeg. F60-64
5K3.11 mi3.11 mi203207814781420620(Top 71%)7912(Top 63%)7912(Top 1012%)
10K6.21 mi3.10 mi20277+437762+527762+5220339(Top 70%)7774(Top 62%)7774(Top 994%)
15K9.32 mi3.11 mi20371-947804-427804-4220620(Top 71%)7912(Top 63%)7912(Top 1012%)
20K12.43 mi3.11 mi20520-1497897-937897-9320970(Top 72%)8125(Top 65%)8125(Top 1039%)
HALF13.11 mi0.68 mi20507+137888+97888+920342(Top 70%)7773(Top 62%)7773(Top 994%)
25K15.53 mi2.42 mi20609-1027961-737961-7321043(Top 73%)8190(Top 65%)8190(Top 1047%)
30K18.64 mi3.11 mi20433+1767893+687893+6819651(Top 68%)7568(Top 60%)7568(Top 968%)
20M20.00 mi1.36 mi20347+867848+457848+4519513(Top 67%)7550(Top 60%)7550(Top 965%)
21M21.00 mi1.00 mi20352-57864-167864-1620321(Top 70%)8025(Top 64%)8025(Top 1026%)
35K21.75 mi0.75 mi20328+247862+27862+219393(Top 67%)7654(Top 61%)7654(Top 979%)
23M23.00 mi1.25 mi20297+317853+97853+919881(Top 69%)7928(Top 63%)7928(Top 1014%)
24M24.00 mi1.00 mi20261+367857-47857-419555(Top 67%)7822(Top 62%)7822(Top 1000%)
40K24.85 mi0.85 mi20254+77875-187875-1820307(Top 70%)8225(Top 65%)8225(Top 1052%)
25.2M25.20 mi0.35 mi20240+147874+17874+119301(Top 67%)7724(Top 61%)7724(Top 988%)
FINISH26.22 mi1.02 mi20232+87883-97883-920103(Top 69%)8132(Top 65%)8132(Top 1040%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 71%
×21
+97ft-345ft

Overall

20620

Females

7912

F60-64

7912

5K→10K

3.1 - 6.2 mi

Top 70%
×5
+79ft-138ft

Overall

20339

Females

7774

F60-64

7774

10K→15K

6.2 - 9.3 mi

Top 71%
×3
+67ft-78ft

Overall

20620

Females

7912

F60-64

7912

15K→20K

9.3 - 12.4 mi

Top 72%
×5
+106ft-86ft

Overall

20970

Females

8125

F60-64

8125

20K→HALF

12.4 - 13.1 mi

Top 70%
×2
+19ft-37ft

Overall

20342

Females

7773

F60-64

7773

HALF→25K

13.1 - 15.5 mi

Top 73%
×4
+66ft-88ft

Overall

21043

Females

8190

F60-64

8190

25K→30K

15.5 - 18.6 mi

Top 68%
×9
+181ft-148ft

Overall

19651

Females

7568

F60-64

7568

30K→20M

18.6 - 20.0 mi

Top 67%
×5
+64ft-50ft

Overall

19513

Females

7550

F60-64

7550

20M→21M

20.0 - 21.0 mi

Top 70%
×8
+106ft-24ft

Overall

20321

Females

8025

F60-64

8025

21M→35K

21.0 - 21.8 mi

Top 67%
×7
+17ft-86ft

Overall

19393

Females

7654

F60-64

7654

35K→23M

21.8 - 23.0 mi

Top 69%
×5
+23ft-63ft

Overall

19881

Females

7928

F60-64

7928

23M→24M

23.0 - 24.0 mi

Top 67%
×6
+12ft-82ft

Overall

19555

Females

7822

F60-64

7822

24M→40K

24.0 - 24.9 mi

Top 70%
×1
+6ft-20ft

Overall

20307

Females

8225

F60-64

8225

40K→25.2M

24.9 - 25.2 mi

Top 67%
×1
+13ft-16ft

Overall

19301

Females

7724

F60-64

7724

25.2M→FINISH

25.2 - 26.2 mi

Top 69%
×2
+22ft-21ft

Overall

20103

Females

8132

F60-64

8132

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1521
Passed By
1433
Net Change
+88
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20320
5K → 10K292249+43#20320#20277
10K → 15K152246-94#20277#20371
15K → 20K113262-149#20371#20520
20K → HALF3623+13#20520#20507
HALF → 25K109211-102#20507#20609
25K → 30K25781+176#20609#20433
30K → 20M12741+86#20433#20347
20M → 21M8186-5#20347#20352
21M → 35K5228+24#20352#20328
35K → 23M7847+31#20328#20297
23M → 24M7539+36#20297#20261
24M → 40K5952+7#20261#20254
40K → 25.2M3319+14#20254#20240
25.2M → FINISH5749+8#20240#20232
TOTALS15211433+88
📊

Passing Analysis Visualizations

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

Time:
Category:

📈Position Graph

Loading...

🎨Heatmap Timeline

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Activity Data

Upload your GPX file to see detailed activity metrics

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export & Support

Download your data, get help, and share your feedback

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing