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BOSTON MARATHON 2026

Mengdan Chu

Bib: 23060•F

MI

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0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Top 48%
Gender (Female)
#0 / 12578
Top 34%
Masters (Masters Women)
#0 / 6862
Top 18%
Age Group (F55-59)
#0 / 951
Top 5%
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
24:23
3.11 mi
Rank: #15830
Start → 5K
24:23 | 7:51/mi
10K
48:06
6.21 mi
Rank: #14986 (+844)
5K → 10K
23:43 | 7:39/mi
15K
1:11:45
9.32 mi
Rank: #14534 (+452)
10K → 15K
23:39 | 7:37/mi
20K
1:35:55
12.43 mi
Rank: #14464 (+70)
15K → 20K
24:10 | 7:47/mi
HALF
1:41:05
13.11 mi
Rank: #14417 (+47)
20K → HALF
5:10 | 7:35/mi
25K
1:59:50
15.53 mi
Rank: #14185 (+232)
HALF → 25K
18:45 | 7:44/mi
30K
2:25:31
18.64 mi
Rank: #14408 (-223)
25K → 30K
25:41 | 8:16/mi
20M
2:36:36
20.00 mi
Rank: #14353 (+55)
30K → 20M
11:05 | 8:10/mi
21M
2:45:32
21.00 mi
Rank: #14393 (-40)
20M → 21M
8:56 | 8:56/mi
35K
2:51:47
21.75 mi
Rank: #14498 (-105)
21M → 35K
6:15 | 8:22/mi
23M
3:01:45
23.00 mi
Rank: #14337 (+161)
35K → 23M
9:58 | 7:58/mi
24M
3:09:37
24.00 mi
Rank: #14249 (+88)
23M → 24M
7:52 | 7:52/mi
40K
3:16:18
24.85 mi
Rank: #14120 (+129)
24M → 40K
6:41 | 7:50/mi
25.2M
3:19:08
25.20 mi
Rank: #14062 (+58)
40K → 25.2M
2:50 | 8:13/mi
FINISH
3:26:34
26.22 mi
Rank: #13879 (+183)
25.2M → FINISH
7:26 | 7:18/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:41:05
Pace7:43 /mi
2nd Half
Distance13.11 mi
Time1:45:29
Pace8:03 /mi
📊Positive Split: 4.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:27:2524:237:5124:23
7:51
-
10K
6.21 mi11:51:0848:067:4523:43
7:39
-0:12
15K
9.32 mi12:14:471:11:457:4223:39
7:37
-0:02
20K
12.43 mi12:38:571:35:557:4424:10
7:47
+0:10
HALF
13.11 mi12:44:071:41:057:435:10
7:35
-0:12
25K
15.53 mi13:02:521:59:507:4318:45
7:44
+0:09
30K
18.64 mi13:28:332:25:317:4925:41
8:16
+0:32
20M
20.00 mi13:39:382:36:367:5011:05
8:10
-0:06
21M
21.00 mi13:48:342:45:327:538:56
8:56
+0:46
35K
21.75 mi13:54:492:51:477:546:15
8:22
-0:34
23M
23.00 mi14:04:473:01:457:559:58
7:58
-0:24
24M
24.00 mi14:12:393:09:377:557:52
7:52
-0:06
40K
24.85 mi14:19:203:16:187:546:41
7:50
-0:02
25.2M
25.20 mi14:22:103:19:087:552:50
8:13
+0:23
FINISH
26.22 mi14:29:363:26:347:547:26
7:18
-0:55

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

7:18 /mi

Average Pace

7:53 /mi

Slowest Pace

8:56 /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

59:58

29% of race

Time at Steady Pace

1:31:49

44% of race

Time at Slower Pace

54:47

27% of race

Average Pace: 7:53 /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 mi11:27:2524:237:5124:23
7:51
#15830
10K
6.21 mi11:51:0848:067:4523:43
7:39
#14986
15K
9.32 mi12:14:471:11:457:4223:39
7:37
#14534
20K
12.43 mi12:38:571:35:557:4424:10
7:47
#14464
HALF
13.11 mi12:44:071:41:057:435:10
7:35
#14417
25K
15.53 mi13:02:521:59:507:4318:45
7:44
#14185
30K
18.64 mi13:28:332:25:317:4925:41
8:16
#14408
20M
20.00 mi13:39:382:36:367:5011:05
8:10
#14353
21M
21.00 mi13:48:342:45:327:538:56
8:56
#14393
35K
21.75 mi13:54:492:51:477:546:15
8:22
#14498
23M
23.00 mi14:04:473:01:457:559:58
7:58
#14337
24M
24.00 mi14:12:393:09:377:557:52
7:52
#14249
40K
24.85 mi14:19:203:16:187:546:41
7:50
#14120
25.2M
25.20 mi14:22:103:19:087:552:50
8:13
#14062
FINISH
26.22 mi14:29:363:26:347:547:26
7:18
#13879
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 mi158305200520013795(Top 48%)4032(Top 32%)4032(Top 424%)
10K6.21 mi3.10 mi14986+8444701+4994701+49914183(Top 49%)4228(Top 34%)4228(Top 445%)
15K9.32 mi3.11 mi14534+4524441+2604441+26013795(Top 48%)4032(Top 32%)4032(Top 424%)
20K12.43 mi3.11 mi14464+704415+264415+2614356(Top 49%)4413(Top 35%)4413(Top 464%)
HALF13.11 mi0.68 mi14417+474384+314384+3113737(Top 47%)4008(Top 32%)4008(Top 421%)
25K15.53 mi2.42 mi14185+2324274+1104274+11013322(Top 46%)3916(Top 31%)3916(Top 412%)
30K18.64 mi3.11 mi14408-2234449-1754449-17515394(Top 53%)5188(Top 41%)5188(Top 546%)
20M20.00 mi1.36 mi14353+554436+134436+1313976(Top 48%)4475(Top 36%)4475(Top 471%)
21M21.00 mi1.00 mi14393-404470-344470-3415780(Top 54%)5555(Top 44%)5555(Top 584%)
35K21.75 mi0.75 mi14498-1054562-924562-9216769(Top 58%)6180(Top 49%)6180(Top 650%)
23M23.00 mi1.25 mi14337+1614497+654497+6512238(Top 42%)3736(Top 30%)3736(Top 393%)
24M24.00 mi1.00 mi14249+884470+274470+2712836(Top 44%)4170(Top 33%)4170(Top 438%)
40K24.85 mi0.85 mi14120+1294422+484422+4811230(Top 39%)3385(Top 27%)3385(Top 356%)
25.2M25.20 mi0.35 mi14062+584402+204402+209840(Top 34%)2786(Top 22%)2786(Top 293%)
FINISH26.22 mi1.02 mi13879+1834314+884314+889902(Top 34%)2805(Top 22%)2805(Top 295%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 48%
×21
+97ft-345ft

Overall

13795

Females

4032

F55-59

4032

5K→10K

3.1 - 6.2 mi

Top 49%
×5
+79ft-138ft

Overall

14183

Females

4228

F55-59

4228

10K→15K

6.2 - 9.3 mi

Top 48%
×3
+67ft-78ft

Overall

13795

Females

4032

F55-59

4032

15K→20K

9.3 - 12.4 mi

Top 49%
×5
+106ft-86ft

Overall

14356

Females

4413

F55-59

4413

20K→HALF

12.4 - 13.1 mi

Top 47%
×2
+19ft-37ft

Overall

13737

Females

4008

F55-59

4008

HALF→25K

13.1 - 15.5 mi

Top 46%
×4
+66ft-88ft

Overall

13322

Females

3916

F55-59

3916

25K→30K

15.5 - 18.6 mi

Top 53%
×9
+181ft-148ft

Overall

15394

Females

5188

F55-59

5188

30K→20M

18.6 - 20.0 mi

Top 48%
×5
+64ft-50ft

Overall

13976

Females

4475

F55-59

4475

20M→21M

20.0 - 21.0 mi

Top 54%
×8
+106ft-24ft

Overall

15780

Females

5555

F55-59

5555

21M→35K

21.0 - 21.8 mi

Top 58%
×7
+17ft-86ft

Overall

16769

Females

6180

F55-59

6180

35K→23M

21.8 - 23.0 mi

Top 42%
×5
+23ft-63ft

Overall

12238

Females

3736

F55-59

3736

23M→24M

23.0 - 24.0 mi

Top 44%
×6
+12ft-82ft

Overall

12836

Females

4170

F55-59

4170

24M→40K

24.0 - 24.9 mi

Top 39%
×1
+6ft-20ft

Overall

11230

Females

3385

F55-59

3385

40K→25.2M

24.9 - 25.2 mi

Top 34%
×1
+13ft-16ft

Overall

9840

Females

2786

F55-59

2786

25.2M→FINISH

25.2 - 26.2 mi

Top 34%
×2
+22ft-21ft

Overall

9902

Females

2805

F55-59

2805

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
2991*
Passed By
896
Net Change
+1951
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15830
5K → 10K903*59+844#15830#14986
10K → 15K499*47+452#14986#14534
15K → 20K197127+70#14534#14464
20K → HALF6013+47#14464#14417
HALF → 25K272*40+232#14417#14185
25K → 30K121200-223#14185#14408
30K → 20M12368+55#14408#14353
20M → 21M87127-40#14353#14393
21M → 35K38143-105#14393#14498
35K → 23M18221+161#14498#14337
23M → 24M11931+88#14337#14249
24M → 40K1389+129#14249#14120
40K → 25.2M624+58#14120#14062
25.2M → FINISH1907+183#14062#13879
TOTALS2991*896+1951

* 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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Qualifying & Age Grade

See how your performance stacks up against qualifying standards

OTQ

Olympic Trials Qualifying analysis available

Activity Data

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing