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BOSTON MARATHON 2024

Jui En Chang

Bib: 18453•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 25550
Gender (Female)
#0 / 10924
Masters (Masters Women)
#0 / 6263
Division (F40-44)
#0 / 1613
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:19
Rank: #13330
Start → 5K
7:50/mi
24:19 split
10K· 6.21 mi
49:50
Rank: #14571 (-1241)
5K → 10K
8:13/mi
25:31 split
15K· 9.32 mi
1:16:13
Rank: #15212 (-641)
10K → 15K
8:30/mi
26:23 split
20K· 12.43 mi
1:44:48
Rank: #16030 (-818)
15K → 20K
9:12/mi
28:35 split
Half· 13.11 mi
1:51:35
Rank: #16448 (-418)
20K → Half
9:57/mi
6:47 split
25K· 15.53 mi
2:19:13
Rank: #18128 (-1680)
Half → 25K
11:24/mi
27:38 split
30K· 18.64 mi
2:53:48
Rank: #18740 (-612)
25K → 30K
11:08/mi
34:35 split
20M
3:09:09
Rank: #18864 (-124)
30K → 20M
11:18/mi
15:21 split
21M
3:21:37
Rank: #18940 (-76)
20M → 21M
12:28/mi
12:28 split
35K· 21.75 mi
3:29:24
Rank: #18901 (+39)
21M → 35K
10:24/mi
7:47 split
23M
3:42:52
Rank: #18782 (+119)
35K → 23M
10:45/mi
13:28 split
24M
3:53:06
Rank: #18691 (+91)
23M → 24M
10:14/mi
10:14 split
40K· 24.85 mi
4:02:04
Rank: #18604 (+87)
24M → 40K
10:29/mi
8:58 split
25.2M
4:06:17
Rank: #18578 (+26)
40K → 25.2M
12:14/mi
4:13 split
Finish· 26.22 mi
4:16:30
Rank: #18555 (+23)
25.2M → Finish
10:02/mi
10:13 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:51:35
Pace8:31 /mi
2nd Half
Distance13.11 mi
Time2:24:55
Pace11:03 /mi
📊Positive Split: 29.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:22:5724:197:5024:19
7:50
-
10K
6.21 mi11:48:2849:508:0125:31
8:13
+0:23
15K
9.32 mi12:14:511:16:138:1126:23
8:30
+0:17
20K
12.43 mi12:43:261:44:488:2628:35
9:12
+0:42
Half
13.11 mi12:50:131:51:358:316:47
9:57
+0:45
25K
15.53 mi13:17:512:19:138:5827:38
11:24
+1:27
30K
18.64 mi13:52:262:53:489:1934:35
11:08
-0:16
20M
20.00 mi14:07:473:09:099:2715:21
11:18
+0:10
21M
21.00 mi14:20:153:21:379:3612:28
12:28
+1:10
35K
21.75 mi14:28:023:29:249:387:47
10:24
-2:04
23M
23.00 mi14:41:303:42:529:4113:28
10:45
+0:21
24M
24.00 mi14:51:443:53:069:4310:14
10:14
-0:31
40K
24.85 mi15:00:424:02:049:448:58
10:29
+0:15
25.2M
25.20 mi15:04:554:06:179:464:13
12:14
+1:45
Finish
26.22 mi15:15:084:16:309:4710:13
10:02
-2:12

Checkpoints & Pacing

📈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

7:50 /mi

Average Pace

9:47 /mi

Slowest Pace

12:28 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:44:48

41% of race

Time at Steady Pace

57:27

22% of race

Time at Slower Pace

1:34:15

37% of race

Average Pace: 9:47 /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

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:22:5724:197:5024:19
7:50
#13330
10K
6.21 mi11:48:2849:508:0125:31
8:13
#14571
15K
9.32 mi12:14:511:16:138:1126:23
8:30
#15212
20K
12.43 mi12:43:261:44:488:2628:35
9:12
#16030
Half
13.11 mi12:50:131:51:358:316:47
9:57
#16448
25K
15.53 mi13:17:512:19:138:5827:38
11:24
#18128
30K
18.64 mi13:52:262:53:489:1934:35
11:08
#18740
20M
20.00 mi14:07:473:09:099:2715:21
11:18
#18864
21M
21.00 mi14:20:153:21:379:3612:28
12:28
#18940
35K
21.75 mi14:28:023:29:249:387:47
10:24
#18901
23M
23.00 mi14:41:303:42:529:4113:28
10:45
#18782
24M
24.00 mi14:51:443:53:069:4310:14
10:14
#18691
40K
24.85 mi15:00:424:02:049:448:58
10:29
#18604
25.2M
25.20 mi15:04:554:06:179:464:13
12:14
#18578
Finish
26.22 mi15:15:084:16:309:4710:13
10:02
#18555
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi133303915391516370(Top 64%)5791(Top 53%)5791(Top 359%)
10K6.21 mi3.10 mi14571-12414673-7584673-75815634(Top 61%)5299(Top 49%)5299(Top 329%)
15K9.32 mi3.11 mi15212-6415080-4075080-40716370(Top 64%)5791(Top 53%)5791(Top 359%)
20K12.43 mi3.11 mi16030-8185594-5145594-51418201(Top 71%)6811(Top 62%)6811(Top 422%)
Half13.11 mi0.68 mi16448-4185840-2465840-24621333(Top 83%)8580(Top 79%)8580(Top 532%)
25K15.53 mi2.42 mi18128-16806838-9986838-99822248(Top 87%)9126(Top 84%)9126(Top 566%)
30K18.64 mi3.11 mi18740-6127232-3947232-39420281(Top 79%)8257(Top 76%)8257(Top 512%)
20M20.00 mi1.36 mi18864-1247328-967328-9619976(Top 78%)8204(Top 75%)8204(Top 509%)
21M21.00 mi1.00 mi18940-767400-727400-7219796(Top 77%)8214(Top 75%)8214(Top 509%)
35K21.75 mi0.75 mi18901+397392+87392+818317(Top 72%)7494(Top 69%)7494(Top 465%)
23M23.00 mi1.25 mi18782+1197341+517341+5117727(Top 69%)7283(Top 67%)7283(Top 452%)
24M24.00 mi1.00 mi18691+917322+197322+1917095(Top 67%)6998(Top 64%)6998(Top 434%)
40K24.85 mi0.85 mi18604+877297+257297+2516681(Top 65%)6857(Top 63%)6857(Top 425%)
25.2M25.20 mi0.35 mi18578+267294+37294+317900(Top 70%)7500(Top 69%)7500(Top 465%)
Finish26.22 mi1.02 mi18555+237310-167310-1618493(Top 72%)7733(Top 71%)7733(Top 479%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 64%
×21story building
+97ft-345ft

Overall

16370

Females

5791

F40-44

5791

5K→10K

3.1 - 6.2 mi

Top 61%
×5story building
+79ft-138ft

Overall

15634

Females

5299

F40-44

5299

10K→15K

6.2 - 9.3 mi

Top 64%
×3story building
+67ft-78ft

Overall

16370

Females

5791

F40-44

5791

15K→20K

9.3 - 12.4 mi

Top 71%
×5story building
+106ft-86ft

Overall

18201

Females

6811

F40-44

6811

20K→Half

12.4 - 13.1 mi

Top 83%
×2story building
+19ft-37ft

Overall

21333

Females

8580

F40-44

8580

Half→25K

13.1 - 15.5 mi

Top 87%
×4story building
+66ft-88ft

Overall

22248

Females

9126

F40-44

9126

25K→30K

15.5 - 18.6 mi

Top 79%
×9story building
+181ft-148ft

Overall

20281

Females

8257

F40-44

8257

30K→20M

18.6 - 20.0 mi

Top 78%
×5story building
+64ft-50ft

Overall

19976

Females

8204

F40-44

8204

20M→21M

20.0 - 21.0 mi

Top 77%
×8story building
+106ft-24ft

Overall

19796

Females

8214

F40-44

8214

21M→35K

21.0 - 21.8 mi

Top 72%
×7story building
+17ft-86ft

Overall

18317

Females

7494

F40-44

7494

35K→23M

21.8 - 23.0 mi

Top 69%
×5story building
+23ft-63ft

Overall

17727

Females

7283

F40-44

7283

23M→24M

23.0 - 24.0 mi

Top 67%
×6story building
+12ft-82ft

Overall

17095

Females

6998

F40-44

6998

24M→40K

24.0 - 24.9 mi

Top 65%
×1story
+6ft-20ft

Overall

16681

Females

6857

F40-44

6857

40K→25.2M

24.9 - 25.2 mi

Top 70%
×1story
+13ft-16ft

Overall

17900

Females

7500

F40-44

7500

25.2M→Finish

25.2 - 26.2 mi

Top 72%
×2story building
+22ft-21ft

Overall

18493

Females

7733

F40-44

7733

Passing Analysis

Category:
Athletes Passed
1012
Passed By
6237
Net Change
-5225
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13330
5K → 10K471288-1241#13330#14571
10K → 15K88729-641#14571#15212
15K → 20K85903-818#15212#16030
20K → Half3421-418#16030#16448
Half → 25K231703-1680#16448#18128
25K → 30K90702-612#18128#18740
30K → 20M65189-124#18740#18864
20M → 21M58134-76#18864#18940
21M → 35K7435+39#18940#18901
35K → 23M15334+119#18901#18782
23M → 24M11322+91#18782#18691
24M → 40K9710+87#18691#18604
40K → 25.2M4317+26#18604#18578
25.2M → Finish7350+23#18578#18555
TOTALS10126237-5225
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing