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BOSTON MARATHON 2024

Kai-Di Chang

Bib: 6303•M

0:00
0:00
/ mi
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Overall
#0 / 25550
Top 35%
Gender (Male)
#0 / 14578
Top 46%
Division (M18-39)
#0 / 4849
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:37
Rank: #6790
Start → 5K
21:37 | 6:57/mi
10K· 6.21 mi
43:22
Rank: #6708 (+82)
5K → 10K
21:45 | 7:00/mi
15K· 9.32 mi
1:05:12
Rank: #6577 (+131)
10K → 15K
21:50 | 7:02/mi
20K· 12.43 mi
1:28:20
Rank: #6841 (-264)
15K → 20K
23:08 | 7:27/mi
Half· 13.11 mi
1:33:06
Rank: #6766 (+75)
20K → Half
4:46 | 6:59/mi
25K· 15.53 mi
1:51:04
Rank: #6634 (+132)
Half → 25K
17:58 | 7:25/mi
30K· 18.64 mi
2:16:43
Rank: #7044 (-410)
25K → 30K
25:39 | 8:15/mi
20M
2:28:47
Rank: #7321 (-277)
30K → 20M
12:04 | 8:53/mi
21M
2:38:51
Rank: #7670 (-349)
20M → 21M
10:04 | 10:04/mi
35K· 21.75 mi
2:45:09
Rank: #7717 (-47)
21M → 35K
6:18 | 8:25/mi
23M
2:57:33
Rank: #8191 (-474)
35K → 23M
12:24 | 9:54/mi
24M
3:06:31
Rank: #8319 (-128)
23M → 24M
8:58 | 8:58/mi
40K· 24.85 mi
3:14:37
Rank: #8500 (-181)
24M → 40K
8:06 | 9:28/mi
25.2M
3:18:29
Rank: #8626 (-126)
40K → 25.2M
3:52 | 11:13/mi
Finish· 26.22 mi
3:27:31
Rank: #8840 (-214)
25.2M → Finish
9:02 | 8:52/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:33:06
Pace7:06 /mi
2nd Half
Distance13.11 mi
Time1:54:25
Pace8:44 /mi
📊Positive Split: 22.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:27:2521:376:5721:37
6:57
-
10K
6.21 mi10:49:1043:226:5921:45
7:00
+0:03
15K
9.32 mi11:11:001:05:127:0021:50
7:02
+0:02
20K
12.43 mi11:34:081:28:207:0623:08
7:27
+0:25
Half
13.11 mi11:38:541:33:067:064:46
6:59
-0:28
25K
15.53 mi11:56:521:51:047:0917:58
7:25
+0:26
30K
18.64 mi12:22:312:16:437:2025:39
8:15
+0:50
20M
20.00 mi12:34:352:28:477:2612:04
8:53
+0:38
21M
21.00 mi12:44:392:38:517:3410:04
10:04
+1:11
35K
21.75 mi12:50:572:45:097:366:18
8:25
-1:39
23M
23.00 mi13:03:212:57:337:4312:24
9:54
+1:29
24M
24.00 mi13:12:193:06:317:468:58
8:58
-0:56
40K
24.85 mi13:20:253:14:377:508:06
9:28
+0:30
25.2M
25.20 mi13:24:173:18:297:533:52
11:13
+1:45
Finish
26.22 mi13:33:193:27:317:559:02
8:52
-2:21

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

6:57 /mi

Average Pace

7:55 /mi

Slowest Pace

11:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:51:04

54% of race

Time at Steady Pace

1:02:01

30% of race

Time at Slower Pace

34:26

17% of race

Average Pace: 7:55 /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 mi10:27:2521:376:5721:37
6:57
#6790
10K
6.21 mi10:49:1043:226:5921:45
7:00
#6708
15K
9.32 mi11:11:001:05:127:0021:50
7:02
#6577
20K
12.43 mi11:34:081:28:207:0623:08
7:27
#6841
Half
13.11 mi11:38:541:33:067:064:46
6:59
#6766
25K
15.53 mi11:56:521:51:047:0917:58
7:25
#6634
30K
18.64 mi12:22:312:16:437:2025:39
8:15
#7044
20M
20.00 mi12:34:352:28:477:2612:04
8:53
#7321
21M
21.00 mi12:44:392:38:517:3410:04
10:04
#7670
35K
21.75 mi12:50:572:45:097:366:18
8:25
#7717
23M
23.00 mi13:03:212:57:337:4312:24
9:54
#8191
24M
24.00 mi13:12:193:06:317:468:58
8:58
#8319
40K
24.85 mi13:20:253:14:377:508:06
9:28
#8500
25.2M
25.20 mi13:24:173:18:297:533:52
11:13
#8626
Finish
26.22 mi13:33:193:27:317:559:02
8:52
#8840
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi6790602560256386(Top 25%)5658(Top 39%)5658(Top 117%)
10K6.21 mi3.10 mi6708+825944+815944+816673(Top 26%)5890(Top 40%)5890(Top 121%)
15K9.32 mi3.11 mi6577+1315831+1135831+1136386(Top 25%)5658(Top 39%)5658(Top 117%)
20K12.43 mi3.11 mi6841-2645992-1615992-1617974(Top 31%)6583(Top 45%)6583(Top 136%)
Half13.11 mi0.68 mi6766+755942+505942+505696(Top 22%)5117(Top 35%)5117(Top 106%)
25K15.53 mi2.42 mi6634+1325808+1345808+1346469(Top 25%)5494(Top 38%)5494(Top 113%)
30K18.64 mi3.11 mi7044-4106028-2206028-2209309(Top 36%)6918(Top 47%)6918(Top 143%)
20M20.00 mi1.36 mi7321-2776161-1336161-13311478(Top 45%)7700(Top 53%)7700(Top 159%)
21M21.00 mi1.00 mi7670-3496306-1456306-14513208(Top 52%)8278(Top 57%)8278(Top 171%)
35K21.75 mi0.75 mi7717-476300+66300+610231(Top 40%)6848(Top 47%)6848(Top 141%)
23M23.00 mi1.25 mi8191-4746503-2036503-20315113(Top 59%)9100(Top 62%)9100(Top 188%)
24M24.00 mi1.00 mi8319-1286525-226525-2211946(Top 47%)7539(Top 52%)7539(Top 155%)
40K24.85 mi0.85 mi8500-1816585-606585-6012981(Top 51%)7915(Top 54%)7915(Top 163%)
25.2M25.20 mi0.35 mi8626-1266624-396624-3915118(Top 59%)8982(Top 62%)8982(Top 185%)
Finish26.22 mi1.02 mi8840-2146715-916715-9113491(Top 53%)8231(Top 56%)8231(Top 170%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 25%
×21stories
+97ft-345ft

Overall

6386

Males

5658

M18-39

5658

5K→10K

3.1 - 6.2 mi

Top 26%
×5stories
+79ft-138ft

Overall

6673

Males

5890

M18-39

5890

10K→15K

6.2 - 9.3 mi

Top 25%
×3stories
+67ft-78ft

Overall

6386

Males

5658

M18-39

5658

15K→20K

9.3 - 12.4 mi

Top 31%
×5stories
+106ft-86ft

Overall

7974

Males

6583

M18-39

6583

20K→Half

12.4 - 13.1 mi

Top 22%
×2stories
+19ft-37ft

Overall

5696

Males

5117

M18-39

5117

Half→25K

13.1 - 15.5 mi

Top 25%
×4stories
+66ft-88ft

Overall

6469

Males

5494

M18-39

5494

25K→30K

15.5 - 18.6 mi

Top 36%
×9stories
+181ft-148ft

Overall

9309

Males

6918

M18-39

6918

30K→20M

18.6 - 20.0 mi

Top 45%
×5stories
+64ft-50ft

Overall

11478

Males

7700

M18-39

7700

20M→21M

20.0 - 21.0 mi

Top 52%
×8stories
+106ft-24ft

Overall

13208

Males

8278

M18-39

8278

21M→35K

21.0 - 21.8 mi

Top 40%
×7stories
+17ft-86ft

Overall

10231

Males

6848

M18-39

6848

35K→23M

21.8 - 23.0 mi

Top 59%
×5stories
+23ft-63ft

Overall

15113

Males

9100

M18-39

9100

23M→24M

23.0 - 24.0 mi

Top 47%
×6stories
+12ft-82ft

Overall

11946

Males

7539

M18-39

7539

24M→40K

24.0 - 24.9 mi

Top 51%
×1story
+6ft-20ft

Overall

12981

Males

7915

M18-39

7915

40K→25.2M

24.9 - 25.2 mi

Top 59%
×1story
+13ft-16ft

Overall

15118

Males

8982

M18-39

8982

25.2M→Finish

25.2 - 26.2 mi

Top 53%
×2stories
+22ft-21ft

Overall

13491

Males

8231

M18-39

8231

Passing Analysis

Category:
Athletes Passed
1336
Passed By
3386
Net Change
-2050
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6790
5K → 10K242160+82#6790#6708
10K → 15K22089+131#6708#6577
15K → 20K96360-264#6577#6841
20K → Half783+75#6841#6766
Half → 25K22290+132#6766#6634
25K → 30K113523-410#6634#7044
30K → 20M56333-277#7044#7321
20M → 21M45394-349#7321#7670
21M → 35K61108-47#7670#7717
35K → 23M43517-474#7717#8191
23M → 24M62190-128#8191#8319
24M → 40K45226-181#8319#8500
40K → 25.2M18144-126#8500#8626
25.2M → Finish35249-214#8626#8840
TOTALS13363386-2050
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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