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BOSTON MARATHON 2024

Chang Tai Li

Bib: 2682•M

0:00
0:00
/ mi
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Overall
#0 / 25550
Top 16%
Gender (Male)
#0 / 14578
Top 25%
Division (M18-39)
#0 / 4849
Top 48%
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:58
Rank: #5209
Start → 5K
6:45/mi
20:58 split
10K· 6.21 mi
42:23
Rank: #5585 (-376)
5K → 10K
6:54/mi
21:25 split
15K· 9.32 mi
1:03:27
Rank: #5243 (+342)
10K → 15K
6:47/mi
21:04 split
20K· 12.43 mi
1:24:36
Rank: #4809 (+434)
15K → 20K
6:48/mi
21:09 split
Half· 13.11 mi
1:29:12
Rank: #4744 (+65)
20K → Half
6:45/mi
4:36 split
25K· 15.53 mi
1:45:52
Rank: #4463 (+281)
Half → 25K
6:52/mi
16:40 split
30K· 18.64 mi
2:07:54
Rank: #4158 (+305)
25K → 30K
7:06/mi
22:02 split
20M
2:17:30
Rank: #3921 (+237)
30K → 20M
7:04/mi
9:36 split
21M
2:25:15
Rank: #3812 (+109)
20M → 21M
7:45/mi
7:45 split
35K· 21.75 mi
2:30:34
Rank: #3769 (+43)
21M → 35K
7:06/mi
5:19 split
23M
2:40:17
Rank: #3767 (+2)
35K → 23M
7:46/mi
9:43 split
24M
2:48:36
Rank: #3899 (-132)
23M → 24M
8:19/mi
8:19 split
40K· 24.85 mi
2:56:02
Rank: #4006 (-107)
24M → 40K
8:42/mi
7:26 split
25.2M
2:59:09
Rank: #4013 (-7)
40K → 25.2M
9:02/mi
3:07 split
Finish· 26.22 mi
3:07:20
Rank: #4123 (-110)
25.2M → Finish
8:02/mi
8:11 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:29:12
Pace6:48 /mi
2nd Half
Distance13.11 mi
Time1:38:08
Pace7:29 /mi
📊Positive Split: 10.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:3520:586:4520:58
6:45
-
10K
6.21 mi10:44:0042:236:4921:25
6:54
+0:09
15K
9.32 mi11:05:041:03:276:4821:04
6:47
-0:07
20K
12.43 mi11:26:131:24:366:4821:09
6:48
+0:01
Half
13.11 mi11:30:491:29:126:484:36
6:45
-0:03
25K
15.53 mi11:47:291:45:526:4916:40
6:52
+0:07
30K
18.64 mi12:09:312:07:546:5222:02
7:06
+0:14
20M
20.00 mi12:19:072:17:306:529:36
7:04
-0:02
21M
21.00 mi12:26:522:25:156:557:45
7:45
+0:41
35K
21.75 mi12:32:112:30:346:555:19
7:06
-0:39
23M
23.00 mi12:41:542:40:176:589:43
7:46
+0:40
24M
24.00 mi12:50:132:48:367:028:19
8:19
+0:33
40K
24.85 mi12:57:392:56:027:057:26
8:42
+0:23
25.2M
25.20 mi13:00:462:59:097:073:07
9:02
+0:20
Finish
26.22 mi13:08:573:07:207:098:11
8:02
-1:00

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

6:45 /mi

Average Pace

7:09 /mi

Slowest Pace

9:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:22:49

76% of race

Time at Slower Pace

44:31

24% of race

Average Pace: 7:09 /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 mi10:22:3520:586:4520:58
6:45
#5209
10K
6.21 mi10:44:0042:236:4921:25
6:54
#5585
15K
9.32 mi11:05:041:03:276:4821:04
6:47
#5243
20K
12.43 mi11:26:131:24:366:4821:09
6:48
#4809
Half
13.11 mi11:30:491:29:126:484:36
6:45
#4744
25K
15.53 mi11:47:291:45:526:4916:40
6:52
#4463
30K
18.64 mi12:09:312:07:546:5222:02
7:06
#4158
20M
20.00 mi12:19:072:17:306:529:36
7:04
#3921
21M
21.00 mi12:26:522:25:156:557:45
7:45
#3812
35K
21.75 mi12:32:112:30:346:555:19
7:06
#3769
23M
23.00 mi12:41:542:40:176:589:43
7:46
#3767
24M
24.00 mi12:50:132:48:367:028:19
8:19
#3899
40K
24.85 mi12:57:392:56:027:057:26
8:42
#4006
25.2M
25.20 mi13:00:462:59:097:073:07
9:02
#4013
Finish
26.22 mi13:08:573:07:207:098:11
8:02
#4123
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi5209480848084559(Top 18%)4247(Top 29%)4247(Top 88%)
10K6.21 mi3.10 mi5585-3765109-3015109-3015932(Top 23%)5355(Top 37%)5355(Top 110%)
15K9.32 mi3.11 mi5243+3424841+2684841+2684559(Top 18%)4247(Top 29%)4247(Top 88%)
20K12.43 mi3.11 mi4809+4344459+3824459+3823911(Top 15%)3664(Top 25%)3664(Top 76%)
Half13.11 mi0.68 mi4744+654407+524407+524092(Top 16%)3816(Top 26%)3816(Top 79%)
25K15.53 mi2.42 mi4463+2814153+2544153+2543642(Top 14%)3392(Top 23%)3392(Top 70%)
30K18.64 mi3.11 mi4158+3053875+2783875+2783312(Top 13%)3049(Top 21%)3049(Top 63%)
20M20.00 mi1.36 mi3921+2373659+2163659+2162638(Top 10%)2450(Top 17%)2450(Top 51%)
21M21.00 mi1.00 mi3812+1093548+1113548+1113304(Top 13%)2950(Top 20%)2950(Top 61%)
35K21.75 mi0.75 mi3769+433504+443504+443447(Top 13%)3054(Top 21%)3054(Top 63%)
23M23.00 mi1.25 mi3767+23487+173487+174615(Top 18%)3755(Top 26%)3755(Top 77%)
24M24.00 mi1.00 mi3899-1323580-933580-938340(Top 33%)5663(Top 39%)5663(Top 117%)
40K24.85 mi0.85 mi4006-1073646-663646-669323(Top 36%)6043(Top 41%)6043(Top 125%)
25.2M25.20 mi0.35 mi4013-73642+43642+46634(Top 26%)4605(Top 32%)4605(Top 95%)
Finish26.22 mi1.02 mi4123-1103708-663708-668656(Top 34%)5728(Top 39%)5728(Top 118%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 18%
×21story building
+97ft-345ft

Overall

4559

Males

4247

M18-39

4247

5K→10K

3.1 - 6.2 mi

Top 23%
×5story building
+79ft-138ft

Overall

5932

Males

5355

M18-39

5355

10K→15K

6.2 - 9.3 mi

Top 18%
×3story building
+67ft-78ft

Overall

4559

Males

4247

M18-39

4247

15K→20K

9.3 - 12.4 mi

Top 15%
×5story building
+106ft-86ft

Overall

3911

Males

3664

M18-39

3664

20K→Half

12.4 - 13.1 mi

Top 16%
×2story building
+19ft-37ft

Overall

4092

Males

3816

M18-39

3816

Half→25K

13.1 - 15.5 mi

Top 14%
×4story building
+66ft-88ft

Overall

3642

Males

3392

M18-39

3392

25K→30K

15.5 - 18.6 mi

Top 13%
×9story building
+181ft-148ft

Overall

3312

Males

3049

M18-39

3049

30K→20M

18.6 - 20.0 mi

Top 10%
×5story building
+64ft-50ft

Overall

2638

Males

2450

M18-39

2450

20M→21M

20.0 - 21.0 mi

Top 13%
×8story building
+106ft-24ft

Overall

3304

Males

2950

M18-39

2950

21M→35K

21.0 - 21.8 mi

Top 13%
×7story building
+17ft-86ft

Overall

3447

Males

3054

M18-39

3054

35K→23M

21.8 - 23.0 mi

Top 18%
×5story building
+23ft-63ft

Overall

4615

Males

3755

M18-39

3755

23M→24M

23.0 - 24.0 mi

Top 33%
×6story building
+12ft-82ft

Overall

8340

Males

5663

M18-39

5663

24M→40K

24.0 - 24.9 mi

Top 36%
×1story
+6ft-20ft

Overall

9323

Males

6043

M18-39

6043

40K→25.2M

24.9 - 25.2 mi

Top 26%
×1story
+13ft-16ft

Overall

6634

Males

4605

M18-39

4605

25.2M→Finish

25.2 - 26.2 mi

Top 34%
×2story building
+22ft-21ft

Overall

8656

Males

5728

M18-39

5728

Passing Analysis

Category:
Athletes Passed
2273
Passed By
1187
Net Change
+1086
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5209
5K → 10K84460-376#5209#5585
10K → 15K35816+342#5585#5243
15K → 20K44612+434#5243#4809
20K → Half705+65#4809#4744
Half → 25K31029+281#4744#4463
25K → 30K35954+305#4463#4158
30K → 20M2458+237#4158#3921
20M → 21M13930+109#3921#3812
21M → 35K7027+43#3812#3769
35K → 23M9088+2#3769#3767
23M → 24M27159-132#3767#3899
24M → 40K27134-107#3899#4006
40K → 25.2M2633-7#4006#4013
25.2M → Finish22132-110#4013#4123
TOTALS22731187+1086
📊

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