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BOSTON MARATHON 2024

Chi Sang Lee

Bib: 10559•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 25550
Gender (Male)
#0 / 14578
Masters (Masters Men)
#0 / 9729
Division (M50-54)
#0 / 1935
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:36
Rank: #11501
Start → 5K
7:36/mi
23:36 split
10K· 6.21 mi
48:06
Rank: #12420 (-919)
5K → 10K
7:53/mi
24:30 split
15K· 9.32 mi
1:13:08
Rank: #12887 (-467)
10K → 15K
8:03/mi
25:02 split
20K· 12.43 mi
1:38:22
Rank: #12751 (+136)
15K → 20K
8:07/mi
25:14 split
Half· 13.11 mi
1:43:59
Rank: #12838 (-87)
20K → Half
8:14/mi
5:37 split
25K· 15.53 mi
2:04:00
Rank: #12551 (+287)
Half → 25K
8:15/mi
20:01 split
30K· 18.64 mi
2:30:34
Rank: #12196 (+355)
25K → 30K
8:33/mi
26:34 split
20M
2:43:00
Rank: #12213 (-17)
30K → 20M
9:09/mi
12:26 split
21M
2:53:54
Rank: #12495 (-282)
20M → 21M
10:54/mi
10:54 split
35K· 21.75 mi
3:02:23
Rank: #12973 (-478)
21M → 35K
11:20/mi
8:29 split
23M
3:14:34
Rank: #13081 (-108)
35K → 23M
9:44/mi
12:11 split
24M
3:24:27
Rank: #13250 (-169)
23M → 24M
9:53/mi
9:53 split
40K· 24.85 mi
3:33:21
Rank: #13409 (-159)
24M → 40K
10:25/mi
8:54 split
25.2M
3:36:59
Rank: #13398 (+11)
40K → 25.2M
10:32/mi
3:38 split
Finish· 26.22 mi
3:46:10
Rank: #13410 (-12)
25.2M → Finish
9:01/mi
9:11 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:59
Pace7:56 /mi
2nd Half
Distance13.11 mi
Time2:02:11
Pace9:19 /mi
📊Positive Split: 17.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:3523:367:3623:36
7:36
-
10K
6.21 mi11:17:0548:067:4424:30
7:53
+0:17
15K
9.32 mi11:42:071:13:087:5125:02
8:03
+0:10
20K
12.43 mi12:07:211:38:227:5525:14
8:07
+0:04
Half
13.11 mi12:12:581:43:597:565:37
8:14
+0:07
25K
15.53 mi12:32:592:04:007:5920:01
8:15
+0:01
30K
18.64 mi12:59:332:30:348:0526:34
8:33
+0:18
20M
20.00 mi13:11:592:43:008:0912:26
9:09
+0:36
21M
21.00 mi13:22:532:53:548:1710:54
10:54
+1:45
35K
21.75 mi13:31:223:02:238:238:29
11:20
+0:26
23M
23.00 mi13:43:333:14:348:2812:11
9:44
-1:36
24M
24.00 mi13:53:263:24:278:319:53
9:53
+0:09
40K
24.85 mi14:02:203:33:218:358:54
10:25
+0:32
25.2M
25.20 mi14:05:583:36:598:373:38
10:32
+0:07
Finish
26.22 mi14:15:093:46:108:389:11
9:01
-1:31

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

7:36 /mi

Average Pace

8:38 /mi

Slowest Pace

11:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:04:00

55% of race

Time at Steady Pace

48:11

21% of race

Time at Slower Pace

53:59

24% of race

Average Pace: 8:38 /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 mi10:52:3523:367:3623:36
7:36
#11501
10K
6.21 mi11:17:0548:067:4424:30
7:53
#12420
15K
9.32 mi11:42:071:13:087:5125:02
8:03
#12887
20K
12.43 mi12:07:211:38:227:5525:14
8:07
#12751
Half
13.11 mi12:12:581:43:597:565:37
8:14
#12838
25K
15.53 mi12:32:592:04:007:5920:01
8:15
#12551
30K
18.64 mi12:59:332:30:348:0526:34
8:33
#12196
20M
20.00 mi13:11:592:43:008:0912:26
9:09
#12213
21M
21.00 mi13:22:532:53:548:1710:54
10:54
#12495
35K
21.75 mi13:31:223:02:238:238:29
11:20
#12973
23M
23.00 mi13:43:333:14:348:2812:11
9:44
#13081
24M
24.00 mi13:53:263:24:278:319:53
9:53
#13250
40K
24.85 mi14:02:203:33:218:358:54
10:25
#13409
25.2M
25.20 mi14:05:583:36:598:373:38
10:32
#13398
Finish
26.22 mi14:15:093:46:108:389:11
9:01
#13410
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi115018625862513823(Top 54%)9535(Top 65%)9535(Top 493%)
10K6.21 mi3.10 mi12420-9198984-3598984-35913317(Top 52%)9342(Top 64%)9342(Top 483%)
15K9.32 mi3.11 mi12887-4679169-1859169-18513823(Top 54%)9535(Top 65%)9535(Top 493%)
20K12.43 mi3.11 mi12751+1369095+749095+7412665(Top 50%)8975(Top 62%)8975(Top 464%)
Half13.11 mi0.68 mi12838-879117-229117-2214150(Top 55%)9551(Top 66%)9551(Top 494%)
25K15.53 mi2.42 mi12551+2878959+1588959+15811710(Top 46%)8340(Top 57%)8340(Top 431%)
30K18.64 mi3.11 mi12196+3558710+2498710+24910905(Top 43%)7748(Top 53%)7748(Top 400%)
20M20.00 mi1.36 mi12213-178669+418669+4112855(Top 50%)8339(Top 57%)8339(Top 431%)
21M21.00 mi1.00 mi12495-2828726-578726-5716064(Top 63%)9661(Top 66%)9661(Top 499%)
35K21.75 mi0.75 mi12973-4788889-1638889-16320493(Top 80%)11859(Top 81%)11859(Top 613%)
23M23.00 mi1.25 mi13081-1088869+208869+2014459(Top 57%)8784(Top 60%)8784(Top 454%)
24M24.00 mi1.00 mi13250-1698899-308899-3015900(Top 62%)9466(Top 65%)9466(Top 489%)
40K24.85 mi0.85 mi13409-1598937-388937-3816404(Top 64%)9670(Top 66%)9670(Top 500%)
25.2M25.20 mi0.35 mi13398+118914+238914+2312917(Top 51%)7838(Top 54%)7838(Top 405%)
Finish26.22 mi1.02 mi13410-128883+318883+3114255(Top 56%)8621(Top 59%)8621(Top 446%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 54%
×21story building
+97ft-345ft

Overall

13823

Males

9535

M50-54

9535

5K→10K

3.1 - 6.2 mi

Top 52%
×5story building
+79ft-138ft

Overall

13317

Males

9342

M50-54

9342

10K→15K

6.2 - 9.3 mi

Top 54%
×3story building
+67ft-78ft

Overall

13823

Males

9535

M50-54

9535

15K→20K

9.3 - 12.4 mi

Top 50%
×5story building
+106ft-86ft

Overall

12665

Males

8975

M50-54

8975

20K→Half

12.4 - 13.1 mi

Top 55%
×2story building
+19ft-37ft

Overall

14150

Males

9551

M50-54

9551

Half→25K

13.1 - 15.5 mi

Top 46%
×4story building
+66ft-88ft

Overall

11710

Males

8340

M50-54

8340

25K→30K

15.5 - 18.6 mi

Top 43%
×9story building
+181ft-148ft

Overall

10905

Males

7748

M50-54

7748

30K→20M

18.6 - 20.0 mi

Top 50%
×5story building
+64ft-50ft

Overall

12855

Males

8339

M50-54

8339

20M→21M

20.0 - 21.0 mi

Top 63%
×8story building
+106ft-24ft

Overall

16064

Males

9661

M50-54

9661

21M→35K

21.0 - 21.8 mi

Top 80%
×7story building
+17ft-86ft

Overall

20493

Males

11859

M50-54

11859

35K→23M

21.8 - 23.0 mi

Top 57%
×5story building
+23ft-63ft

Overall

14459

Males

8784

M50-54

8784

23M→24M

23.0 - 24.0 mi

Top 62%
×6story building
+12ft-82ft

Overall

15900

Males

9466

M50-54

9466

24M→40K

24.0 - 24.9 mi

Top 64%
×1story
+6ft-20ft

Overall

16404

Males

9670

M50-54

9670

40K→25.2M

24.9 - 25.2 mi

Top 51%
×1story
+13ft-16ft

Overall

12917

Males

7838

M50-54

7838

25.2M→Finish

25.2 - 26.2 mi

Top 56%
×2story building
+22ft-21ft

Overall

14255

Males

8621

M50-54

8621

Passing Analysis

Category:
Athletes Passed
1949
Passed By
3858
Net Change
-1909
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11501
5K → 10K62981-919#11501#12420
10K → 15K104571-467#12420#12887
15K → 20K332196+136#12887#12751
20K → Half29116-87#12751#12838
Half → 25K37891+287#12838#12551
25K → 30K480125+355#12551#12196
30K → 20M141158-17#12196#12213
20M → 21M62344-282#12213#12495
21M → 35K18496-478#12495#12973
35K → 23M106214-108#12973#13081
23M → 24M50219-169#13081#13250
24M → 40K54213-159#13250#13409
40K → 25.2M5746+11#13409#13398
25.2M → Finish7688-12#13398#13410
TOTALS19493858-1909
📊

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