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BOSTON MARATHON 2024

Chang Hai Lee

Bib: 29664•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 25550
Top 27%
Gender (Male)
#0 / 14578
Top 38%
Masters (Masters Men)
#0 / 9729
Top 27%
Division (M40-44)
#0 / 2009
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:56
Rank: #9776
Start → 5K
22:56 | 7:23/mi
10K· 6.21 mi
43:52
Rank: #7199 (+2577)
5K → 10K
20:56 | 6:44/mi
15K· 9.32 mi
1:05:33
Rank: #6799 (+400)
10K → 15K
21:41 | 6:59/mi
20K· 12.43 mi
1:28:21
Rank: #6847 (-48)
15K → 20K
22:48 | 7:20/mi
Half· 13.11 mi
1:33:33
Rank: #6974 (-127)
20K → Half
5:12 | 7:37/mi
25K· 15.53 mi
1:51:50
Rank: #6934 (+40)
Half → 25K
18:17 | 7:32/mi
30K· 18.64 mi
2:16:17
Rank: #6896 (+38)
25K → 30K
24:27 | 7:52/mi
20M
2:27:23
Rank: #6866 (+30)
30K → 20M
11:06 | 8:10/mi
21M
2:36:08
Rank: #6775 (+91)
20M → 21M
8:45 | 8:45/mi
35K· 21.75 mi
2:41:48
Rank: #6667 (+108)
21M → 35K
5:40 | 7:34/mi
23M
2:52:26
Rank: #6673 (-6)
35K → 23M
10:38 | 8:30/mi
24M
3:00:48
Rank: #6714 (-41)
23M → 24M
8:22 | 8:22/mi
40K· 24.85 mi
3:08:13
Rank: #6756 (-42)
24M → 40K
7:25 | 8:40/mi
25.2M
3:11:41
Rank: #6841 (-85)
40K → 25.2M
3:28 | 10:03/mi
Finish· 26.22 mi
3:19:33
Rank: #6781 (+60)
25.2M → Finish
7:52 | 7:43/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:33:33
Pace7:08 /mi
2nd Half
Distance13.11 mi
Time1:46:00
Pace8:05 /mi
📊Positive Split: 13.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:44:5322:567:2322:56
7:23
-
10K
6.21 mi12:05:4943:527:0420:56
6:44
-0:39
15K
9.32 mi12:27:301:05:337:0221:41
6:59
+0:15
20K
12.43 mi12:50:181:28:217:0722:48
7:20
+0:21
Half
13.11 mi12:55:301:33:337:085:12
7:37
+0:17
25K
15.53 mi13:13:471:51:507:1218:17
7:32
-0:05
30K
18.64 mi13:38:142:16:177:1924:27
7:52
+0:20
20M
20.00 mi13:49:202:27:237:2211:06
8:10
+0:18
21M
21.00 mi13:58:052:36:087:268:45
8:45
+0:35
35K
21.75 mi14:03:452:41:487:265:40
7:34
-1:11
23M
23.00 mi14:14:232:52:267:3010:38
8:30
+0:56
24M
24.00 mi14:22:453:00:487:328:22
8:22
-0:08
40K
24.85 mi14:30:103:08:137:347:25
8:40
+0:18
25.2M
25.20 mi14:33:383:11:417:363:28
10:03
+1:23
Finish
26.22 mi14:41:303:19:337:377:52
7:43
-2:20

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

6:44 /mi

Average Pace

7:37 /mi

Slowest Pace

10:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

42:37

21% of race

Time at Steady Pace

1:47:12

54% of race

Time at Slower Pace

49:44

25% of race

Average Pace: 7:37 /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 mi11:44:5322:567:2322:56
7:23
#9776
10K
6.21 mi12:05:4943:527:0420:56
6:44
#7199
15K
9.32 mi12:27:301:05:337:0221:41
6:59
#6799
20K
12.43 mi12:50:181:28:217:0722:48
7:20
#6847
Half
13.11 mi12:55:301:33:337:085:12
7:37
#6974
25K
15.53 mi13:13:471:51:507:1218:17
7:32
#6934
30K
18.64 mi13:38:142:16:177:1924:27
7:52
#6896
20M
20.00 mi13:49:202:27:237:2211:06
8:10
#6866
21M
21.00 mi13:58:052:36:087:268:45
8:45
#6775
35K
21.75 mi14:03:452:41:487:265:40
7:34
#6667
23M
23.00 mi14:14:232:52:267:3010:38
8:30
#6673
24M
24.00 mi14:22:453:00:487:328:22
8:22
#6714
40K
24.85 mi14:30:103:08:137:347:25
8:40
#6756
25.2M
25.20 mi14:33:383:11:417:363:28
10:03
#6841
Finish
26.22 mi14:41:303:19:337:377:52
7:43
#6781
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi9776782778276086(Top 24%)5441(Top 37%)5441(Top 271%)
10K6.21 mi3.10 mi7199+25776284+15436284+15434649(Top 18%)4327(Top 30%)4327(Top 215%)
15K9.32 mi3.11 mi6799+4005985+2995985+2996086(Top 24%)5441(Top 37%)5441(Top 271%)
20K12.43 mi3.11 mi6847-485996-115996-117228(Top 28%)6128(Top 42%)6128(Top 305%)
Half13.11 mi0.68 mi6974-1276070-746070-749927(Top 39%)7624(Top 52%)7624(Top 379%)
25K15.53 mi2.42 mi6934+406009+616009+617228(Top 28%)5958(Top 41%)5958(Top 297%)
30K18.64 mi3.11 mi6896+385924+855924+857107(Top 28%)5690(Top 39%)5690(Top 283%)
20M20.00 mi1.36 mi6866+305867+575867+577650(Top 30%)5805(Top 40%)5805(Top 289%)
21M21.00 mi1.00 mi6775+915761+1065761+1067363(Top 29%)5461(Top 37%)5461(Top 272%)
35K21.75 mi0.75 mi6667+1085658+1035658+1035417(Top 21%)4341(Top 30%)4341(Top 216%)
23M23.00 mi1.25 mi6673-65614+445614+448424(Top 33%)5809(Top 40%)5809(Top 289%)
24M24.00 mi1.00 mi6714-415605+95605+98634(Top 34%)5828(Top 40%)5828(Top 290%)
40K24.85 mi0.85 mi6756-425582+235582+239227(Top 36%)6002(Top 41%)6002(Top 299%)
25.2M25.20 mi0.35 mi6841-855621-395621-3911082(Top 43%)6907(Top 47%)6907(Top 344%)
Finish26.22 mi1.02 mi6781+605552+695552+696836(Top 27%)4780(Top 33%)4780(Top 238%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 24%
×21stories
+97ft-345ft

Overall

6086

Males

5441

M40-44

5441

5K→10K

3.1 - 6.2 mi

Top 18%
×5stories
+79ft-138ft

Overall

4649

Males

4327

M40-44

4327

10K→15K

6.2 - 9.3 mi

Top 24%
×3stories
+67ft-78ft

Overall

6086

Males

5441

M40-44

5441

15K→20K

9.3 - 12.4 mi

Top 28%
×5stories
+106ft-86ft

Overall

7228

Males

6128

M40-44

6128

20K→Half

12.4 - 13.1 mi

Top 39%
×2stories
+19ft-37ft

Overall

9927

Males

7624

M40-44

7624

Half→25K

13.1 - 15.5 mi

Top 28%
×4stories
+66ft-88ft

Overall

7228

Males

5958

M40-44

5958

25K→30K

15.5 - 18.6 mi

Top 28%
×9stories
+181ft-148ft

Overall

7107

Males

5690

M40-44

5690

30K→20M

18.6 - 20.0 mi

Top 30%
×5stories
+64ft-50ft

Overall

7650

Males

5805

M40-44

5805

20M→21M

20.0 - 21.0 mi

Top 29%
×8stories
+106ft-24ft

Overall

7363

Males

5461

M40-44

5461

21M→35K

21.0 - 21.8 mi

Top 21%
×7stories
+17ft-86ft

Overall

5417

Males

4341

M40-44

4341

35K→23M

21.8 - 23.0 mi

Top 33%
×5stories
+23ft-63ft

Overall

8424

Males

5809

M40-44

5809

23M→24M

23.0 - 24.0 mi

Top 34%
×6stories
+12ft-82ft

Overall

8634

Males

5828

M40-44

5828

24M→40K

24.0 - 24.9 mi

Top 36%
×1story
+6ft-20ft

Overall

9227

Males

6002

M40-44

6002

40K→25.2M

24.9 - 25.2 mi

Top 43%
×1story
+13ft-16ft

Overall

11082

Males

6907

M40-44

6907

25.2M→Finish

25.2 - 26.2 mi

Top 27%
×2stories
+22ft-21ft

Overall

6836

Males

4780

M40-44

4780

Passing Analysis

Category:
Athletes Passed
4383
Passed By
1388
Net Change
+2995
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9776
5K → 10K25770+2577#9776#7199
10K → 15K41616+400#7199#6799
15K → 20K146194-48#6799#6847
20K → Half7134-127#6847#6974
Half → 25K186146+40#6974#6934
25K → 30K237199+38#6934#6896
30K → 20M132102+30#6896#6866
20M → 21M16170+91#6866#6775
21M → 35K12719+108#6775#6667
35K → 23M121127-6#6667#6673
23M → 24M76117-41#6673#6714
24M → 40K85127-42#6714#6756
40K → 25.2M15100-85#6756#6841
25.2M → Finish9737+60#6841#6781
TOTALS43831388+2995
📊

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