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BOSTON MARATHON 2024

David Cai

Bib: 480•M

PA

0:00
0:00
/ mi
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Overall
#0 / 25550
Top 4%
Gender (Male)
#0 / 14578
Top 7%
Division (M18-39)
#0 / 4849
Top 18%
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
17:52
Rank: #445
Start → 5K
17:52 | 5:45/mi
10K· 6.21 mi
35:49
Rank: #434 (+11)
5K → 10K
17:57 | 5:47/mi
15K· 9.32 mi
54:08
Rank: #460 (-26)
10K → 15K
18:19 | 5:54/mi
20K· 12.43 mi
1:13:20
Rank: #545 (-85)
15K → 20K
19:12 | 6:11/mi
Half· 13.11 mi
1:17:29
Rank: #563 (-18)
20K → Half
4:09 | 6:05/mi
25K· 15.53 mi
1:32:57
Rank: #653 (-90)
Half → 25K
15:28 | 6:23/mi
30K· 18.64 mi
1:53:32
Rank: #737 (-84)
25K → 30K
20:35 | 6:38/mi
20M
2:02:46
Rank: #760 (-23)
30K → 20M
9:14 | 6:48/mi
21M
2:10:21
Rank: #829 (-69)
20M → 21M
7:35 | 7:35/mi
35K· 21.75 mi
2:15:23
Rank: #836 (-7)
21M → 35K
5:02 | 6:44/mi
23M
2:25:03
Rank: #950 (-114)
35K → 23M
9:40 | 7:43/mi
24M
2:32:41
Rank: #1052 (-102)
23M → 24M
7:38 | 7:38/mi
40K· 24.85 mi
2:39:12
Rank: #1104 (-52)
24M → 40K
6:31 | 7:37/mi
25.2M
2:42:03
Rank: #1134 (-30)
40K → 25.2M
2:51 | 8:16/mi
Finish· 26.22 mi
2:48:52
Rank: #1141 (-7)
25.2M → Finish
6:49 | 6:41/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:17:29
Pace5:55 /mi
2nd Half
Distance13.11 mi
Time1:31:23
Pace6:58 /mi
📊Positive Split: 17.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:18:0017:525:4517:52
5:45
-
10K
6.21 mi10:35:5735:495:4617:57
5:47
+0:02
15K
9.32 mi10:54:1654:085:4818:19
5:54
+0:07
20K
12.43 mi11:13:281:13:205:5419:12
6:11
+0:17
Half
13.11 mi11:17:371:17:295:554:09
6:05
-0:06
25K
15.53 mi11:33:051:32:575:5915:28
6:23
+0:18
30K
18.64 mi11:53:401:53:326:0520:35
6:38
+0:15
20M
20.00 mi12:02:542:02:466:089:14
6:48
+0:10
21M
21.00 mi12:10:292:10:216:127:35
7:35
+0:47
35K
21.75 mi12:15:312:15:236:145:02
6:44
-0:51
23M
23.00 mi12:25:112:25:036:189:40
7:43
+0:59
24M
24.00 mi12:32:492:32:416:227:38
7:38
-0:05
40K
24.85 mi12:39:202:39:126:246:31
7:37
-0:01
25.2M
25.20 mi12:42:112:42:036:262:51
8:16
+0:39
Finish
26.22 mi12:49:002:48:526:276:49
6:41
-1:35

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

5:45 /mi

Average Pace

6:27 /mi

Slowest Pace

8:16 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:17:29

46% of race

Time at Steady Pace

57:08

34% of race

Time at Slower Pace

34:15

20% of race

Average Pace: 6:26 /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 mi10:18:0017:525:4517:52
5:45
#445
10K
6.21 mi10:35:5735:495:4617:57
5:47
#434
15K
9.32 mi10:54:1654:085:4818:19
5:54
#460
20K
12.43 mi11:13:281:13:205:5419:12
6:11
#545
Half
13.11 mi11:17:371:17:295:554:09
6:05
#563
25K
15.53 mi11:33:051:32:575:5915:28
6:23
#653
30K
18.64 mi11:53:401:53:326:0520:35
6:38
#737
20M
20.00 mi12:02:542:02:466:089:14
6:48
#760
21M
21.00 mi12:10:292:10:216:127:35
7:35
#829
35K
21.75 mi12:15:312:15:236:145:02
6:44
#836
23M
23.00 mi12:25:112:25:036:189:40
7:43
#950
24M
24.00 mi12:32:492:32:416:227:38
7:38
#1052
40K
24.85 mi12:39:202:39:126:246:31
7:37
#1104
25.2M
25.20 mi12:42:112:42:036:262:51
8:16
#1134
Finish
26.22 mi12:49:002:48:526:276:49
6:41
#1141
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi445423423532(Top 2%)510(Top 3%)510(Top 11%)
10K6.21 mi3.10 mi434+11412+11412+11421(Top 2%)399(Top 3%)399(Top 8%)
15K9.32 mi3.11 mi460-26438-26438-26532(Top 2%)510(Top 3%)510(Top 11%)
20K12.43 mi3.11 mi545-85523-85523-851012(Top 4%)976(Top 7%)976(Top 20%)
Half13.11 mi0.68 mi563-18541-18541-18998(Top 4%)964(Top 7%)964(Top 20%)
25K15.53 mi2.42 mi653-90629-88629-881367(Top 5%)1320(Top 9%)1320(Top 27%)
30K18.64 mi3.11 mi737-84707-78707-781402(Top 5%)1341(Top 9%)1341(Top 28%)
20M20.00 mi1.36 mi760-23730-23730-231565(Top 6%)1483(Top 10%)1483(Top 31%)
21M21.00 mi1.00 mi829-69796-66796-662741(Top 11%)2483(Top 17%)2483(Top 51%)
35K21.75 mi0.75 mi836-7803-7803-71966(Top 8%)1813(Top 12%)1813(Top 37%)
23M23.00 mi1.25 mi950-114910-107910-1074445(Top 17%)3643(Top 25%)3643(Top 75%)
24M24.00 mi1.00 mi1052-1021008-981008-984656(Top 18%)3691(Top 25%)3691(Top 76%)
40K24.85 mi0.85 mi1104-521057-491057-493957(Top 15%)3171(Top 22%)3171(Top 65%)
25.2M25.20 mi0.35 mi1134-301087-301087-303521(Top 14%)2852(Top 20%)2852(Top 59%)
Finish26.22 mi1.02 mi1141-71091-41091-41937(Top 8%)1697(Top 12%)1697(Top 35%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 2%
×21stories
+97ft-345ft

Overall

532

Males

510

M18-39

510

5K→10K

3.1 - 6.2 mi

Top 2%
×5stories
+79ft-138ft

Overall

421

Males

399

M18-39

399

10K→15K

6.2 - 9.3 mi

Top 2%
×3stories
+67ft-78ft

Overall

532

Males

510

M18-39

510

15K→20K

9.3 - 12.4 mi

Top 4%
×5stories
+106ft-86ft

Overall

1012

Males

976

M18-39

976

20K→Half

12.4 - 13.1 mi

Top 4%
×2stories
+19ft-37ft

Overall

998

Males

964

M18-39

964

Half→25K

13.1 - 15.5 mi

Top 5%
×4stories
+66ft-88ft

Overall

1367

Males

1320

M18-39

1320

25K→30K

15.5 - 18.6 mi

Top 5%
×9stories
+181ft-148ft

Overall

1402

Males

1341

M18-39

1341

30K→20M

18.6 - 20.0 mi

Top 6%
×5stories
+64ft-50ft

Overall

1565

Males

1483

M18-39

1483

20M→21M

20.0 - 21.0 mi

Top 11%
×8stories
+106ft-24ft

Overall

2741

Males

2483

M18-39

2483

21M→35K

21.0 - 21.8 mi

Top 8%
×7stories
+17ft-86ft

Overall

1966

Males

1813

M18-39

1813

35K→23M

21.8 - 23.0 mi

Top 17%
×5stories
+23ft-63ft

Overall

4445

Males

3643

M18-39

3643

23M→24M

23.0 - 24.0 mi

Top 18%
×6stories
+12ft-82ft

Overall

4656

Males

3691

M18-39

3691

24M→40K

24.0 - 24.9 mi

Top 15%
×1story
+6ft-20ft

Overall

3957

Males

3171

M18-39

3171

40K→25.2M

24.9 - 25.2 mi

Top 14%
×1story
+13ft-16ft

Overall

3521

Males

2852

M18-39

2852

25.2M→Finish

25.2 - 26.2 mi

Top 8%
×2stories
+22ft-21ft

Overall

1937

Males

1697

M18-39

1697

Passing Analysis

Category:
Athletes Passed
156
Passed By
852
Net Change
-696
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#445
5K → 10K2514+11#445#434
10K → 15K935-26#434#460
15K → 20K994-85#460#545
20K → Half119-18#545#563
Half → 25K14104-90#563#653
25K → 30K23107-84#653#737
30K → 20M1740-23#737#760
20M → 21M271-69#760#829
21M → 35K1118-7#829#836
35K → 23M3117-114#836#950
23M → 24M2104-102#950#1052
24M → 40K860-52#1052#1104
40K → 25.2M535-30#1104#1134
25.2M → Finish2734-7#1134#1141
TOTALS156852-696
📊

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