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BOSTON MARATHON 2025

Dan Lau

Bib: 1302•M

WI

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 3%
Gender (Male)
#0 / 16105
Top 4%
Division (M18-39)
#0 / 5642
Top 11%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:26
Rank: #882
Start → 5K
18:26 | 5:56/mi
10K· 6.21 mi
36:57
Rank: #932 (-50)
5K → 10K
18:31 | 5:58/mi
15K· 9.32 mi
55:25
Rank: #912 (+20)
10K → 15K
18:28 | 5:57/mi
20K· 12.43 mi
1:13:55
Rank: #851 (+61)
15K → 20K
18:30 | 5:57/mi
Half· 13.11 mi
1:17:58
Rank: #858 (-7)
20K → Half
4:03 | 5:56/mi
25K· 15.53 mi
1:32:26
Rank: #824 (+34)
Half → 25K
14:28 | 5:58/mi
30K· 18.64 mi
1:51:32
Rank: #791 (+33)
25K → 30K
19:06 | 6:09/mi
20M
2:00:10
Rank: #792 (-1)
30K → 20M
8:38 | 6:21/mi
21M
2:06:44
Rank: #774 (+18)
20M → 21M
6:34 | 6:34/mi
35K· 21.75 mi
2:11:30
Rank: #785 (-11)
21M → 35K
4:46 | 6:22/mi
23M
2:19:21
Rank: #771 (+14)
35K → 23M
7:51 | 6:16/mi
24M
2:25:32
Rank: #764 (+7)
23M → 24M
6:11 | 6:11/mi
40K· 24.85 mi
2:30:54
Rank: #756 (+8)
24M → 40K
5:22 | 6:17/mi
25.2M
2:33:14
Rank: #755 (+1)
40K → 25.2M
2:20 | 6:46/mi
Finish· 26.22 mi
2:39:10
Rank: #729 (+26)
25.2M → Finish
5:56 | 5:49/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:17:58
Pace5:57 /mi
2nd Half
Distance13.11 mi
Time1:21:12
Pace6:12 /mi
📊Positive Split: 4.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:1218:265:5618:26
5:56
-
10K
6.21 mi10:37:4336:575:5718:31
5:58
+0:02
15K
9.32 mi10:56:1155:255:5718:28
5:57
-0:01
20K
12.43 mi11:14:411:13:555:5718:30
5:57
0:00
Half
13.11 mi11:18:441:17:585:574:03
5:56
-0:01
25K
15.53 mi11:33:121:32:265:5714:28
5:58
+0:02
30K
18.64 mi11:52:181:51:325:5919:06
6:09
+0:11
20M
20.00 mi12:00:562:00:106:008:38
6:21
+0:12
21M
21.00 mi12:07:302:06:446:026:34
6:34
+0:13
35K
21.75 mi12:12:162:11:306:034:46
6:22
-0:12
23M
23.00 mi12:20:072:19:216:047:51
6:16
-0:06
24M
24.00 mi12:26:182:25:326:046:11
6:11
-0:05
40K
24.85 mi12:31:402:30:546:045:22
6:17
+0:06
25.2M
25.20 mi12:34:002:33:146:052:20
6:46
+0:29
Finish
26.22 mi12:39:562:39:106:055:56
5:49
-0:57

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

5:49 /mi

Average Pace

6:05 /mi

Slowest Pace

6:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:30:16

94% of race

Time at Steady Pace

8:54

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:04 /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 mi10:19:1218:265:5618:26
5:56
#882
10K
6.21 mi10:37:4336:575:5718:31
5:58
#932
15K
9.32 mi10:56:1155:255:5718:28
5:57
#912
20K
12.43 mi11:14:411:13:555:5718:30
5:57
#851
Half
13.11 mi11:18:441:17:585:574:03
5:56
#858
25K
15.53 mi11:33:121:32:265:5714:28
5:58
#824
30K
18.64 mi11:52:181:51:325:5919:06
6:09
#791
20M
20.00 mi12:00:562:00:106:008:38
6:21
#792
21M
21.00 mi12:07:302:06:446:026:34
6:34
#774
35K
21.75 mi12:12:162:11:306:034:46
6:22
#785
23M
23.00 mi12:20:072:19:216:047:51
6:16
#771
24M
24.00 mi12:26:182:25:326:046:11
6:11
#764
40K
24.85 mi12:31:402:30:546:045:22
6:17
#756
25.2M
25.20 mi12:34:002:33:146:052:20
6:46
#755
Finish
26.22 mi12:39:562:39:106:055:56
5:49
#729
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi882825825868(Top 3%)816(Top 5%)816(Top 14%)
10K6.21 mi3.10 mi932-50877-52877-52989(Top 3%)934(Top 6%)934(Top 17%)
15K9.32 mi3.11 mi912+20857+20857+20868(Top 3%)816(Top 5%)816(Top 14%)
20K12.43 mi3.11 mi851+61800+57800+57755(Top 3%)707(Top 4%)707(Top 13%)
Half13.11 mi0.68 mi858-7807-7807-7914(Top 3%)864(Top 5%)864(Top 15%)
25K15.53 mi2.42 mi824+34772+35772+35718(Top 3%)670(Top 4%)670(Top 12%)
30K18.64 mi3.11 mi791+33742+30742+30778(Top 3%)730(Top 5%)730(Top 13%)
20M20.00 mi1.36 mi792-17427421088(Top 4%)1025(Top 6%)1025(Top 18%)
21M21.00 mi1.00 mi774+18724+18724+18816(Top 3%)771(Top 5%)771(Top 14%)
35K21.75 mi0.75 mi785-11735-11735-111853(Top 7%)1737(Top 11%)1737(Top 31%)
23M23.00 mi1.25 mi771+14722+13722+13804(Top 3%)759(Top 5%)759(Top 13%)
24M24.00 mi1.00 mi764+7715+7715+7959(Top 3%)901(Top 6%)901(Top 16%)
40K24.85 mi0.85 mi756+8707+8707+8901(Top 3%)843(Top 5%)843(Top 15%)
25.2M25.20 mi0.35 mi755+1706+1706+1864(Top 3%)797(Top 5%)797(Top 14%)
Finish26.22 mi1.02 mi729+26679+27679+27546(Top 2%)511(Top 3%)511(Top 9%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 3%
×21stories
+97ft-345ft

Overall

868

Males

816

M18-39

816

5K→10K

3.1 - 6.2 mi

Top 3%
×5stories
+79ft-138ft

Overall

989

Males

934

M18-39

934

10K→15K

6.2 - 9.3 mi

Top 3%
×3stories
+67ft-78ft

Overall

868

Males

816

M18-39

816

15K→20K

9.3 - 12.4 mi

Top 3%
×5stories
+106ft-86ft

Overall

755

Males

707

M18-39

707

20K→Half

12.4 - 13.1 mi

Top 3%
×2stories
+19ft-37ft

Overall

914

Males

864

M18-39

864

Half→25K

13.1 - 15.5 mi

Top 3%
×4stories
+66ft-88ft

Overall

718

Males

670

M18-39

670

25K→30K

15.5 - 18.6 mi

Top 3%
×9stories
+181ft-148ft

Overall

778

Males

730

M18-39

730

30K→20M

18.6 - 20.0 mi

Top 4%
×5stories
+64ft-50ft

Overall

1088

Males

1025

M18-39

1025

20M→21M

20.0 - 21.0 mi

Top 3%
×8stories
+106ft-24ft

Overall

816

Males

771

M18-39

771

21M→35K

21.0 - 21.8 mi

Top 7%
×7stories
+17ft-86ft

Overall

1853

Males

1737

M18-39

1737

35K→23M

21.8 - 23.0 mi

Top 3%
×5stories
+23ft-63ft

Overall

804

Males

759

M18-39

759

23M→24M

23.0 - 24.0 mi

Top 3%
×6stories
+12ft-82ft

Overall

959

Males

901

M18-39

901

24M→40K

24.0 - 24.9 mi

Top 3%
×1story
+6ft-20ft

Overall

901

Males

843

M18-39

843

40K→25.2M

24.9 - 25.2 mi

Top 3%
×1story
+13ft-16ft

Overall

864

Males

797

M18-39

797

25.2M→Finish

25.2 - 26.2 mi

Top 2%
×2stories
+22ft-21ft

Overall

546

Males

511

M18-39

511

Passing Analysis

Category:
Athletes Passed
380
Passed By
227
Net Change
+153
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#882
5K → 10K2979-50#882#932
10K → 15K3717+20#932#912
15K → 20K698+61#912#851
20K → Half29-7#851#858
Half → 25K4511+34#858#824
25K → 30K4916+33#824#791
30K → 20M2021-1#791#792
20M → 21M246+18#792#774
21M → 35K1122-11#774#785
35K → 23M2410+14#785#771
23M → 24M1710+7#771#764
24M → 40K179+8#764#756
40K → 25.2M65+1#756#755
25.2M → Finish304+26#755#729
TOTALS380227+153
📊

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