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BOSTON MARATHON 2025

Ming Kei Lau

Bib: 7191•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 30%
Gender (Male)
#0 / 16105
Top 43%
Masters (Masters Men)
#0 / 10463
Top 31%
Division (M40-44)
#0 / 2247
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:43
Rank: #5177
Start → 5K
20:43 | 6:40/mi
10K· 6.21 mi
42:02
Rank: #5979 (-802)
5K → 10K
21:19 | 6:52/mi
15K· 9.32 mi
1:03:13
Rank: #6031 (-52)
10K → 15K
21:11 | 6:49/mi
20K· 12.43 mi
1:24:49
Rank: #6172 (-141)
15K → 20K
21:36 | 6:57/mi
Half· 13.11 mi
1:29:24
Rank: #6125 (+47)
20K → Half
4:35 | 6:43/mi
25K· 15.53 mi
1:47:44
Rank: #6833 (-708)
Half → 25K
18:20 | 7:34/mi
30K· 18.64 mi
2:12:12
Rank: #7293 (-460)
25K → 30K
24:28 | 7:53/mi
20M
2:22:55
Rank: #7371 (-78)
30K → 20M
10:43 | 7:53/mi
21M
2:31:08
Rank: #7361 (+10)
20M → 21M
8:13 | 8:13/mi
35K· 21.75 mi
2:37:16
Rank: #7547 (-186)
21M → 35K
6:08 | 8:12/mi
23M
2:48:36
Rank: #8062 (-515)
35K → 23M
11:20 | 9:03/mi
24M
2:56:46
Rank: #8223 (-161)
23M → 24M
8:10 | 8:10/mi
40K· 24.85 mi
3:03:53
Rank: #8340 (-117)
24M → 40K
7:07 | 8:19/mi
25.2M
3:07:14
Rank: #8489 (-149)
40K → 25.2M
3:21 | 9:43/mi
Finish· 26.22 mi
3:15:11
Rank: #8616 (-127)
25.2M → Finish
7:57 | 7:48/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:29:24
Pace6:49 /mi
2nd Half
Distance13.11 mi
Time1:45:47
Pace8:04 /mi
📊Positive Split: 18.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:26:4220:436:4020:43
6:40
-
10K
6.21 mi10:48:0142:026:4621:19
6:52
+0:12
15K
9.32 mi11:09:121:03:136:4721:11
6:49
-0:03
20K
12.43 mi11:30:481:24:496:4921:36
6:57
+0:08
Half
13.11 mi11:35:231:29:246:494:35
6:43
-0:14
25K
15.53 mi11:53:431:47:446:5618:20
7:34
+0:51
30K
18.64 mi12:18:112:12:127:0624:28
7:53
+0:19
20M
20.00 mi12:28:542:22:557:0910:43
7:53
0:00
21M
21.00 mi12:37:072:31:087:128:13
8:13
+0:20
35K
21.75 mi12:43:152:37:167:146:08
8:12
-0:01
23M
23.00 mi12:54:352:48:367:2011:20
9:03
+0:51
24M
24.00 mi13:02:452:56:467:228:10
8:10
-0:53
40K
24.85 mi13:09:523:03:537:247:07
8:19
+0:09
25.2M
25.20 mi13:13:133:07:147:263:21
9:43
+1:24
Finish
26.22 mi13:21:103:15:117:277:57
7:48
-1:55

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

6:40 /mi

Average Pace

7:27 /mi

Slowest Pace

9:43 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:29:24

46% of race

Time at Steady Pace

1:23:59

43% of race

Time at Slower Pace

21:48

11% of race

Average Pace: 7:27 /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 mi10:26:4220:436:4020:43
6:40
#5177
10K
6.21 mi10:48:0142:026:4621:19
6:52
#5979
15K
9.32 mi11:09:121:03:136:4721:11
6:49
#6031
20K
12.43 mi11:30:481:24:496:4921:36
6:57
#6172
Half
13.11 mi11:35:231:29:246:494:35
6:43
#6125
25K
15.53 mi11:53:431:47:446:5618:20
7:34
#6833
30K
18.64 mi12:18:112:12:127:0624:28
7:53
#7293
20M
20.00 mi12:28:542:22:557:0910:43
7:53
#7371
21M
21.00 mi12:37:072:31:087:128:13
8:13
#7361
35K
21.75 mi12:43:152:37:167:146:08
8:12
#7547
23M
23.00 mi12:54:352:48:367:2011:20
9:03
#8062
24M
24.00 mi13:02:452:56:467:228:10
8:10
#8223
40K
24.85 mi13:09:523:03:537:247:07
8:19
#8340
25.2M
25.20 mi13:13:133:07:147:263:21
9:43
#8489
Finish
26.22 mi13:21:103:15:117:277:57
7:48
#8616
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi5177482548256274(Top 22%)5684(Top 35%)5684(Top 253%)
10K6.21 mi3.10 mi5979-8025491-6665491-6666967(Top 25%)6254(Top 39%)6254(Top 278%)
15K9.32 mi3.11 mi6031-525523-325523-326274(Top 22%)5684(Top 35%)5684(Top 253%)
20K12.43 mi3.11 mi6172-1415625-1025625-1026603(Top 23%)5909(Top 37%)5909(Top 263%)
Half13.11 mi0.68 mi6125+475582+435582+435495(Top 19%)5050(Top 31%)5050(Top 225%)
25K15.53 mi2.42 mi6833-7086120-5386120-53810426(Top 37%)8100(Top 50%)8100(Top 360%)
30K18.64 mi3.11 mi7293-4606418-2986418-29810440(Top 37%)7898(Top 49%)7898(Top 351%)
20M20.00 mi1.36 mi7371-786439-216439-219587(Top 34%)7300(Top 45%)7300(Top 325%)
21M21.00 mi1.00 mi7361+106400+396400+398668(Top 31%)6632(Top 41%)6632(Top 295%)
35K21.75 mi0.75 mi7547-1866490-906490-9013549(Top 48%)9042(Top 56%)9042(Top 402%)
23M23.00 mi1.25 mi8062-5156773-2836773-28316521(Top 58%)10289(Top 64%)10289(Top 458%)
24M24.00 mi1.00 mi8223-1616844-716844-7112304(Top 43%)8312(Top 52%)8312(Top 370%)
40K24.85 mi0.85 mi8340-1176885-416885-4112252(Top 43%)8159(Top 51%)8159(Top 363%)
25.2M25.20 mi0.35 mi8489-1496951-666951-6615584(Top 55%)9650(Top 60%)9650(Top 429%)
Finish26.22 mi1.02 mi8616-1276998-476998-4711408(Top 40%)7703(Top 48%)7703(Top 343%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 22%
×21stories
+97ft-345ft

Overall

6274

Males

5684

M40-44

5684

5K→10K

3.1 - 6.2 mi

Top 25%
×5stories
+79ft-138ft

Overall

6967

Males

6254

M40-44

6254

10K→15K

6.2 - 9.3 mi

Top 22%
×3stories
+67ft-78ft

Overall

6274

Males

5684

M40-44

5684

15K→20K

9.3 - 12.4 mi

Top 23%
×5stories
+106ft-86ft

Overall

6603

Males

5909

M40-44

5909

20K→Half

12.4 - 13.1 mi

Top 19%
×2stories
+19ft-37ft

Overall

5495

Males

5050

M40-44

5050

Half→25K

13.1 - 15.5 mi

Top 37%
×4stories
+66ft-88ft

Overall

10426

Males

8100

M40-44

8100

25K→30K

15.5 - 18.6 mi

Top 37%
×9stories
+181ft-148ft

Overall

10440

Males

7898

M40-44

7898

30K→20M

18.6 - 20.0 mi

Top 34%
×5stories
+64ft-50ft

Overall

9587

Males

7300

M40-44

7300

20M→21M

20.0 - 21.0 mi

Top 31%
×8stories
+106ft-24ft

Overall

8668

Males

6632

M40-44

6632

21M→35K

21.0 - 21.8 mi

Top 48%
×7stories
+17ft-86ft

Overall

13549

Males

9042

M40-44

9042

35K→23M

21.8 - 23.0 mi

Top 58%
×5stories
+23ft-63ft

Overall

16521

Males

10289

M40-44

10289

23M→24M

23.0 - 24.0 mi

Top 43%
×6stories
+12ft-82ft

Overall

12304

Males

8312

M40-44

8312

24M→40K

24.0 - 24.9 mi

Top 43%
×1story
+6ft-20ft

Overall

12252

Males

8159

M40-44

8159

40K→25.2M

24.9 - 25.2 mi

Top 55%
×1story
+13ft-16ft

Overall

15584

Males

9650

M40-44

9650

25.2M→Finish

25.2 - 26.2 mi

Top 40%
×2stories
+22ft-21ft

Overall

11408

Males

7703

M40-44

7703

Passing Analysis

Category:
Athletes Passed
740
Passed By
4179
Net Change
-3439
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5177
5K → 10K25827-802#5177#5979
10K → 15K117169-52#5979#6031
15K → 20K110251-141#6031#6172
20K → Half558+47#6172#6125
Half → 25K27735-708#6125#6833
25K → 30K71531-460#6833#7293
30K → 20M82160-78#7293#7371
20M → 21M8171+10#7371#7361
21M → 35K17203-186#7361#7547
35K → 23M24539-515#7547#8062
23M → 24M42203-161#8062#8223
24M → 40K40157-117#8223#8340
40K → 25.2M14163-149#8340#8489
25.2M → Finish35162-127#8489#8616
TOTALS7404179-3439
📊

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