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BOSTON MARATHON 2025

Weng Hang Lam

Bib: 3434•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 14%
Gender (Male)
#0 / 16105
Top 23%
Division (M18-39)
#0 / 5642
Top 48%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:15
Rank: #3955
Start → 5K
20:15 | 6:31/mi
10K· 6.21 mi
40:33
Rank: #3956 (-1)
5K → 10K
20:18 | 6:32/mi
15K· 9.32 mi
1:00:53
Rank: #3901 (+55)
10K → 15K
20:20 | 6:33/mi
20K· 12.43 mi
1:21:40
Rank: #3951 (-50)
15K → 20K
20:47 | 6:41/mi
Half· 13.11 mi
1:26:10
Rank: #3966 (-15)
20K → Half
4:30 | 6:36/mi
25K· 15.53 mi
1:42:25
Rank: #3946 (+20)
Half → 25K
16:15 | 6:42/mi
30K· 18.64 mi
2:03:57
Rank: #3937 (+9)
25K → 30K
21:32 | 6:56/mi
20M
2:13:33
Rank: #3956 (-19)
30K → 20M
9:36 | 7:04/mi
21M
2:21:06
Rank: #3984 (-28)
20M → 21M
7:33 | 7:33/mi
35K· 21.75 mi
2:26:18
Rank: #4017 (-33)
21M → 35K
5:12 | 6:57/mi
23M
2:35:20
Rank: #4043 (-26)
35K → 23M
9:02 | 7:13/mi
24M
2:42:25
Rank: #4075 (-32)
23M → 24M
7:05 | 7:05/mi
40K· 24.85 mi
2:48:26
Rank: #4050 (+25)
24M → 40K
6:01 | 7:02/mi
25.2M
2:50:59
Rank: #4015 (+35)
40K → 25.2M
2:33 | 7:24/mi
Finish· 26.22 mi
2:57:47
Rank: #3976 (+39)
25.2M → Finish
6:48 | 6:40/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:26:10
Pace6:34 /mi
2nd Half
Distance13.11 mi
Time1:31:37
Pace6:59 /mi
📊Positive Split: 6.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:2320:156:3120:15
6:31
-
10K
6.21 mi10:42:4140:336:3220:18
6:32
+0:01
15K
9.32 mi11:03:011:00:536:3220:20
6:33
+0:01
20K
12.43 mi11:23:481:21:406:3420:47
6:41
+0:08
Half
13.11 mi11:28:181:26:106:344:30
6:36
-0:05
25K
15.53 mi11:44:331:42:256:3616:15
6:42
+0:06
30K
18.64 mi12:06:052:03:576:3921:32
6:56
+0:14
20M
20.00 mi12:15:412:13:336:419:36
7:04
+0:08
21M
21.00 mi12:23:142:21:066:437:33
7:33
+0:29
35K
21.75 mi12:28:262:26:186:445:12
6:57
-0:36
23M
23.00 mi12:37:282:35:206:459:02
7:13
+0:16
24M
24.00 mi12:44:332:42:256:467:05
7:05
-0:08
40K
24.85 mi12:50:342:48:266:476:01
7:02
-0:03
25.2M
25.20 mi12:53:072:50:596:472:33
7:24
+0:22
Finish
26.22 mi12:59:552:57:476:476:48
6:40
-0:44

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

6:31 /mi

Average Pace

6:47 /mi

Slowest Pace

7:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:38:39

89% of race

Time at Steady Pace

19:08

11% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:47 /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 mi10:22:2320:156:3120:15
6:31
#3955
10K
6.21 mi10:42:4140:336:3220:18
6:32
#3956
15K
9.32 mi11:03:011:00:536:3220:20
6:33
#3901
20K
12.43 mi11:23:481:21:406:3420:47
6:41
#3951
Half
13.11 mi11:28:181:26:106:344:30
6:36
#3966
25K
15.53 mi11:44:331:42:256:3616:15
6:42
#3946
30K
18.64 mi12:06:052:03:576:3921:32
6:56
#3937
20M
20.00 mi12:15:412:13:336:419:36
7:04
#3956
21M
21.00 mi12:23:142:21:066:437:33
7:33
#3984
35K
21.75 mi12:28:262:26:186:445:12
6:57
#4017
23M
23.00 mi12:37:282:35:206:459:02
7:13
#4043
24M
24.00 mi12:44:332:42:256:467:05
7:05
#4075
40K
24.85 mi12:50:342:48:266:476:01
7:02
#4050
25.2M
25.20 mi12:53:072:50:596:472:33
7:24
#4015
Finish
26.22 mi12:59:552:57:476:476:48
6:40
#3976
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3955374237423834(Top 13%)3618(Top 22%)3618(Top 64%)
10K6.21 mi3.10 mi3956-13740+23740+23969(Top 14%)3736(Top 23%)3736(Top 66%)
15K9.32 mi3.11 mi3901+553679+613679+613834(Top 13%)3618(Top 22%)3618(Top 64%)
20K12.43 mi3.11 mi3951-503721-423721-424327(Top 15%)4045(Top 25%)4045(Top 72%)
Half13.11 mi0.68 mi3966-153734-133734-134317(Top 15%)4039(Top 25%)4039(Top 72%)
25K15.53 mi2.42 mi3946+203714+203714+204141(Top 15%)3853(Top 24%)3853(Top 68%)
30K18.64 mi3.11 mi3937+93701+133701+134266(Top 15%)3916(Top 24%)3916(Top 69%)
20M20.00 mi1.36 mi3956-193714-133714-134452(Top 16%)4050(Top 25%)4050(Top 72%)
21M21.00 mi1.00 mi3984-283732-183732-184827(Top 17%)4237(Top 26%)4237(Top 75%)
35K21.75 mi0.75 mi4017-333754-223754-224999(Top 18%)4366(Top 27%)4366(Top 77%)
23M23.00 mi1.25 mi4043-263763-93763-94936(Top 17%)4262(Top 26%)4262(Top 76%)
24M24.00 mi1.00 mi4075-323784-213784-215099(Top 18%)4318(Top 27%)4318(Top 77%)
40K24.85 mi0.85 mi4050+253755+293755+294095(Top 14%)3553(Top 22%)3553(Top 63%)
25.2M25.20 mi0.35 mi4015+353719+363719+362899(Top 10%)2578(Top 16%)2578(Top 46%)
Finish26.22 mi1.02 mi3976+393674+453674+453710(Top 13%)3215(Top 20%)3215(Top 57%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 13%
×21stories
+97ft-345ft

Overall

3834

Males

3618

M18-39

3618

5K→10K

3.1 - 6.2 mi

Top 14%
×5stories
+79ft-138ft

Overall

3969

Males

3736

M18-39

3736

10K→15K

6.2 - 9.3 mi

Top 13%
×3stories
+67ft-78ft

Overall

3834

Males

3618

M18-39

3618

15K→20K

9.3 - 12.4 mi

Top 15%
×5stories
+106ft-86ft

Overall

4327

Males

4045

M18-39

4045

20K→Half

12.4 - 13.1 mi

Top 15%
×2stories
+19ft-37ft

Overall

4317

Males

4039

M18-39

4039

Half→25K

13.1 - 15.5 mi

Top 15%
×4stories
+66ft-88ft

Overall

4141

Males

3853

M18-39

3853

25K→30K

15.5 - 18.6 mi

Top 15%
×9stories
+181ft-148ft

Overall

4266

Males

3916

M18-39

3916

30K→20M

18.6 - 20.0 mi

Top 16%
×5stories
+64ft-50ft

Overall

4452

Males

4050

M18-39

4050

20M→21M

20.0 - 21.0 mi

Top 17%
×8stories
+106ft-24ft

Overall

4827

Males

4237

M18-39

4237

21M→35K

21.0 - 21.8 mi

Top 18%
×7stories
+17ft-86ft

Overall

4999

Males

4366

M18-39

4366

35K→23M

21.8 - 23.0 mi

Top 17%
×5stories
+23ft-63ft

Overall

4936

Males

4262

M18-39

4262

23M→24M

23.0 - 24.0 mi

Top 18%
×6stories
+12ft-82ft

Overall

5099

Males

4318

M18-39

4318

24M→40K

24.0 - 24.9 mi

Top 14%
×1story
+6ft-20ft

Overall

4095

Males

3553

M18-39

3553

40K→25.2M

24.9 - 25.2 mi

Top 10%
×1story
+13ft-16ft

Overall

2899

Males

2578

M18-39

2578

25.2M→Finish

25.2 - 26.2 mi

Top 13%
×2stories
+22ft-21ft

Overall

3710

Males

3215

M18-39

3215

Passing Analysis

Category:
Athletes Passed
972
Passed By
993
Net Change
-21
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3955
5K → 10K149150-1#3955#3956
10K → 15K12267+55#3956#3901
15K → 20K75125-50#3901#3951
20K → Half1429-15#3951#3966
Half → 25K8363+20#3966#3946
25K → 30K129120+9#3946#3937
30K → 20M4564-19#3937#3956
20M → 21M5886-28#3956#3984
21M → 35K3063-33#3984#4017
35K → 23M6187-26#4017#4043
23M → 24M4476-32#4043#4075
24M → 40K5025+25#4075#4050
40K → 25.2M416+35#4050#4015
25.2M → Finish7132+39#4015#3976
TOTALS972993-21
📊

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