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BOSTON MARATHON 2025

Willis Lam

Bib: 29320•X

0:00
0:00
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Overall
#0 / 28404
Gender (Other)
#0 / 71
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:12
Rank: #21266
Start → 5K
27:12 | 8:45/mi
10K· 6.21 mi
54:20
Rank: #21122 (+144)
5K → 10K
27:08 | 8:44/mi
15K· 9.32 mi
1:21:28
Rank: #20949 (+173)
10K → 15K
27:08 | 8:44/mi
20K· 12.43 mi
1:49:33
Rank: #21002 (-53)
15K → 20K
28:05 | 9:02/mi
Half· 13.11 mi
1:55:21
Rank: #20920 (+82)
20K → Half
5:48 | 8:30/mi
25K· 15.53 mi
2:18:21
Rank: #21130 (-210)
Half → 25K
23:00 | 9:29/mi
30K· 18.64 mi
2:49:18
Rank: #21256 (-126)
25K → 30K
30:57 | 9:58/mi
20M
3:04:21
Rank: #21542 (-286)
30K → 20M
15:03 | 11:04/mi
21M
3:17:40
Rank: #21954 (-412)
20M → 21M
13:19 | 13:19/mi
35K· 21.75 mi
3:25:33
Rank: #22003 (-49)
21M → 35K
7:53 | 10:32/mi
23M
3:39:05
Rank: #22043 (-40)
35K → 23M
13:32 | 10:49/mi
24M
3:49:46
Rank: #22102 (-59)
23M → 24M
10:41 | 10:41/mi
40K· 24.85 mi
4:00:04
Rank: #22266 (-164)
24M → 40K
10:18 | 12:03/mi
25.2M
4:04:18
Rank: #22285 (-19)
40K → 25.2M
4:14 | 12:17/mi
Finish· 26.22 mi
4:14:26
Rank: #22278 (+7)
25.2M → Finish
10:08 | 9:57/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:55:21
Pace8:48 /mi
2nd Half
Distance13.11 mi
Time2:19:05
Pace10:37 /mi
📊Positive Split: 20.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:48:1427:128:4527:12
8:45
-
10K
6.21 mi12:15:2254:208:4527:08
8:44
-0:01
15K
9.32 mi12:42:301:21:288:4427:08
8:44
0:00
20K
12.43 mi13:10:351:49:338:4928:05
9:02
+0:18
Half
13.11 mi13:16:231:55:218:485:48
8:30
-0:32
25K
15.53 mi13:39:232:18:218:5423:00
9:29
+0:59
30K
18.64 mi14:10:202:49:189:0530:57
9:58
+0:29
20M
20.00 mi14:25:233:04:219:1315:03
11:04
+1:06
21M
21.00 mi14:38:423:17:409:2513:19
13:19
+2:15
35K
21.75 mi14:46:353:25:339:277:53
10:32
-2:47
23M
23.00 mi15:00:073:39:059:3213:32
10:49
+0:17
24M
24.00 mi15:10:483:49:469:3410:41
10:41
-0:08
40K
24.85 mi15:21:064:00:049:4010:18
12:03
+1:22
25.2M
25.20 mi15:25:204:04:189:424:14
12:17
+0:14
Finish
26.22 mi15:35:284:14:269:4310:08
9:57
-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

8:30 /mi

Average Pace

9:43 /mi

Slowest Pace

13:19 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:55:21

45% of race

Time at Steady Pace

1:11:58

28% of race

Time at Slower Pace

1:07:07

26% of race

Average Pace: 9:42 /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 mi11:48:1427:128:4527:12
8:45
#21266
10K
6.21 mi12:15:2254:208:4527:08
8:44
#21122
15K
9.32 mi12:42:301:21:288:4427:08
8:44
#20949
20K
12.43 mi13:10:351:49:338:4928:05
9:02
#21002
Half
13.11 mi13:16:231:55:218:485:48
8:30
#20920
25K
15.53 mi13:39:232:18:218:5423:00
9:29
#21130
30K
18.64 mi14:10:202:49:189:0530:57
9:58
#21256
20M
20.00 mi14:25:233:04:219:1315:03
11:04
#21542
21M
21.00 mi14:38:423:17:409:2513:19
13:19
#21954
35K
21.75 mi14:46:353:25:339:277:53
10:32
#22003
23M
23.00 mi15:00:073:39:059:3213:32
10:49
#22043
24M
24.00 mi15:10:483:49:469:3410:41
10:41
#22102
40K
24.85 mi15:21:064:00:049:4010:18
12:03
#22266
25.2M
25.20 mi15:25:204:04:189:424:14
12:17
#22285
Finish
26.22 mi15:35:284:14:269:4310:08
9:57
#22278
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallXAge DivSeg. OverallSeg. XSeg. Age Div
5K3.11 mi3.11 mi21266606020659(Top 73%)57(Top 80%)57
10K6.21 mi3.10 mi21122+144606021059(Top 74%)60(Top 85%)60
15K9.32 mi3.11 mi20949+17359+159+120659(Top 73%)57(Top 80%)57
20K12.43 mi3.11 mi21002-53595921159(Top 74%)57(Top 80%)57
Half13.11 mi0.68 mi20920+82595919138(Top 67%)56(Top 79%)56
25K15.53 mi2.42 mi21130-210595921800(Top 77%)58(Top 82%)58
30K18.64 mi3.11 mi21256-126595921482(Top 76%)57(Top 80%)57
20M20.00 mi1.36 mi21542-28660-160-123732(Top 84%)62(Top 87%)62
21M21.00 mi1.00 mi21954-412606025456(Top 90%)66(Top 93%)66
35K21.75 mi0.75 mi22003-49606023241(Top 82%)60(Top 85%)60
23M23.00 mi1.25 mi22043-4059+159+122756(Top 80%)57(Top 80%)57
24M24.00 mi1.00 mi22102-5960-160-123261(Top 82%)58(Top 82%)58
40K24.85 mi0.85 mi22266-164606024988(Top 88%)64(Top 90%)64
25.2M25.20 mi0.35 mi22285-19606023713(Top 83%)62(Top 87%)62
Finish26.22 mi1.02 mi22278+759+159+122735(Top 80%)58(Top 82%)58

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 73%
×21stories
+97ft-345ft

Overall

20659

X

57

Age Div

57

5K→10K

3.1 - 6.2 mi

Top 74%
×5stories
+79ft-138ft

Overall

21059

X

60

Age Div

60

10K→15K

6.2 - 9.3 mi

Top 73%
×3stories
+67ft-78ft

Overall

20659

X

57

Age Div

57

15K→20K

9.3 - 12.4 mi

Top 74%
×5stories
+106ft-86ft

Overall

21159

X

57

Age Div

57

20K→Half

12.4 - 13.1 mi

Top 67%
×2stories
+19ft-37ft

Overall

19138

X

56

Age Div

56

Half→25K

13.1 - 15.5 mi

Top 77%
×4stories
+66ft-88ft

Overall

21800

X

58

Age Div

58

25K→30K

15.5 - 18.6 mi

Top 76%
×9stories
+181ft-148ft

Overall

21482

X

57

Age Div

57

30K→20M

18.6 - 20.0 mi

Top 84%
×5stories
+64ft-50ft

Overall

23732

X

62

Age Div

62

20M→21M

20.0 - 21.0 mi

Top 90%
×8stories
+106ft-24ft

Overall

25456

X

66

Age Div

66

21M→35K

21.0 - 21.8 mi

Top 82%
×7stories
+17ft-86ft

Overall

23241

X

60

Age Div

60

35K→23M

21.8 - 23.0 mi

Top 80%
×5stories
+23ft-63ft

Overall

22756

X

57

Age Div

57

23M→24M

23.0 - 24.0 mi

Top 82%
×6stories
+12ft-82ft

Overall

23261

X

58

Age Div

58

24M→40K

24.0 - 24.9 mi

Top 88%
×1story
+6ft-20ft

Overall

24988

X

64

Age Div

64

40K→25.2M

24.9 - 25.2 mi

Top 83%
×1story
+13ft-16ft

Overall

23713

X

62

Age Div

62

25.2M→Finish

25.2 - 26.2 mi

Top 80%
×2stories
+22ft-21ft

Overall

22735

X

58

Age Div

58

Passing Analysis

Category:
Athletes Passed
1384
Passed By
2396
Net Change
-1012
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21266
5K → 10K349205+144#21266#21122
10K → 15K278105+173#21122#20949
15K → 20K174227-53#20949#21002
20K → Half908+82#21002#20920
Half → 25K87297-210#20920#21130
25K → 30K171297-126#21130#21256
30K → 20M31317-286#21256#21542
20M → 21M18430-412#21542#21954
21M → 35K2170-49#21954#22003
35K → 23M68108-40#22003#22043
23M → 24M3089-59#22043#22102
24M → 40K15179-164#22102#22266
40K → 25.2M1231-19#22266#22285
25.2M → Finish4033+7#22285#22278
TOTALS13842396-1012
📊

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