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BOSTON MARATHON 2025

Walden Hoi Ming Lam

Bib: 27825•M

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

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:21/mi
25:56
↑ 97↓ 3451.5%
10K· 6.21 mi
8:07/mi
51:08
↑ 79↓ 1380.4%
15K· 9.32 mi
8:08/mi
1:16:25
↑ 67↓ 78
20K· 12.43 mi
8:18/mi
1:42:11
↑ 106↓ 860.1%
Half· 13.11 mi
8:11/mi
1:47:46
↑ 19↓ 370.5%
25K· 15.53 mi
8:23/mi
2:08:06
↑ 66↓ 880.2%
30K· 18.64 mi
8:32/mi
2:34:37
↑ 181↓ 1480.2%
20M
8:35/mi
2:46:17
↑ 64↓ 500.2%
21M
8:56/mi
2:55:13
↑ 106↓ 241.6%
35K· 21.75 mi
8:27/mi
3:01:32
↑ 17↓ 861.7%
23M
8:31/mi
3:12:12
↑ 23↓ 630.6%
24M
9:06/mi
3:21:18
↓ 821.3%
40K· 24.85 mi
8:35/mi
3:28:38
↓ 200.3%
25.2M
9:25/mi
3:31:53
↑ 13↓ 160.2%
Finish· 26.22 mi
8:19/mi
3:40:22
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:47:46
Pace8:13 /mi
2nd Half
Distance13.11 mi
Time1:52:36
Pace8:35 /mi
📊Positive Split: 4.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:42:5125:568:2125:56
8:21
-
10K
6.21 mi12:08:0351:088:1425:12
8:07
-0:14
15K
9.32 mi12:33:201:16:258:1225:17
8:08
+0:01
20K
12.43 mi12:59:061:42:118:1325:46
8:18
+0:10
Half
13.11 mi13:04:411:47:468:135:35
8:11
-0:07
25K
15.53 mi13:25:012:08:068:1520:20
8:23
+0:12
30K
18.64 mi13:51:322:34:378:1826:31
8:32
+0:09
20M
20.00 mi14:03:122:46:178:1911:40
8:35
+0:03
21M
21.00 mi14:12:082:55:138:218:56
8:56
+0:21
35K
21.75 mi14:18:273:01:328:216:19
8:27
-0:29
23M
23.00 mi14:29:073:12:128:2110:40
8:31
+0:04
24M
24.00 mi14:38:133:21:188:239:06
9:06
+0:35
40K
24.85 mi14:45:333:28:388:247:20
8:35
-0:31
25.2M
25.20 mi14:48:483:31:538:243:15
9:25
+0:50
Finish
26.22 mi14:57:173:40:228:258:29
8:19
-1:06

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

8:07 /mi

Average Pace

8:25 /mi

Slowest Pace

9:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:19:05

90% of race

Time at Steady Pace

21:17

10% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:24 /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 mi11:42:5125:568:2125:56
8:21
#18989
10K
6.21 mi12:08:0351:088:1425:12
8:07
#18161
15K
9.32 mi12:33:201:16:258:1225:17
8:08
#17744
20K
12.43 mi12:59:061:42:118:1325:46
8:18
#17494
Half
13.11 mi13:04:411:47:468:135:35
8:11
#17469
25K
15.53 mi13:25:012:08:068:1520:20
8:23
#17251
30K
18.64 mi13:51:322:34:378:1826:31
8:32
#16803
20M
20.00 mi14:03:122:46:178:1911:40
8:35
#16596
21M
21.00 mi14:12:082:55:138:218:56
8:56
#16350
35K
21.75 mi14:18:273:01:328:216:19
8:27
#16271
23M
23.00 mi14:29:073:12:128:2110:40
8:31
#16052
24M
24.00 mi14:38:133:21:188:239:06
9:06
#16121
40K
24.85 mi14:45:333:28:388:247:20
8:35
#16041
25.2M
25.20 mi14:48:483:31:538:243:15
9:25
#15996
Finish
26.22 mi14:57:173:40:228:258:29
8:19
#15965
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi18989120301203016988(Top 60%)11209(Top 70%)11209(Top 199%)
10K6.21 mi3.10 mi18161+82811681+34911681+34917271(Top 61%)11353(Top 70%)11353(Top 201%)
15K9.32 mi3.11 mi17744+41711517+16411517+16416988(Top 60%)11209(Top 70%)11209(Top 199%)
20K12.43 mi3.11 mi17494+25011416+10111416+10116892(Top 59%)11128(Top 69%)11128(Top 197%)
Half13.11 mi0.68 mi17469+2511403+1311403+1317125(Top 60%)11226(Top 70%)11226(Top 199%)
25K15.53 mi2.42 mi17251+21811286+11711286+11716470(Top 58%)10851(Top 67%)10851(Top 192%)
30K18.64 mi3.11 mi16803+44811055+23111055+23114972(Top 53%)10044(Top 62%)10044(Top 178%)
20M20.00 mi1.36 mi16596+20710939+11610939+11614334(Top 50%)9616(Top 60%)9616(Top 170%)
21M21.00 mi1.00 mi16350+24610805+13410805+13413123(Top 46%)8915(Top 55%)8915(Top 158%)
35K21.75 mi0.75 mi16271+7910750+5510750+5515118(Top 53%)9783(Top 61%)9783(Top 173%)
23M23.00 mi1.25 mi16052+21910625+12510625+12513418(Top 47%)8903(Top 55%)8903(Top 158%)
24M24.00 mi1.00 mi16121-6910630-510630-517851(Top 63%)10854(Top 67%)10854(Top 192%)
40K24.85 mi0.85 mi16041+8010569+6110569+6113916(Top 49%)8965(Top 56%)8965(Top 159%)
25.2M25.20 mi0.35 mi15996+4510535+3410535+3414120(Top 50%)9005(Top 56%)9005(Top 160%)
Finish26.22 mi1.02 mi15965+3110510+2510510+2515059(Top 53%)9509(Top 59%)9509(Top 169%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 60%
×21story building
+97ft-345ft

Overall

16988

Males

11209

M18-39

11209

5K→10K

3.1 - 6.2 mi

Top 61%
×5story building
+79ft-138ft

Overall

17271

Males

11353

M18-39

11353

10K→15K

6.2 - 9.3 mi

Top 60%
×3story building
+67ft-78ft

Overall

16988

Males

11209

M18-39

11209

15K→20K

9.3 - 12.4 mi

Top 59%
×5story building
+106ft-86ft

Overall

16892

Males

11128

M18-39

11128

20K→Half

12.4 - 13.1 mi

Top 60%
×2story building
+19ft-37ft

Overall

17125

Males

11226

M18-39

11226

Half→25K

13.1 - 15.5 mi

Top 58%
×4story building
+66ft-88ft

Overall

16470

Males

10851

M18-39

10851

25K→30K

15.5 - 18.6 mi

Top 53%
×9story building
+181ft-148ft

Overall

14972

Males

10044

M18-39

10044

30K→20M

18.6 - 20.0 mi

Top 50%
×5story building
+64ft-50ft

Overall

14334

Males

9616

M18-39

9616

20M→21M

20.0 - 21.0 mi

Top 46%
×8story building
+106ft-24ft

Overall

13123

Males

8915

M18-39

8915

21M→35K

21.0 - 21.8 mi

Top 53%
×7story building
+17ft-86ft

Overall

15118

Males

9783

M18-39

9783

35K→23M

21.8 - 23.0 mi

Top 47%
×5story building
+23ft-63ft

Overall

13418

Males

8903

M18-39

8903

23M→24M

23.0 - 24.0 mi

Top 63%
×6story building
+12ft-82ft

Overall

17851

Males

10854

M18-39

10854

24M→40K

24.0 - 24.9 mi

Top 49%
×1story
+6ft-20ft

Overall

13916

Males

8965

M18-39

8965

40K→25.2M

24.9 - 25.2 mi

Top 50%
×1story
+13ft-16ft

Overall

14120

Males

9005

M18-39

9005

25.2M→Finish

25.2 - 26.2 mi

Top 53%
×2story building
+22ft-21ft

Overall

15059

Males

9509

M18-39

9509

Passing Analysis

Category:
Athletes Passed
3565
Passed By
541
Net Change
+3024
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18989
5K → 10K88052+828#18989#18161
10K → 15K46346+417#18161#17744
15K → 20K31666+250#17744#17494
20K → Half4217+25#17494#17469
Half → 25K28466+218#17469#17251
25K → 30K48133+448#17251#16803
30K → 20M22013+207#16803#16596
20M → 21M25812+246#16596#16350
21M → 35K9819+79#16350#16271
35K → 23M23415+219#16271#16052
23M → 24M49118-69#16052#16121
24M → 40K10222+80#16121#16041
40K → 25.2M5611+45#16041#15996
25.2M → Finish8251+31#15996#15965
TOTALS3565541+3024
📊

Passing Visuals

Category:
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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