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BOSTON MARATHON 2025

Chung Wai Lam

Bib: 11606•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M45-49)
#0 / 2386
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
7:10/mi
22:15
↑ 97↓ 3451.5%
10K· 6.21 mi
7:08/mi
44:26
↑ 79↓ 1380.4%
15K· 9.32 mi
7:12/mi
1:06:47
↑ 67↓ 78
20K· 12.43 mi
7:15/mi
1:29:19
↑ 106↓ 860.1%
Half· 13.11 mi
7:09/mi
1:34:12
↑ 19↓ 370.5%
25K· 15.53 mi
7:23/mi
1:52:05
↑ 66↓ 880.2%
30K· 18.64 mi
8:03/mi
2:17:05
↑ 181↓ 1480.2%
20M
10:25/mi
2:31:15
↑ 64↓ 500.2%
21M
13:47/mi
2:45:02
↑ 106↓ 241.6%
35K· 21.75 mi
8:44/mi
2:51:34
↑ 17↓ 861.7%
23M
9:08/mi
3:03:00
↑ 23↓ 630.6%
24M
9:53/mi
3:12:53
↓ 821.3%
40K· 24.85 mi
10:27/mi
3:21:49
↓ 200.3%
25.2M
9:11/mi
3:24:59
↑ 13↓ 160.2%
Finish· 26.22 mi
8:56/mi
3:34:05
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:34:12
Pace7:11 /mi
2nd Half
Distance13.11 mi
Time1:59:53
Pace9:09 /mi
📊Positive Split: 27.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:4222:157:1022:15
7:10
-
10K
6.21 mi11:12:5344:267:0922:11
7:08
-0:02
15K
9.32 mi11:35:141:06:477:1022:21
7:12
+0:04
20K
12.43 mi11:57:461:29:197:1122:32
7:15
+0:03
Half
13.11 mi12:02:391:34:127:114:53
7:09
-0:06
25K
15.53 mi12:20:321:52:057:1317:53
7:23
+0:14
30K
18.64 mi12:45:322:17:057:2125:00
8:03
+0:40
20M
20.00 mi12:59:422:31:157:3414:10
10:25
+2:22
21M
21.00 mi13:13:292:45:027:5213:47
13:47
+3:22
35K
21.75 mi13:20:012:51:347:536:32
8:44
-5:03
23M
23.00 mi13:31:273:03:007:5711:26
9:08
+0:24
24M
24.00 mi13:41:203:12:538:029:53
9:53
+0:45
40K
24.85 mi13:50:163:21:498:078:56
10:27
+0:34
25.2M
25.20 mi13:53:263:24:598:083:10
9:11
-1:16
Finish
26.22 mi14:02:323:34:058:109:06
8:56
-0:15

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

7:08 /mi

Average Pace

8:10 /mi

Slowest Pace

13:47 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:52:05

52% of race

Time at Steady Pace

55:14

26% of race

Time at Slower Pace

46:46

22% of race

Average Pace: 8:10 /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 mi10:50:4222:157:1022:15
7:10
#9142
10K
6.21 mi11:12:5344:267:0922:11
7:08
#9037
15K
9.32 mi11:35:141:06:477:1022:21
7:12
#9027
20K
12.43 mi11:57:461:29:197:1122:32
7:15
#8866
Half
13.11 mi12:02:391:34:127:114:53
7:09
#8845
25K
15.53 mi12:20:321:52:057:1317:53
7:23
#8807
30K
18.64 mi12:45:322:17:057:2125:00
8:03
#9306
20M
20.00 mi12:59:422:31:157:3414:10
10:25
#10789
21M
21.00 mi13:13:292:45:027:5213:47
13:47
#12769
35K
21.75 mi13:20:012:51:347:536:32
8:44
#12930
23M
23.00 mi13:31:273:03:007:5711:26
9:08
#13200
24M
24.00 mi13:41:203:12:538:029:53
9:53
#13690
40K
24.85 mi13:50:163:21:498:078:56
10:27
#14190
25.2M
25.20 mi13:53:263:24:598:083:10
9:11
#14155
Finish
26.22 mi14:02:323:34:058:109:06
8:56
#14316
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi9142769476949060(Top 32%)7588(Top 47%)7588(Top 318%)
10K6.21 mi3.10 mi9037+1057626+687626+688997(Top 32%)7603(Top 47%)7603(Top 319%)
15K9.32 mi3.11 mi9027+107599+277599+279060(Top 32%)7588(Top 47%)7588(Top 318%)
20K12.43 mi3.11 mi8866+1617486+1137486+1138647(Top 30%)7253(Top 45%)7253(Top 304%)
Half13.11 mi0.68 mi8845+217463+237463+238740(Top 31%)7352(Top 46%)7352(Top 308%)
25K15.53 mi2.42 mi8807+387423+407423+408961(Top 32%)7320(Top 45%)7320(Top 307%)
30K18.64 mi3.11 mi9306-4997640-2177640-21711710(Top 41%)8531(Top 53%)8531(Top 358%)
20M20.00 mi1.36 mi10789-14838358-7188358-71822206(Top 78%)13130(Top 82%)13130(Top 550%)
21M21.00 mi1.00 mi12769-19809251-8939251-89325978(Top 91%)14875(Top 92%)14875(Top 623%)
35K21.75 mi0.75 mi12930-1619310-599310-5916841(Top 59%)10537(Top 65%)10537(Top 442%)
23M23.00 mi1.25 mi13200-2709379-699379-6916978(Top 60%)10491(Top 65%)10491(Top 440%)
24M24.00 mi1.00 mi13690-4909567-1889567-18820980(Top 74%)12330(Top 77%)12330(Top 517%)
40K24.85 mi0.85 mi14190-5009765-1989765-19821752(Top 77%)12627(Top 78%)12627(Top 529%)
25.2M25.20 mi0.35 mi14155+359741+249741+2412744(Top 45%)8329(Top 52%)8329(Top 349%)
Finish26.22 mi1.02 mi14316-1619785-449785-4418642(Top 66%)11186(Top 69%)11186(Top 469%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 32%
×21story building
+97ft-345ft

Overall

9060

Males

7588

M45-49

7588

5K→10K

3.1 - 6.2 mi

Top 32%
×5story building
+79ft-138ft

Overall

8997

Males

7603

M45-49

7603

10K→15K

6.2 - 9.3 mi

Top 32%
×3story building
+67ft-78ft

Overall

9060

Males

7588

M45-49

7588

15K→20K

9.3 - 12.4 mi

Top 30%
×5story building
+106ft-86ft

Overall

8647

Males

7253

M45-49

7253

20K→Half

12.4 - 13.1 mi

Top 31%
×2story building
+19ft-37ft

Overall

8740

Males

7352

M45-49

7352

Half→25K

13.1 - 15.5 mi

Top 32%
×4story building
+66ft-88ft

Overall

8961

Males

7320

M45-49

7320

25K→30K

15.5 - 18.6 mi

Top 41%
×9story building
+181ft-148ft

Overall

11710

Males

8531

M45-49

8531

30K→20M

18.6 - 20.0 mi

Top 78%
×5story building
+64ft-50ft

Overall

22206

Males

13130

M45-49

13130

20M→21M

20.0 - 21.0 mi

Top 91%
×8story building
+106ft-24ft

Overall

25978

Males

14875

M45-49

14875

21M→35K

21.0 - 21.8 mi

Top 59%
×7story building
+17ft-86ft

Overall

16841

Males

10537

M45-49

10537

35K→23M

21.8 - 23.0 mi

Top 60%
×5story building
+23ft-63ft

Overall

16978

Males

10491

M45-49

10491

23M→24M

23.0 - 24.0 mi

Top 74%
×6story building
+12ft-82ft

Overall

20980

Males

12330

M45-49

12330

24M→40K

24.0 - 24.9 mi

Top 77%
×1story
+6ft-20ft

Overall

21752

Males

12627

M45-49

12627

40K→25.2M

24.9 - 25.2 mi

Top 45%
×1story
+13ft-16ft

Overall

12744

Males

8329

M45-49

8329

25.2M→Finish

25.2 - 26.2 mi

Top 66%
×2story building
+22ft-21ft

Overall

18642

Males

11186

M45-49

11186

Passing Analysis

Category:
Athletes Passed
1199
Passed By
6371
Net Change
-5174
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9142
5K → 10K269164+105#9142#9037
10K → 15K172162+10#9037#9027
15K → 20K24281+161#9027#8866
20K → Half3817+21#8866#8845
Half → 25K173135+38#8845#8807
25K → 30K104603-499#8807#9306
30K → 20M61487-1483#9306#10789
20M → 21M01980-1980#10789#12769
21M → 35K23184-161#12769#12930
35K → 23M56326-270#12930#13200
23M → 24M16506-490#13200#13690
24M → 40K13513-500#13690#14190
40K → 25.2M5116+35#14190#14155
25.2M → Finish36197-161#14155#14316
TOTALS11996371-5174
📊

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