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BOSTON MARATHON 2026

Chun Wa Lam

Bib: 29812•M

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0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Gender (Male)
#0 / 16340
Masters (Masters Men)
#0 / 10617
Age Group (M50-54)
#0 / 1868
Race Day Weather
51°/41°F
overcast clouds

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K
27:55
3.11 mi
Rank: #22599
Start → 5K
27:55 | 9:00/mi
10K
53:41
6.21 mi
Rank: #20988 (+1611)
5K → 10K
25:46 | 8:18/mi
15K
1:20:11
9.32 mi
Rank: #20738 (+250)
10K → 15K
26:30 | 8:32/mi
20K
1:47:53
12.43 mi
Rank: #20955 (-217)
15K → 20K
27:42 | 8:55/mi
HALF
1:53:58
13.11 mi
Rank: #21018 (-63)
20K → HALF
6:05 | 8:56/mi
25K
2:16:10
15.53 mi
Rank: #21169 (-151)
HALF → 25K
22:12 | 9:10/mi
30K
2:46:20
18.64 mi
Rank: #21409 (-240)
25K → 30K
30:10 | 9:43/mi
20M
3:00:48
20.00 mi
Rank: #21744 (-335)
30K → 20M
14:28 | 10:40/mi
21M
3:12:15
21.00 mi
Rank: #21922 (-178)
20M → 21M
11:27 | 11:27/mi
35K
3:20:10
21.75 mi
Rank: #22079 (-157)
21M → 35K
7:55 | 10:35/mi
23M
3:34:45
23.00 mi
Rank: #22430 (-351)
35K → 23M
14:35 | 11:40/mi
24M
3:46:29
24.00 mi
Rank: #22701 (-271)
23M → 24M
11:44 | 11:44/mi
40K
3:56:34
24.85 mi
Rank: #22839 (-138)
24M → 40K
10:05 | 11:48/mi
25.2M
4:01:39
25.20 mi
Rank: #22977 (-138)
40K → 25.2M
5:05 | 14:45/mi
FINISH
4:13:09
26.22 mi
Rank: #23132 (-155)
25.2M → FINISH
11:30 | 11:18/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:53:58
Pace8:42 /mi
2nd Half
Distance13.11 mi
Time2:19:11
Pace10:38 /mi
📊Positive Split: 22.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:4527:559:0027:55
9:00
-
10K
6.21 mi12:17:3153:418:3925:46
8:18
-0:42
15K
9.32 mi12:44:011:20:118:3726:30
8:32
+0:14
20K
12.43 mi13:11:431:47:538:4127:42
8:55
+0:23
HALF
13.11 mi13:17:481:53:588:426:05
8:56
+0:01
25K
15.53 mi13:40:002:16:108:4622:12
9:10
+0:14
30K
18.64 mi14:10:102:46:208:5630:10
9:43
+0:33
20M
20.00 mi14:24:383:00:489:0314:28
10:40
+0:57
21M
21.00 mi14:36:053:12:159:1011:27
11:27
+0:47
35K
21.75 mi14:44:003:20:109:137:55
10:35
-0:52
23M
23.00 mi14:58:353:34:459:2114:35
11:40
+1:05
24M
24.00 mi15:10:193:46:299:2711:44
11:44
+0:04
40K
24.85 mi15:20:243:56:349:3210:05
11:48
+0:04
25.2M
25.20 mi15:25:294:01:399:365:05
14:45
+2:57
FINISH
26.22 mi15:36:594:13:099:4011:30
11:18
-3:27

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

📈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

8:18 /mi

Average Pace

9:40 /mi

Slowest Pace

14:45 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

2:46:20

66% of race

Time at Steady Pace

33:53

13% of race

Time at Slower Pace

52:56

21% of race

Average Pace: 9:39 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:51:4527:559:0027:55
9:00
#22599
10K
6.21 mi12:17:3153:418:3925:46
8:18
#20988
15K
9.32 mi12:44:011:20:118:3726:30
8:32
#20738
20K
12.43 mi13:11:431:47:538:4127:42
8:55
#20955
HALF
13.11 mi13:17:481:53:588:426:05
8:56
#21018
25K
15.53 mi13:40:002:16:108:4622:12
9:10
#21169
30K
18.64 mi14:10:102:46:208:5630:10
9:43
#21409
20M
20.00 mi14:24:383:00:489:0314:28
10:40
#21744
21M
21.00 mi14:36:053:12:159:1011:27
11:27
#21922
35K
21.75 mi14:44:003:20:109:137:55
10:35
#22079
23M
23.00 mi14:58:353:34:459:2114:35
11:40
#22430
24M
24.00 mi15:10:193:46:299:2711:44
11:44
#22701
40K
24.85 mi15:20:243:56:349:3210:05
11:48
#22839
25.2M
25.20 mi15:25:294:01:399:365:05
14:45
#22977
FINISH
26.22 mi15:36:594:13:099:4011:30
11:18
#23132
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi22599135301353020319(Top 70%)12476(Top 76%)12476(Top 668%)
10K6.21 mi3.10 mi20988+161112754+77612754+77619133(Top 66%)11958(Top 73%)11958(Top 640%)
15K9.32 mi3.11 mi20738+25012644+11012644+11020319(Top 70%)12476(Top 76%)12476(Top 668%)
20K12.43 mi3.11 mi20955-21712742-9812742-9821545(Top 74%)13028(Top 80%)13028(Top 697%)
HALF13.11 mi0.68 mi21018-6312771-2912771-2922384(Top 77%)13451(Top 82%)13451(Top 720%)
25K15.53 mi2.42 mi21169-15112826-5512826-5521832(Top 75%)13155(Top 81%)13155(Top 704%)
30K18.64 mi3.11 mi21409-24012937-11112937-11122299(Top 77%)13295(Top 81%)13295(Top 712%)
20M20.00 mi1.36 mi21744-33513081-14413081-14424167(Top 83%)14076(Top 86%)14076(Top 754%)
21M21.00 mi1.00 mi21922-17813158-7713158-7724064(Top 83%)13961(Top 85%)13961(Top 747%)
35K21.75 mi0.75 mi22079-15713228-7013228-7024436(Top 84%)14125(Top 86%)14125(Top 756%)
23M23.00 mi1.25 mi22430-35113374-14613374-14625647(Top 88%)14661(Top 90%)14661(Top 785%)
24M24.00 mi1.00 mi22701-27113477-10313477-10326239(Top 90%)14900(Top 91%)14900(Top 798%)
40K24.85 mi0.85 mi22839-13813543-6613543-6625562(Top 88%)14542(Top 89%)14542(Top 778%)
25.2M25.20 mi0.35 mi22977-13813611-6813611-6827767(Top 96%)15651(Top 96%)15651(Top 838%)
FINISH26.22 mi1.02 mi23132-15513682-7113682-7126567(Top 92%)15046(Top 92%)15046(Top 805%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21
+97ft-345ft

Overall

20319

Males

12476

M50-54

12476

5K→10K

3.1 - 6.2 mi

Top 66%
×5
+79ft-138ft

Overall

19133

Males

11958

M50-54

11958

10K→15K

6.2 - 9.3 mi

Top 70%
×3
+67ft-78ft

Overall

20319

Males

12476

M50-54

12476

15K→20K

9.3 - 12.4 mi

Top 74%
×5
+106ft-86ft

Overall

21545

Males

13028

M50-54

13028

20K→HALF

12.4 - 13.1 mi

Top 77%
×2
+19ft-37ft

Overall

22384

Males

13451

M50-54

13451

HALF→25K

13.1 - 15.5 mi

Top 75%
×4
+66ft-88ft

Overall

21832

Males

13155

M50-54

13155

25K→30K

15.5 - 18.6 mi

Top 77%
×9
+181ft-148ft

Overall

22299

Males

13295

M50-54

13295

30K→20M

18.6 - 20.0 mi

Top 83%
×5
+64ft-50ft

Overall

24167

Males

14076

M50-54

14076

20M→21M

20.0 - 21.0 mi

Top 83%
×8
+106ft-24ft

Overall

24064

Males

13961

M50-54

13961

21M→35K

21.0 - 21.8 mi

Top 84%
×7
+17ft-86ft

Overall

24436

Males

14125

M50-54

14125

35K→23M

21.8 - 23.0 mi

Top 88%
×5
+23ft-63ft

Overall

25647

Males

14661

M50-54

14661

23M→24M

23.0 - 24.0 mi

Top 90%
×6
+12ft-82ft

Overall

26239

Males

14900

M50-54

14900

24M→40K

24.0 - 24.9 mi

Top 88%
×1
+6ft-20ft

Overall

25562

Males

14542

M50-54

14542

40K→25.2M

24.9 - 25.2 mi

Top 96%
×1
+13ft-16ft

Overall

27767

Males

15651

M50-54

15651

25.2M→FINISH

25.2 - 26.2 mi

Top 92%
×2
+22ft-21ft

Overall

26567

Males

15046

M50-54

15046

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
2401*
Passed By
2218
Net Change
-533
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22599
5K → 10K1623*12+1611#22599#20988
10K → 15K344*94+250#20988#20738
15K → 20K110200-217#20738#20955
20K → HALF1376-63#20955#21018
HALF → 25K76200-151#21018#21169
25K → 30K92200-240#21169#21409
30K → 20M35200-335#21409#21744
20M → 21M34200-178#21744#21922
21M → 35K17174-157#21922#22079
35K → 23M19200-351#22079#22430
23M → 24M7200-271#22430#22701
24M → 40K23161-138#22701#22839
40K → 25.2M2140-138#22839#22977
25.2M → FINISH6161-155#22977#23132
TOTALS2401*2218-533

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

📈Position Graph

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🎨Heatmap Timeline

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Activity Data

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing