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BOSTON MARATHON 2025

Pui Shan Cary Lam

Bib: 20126•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 42%
Masters (Masters Women)
#0 / 6759
Top 28%
Division (F50-54)
#0 / 1303
Top 20%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:49
Rank: #8018
Start → 5K
21:49 | 7:01/mi
10K· 6.21 mi
44:06
Rank: #8633 (-615)
5K → 10K
22:17 | 7:10/mi
15K· 9.32 mi
1:06:23
Rank: #8685 (-52)
10K → 15K
22:17 | 7:10/mi
20K· 12.43 mi
1:29:36
Rank: #9086 (-401)
15K → 20K
23:13 | 7:28/mi
Half· 13.11 mi
1:34:47
Rank: #9259 (-173)
20K → Half
5:11 | 7:36/mi
25K· 15.53 mi
1:53:41
Rank: #9731 (-472)
Half → 25K
18:54 | 7:48/mi
30K· 18.64 mi
2:19:11
Rank: #10284 (-553)
25K → 30K
25:30 | 8:12/mi
20M
2:30:44
Rank: #10576 (-292)
30K → 20M
11:33 | 8:30/mi
21M
2:39:56
Rank: #10800 (-224)
20M → 21M
9:12 | 9:12/mi
35K· 21.75 mi
2:46:54
Rank: #11189 (-389)
21M → 35K
6:58 | 9:19/mi
23M
3:05:48
Rank: #14169 (-2980)
35K → 23M
18:54 | 15:06/mi
24M
3:15:33
Rank: #14527 (-358)
23M → 24M
9:45 | 9:45/mi
40K· 24.85 mi
3:23:41
Rank: #14709 (-182)
24M → 40K
8:08 | 9:31/mi
25.2M
3:27:32
Rank: #14847 (-138)
40K → 25.2M
3:51 | 11:10/mi
Finish· 26.22 mi
3:38:09
Rank: #15410 (-563)
25.2M → Finish
10:37 | 10:25/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:34:47
Pace7:14 /mi
2nd Half
Distance13.11 mi
Time2:03:22
Pace9:25 /mi
📊Positive Split: 30.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:12:0321:497:0121:49
7:01
-
10K
6.21 mi11:34:2044:067:0622:17
7:10
+0:09
15K
9.32 mi11:56:371:06:237:0722:17
7:10
0:00
20K
12.43 mi12:19:501:29:367:1323:13
7:28
+0:18
Half
13.11 mi12:25:011:34:477:145:11
7:36
+0:08
25K
15.53 mi12:43:551:53:417:1918:54
7:48
+0:12
30K
18.64 mi13:09:252:19:117:2825:30
8:12
+0:24
20M
20.00 mi13:20:582:30:447:3211:33
8:30
+0:18
21M
21.00 mi13:30:102:39:567:379:12
9:12
+0:42
35K
21.75 mi13:37:082:46:547:406:58
9:19
+0:07
23M
23.00 mi13:56:023:05:488:0518:54
15:06
+5:47
24M
24.00 mi14:05:473:15:338:099:45
9:45
-5:21
40K
24.85 mi14:13:553:23:418:128:08
9:31
-0:14
25.2M
25.20 mi14:17:463:27:328:143:51
11:10
+1:39
Finish
26.22 mi14:28:233:38:098:2010:37
10:25
-0:45

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

7:01 /mi

Average Pace

8:20 /mi

Slowest Pace

15:06 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:29:36

41% of race

Time at Steady Pace

1:25:26

39% of race

Time at Slower Pace

43:07

20% of race

Average Pace: 8:19 /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 mi11:12:0321:497:0121:49
7:01
#8018
10K
6.21 mi11:34:2044:067:0622:17
7:10
#8633
15K
9.32 mi11:56:371:06:237:0722:17
7:10
#8685
20K
12.43 mi12:19:501:29:367:1323:13
7:28
#9086
Half
13.11 mi12:25:011:34:477:145:11
7:36
#9259
25K
15.53 mi12:43:551:53:417:1918:54
7:48
#9731
30K
18.64 mi13:09:252:19:117:2825:30
8:12
#10284
20M
20.00 mi13:20:582:30:447:3211:33
8:30
#10576
21M
21.00 mi13:30:102:39:567:379:12
9:12
#10800
35K
21.75 mi13:37:082:46:547:406:58
9:19
#11189
23M
23.00 mi13:56:023:05:488:0518:54
15:06
#14169
24M
24.00 mi14:05:473:15:338:099:45
9:45
#14527
40K
24.85 mi14:13:553:23:418:128:08
9:31
#14709
25.2M
25.20 mi14:17:463:27:328:143:51
11:10
#14847
Finish
26.22 mi14:28:233:38:098:2010:37
10:25
#15410
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi80189939938921(Top 31%)1397(Top 11%)1397(Top 107%)
10K6.21 mi3.10 mi8633-6151236-2431236-2439281(Top 33%)1506(Top 12%)1506(Top 116%)
15K9.32 mi3.11 mi8685-521266-301266-308921(Top 31%)1397(Top 11%)1397(Top 107%)
20K12.43 mi3.11 mi9086-4011455-1891455-18910543(Top 37%)2238(Top 18%)2238(Top 172%)
Half13.11 mi0.68 mi9259-1731536-811536-8112652(Top 45%)3336(Top 27%)3336(Top 256%)
25K15.53 mi2.42 mi9731-4721780-2441780-24412336(Top 43%)3303(Top 27%)3303(Top 253%)
30K18.64 mi3.11 mi10284-5532092-3122092-31212910(Top 45%)3788(Top 31%)3788(Top 291%)
20M20.00 mi1.36 mi10576-2922293-2012293-20113822(Top 49%)4430(Top 36%)4430(Top 340%)
21M21.00 mi1.00 mi10800-2242449-1562449-15614656(Top 52%)4974(Top 41%)4974(Top 382%)
35K21.75 mi0.75 mi11189-3892671-2222671-22219626(Top 69%)7774(Top 64%)7774(Top 597%)
23M23.00 mi1.25 mi14169-29804323-16524323-165227955(Top 98%)12075(Top 99%)12075(Top 927%)
24M24.00 mi1.00 mi14527-3584528-2054528-20520572(Top 72%)8373(Top 68%)8373(Top 643%)
40K24.85 mi0.85 mi14709-1824669-1414669-14118759(Top 66%)7497(Top 61%)7497(Top 575%)
25.2M25.20 mi0.35 mi14847-1384752-834752-8321127(Top 74%)8710(Top 71%)8710(Top 668%)
Finish26.22 mi1.02 mi15410-5635110-3585110-35824097(Top 85%)10217(Top 84%)10217(Top 784%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 31%
×21stories
+97ft-345ft

Overall

8921

Females

1397

F50-54

1397

5K→10K

3.1 - 6.2 mi

Top 33%
×5stories
+79ft-138ft

Overall

9281

Females

1506

F50-54

1506

10K→15K

6.2 - 9.3 mi

Top 31%
×3stories
+67ft-78ft

Overall

8921

Females

1397

F50-54

1397

15K→20K

9.3 - 12.4 mi

Top 37%
×5stories
+106ft-86ft

Overall

10543

Females

2238

F50-54

2238

20K→Half

12.4 - 13.1 mi

Top 45%
×2stories
+19ft-37ft

Overall

12652

Females

3336

F50-54

3336

Half→25K

13.1 - 15.5 mi

Top 43%
×4stories
+66ft-88ft

Overall

12336

Females

3303

F50-54

3303

25K→30K

15.5 - 18.6 mi

Top 45%
×9stories
+181ft-148ft

Overall

12910

Females

3788

F50-54

3788

30K→20M

18.6 - 20.0 mi

Top 49%
×5stories
+64ft-50ft

Overall

13822

Females

4430

F50-54

4430

20M→21M

20.0 - 21.0 mi

Top 52%
×8stories
+106ft-24ft

Overall

14656

Females

4974

F50-54

4974

21M→35K

21.0 - 21.8 mi

Top 69%
×7stories
+17ft-86ft

Overall

19626

Females

7774

F50-54

7774

35K→23M

21.8 - 23.0 mi

Top 98%
×5stories
+23ft-63ft

Overall

27955

Females

12075

F50-54

12075

23M→24M

23.0 - 24.0 mi

Top 72%
×6stories
+12ft-82ft

Overall

20572

Females

8373

F50-54

8373

24M→40K

24.0 - 24.9 mi

Top 66%
×1story
+6ft-20ft

Overall

18759

Females

7497

F50-54

7497

40K→25.2M

24.9 - 25.2 mi

Top 74%
×1story
+13ft-16ft

Overall

21127

Females

8710

F50-54

8710

25.2M→Finish

25.2 - 26.2 mi

Top 85%
×2stories
+22ft-21ft

Overall

24097

Females

10217

F50-54

10217

Passing Analysis

Category:
Athletes Passed
615
Passed By
8005
Net Change
-7392
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8018
5K → 10K48663-615#8018#8633
10K → 15K143195-52#8633#8685
15K → 20K77478-401#8685#9086
20K → Half5178-173#9086#9259
Half → 25K63535-472#9259#9731
25K → 30K101652-553#9731#10284
30K → 20M54346-292#10284#10576
20M → 21M52276-224#10576#10800
21M → 35K7396-389#10800#11189
35K → 23M32983-2980#11189#14169
23M → 24M14372-358#14169#14527
24M → 40K34216-182#14527#14709
40K → 25.2M9147-138#14709#14847
25.2M → Finish5568-563#14847#15410
TOTALS6158005-7392
📊

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