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BOSTON MARATHON 2025

Hon Yuen Lam

Bib: 10078•F

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Division (F18-39)
#0 / 5469
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
6:31/mi
20:15
↑ 97↓ 3451.5%
10K· 6.21 mi
6:46/mi
41:17
↑ 79↓ 1380.4%
15K· 9.32 mi
6:48/mi
1:02:26
↑ 67↓ 78
20K· 12.43 mi
6:52/mi
1:23:45
↑ 106↓ 860.1%
Half· 13.11 mi
6:53/mi
1:28:27
↑ 19↓ 370.5%
25K· 15.53 mi
7:00/mi
1:45:25
↑ 66↓ 880.2%
30K· 18.64 mi
11:18/mi
2:20:30
↑ 181↓ 1480.2%
20M
14:25/mi
2:40:06
↑ 64↓ 500.2%
21M
20:14/mi
3:00:20
↑ 106↓ 241.6%
35K· 21.75 mi
11:32/mi
3:08:58
↑ 17↓ 861.7%
23M
10:16/mi
3:21:49
↑ 23↓ 630.6%
24M
8:41/mi
3:30:30
↓ 821.3%
40K· 24.85 mi
8:28/mi
3:37:44
↓ 200.3%
25.2M
9:40/mi
3:41:04
↑ 13↓ 160.2%
Finish· 26.22 mi
7:59/mi
3:49:12
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:28:27
Pace6:45 /mi
2nd Half
Distance13.11 mi
Time2:20:45
Pace10:44 /mi
📊Positive Split: 59.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:45:5620:156:3120:15
6:31
-
10K
6.21 mi11:06:5841:176:3921:02
6:46
+0:15
15K
9.32 mi11:28:071:02:266:4221:09
6:48
+0:02
20K
12.43 mi11:49:261:23:456:4421:19
6:52
+0:04
Half
13.11 mi11:54:081:28:276:454:42
6:53
+0:01
25K
15.53 mi12:11:061:45:256:4716:58
7:00
+0:07
30K
18.64 mi12:46:112:20:307:3235:05
11:18
+4:18
20M
20.00 mi13:05:472:40:068:0019:36
14:25
+3:07
21M
21.00 mi13:26:013:00:208:3520:14
20:14
+5:49
35K
21.75 mi13:34:393:08:588:418:38
11:32
-8:42
23M
23.00 mi13:47:303:21:498:4612:51
10:16
-1:16
24M
24.00 mi13:56:113:30:308:468:41
8:41
-1:35
40K
24.85 mi14:03:253:37:448:467:14
8:28
-0:13
25.2M
25.20 mi14:06:453:41:048:463:20
9:40
+1:12
Finish
26.22 mi14:14:533:49:128:458:08
7:59
-1:41

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

6:31 /mi

Average Pace

8:45 /mi

Slowest Pace

20:14 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

20:15

9% of race

Time at Steady Pace

2:05:24

55% of race

Time at Slower Pace

1:23:33

36% of race

Average Pace: 8:44 /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 mi10:45:5620:156:3120:15
6:31
#3985
10K
6.21 mi11:06:5841:176:3921:02
6:46
#4883
15K
9.32 mi11:28:071:02:266:4221:09
6:48
#5254
20K
12.43 mi11:49:261:23:456:4421:19
6:52
#5365
Half
13.11 mi11:54:081:28:276:454:42
6:53
#5464
25K
15.53 mi12:11:061:45:256:4716:58
7:00
#5596
30K
18.64 mi12:46:112:20:307:3235:05
11:18
#10932
20M
20.00 mi13:05:472:40:068:0019:36
14:25
#14370
21M
21.00 mi13:26:013:00:208:3520:14
20:14
#17941
35K
21.75 mi13:34:393:08:588:418:38
11:32
#18473
23M
23.00 mi13:47:303:21:498:4612:51
10:16
#18724
24M
24.00 mi13:56:113:30:308:468:41
8:41
#18588
40K
24.85 mi14:03:253:37:448:467:14
8:28
#18377
25.2M
25.20 mi14:06:453:41:048:463:20
9:40
#18333
Finish
26.22 mi14:14:533:49:128:458:08
7:59
#18135
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi39852182186181(Top 22%)564(Top 5%)564(Top 10%)
10K6.21 mi3.10 mi4883-898317-99317-996086(Top 21%)524(Top 4%)524(Top 10%)
15K9.32 mi3.11 mi5254-371370-53370-536181(Top 22%)564(Top 5%)564(Top 10%)
20K12.43 mi3.11 mi5365-111393-23393-235898(Top 21%)537(Top 4%)537(Top 10%)
Half13.11 mi0.68 mi5464-99414-21414-216903(Top 24%)761(Top 6%)761(Top 14%)
25K15.53 mi2.42 mi5596-132444-30444-306343(Top 22%)681(Top 6%)681(Top 12%)
30K18.64 mi3.11 mi10932-53362432-19882432-198824540(Top 86%)10152(Top 83%)10152(Top 186%)
20M20.00 mi1.36 mi14370-34384343-19114343-191127595(Top 97%)11868(Top 97%)11868(Top 217%)
21M21.00 mi1.00 mi17941-35716398-20556398-205528373(Top 100%)12216(Top 100%)12216(Top 223%)
35K21.75 mi0.75 mi18473-5326722-3246722-32425161(Top 89%)10672(Top 87%)10672(Top 195%)
23M23.00 mi1.25 mi18724-2516893-1716893-17121320(Top 75%)8710(Top 71%)8710(Top 159%)
24M24.00 mi1.00 mi18588+1366841+526841+5215678(Top 55%)5744(Top 47%)5744(Top 105%)
40K24.85 mi0.85 mi18377+2116754+876754+8713241(Top 47%)4586(Top 38%)4586(Top 84%)
25.2M25.20 mi0.35 mi18333+446746+86746+815520(Top 55%)5844(Top 48%)5844(Top 107%)
Finish26.22 mi1.02 mi18135+1986644+1026644+10212803(Top 45%)4346(Top 36%)4346(Top 79%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 22%
×21story building
+97ft-345ft

Overall

6181

Females

564

F18-39

564

5K→10K

3.1 - 6.2 mi

Top 21%
×5story building
+79ft-138ft

Overall

6086

Females

524

F18-39

524

10K→15K

6.2 - 9.3 mi

Top 22%
×3story building
+67ft-78ft

Overall

6181

Females

564

F18-39

564

15K→20K

9.3 - 12.4 mi

Top 21%
×5story building
+106ft-86ft

Overall

5898

Females

537

F18-39

537

20K→Half

12.4 - 13.1 mi

Top 24%
×2story building
+19ft-37ft

Overall

6903

Females

761

F18-39

761

Half→25K

13.1 - 15.5 mi

Top 22%
×4story building
+66ft-88ft

Overall

6343

Females

681

F18-39

681

25K→30K

15.5 - 18.6 mi

Top 86%
×9story building
+181ft-148ft

Overall

24540

Females

10152

F18-39

10152

30K→20M

18.6 - 20.0 mi

Top 97%
×5story building
+64ft-50ft

Overall

27595

Females

11868

F18-39

11868

20M→21M

20.0 - 21.0 mi

Top 100%
×8story building
+106ft-24ft

Overall

28373

Females

12216

F18-39

12216

21M→35K

21.0 - 21.8 mi

Top 89%
×7story building
+17ft-86ft

Overall

25161

Females

10672

F18-39

10672

35K→23M

21.8 - 23.0 mi

Top 75%
×5story building
+23ft-63ft

Overall

21320

Females

8710

F18-39

8710

23M→24M

23.0 - 24.0 mi

Top 55%
×6story building
+12ft-82ft

Overall

15678

Females

5744

F18-39

5744

24M→40K

24.0 - 24.9 mi

Top 47%
×1story
+6ft-20ft

Overall

13241

Females

4586

F18-39

4586

40K→25.2M

24.9 - 25.2 mi

Top 55%
×1story
+13ft-16ft

Overall

15520

Females

5844

F18-39

5844

25.2M→Finish

25.2 - 26.2 mi

Top 45%
×2story building
+22ft-21ft

Overall

12803

Females

4346

F18-39

4346

Passing Analysis

Category:
Athletes Passed
912
Passed By
15060
Net Change
-14150
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3985
5K → 10K6904-898#3985#4883
10K → 15K42413-371#4883#5254
15K → 20K88199-111#5254#5365
20K → Half10109-99#5365#5464
Half → 25K80212-132#5464#5596
25K → 30K15335-5336#5596#10932
30K → 20M23440-3438#10932#14370
20M → 21M03571-3571#14370#17941
21M → 35K9541-532#17941#18473
35K → 23M57308-251#18473#18724
23M → 24M14610+136#18724#18588
24M → 40K2176+211#18588#18377
40K → 25.2M528+44#18377#18333
25.2M → Finish2024+198#18333#18135
TOTALS91215060-14150
📊

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