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BOSTON MARATHON 2025

Nicholas Lam

Bib: 32338•M

CA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 34%
Gender (Male)
#0 / 16105
Top 47%
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
8:02/mi
24:58
↑ 97↓ 3451.5%
10K· 6.21 mi
7:47/mi
49:10
↑ 79↓ 1380.4%
15K· 9.32 mi
7:31/mi
1:12:30
↑ 67↓ 78
20K· 12.43 mi
7:32/mi
1:35:54
↑ 106↓ 860.1%
Half· 13.11 mi
7:23/mi
1:40:56
↑ 19↓ 370.5%
25K· 15.53 mi
7:35/mi
1:59:19
↑ 66↓ 880.2%
30K· 18.64 mi
7:34/mi
2:22:50
↑ 181↓ 1480.2%
20M
7:35/mi
2:33:08
↑ 64↓ 500.2%
21M
7:51/mi
2:40:59
↑ 106↓ 241.6%
35K· 21.75 mi
7:12/mi
2:46:22
↑ 17↓ 861.7%
23M
7:13/mi
2:55:24
↑ 23↓ 630.6%
24M
7:08/mi
3:02:32
↓ 821.3%
40K· 24.85 mi
7:09/mi
3:08:39
↓ 200.3%
25.2M
7:56/mi
3:11:23
↑ 13↓ 160.2%
Finish· 26.22 mi
6:50/mi
3:18:21
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:40:56
Pace7:42 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:37:25
Pace7:26 /mi
📊Negative Split: 3.5% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:1624:588:0224:58
8:02
-
10K
6.21 mi12:13:2849:107:5524:12
7:47
-0:15
15K
9.32 mi12:36:481:12:307:4723:20
7:31
-0:16
20K
12.43 mi13:00:121:35:547:4323:24
7:32
+0:01
Half
13.11 mi13:05:141:40:567:425:02
7:23
-0:09
25K
15.53 mi13:23:371:59:197:4118:23
7:35
+0:12
30K
18.64 mi13:47:082:22:507:4023:31
7:34
-0:01
20M
20.00 mi13:57:262:33:087:3910:18
7:35
+0:01
21M
21.00 mi14:05:172:40:597:407:51
7:51
+0:16
35K
21.75 mi14:10:402:46:227:395:23
7:12
-0:39
23M
23.00 mi14:19:422:55:247:389:02
7:13
+0:01
24M
24.00 mi14:26:503:02:327:367:08
7:08
-0:05
40K
24.85 mi14:32:573:08:397:356:07
7:09
+0:01
25.2M
25.20 mi14:35:413:11:237:362:44
7:56
+0:47
Finish
26.22 mi14:42:393:18:217:346:58
6:50
-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

6:50 /mi

Average Pace

7:34 /mi

Slowest Pace

8:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:03:00

32% of race

Time at Steady Pace

2:15:21

68% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:34 /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 mi11:49:1624:588:0224:58
8:02
#16853
10K
6.21 mi12:13:2849:107:5524:12
7:47
#15795
15K
9.32 mi12:36:481:12:307:4723:20
7:31
#14442
20K
12.43 mi13:00:121:35:547:4323:24
7:32
#13510
Half
13.11 mi13:05:141:40:567:425:02
7:23
#13356
25K
15.53 mi13:23:371:59:197:4118:23
7:35
#12859
30K
18.64 mi13:47:082:22:507:4023:31
7:34
#11924
20M
20.00 mi13:57:262:33:087:3910:18
7:35
#11521
21M
21.00 mi14:05:172:40:597:407:51
7:51
#11196
35K
21.75 mi14:10:402:46:227:395:23
7:12
#10982
23M
23.00 mi14:19:422:55:247:389:02
7:13
#10556
24M
24.00 mi14:26:503:02:327:367:08
7:08
#10269
40K
24.85 mi14:32:573:08:397:356:07
7:09
#9996
25.2M
25.20 mi14:35:413:11:237:362:44
7:56
#9890
Finish
26.22 mi14:42:393:18:217:346:58
6:50
#9625
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi16853111401114011823(Top 42%)8975(Top 56%)8975(Top 159%)
10K6.21 mi3.10 mi15795+105810729+41110729+41114684(Top 52%)10285(Top 64%)10285(Top 182%)
15K9.32 mi3.11 mi14442+135310173+55610173+55611823(Top 42%)8975(Top 56%)8975(Top 159%)
20K12.43 mi3.11 mi13510+9329735+4389735+43811018(Top 39%)8503(Top 53%)8503(Top 151%)
Half13.11 mi0.68 mi13356+1549672+639672+6310617(Top 37%)8339(Top 52%)8339(Top 148%)
25K15.53 mi2.42 mi12859+4979429+2439429+24310587(Top 37%)8189(Top 51%)8189(Top 145%)
30K18.64 mi3.11 mi11924+9358939+4908939+4908213(Top 29%)6715(Top 42%)6715(Top 119%)
20M20.00 mi1.36 mi11521+4038707+2328707+2327542(Top 27%)6171(Top 38%)6171(Top 109%)
21M21.00 mi1.00 mi11196+3258510+1978510+1976495(Top 23%)5390(Top 33%)5390(Top 96%)
35K21.75 mi0.75 mi10982+2148389+1218389+1216589(Top 23%)5455(Top 34%)5455(Top 97%)
23M23.00 mi1.25 mi10556+4268150+2398150+2394984(Top 18%)4310(Top 27%)4310(Top 76%)
24M24.00 mi1.00 mi10269+2877971+1797971+1795426(Top 19%)4560(Top 28%)4560(Top 81%)
40K24.85 mi0.85 mi9996+2737797+1747797+1744810(Top 17%)4088(Top 25%)4088(Top 72%)
25.2M25.20 mi0.35 mi9890+1067723+747723+745592(Top 20%)4510(Top 28%)4510(Top 80%)
Finish26.22 mi1.02 mi9625+2657544+1797544+1794731(Top 17%)3955(Top 25%)3955(Top 70%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 42%
×21story building
+97ft-345ft

Overall

11823

Males

8975

M18-39

8975

5K→10K

3.1 - 6.2 mi

Top 52%
×5story building
+79ft-138ft

Overall

14684

Males

10285

M18-39

10285

10K→15K

6.2 - 9.3 mi

Top 42%
×3story building
+67ft-78ft

Overall

11823

Males

8975

M18-39

8975

15K→20K

9.3 - 12.4 mi

Top 39%
×5story building
+106ft-86ft

Overall

11018

Males

8503

M18-39

8503

20K→Half

12.4 - 13.1 mi

Top 37%
×2story building
+19ft-37ft

Overall

10617

Males

8339

M18-39

8339

Half→25K

13.1 - 15.5 mi

Top 37%
×4story building
+66ft-88ft

Overall

10587

Males

8189

M18-39

8189

25K→30K

15.5 - 18.6 mi

Top 29%
×9story building
+181ft-148ft

Overall

8213

Males

6715

M18-39

6715

30K→20M

18.6 - 20.0 mi

Top 27%
×5story building
+64ft-50ft

Overall

7542

Males

6171

M18-39

6171

20M→21M

20.0 - 21.0 mi

Top 23%
×8story building
+106ft-24ft

Overall

6495

Males

5390

M18-39

5390

21M→35K

21.0 - 21.8 mi

Top 23%
×7story building
+17ft-86ft

Overall

6589

Males

5455

M18-39

5455

35K→23M

21.8 - 23.0 mi

Top 18%
×5story building
+23ft-63ft

Overall

4984

Males

4310

M18-39

4310

23M→24M

23.0 - 24.0 mi

Top 19%
×6story building
+12ft-82ft

Overall

5426

Males

4560

M18-39

4560

24M→40K

24.0 - 24.9 mi

Top 17%
×1story
+6ft-20ft

Overall

4810

Males

4088

M18-39

4088

40K→25.2M

24.9 - 25.2 mi

Top 20%
×1story
+13ft-16ft

Overall

5592

Males

4510

M18-39

4510

25.2M→Finish

25.2 - 26.2 mi

Top 17%
×2story building
+22ft-21ft

Overall

4731

Males

3955

M18-39

3955

Passing Analysis

Category:
Athletes Passed
7305*
Passed By
77
Net Change
+7228
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16853
5K → 10K110143+1058#16853#15795
10K → 15K13530+1353#15795#14442
15K → 20K9342+932#14442#13510
20K → Half1551+154#13510#13356
Half → 25K50811+497#13356#12859
25K → 30K9361+935#12859#11924
30K → 20M4074+403#11924#11521
20M → 21M3261+325#11521#11196
21M → 35K2173+214#11196#10982
35K → 23M4260+426#10982#10556
23M → 24M2958+287#10556#10269
24M → 40K273*0+273#10269#9996
40K → 25.2M109*3+106#9996#9890
25.2M → Finish2650+265#9890#9625
TOTALS7305*77+7228

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

📊

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