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BOSTON MARATHON 2025

Lewis Lam

Bib: 30662•M

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
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
8:25/mi
26:08
↑ 97↓ 3451.5%
10K· 6.21 mi
7:58/mi
50:52
↑ 79↓ 1380.4%
15K· 9.32 mi
8:10/mi
1:16:13
↑ 67↓ 78
20K· 12.43 mi
8:11/mi
1:41:39
↑ 106↓ 860.1%
Half· 13.11 mi
8:02/mi
1:47:08
↑ 19↓ 370.5%
25K· 15.53 mi
8:09/mi
2:06:53
↑ 66↓ 880.2%
30K· 18.64 mi
8:19/mi
2:32:44
↑ 181↓ 1480.2%
20M
8:19/mi
2:44:02
↑ 64↓ 500.2%
21M
8:44/mi
2:52:46
↑ 106↓ 241.6%
35K· 21.75 mi
8:11/mi
2:58:53
↑ 17↓ 861.7%
23M
8:28/mi
3:09:29
↑ 23↓ 630.6%
24M
7:51/mi
3:17:20
↓ 821.3%
40K· 24.85 mi
7:56/mi
3:24:07
↓ 200.3%
25.2M
8:45/mi
3:27:08
↑ 13↓ 160.2%
Finish· 26.22 mi
7:34/mi
3:34:51
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:47:08
Pace8:10 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:47:43
Pace8:13 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:45:3826:088:2526:08
8:25
-
10K
6.21 mi12:10:2250:528:1124:44
7:58
-0:27
15K
9.32 mi12:35:431:16:138:1125:21
8:10
+0:12
20K
12.43 mi13:01:091:41:398:1125:26
8:11
+0:01
Half
13.11 mi13:06:381:47:088:105:29
8:02
-0:09
25K
15.53 mi13:26:232:06:538:1019:45
8:09
+0:07
30K
18.64 mi13:52:142:32:448:1225:51
8:19
+0:10
20M
20.00 mi14:03:322:44:028:1211:18
8:19
0:00
21M
21.00 mi14:12:162:52:468:148:44
8:44
+0:25
35K
21.75 mi14:18:232:58:538:146:07
8:11
-0:33
23M
23.00 mi14:28:593:09:298:1410:36
8:28
+0:17
24M
24.00 mi14:36:503:17:208:137:51
7:51
-0:37
40K
24.85 mi14:43:373:24:078:136:47
7:56
+0:05
25.2M
25.20 mi14:46:383:27:088:133:01
8:45
+0:49
Finish
26.22 mi14:54:213:34:518:127:43
7:34
-1:11

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

7:34 /mi

Average Pace

8:12 /mi

Slowest Pace

8:45 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:46:22

77% of race

Time at Steady Pace

48:29

23% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:12 /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 mi11:45:3826:088:2526:08
8:25
#19366
10K
6.21 mi12:10:2250:528:1124:44
7:58
#17873
15K
9.32 mi12:35:431:16:138:1125:21
8:10
#17611
20K
12.43 mi13:01:091:41:398:1125:26
8:11
#17203
Half
13.11 mi13:06:381:47:088:105:29
8:02
#17141
25K
15.53 mi13:26:232:06:538:1019:45
8:09
#16761
30K
18.64 mi13:52:142:32:448:1225:51
8:19
#16169
20M
20.00 mi14:03:322:44:028:1211:18
8:19
#15870
21M
21.00 mi14:12:162:52:468:148:44
8:44
#15587
35K
21.75 mi14:18:232:58:538:146:07
8:11
#15498
23M
23.00 mi14:28:593:09:298:1410:36
8:28
#15297
24M
24.00 mi14:36:503:17:208:137:51
7:51
#15043
40K
24.85 mi14:43:373:24:078:136:47
7:56
#14824
25.2M
25.20 mi14:46:383:27:088:133:01
8:45
#14740
Finish
26.22 mi14:54:213:34:518:127:43
7:34
#14528
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi19366121851218517125(Top 60%)11265(Top 70%)11265(Top 200%)
10K6.21 mi3.10 mi17873+149311567+61811567+61816143(Top 57%)10885(Top 68%)10885(Top 193%)
15K9.32 mi3.11 mi17611+26211473+9411473+9417125(Top 60%)11265(Top 70%)11265(Top 200%)
20K12.43 mi3.11 mi17203+40811289+18411289+18416206(Top 57%)10824(Top 67%)10824(Top 192%)
Half13.11 mi0.68 mi17141+6211257+3211257+3216128(Top 57%)10801(Top 67%)10801(Top 191%)
25K15.53 mi2.42 mi16761+38011087+17011087+17014930(Top 53%)10181(Top 63%)10181(Top 180%)
30K18.64 mi3.11 mi16169+59210799+28810799+28813625(Top 48%)9431(Top 59%)9431(Top 167%)
20M20.00 mi1.36 mi15870+29910629+17010629+17012582(Top 44%)8814(Top 55%)8814(Top 156%)
21M21.00 mi1.00 mi15587+28310471+15810471+15811878(Top 42%)8326(Top 52%)8326(Top 148%)
35K21.75 mi0.75 mi15498+8910428+4310428+4313435(Top 47%)9011(Top 56%)9011(Top 160%)
23M23.00 mi1.25 mi15297+20110301+12710301+12713091(Top 46%)8742(Top 54%)8742(Top 155%)
24M24.00 mi1.00 mi15043+25410171+13010171+13010195(Top 36%)7276(Top 45%)7276(Top 129%)
40K24.85 mi0.85 mi14824+21910048+12310048+1239701(Top 34%)6911(Top 43%)6911(Top 122%)
25.2M25.20 mi0.35 mi14740+8410003+4510003+4510297(Top 36%)7121(Top 44%)7121(Top 126%)
Finish26.22 mi1.02 mi14528+2129875+1289875+1289735(Top 34%)6846(Top 43%)6846(Top 121%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 60%
×21story building
+97ft-345ft

Overall

17125

Males

11265

M18-39

11265

5K→10K

3.1 - 6.2 mi

Top 57%
×5story building
+79ft-138ft

Overall

16143

Males

10885

M18-39

10885

10K→15K

6.2 - 9.3 mi

Top 60%
×3story building
+67ft-78ft

Overall

17125

Males

11265

M18-39

11265

15K→20K

9.3 - 12.4 mi

Top 57%
×5story building
+106ft-86ft

Overall

16206

Males

10824

M18-39

10824

20K→Half

12.4 - 13.1 mi

Top 57%
×2story building
+19ft-37ft

Overall

16128

Males

10801

M18-39

10801

Half→25K

13.1 - 15.5 mi

Top 53%
×4story building
+66ft-88ft

Overall

14930

Males

10181

M18-39

10181

25K→30K

15.5 - 18.6 mi

Top 48%
×9story building
+181ft-148ft

Overall

13625

Males

9431

M18-39

9431

30K→20M

18.6 - 20.0 mi

Top 44%
×5story building
+64ft-50ft

Overall

12582

Males

8814

M18-39

8814

20M→21M

20.0 - 21.0 mi

Top 42%
×8story building
+106ft-24ft

Overall

11878

Males

8326

M18-39

8326

21M→35K

21.0 - 21.8 mi

Top 47%
×7story building
+17ft-86ft

Overall

13435

Males

9011

M18-39

9011

35K→23M

21.8 - 23.0 mi

Top 46%
×5story building
+23ft-63ft

Overall

13091

Males

8742

M18-39

8742

23M→24M

23.0 - 24.0 mi

Top 36%
×6story building
+12ft-82ft

Overall

10195

Males

7276

M18-39

7276

24M→40K

24.0 - 24.9 mi

Top 34%
×1story
+6ft-20ft

Overall

9701

Males

6911

M18-39

6911

40K→25.2M

24.9 - 25.2 mi

Top 36%
×1story
+13ft-16ft

Overall

10297

Males

7121

M18-39

7121

25.2M→Finish

25.2 - 26.2 mi

Top 34%
×2story building
+22ft-21ft

Overall

9735

Males

6846

M18-39

6846

Passing Analysis

Category:
Athletes Passed
5054
Passed By
216
Net Change
+4838
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19366
5K → 10K150512+1493#19366#17873
10K → 15K34078+262#17873#17611
15K → 20K43426+408#17611#17203
20K → Half697+62#17203#17141
Half → 25K3899+380#17141#16761
25K → 30K61119+592#16761#16169
30K → 20M3045+299#16169#15870
20M → 21M29714+283#15870#15587
21M → 35K10415+89#15587#15498
35K → 23M22019+201#15498#15297
23M → 24M2551+254#15297#15043
24M → 40K2223+219#15043#14824
40K → 25.2M895+84#14824#14740
25.2M → Finish2153+212#14740#14528
TOTALS5054216+4838
📊

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