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BOSTON MARATHON 2025

Alexander Lammers

Bib: 5047•M

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 7%
Gender (Male)
#0 / 16105
Top 12%
Division (M18-39)
#0 / 5642
Top 28%
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
6:20/mi
19:42
↑ 97↓ 3451.5%
10K· 6.21 mi
6:23/mi
39:31
↑ 79↓ 1380.4%
15K· 9.32 mi
6:19/mi
59:08
↑ 67↓ 78
20K· 12.43 mi
6:27/mi
1:19:10
↑ 106↓ 860.1%
Half· 13.11 mi
6:17/mi
1:23:27
↑ 19↓ 370.5%
25K· 15.53 mi
6:18/mi
1:38:43
↑ 66↓ 880.2%
30K· 18.64 mi
6:26/mi
1:58:42
↑ 181↓ 1480.2%
20M
6:27/mi
2:07:28
↑ 64↓ 500.2%
21M
6:42/mi
2:14:10
↑ 106↓ 241.6%
35K· 21.75 mi
6:16/mi
2:18:51
↑ 17↓ 861.7%
23M
6:39/mi
2:27:10
↑ 23↓ 630.6%
24M
6:35/mi
2:33:45
↓ 821.3%
40K· 24.85 mi
6:51/mi
2:39:36
↓ 200.3%
25.2M
7:27/mi
2:42:10
↑ 13↓ 160.2%
Finish· 26.22 mi
6:34/mi
2:48:51
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:23:27
Pace6:22 /mi
2nd Half
Distance13.11 mi
Time1:25:24
Pace6:31 /mi
📊Positive Split: 2.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:2019:426:2019:42
6:20
-
10K
6.21 mi10:43:0939:316:2219:49
6:23
+0:03
15K
9.32 mi11:02:4659:086:2119:37
6:19
-0:04
20K
12.43 mi11:22:481:19:106:2220:02
6:27
+0:08
Half
13.11 mi11:27:051:23:276:224:17
6:17
-0:10
25K
15.53 mi11:42:211:38:436:2115:16
6:18
+0:01
30K
18.64 mi12:02:201:58:426:2219:59
6:26
+0:08
20M
20.00 mi12:11:062:07:286:228:46
6:27
+0:01
21M
21.00 mi12:17:482:14:106:236:42
6:42
+0:15
35K
21.75 mi12:22:292:18:516:234:41
6:16
-0:26
23M
23.00 mi12:30:482:27:106:248:19
6:39
+0:23
24M
24.00 mi12:37:232:33:456:246:35
6:35
-0:04
40K
24.85 mi12:43:142:39:366:255:51
6:51
+0:16
25.2M
25.20 mi12:45:482:42:106:262:34
7:27
+0:36
Finish
26.22 mi12:52:292:48:516:276:41
6:34
-0:53

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

6:16 /mi

Average Pace

6:27 /mi

Slowest Pace

7:27 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:46:17

98% of race

Time at Steady Pace

0:00

0% of race

Time at Slower Pace

2:34

2% of race

Average Pace: 6:26 /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 mi10:23:2019:426:2019:42
6:20
#2683
10K
6.21 mi10:43:0939:316:2219:49
6:23
#2784
15K
9.32 mi11:02:4659:086:2119:37
6:19
#2660
20K
12.43 mi11:22:481:19:106:2220:02
6:27
#2670
Half
13.11 mi11:27:051:23:276:224:17
6:17
#2646
25K
15.53 mi11:42:211:38:436:2115:16
6:18
#2477
30K
18.64 mi12:02:201:58:426:2219:59
6:26
#2273
20M
20.00 mi12:11:062:07:286:228:46
6:27
#2188
21M
21.00 mi12:17:482:14:106:236:42
6:42
#2105
35K
21.75 mi12:22:292:18:516:234:41
6:16
#2061
23M
23.00 mi12:30:482:27:106:248:19
6:39
#2015
24M
24.00 mi12:37:232:33:456:246:35
6:35
#1992
40K
24.85 mi12:43:142:39:366:255:51
6:51
#2009
25.2M
25.20 mi12:45:482:42:106:262:34
7:27
#2012
Finish
26.22 mi12:52:292:48:516:276:41
6:34
#2044
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2683255725572401(Top 8%)2291(Top 14%)2291(Top 41%)
10K6.21 mi3.10 mi2784-1012651-942651-942885(Top 10%)2746(Top 17%)2746(Top 49%)
15K9.32 mi3.11 mi2660+1242536+1152536+1152401(Top 8%)2291(Top 14%)2291(Top 41%)
20K12.43 mi3.11 mi2670-102545-92545-92798(Top 10%)2663(Top 17%)2663(Top 47%)
Half13.11 mi0.68 mi2646+242524+212524+212351(Top 8%)2248(Top 14%)2248(Top 40%)
25K15.53 mi2.42 mi2477+1692364+1602364+1601835(Top 6%)1743(Top 11%)1743(Top 31%)
30K18.64 mi3.11 mi2273+2042168+1962168+1961681(Top 6%)1594(Top 10%)1594(Top 28%)
20M20.00 mi1.36 mi2188+852086+822086+821438(Top 5%)1360(Top 8%)1360(Top 24%)
21M21.00 mi1.00 mi2105+832004+822004+821204(Top 4%)1138(Top 7%)1138(Top 20%)
35K21.75 mi0.75 mi2061+441960+441960+441458(Top 5%)1382(Top 9%)1382(Top 24%)
23M23.00 mi1.25 mi2015+461915+451915+451988(Top 7%)1858(Top 12%)1858(Top 33%)
24M24.00 mi1.00 mi1992+231891+241891+242392(Top 8%)2208(Top 14%)2208(Top 39%)
40K24.85 mi0.85 mi2009-171906-151906-153011(Top 11%)2707(Top 17%)2707(Top 48%)
25.2M25.20 mi0.35 mi2012-31908-21908-23077(Top 11%)2718(Top 17%)2718(Top 48%)
Finish26.22 mi1.02 mi2044-321939-311939-313062(Top 11%)2717(Top 17%)2717(Top 48%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 8%
×21story building
+97ft-345ft

Overall

2401

Males

2291

M18-39

2291

5K→10K

3.1 - 6.2 mi

Top 10%
×5story building
+79ft-138ft

Overall

2885

Males

2746

M18-39

2746

10K→15K

6.2 - 9.3 mi

Top 8%
×3story building
+67ft-78ft

Overall

2401

Males

2291

M18-39

2291

15K→20K

9.3 - 12.4 mi

Top 10%
×5story building
+106ft-86ft

Overall

2798

Males

2663

M18-39

2663

20K→Half

12.4 - 13.1 mi

Top 8%
×2story building
+19ft-37ft

Overall

2351

Males

2248

M18-39

2248

Half→25K

13.1 - 15.5 mi

Top 6%
×4story building
+66ft-88ft

Overall

1835

Males

1743

M18-39

1743

25K→30K

15.5 - 18.6 mi

Top 6%
×9story building
+181ft-148ft

Overall

1681

Males

1594

M18-39

1594

30K→20M

18.6 - 20.0 mi

Top 5%
×5story building
+64ft-50ft

Overall

1438

Males

1360

M18-39

1360

20M→21M

20.0 - 21.0 mi

Top 4%
×8story building
+106ft-24ft

Overall

1204

Males

1138

M18-39

1138

21M→35K

21.0 - 21.8 mi

Top 5%
×7story building
+17ft-86ft

Overall

1458

Males

1382

M18-39

1382

35K→23M

21.8 - 23.0 mi

Top 7%
×5story building
+23ft-63ft

Overall

1988

Males

1858

M18-39

1858

23M→24M

23.0 - 24.0 mi

Top 8%
×6story building
+12ft-82ft

Overall

2392

Males

2208

M18-39

2208

24M→40K

24.0 - 24.9 mi

Top 11%
×1story
+6ft-20ft

Overall

3011

Males

2707

M18-39

2707

40K→25.2M

24.9 - 25.2 mi

Top 11%
×1story
+13ft-16ft

Overall

3077

Males

2718

M18-39

2718

25.2M→Finish

25.2 - 26.2 mi

Top 11%
×2story building
+22ft-21ft

Overall

3062

Males

2717

M18-39

2717

Passing Analysis

Category:
Athletes Passed
1106
Passed By
467
Net Change
+639
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2683
5K → 10K81182-101#2683#2784
10K → 15K14824+124#2784#2660
15K → 20K6474-10#2660#2670
20K → Half295+24#2670#2646
Half → 25K1745+169#2646#2477
25K → 30K21410+204#2477#2273
30K → 20M894+85#2273#2188
20M → 21M896+83#2188#2105
21M → 35K506+44#2105#2061
35K → 23M7125+46#2061#2015
23M → 24M4421+23#2015#1992
24M → 40K2340-17#1992#2009
40K → 25.2M1013-3#2009#2012
25.2M → Finish2052-32#2012#2044
TOTALS1106467+639
📊

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