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BOSTON MARATHON 2025

Guillaume Lefebvre

Bib: 6208•M

QC

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 16%
Gender (Male)
#0 / 16105
Top 26%
Masters (Masters Men)
#0 / 10463
Top 12%
Division (M50-54)
#0 / 1996
Top 7%
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
6:45/mi
20:57
↑ 97↓ 3451.5%
10K· 6.21 mi
6:45/mi
41:54
↑ 79↓ 1380.4%
15K· 9.32 mi
6:43/mi
1:02:47
↑ 67↓ 78
20K· 12.43 mi
6:44/mi
1:23:41
↑ 106↓ 860.1%
Half· 13.11 mi
6:40/mi
1:28:14
↑ 19↓ 370.5%
25K· 15.53 mi
6:41/mi
1:44:26
↑ 66↓ 880.2%
30K· 18.64 mi
6:48/mi
2:05:34
↑ 181↓ 1480.2%
20M
6:51/mi
2:14:53
↑ 64↓ 500.2%
21M
7:11/mi
2:22:04
↑ 106↓ 241.6%
35K· 21.75 mi
6:53/mi
2:27:13
↑ 17↓ 861.7%
23M
7:09/mi
2:36:10
↑ 23↓ 630.6%
24M
7:25/mi
2:43:35
↓ 821.3%
40K· 24.85 mi
7:16/mi
2:49:48
↓ 200.3%
25.2M
8:04/mi
2:52:35
↑ 13↓ 160.2%
Finish· 26.22 mi
6:58/mi
2:59:41
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:28:14
Pace6:44 /mi
2nd Half
Distance13.11 mi
Time1:31:27
Pace6:59 /mi
📊Positive Split: 3.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:29:5720:576:4520:57
6:45
-
10K
6.21 mi10:50:5441:546:4520:57
6:45
0:00
15K
9.32 mi11:11:471:02:476:4420:53
6:43
-0:02
20K
12.43 mi11:32:411:23:416:4420:54
6:44
+0:01
Half
13.11 mi11:37:141:28:146:444:33
6:40
-0:04
25K
15.53 mi11:53:261:44:266:4316:12
6:41
+0:01
30K
18.64 mi12:14:342:05:346:4421:08
6:48
+0:07
20M
20.00 mi12:23:532:14:536:459:19
6:51
+0:03
21M
21.00 mi12:31:042:22:046:467:11
7:11
+0:20
35K
21.75 mi12:36:132:27:136:465:09
6:53
-0:18
23M
23.00 mi12:45:102:36:106:478:57
7:09
+0:16
24M
24.00 mi12:52:352:43:356:497:25
7:25
+0:16
40K
24.85 mi12:58:482:49:486:506:13
7:16
-0:09
25.2M
25.20 mi13:01:352:52:356:512:47
8:04
+0:48
Finish
26.22 mi13:08:412:59:416:517:06
6:58
-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

6:40 /mi

Average Pace

6:51 /mi

Slowest Pace

8:04 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

4:33

3% of race

Time at Steady Pace

2:22:35

79% of race

Time at Slower Pace

32:33

18% of race

Average Pace: 6:51 /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 mi10:29:5720:576:4520:57
6:45
#5834
10K
6.21 mi10:50:5441:546:4520:57
6:45
#5774
15K
9.32 mi11:11:471:02:476:4420:53
6:43
#5586
20K
12.43 mi11:32:411:23:416:4420:54
6:44
#5312
Half
13.11 mi11:37:141:28:146:444:33
6:40
#5284
25K
15.53 mi11:53:261:44:266:4316:12
6:41
#5006
30K
18.64 mi12:14:342:05:346:4421:08
6:48
#4616
20M
20.00 mi12:23:532:14:536:459:19
6:51
#4463
21M
21.00 mi12:31:042:22:046:467:11
7:11
#4317
35K
21.75 mi12:36:132:27:136:465:09
6:53
#4319
23M
23.00 mi12:45:102:36:106:478:57
7:09
#4305
24M
24.00 mi12:52:352:43:356:497:25
7:25
#4439
40K
24.85 mi12:58:482:49:486:506:13
7:16
#4477
25.2M
25.20 mi13:01:352:52:356:512:47
8:04
#4520
Finish
26.22 mi13:08:412:59:416:517:06
6:58
#4595
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi5834537953795294(Top 19%)4893(Top 30%)4893(Top 245%)
10K6.21 mi3.10 mi5774+605325+545325+545771(Top 20%)5287(Top 33%)5287(Top 265%)
15K9.32 mi3.11 mi5586+1885152+1735152+1735294(Top 19%)4893(Top 30%)4893(Top 245%)
20K12.43 mi3.11 mi5312+2744917+2354917+2354685(Top 16%)4347(Top 27%)4347(Top 218%)
Half13.11 mi0.68 mi5284+284891+264891+265041(Top 18%)4670(Top 29%)4670(Top 234%)
25K15.53 mi2.42 mi5006+2784645+2464645+2464009(Top 14%)3741(Top 23%)3741(Top 187%)
30K18.64 mi3.11 mi4616+3904294+3514294+3513470(Top 12%)3228(Top 20%)3228(Top 162%)
20M20.00 mi1.36 mi4463+1534154+1404154+1403270(Top 12%)3026(Top 19%)3026(Top 152%)
21M21.00 mi1.00 mi4317+1464017+1374017+1373085(Top 11%)2850(Top 18%)2850(Top 143%)
35K21.75 mi0.75 mi4319-24012+54012+54640(Top 16%)4118(Top 26%)4118(Top 206%)
23M23.00 mi1.25 mi4305+143995+173995+174603(Top 16%)4035(Top 25%)4035(Top 202%)
24M24.00 mi1.00 mi4439-1344095-1004095-1007115(Top 25%)5590(Top 35%)5590(Top 280%)
40K24.85 mi0.85 mi4477-384121-264121-265489(Top 19%)4549(Top 28%)4549(Top 228%)
25.2M25.20 mi0.35 mi4520-434150-294150-296275(Top 22%)4908(Top 30%)4908(Top 246%)
Finish26.22 mi1.02 mi4595-754213-634213-635507(Top 19%)4431(Top 28%)4431(Top 222%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 19%
×21story building
+97ft-345ft

Overall

5294

Males

4893

M50-54

4893

5K→10K

3.1 - 6.2 mi

Top 20%
×5story building
+79ft-138ft

Overall

5771

Males

5287

M50-54

5287

10K→15K

6.2 - 9.3 mi

Top 19%
×3story building
+67ft-78ft

Overall

5294

Males

4893

M50-54

4893

15K→20K

9.3 - 12.4 mi

Top 16%
×5story building
+106ft-86ft

Overall

4685

Males

4347

M50-54

4347

20K→Half

12.4 - 13.1 mi

Top 18%
×2story building
+19ft-37ft

Overall

5041

Males

4670

M50-54

4670

Half→25K

13.1 - 15.5 mi

Top 14%
×4story building
+66ft-88ft

Overall

4009

Males

3741

M50-54

3741

25K→30K

15.5 - 18.6 mi

Top 12%
×9story building
+181ft-148ft

Overall

3470

Males

3228

M50-54

3228

30K→20M

18.6 - 20.0 mi

Top 12%
×5story building
+64ft-50ft

Overall

3270

Males

3026

M50-54

3026

20M→21M

20.0 - 21.0 mi

Top 11%
×8story building
+106ft-24ft

Overall

3085

Males

2850

M50-54

2850

21M→35K

21.0 - 21.8 mi

Top 16%
×7story building
+17ft-86ft

Overall

4640

Males

4118

M50-54

4118

35K→23M

21.8 - 23.0 mi

Top 16%
×5story building
+23ft-63ft

Overall

4603

Males

4035

M50-54

4035

23M→24M

23.0 - 24.0 mi

Top 25%
×6story building
+12ft-82ft

Overall

7115

Males

5590

M50-54

5590

24M→40K

24.0 - 24.9 mi

Top 19%
×1story
+6ft-20ft

Overall

5489

Males

4549

M50-54

4549

40K→25.2M

24.9 - 25.2 mi

Top 22%
×1story
+13ft-16ft

Overall

6275

Males

4908

M50-54

4908

25.2M→Finish

25.2 - 26.2 mi

Top 19%
×2story building
+22ft-21ft

Overall

5507

Males

4431

M50-54

4431

Passing Analysis

Category:
Athletes Passed
2013
Passed By
774
Net Change
+1239
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5834
5K → 10K207147+60#5834#5774
10K → 15K23042+188#5774#5586
15K → 20K29117+274#5586#5312
20K → Half3911+28#5312#5284
Half → 25K29113+278#5284#5006
25K → 30K40919+390#5006#4616
30K → 20M16512+153#4616#4463
20M → 21M15812+146#4463#4317
21M → 35K4345-2#4317#4319
35K → 23M7561+14#4319#4305
23M → 24M28162-134#4305#4439
24M → 40K3977-38#4439#4477
40K → 25.2M1255-43#4477#4520
25.2M → Finish26101-75#4520#4595
TOTALS2013774+1239
📊

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