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BOSTON MARATHON 2025

Simon Blouin

Bib: 13514•M

QC

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M50-54)
#0 / 1996
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
7:29/mi
23:15
↑ 97↓ 3451.5%
10K· 6.21 mi
7:28/mi
46:27
↑ 79↓ 1380.4%
15K· 9.32 mi
7:23/mi
1:09:23
↑ 67↓ 78
20K· 12.43 mi
7:29/mi
1:32:37
↑ 106↓ 860.1%
Half· 13.11 mi
7:21/mi
1:37:38
↑ 19↓ 370.5%
25K· 15.53 mi
7:52/mi
1:56:42
↑ 66↓ 880.2%
30K· 18.64 mi
8:57/mi
2:24:31
↑ 181↓ 1480.2%
20M
8:30/mi
2:36:04
↑ 64↓ 500.2%
21M
9:46/mi
2:45:50
↑ 106↓ 241.6%
35K· 21.75 mi
8:09/mi
2:51:56
↑ 17↓ 861.7%
23M
8:22/mi
3:02:24
↑ 23↓ 630.6%
24M
10:21/mi
3:12:45
↓ 821.3%
40K· 24.85 mi
9:55/mi
3:21:14
↓ 200.3%
25.2M
9:52/mi
3:24:38
↑ 13↓ 160.2%
Finish· 26.22 mi
9:08/mi
3:33:56
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:37:38
Pace7:27 /mi
2nd Half
Distance13.11 mi
Time1:56:18
Pace8:52 /mi
📊Positive Split: 19.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:1223:157:2923:15
7:29
-
10K
6.21 mi11:15:2446:277:2923:12
7:28
-0:01
15K
9.32 mi11:38:201:09:237:2722:56
7:23
-0:05
20K
12.43 mi12:01:341:32:377:2723:14
7:29
+0:06
Half
13.11 mi12:06:351:37:387:275:01
7:21
-0:08
25K
15.53 mi12:25:391:56:427:3119:04
7:52
+0:31
30K
18.64 mi12:53:282:24:317:4527:49
8:57
+1:05
20M
20.00 mi13:05:012:36:047:4811:33
8:30
-0:27
21M
21.00 mi13:14:472:45:507:549:46
9:46
+1:16
35K
21.75 mi13:20:532:51:567:546:06
8:09
-1:37
23M
23.00 mi13:31:213:02:247:5610:28
8:22
+0:13
24M
24.00 mi13:41:423:12:458:0210:21
10:21
+1:59
40K
24.85 mi13:50:113:21:148:068:29
9:55
-0:26
25.2M
25.20 mi13:53:353:24:388:073:24
9:52
-0:03
Finish
26.22 mi14:02:533:33:568:109:18
9:08
-0:44

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

7:21 /mi

Average Pace

8:10 /mi

Slowest Pace

10:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:37:38

46% of race

Time at Steady Pace

47:11

22% of race

Time at Slower Pace

1:09:07

32% of race

Average Pace: 8:10 /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 mi10:52:1223:157:2923:15
7:29
#12068
10K
6.21 mi11:15:2446:277:2923:12
7:28
#11903
15K
9.32 mi11:38:201:09:237:2722:56
7:23
#11477
20K
12.43 mi12:01:341:32:377:2723:14
7:29
#11247
Half
13.11 mi12:06:351:37:387:275:01
7:21
#11201
25K
15.53 mi12:25:391:56:427:3119:04
7:52
#11441
30K
18.64 mi12:53:282:24:317:4527:49
8:57
#12672
20M
20.00 mi13:05:012:36:047:4811:33
8:30
#12752
21M
21.00 mi13:14:472:45:507:549:46
9:46
#13062
35K
21.75 mi13:20:532:51:567:546:06
8:09
#13060
23M
23.00 mi13:31:213:02:247:5610:28
8:22
#13003
24M
24.00 mi13:41:423:12:458:0210:21
10:21
#13642
40K
24.85 mi13:50:113:21:148:068:29
9:55
#14016
25.2M
25.20 mi13:53:353:24:388:073:24
9:52
#14052
Finish
26.22 mi14:02:533:33:568:109:18
9:08
#14270
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi120689197919710668(Top 38%)8429(Top 52%)8429(Top 422%)
10K6.21 mi3.10 mi11903+1659110+879110+8711760(Top 41%)9025(Top 56%)9025(Top 452%)
15K9.32 mi3.11 mi11477+4268874+2368874+23610668(Top 38%)8429(Top 52%)8429(Top 422%)
20K12.43 mi3.11 mi11247+2308738+1368738+13610545(Top 37%)8277(Top 51%)8277(Top 415%)
Half13.11 mi0.68 mi11201+468714+248714+2410380(Top 37%)8195(Top 51%)8195(Top 411%)
25K15.53 mi2.42 mi11441-2408792-788792-7812840(Top 45%)9213(Top 57%)9213(Top 462%)
30K18.64 mi3.11 mi12672-12319274-4829274-48217424(Top 61%)11114(Top 69%)11114(Top 557%)
20M20.00 mi1.36 mi12752-809273+19273+113740(Top 48%)9314(Top 58%)9314(Top 467%)
21M21.00 mi1.00 mi13062-3109386-1139386-11317298(Top 61%)10814(Top 67%)10814(Top 542%)
35K21.75 mi0.75 mi13060+29366+209366+2013225(Top 47%)8885(Top 55%)8885(Top 445%)
23M23.00 mi1.25 mi13003+579298+689298+6812370(Top 44%)8389(Top 52%)8389(Top 420%)
24M24.00 mi1.00 mi13642-6399547-2499547-24922374(Top 79%)12984(Top 81%)12984(Top 651%)
40K24.85 mi0.85 mi14016-3749690-1439690-14320160(Top 71%)11862(Top 74%)11862(Top 594%)
25.2M25.20 mi0.35 mi14052-369694-49694-416260(Top 57%)9974(Top 62%)9974(Top 500%)
Finish26.22 mi1.02 mi14270-2189764-709764-7019588(Top 69%)11613(Top 72%)11613(Top 582%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 38%
×21story building
+97ft-345ft

Overall

10668

Males

8429

M50-54

8429

5K→10K

3.1 - 6.2 mi

Top 41%
×5story building
+79ft-138ft

Overall

11760

Males

9025

M50-54

9025

10K→15K

6.2 - 9.3 mi

Top 38%
×3story building
+67ft-78ft

Overall

10668

Males

8429

M50-54

8429

15K→20K

9.3 - 12.4 mi

Top 37%
×5story building
+106ft-86ft

Overall

10545

Males

8277

M50-54

8277

20K→Half

12.4 - 13.1 mi

Top 37%
×2story building
+19ft-37ft

Overall

10380

Males

8195

M50-54

8195

Half→25K

13.1 - 15.5 mi

Top 45%
×4story building
+66ft-88ft

Overall

12840

Males

9213

M50-54

9213

25K→30K

15.5 - 18.6 mi

Top 61%
×9story building
+181ft-148ft

Overall

17424

Males

11114

M50-54

11114

30K→20M

18.6 - 20.0 mi

Top 48%
×5story building
+64ft-50ft

Overall

13740

Males

9314

M50-54

9314

20M→21M

20.0 - 21.0 mi

Top 61%
×8story building
+106ft-24ft

Overall

17298

Males

10814

M50-54

10814

21M→35K

21.0 - 21.8 mi

Top 47%
×7story building
+17ft-86ft

Overall

13225

Males

8885

M50-54

8885

35K→23M

21.8 - 23.0 mi

Top 44%
×5story building
+23ft-63ft

Overall

12370

Males

8389

M50-54

8389

23M→24M

23.0 - 24.0 mi

Top 79%
×6story building
+12ft-82ft

Overall

22374

Males

12984

M50-54

12984

24M→40K

24.0 - 24.9 mi

Top 71%
×1story
+6ft-20ft

Overall

20160

Males

11862

M50-54

11862

40K→25.2M

24.9 - 25.2 mi

Top 57%
×1story
+13ft-16ft

Overall

16260

Males

9974

M50-54

9974

25.2M→Finish

25.2 - 26.2 mi

Top 69%
×2story building
+22ft-21ft

Overall

19588

Males

11613

M50-54

11613

Passing Analysis

Category:
Athletes Passed
1734
Passed By
3936
Net Change
-2202
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12068
5K → 10K347182+165#12068#11903
10K → 15K45832+426#11903#11477
15K → 20K29969+230#11477#11247
20K → Half6115+46#11247#11201
Half → 25K101341-240#11201#11441
25K → 30K551286-1231#11441#12672
30K → 20M93173-80#12672#12752
20M → 21M48358-310#12752#13062
21M → 35K5048+2#13062#13060
35K → 23M13780+57#13060#13003
23M → 24M9648-639#13003#13642
24M → 40K23397-374#13642#14016
40K → 25.2M2460-36#14016#14052
25.2M → Finish29247-218#14052#14270
TOTALS17343936-2202
📊

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