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BOSTON MARATHON 2023

Michael Brethour

Bib: 31843•M

FL

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M45-49)
#0 / 2252
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ 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
10:43/mi
33:18
↑ 97↓ 3451.5%
10K· 6.21 mi
11:50/mi
1:10:03
↑ 79↓ 1380.4%
15K· 9.32 mi
10:52/mi
1:43:50
↑ 67↓ 78
20K· 12.43 mi
11:46/mi
2:20:24
↑ 106↓ 860.1%
Half· 13.11 mi
11:38/mi
2:28:20
↑ 19↓ 370.5%
25K· 15.53 mi
12:28/mi
2:58:34
↑ 66↓ 880.2%
30K· 18.64 mi
13:09/mi
3:39:24
↑ 181↓ 1480.2%
20M
12:58/mi
3:57:01
↑ 64↓ 500.2%
21M
14:26/mi
4:11:27
↑ 106↓ 241.6%
35K· 21.75 mi
12:30/mi
4:20:48
↑ 17↓ 861.7%
23M
12:55/mi
4:36:58
↑ 23↓ 630.6%
24M
11:49/mi
4:48:47
↓ 821.3%
40K· 24.85 mi
12:16/mi
4:59:16
↓ 200.3%
25.2M
13:46/mi
5:04:01
↑ 13↓ 160.2%
Finish· 26.22 mi
11:31/mi
5:15:45
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:28:20
Pace11:19 /mi
2nd Half
Distance13.11 mi
Time2:47:25
Pace12:46 /mi
📊Positive Split: 12.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:2133:1810:4333:18
10:43
-
10K
6.21 mi12:28:061:10:0311:1636:45
11:50
+1:07
15K
9.32 mi13:01:531:43:5011:0833:47
10:52
-0:58
20K
12.43 mi13:38:272:20:2411:1836:34
11:46
+0:54
Half
13.11 mi13:46:232:28:2011:197:56
11:38
-0:08
25K
15.53 mi14:16:372:58:3411:3030:14
12:28
+0:50
30K
18.64 mi14:57:273:39:2411:4640:50
13:09
+0:41
20M
20.00 mi15:15:043:57:0111:5117:37
12:58
-0:11
21M
21.00 mi15:29:304:11:2711:5814:26
14:26
+1:28
35K
21.75 mi15:38:514:20:4812:009:21
12:30
-1:56
23M
23.00 mi15:55:014:36:5812:0316:10
12:55
+0:25
24M
24.00 mi16:06:504:48:4712:0211:49
11:49
-1:06
40K
24.85 mi16:17:194:59:1612:0210:29
12:16
+0:27
25.2M
25.20 mi16:22:045:04:0112:044:45
13:46
+1:30
Finish
26.22 mi16:33:485:15:4512:0311:44
11:31
-2:15

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

10:43 /mi

Average Pace

12:03 /mi

Slowest Pace

14:26 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:03:19

39% of race

Time at Steady Pace

1:38:38

31% of race

Time at Slower Pace

1:33:48

30% of race

Average Pace: 12:03 /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 mi11:51:2133:1810:4333:18
10:43
#25223
10K
6.21 mi12:28:061:10:0311:1636:45
11:50
#25890
15K
9.32 mi13:01:531:43:5011:0833:47
10:52
#25629
20K
12.43 mi13:38:272:20:2411:1836:34
11:46
#25583
Half
13.11 mi13:46:232:28:2011:197:56
11:38
#25588
25K
15.53 mi14:16:372:58:3411:3030:14
12:28
#25596
30K
18.64 mi14:57:273:39:2411:4640:50
13:09
#25610
20M
20.00 mi15:15:043:57:0111:5117:37
12:58
#25580
21M
21.00 mi15:29:304:11:2711:5814:26
14:26
#25581
35K
21.75 mi15:38:514:20:4812:009:21
12:30
#25562
23M
23.00 mi15:55:014:36:5812:0316:10
12:55
#25541
24M
24.00 mi16:06:504:48:4712:0211:49
11:49
#25506
40K
24.85 mi16:17:194:59:1612:0210:29
12:16
#25472
25.2M
25.20 mi16:22:045:04:0112:044:45
13:46
#25470
Finish
26.22 mi16:33:485:15:4512:0311:44
11:31
#25452
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi25223146441464425027(Top 94%)14532(Top 96%)14532(Top 645%)
10K6.21 mi3.10 mi25890-66714895-25114895-25126169(Top 98%)14998(Top 99%)14998(Top 666%)
15K9.32 mi3.11 mi25629+26114796+9914796+9925027(Top 94%)14532(Top 96%)14532(Top 645%)
20K12.43 mi3.11 mi25583+4614766+3014766+3025496(Top 96%)14701(Top 97%)14701(Top 653%)
Half13.11 mi0.68 mi25588-514765+114765+125587(Top 96%)14726(Top 97%)14726(Top 654%)
25K15.53 mi2.42 mi25596-814764+114764+125520(Top 96%)14694(Top 97%)14694(Top 652%)
30K18.64 mi3.11 mi25610-1414754+1014754+1025536(Top 96%)14653(Top 97%)14653(Top 651%)
20M20.00 mi1.36 mi25580+3014737+1714737+1725140(Top 94%)14449(Top 95%)14449(Top 642%)
21M21.00 mi1.00 mi25581-114735+214735+225376(Top 95%)14556(Top 96%)14556(Top 646%)
35K21.75 mi0.75 mi25562+1914720+1514720+1525171(Top 95%)14405(Top 95%)14405(Top 640%)
23M23.00 mi1.25 mi25541+2114705+1514705+1524999(Top 94%)14342(Top 95%)14342(Top 637%)
24M24.00 mi1.00 mi25506+3514685+2014685+2024293(Top 91%)13949(Top 92%)13949(Top 619%)
40K24.85 mi0.85 mi25472+3414664+2114664+2124187(Top 91%)13893(Top 92%)13893(Top 617%)
25.2M25.20 mi0.35 mi25470+214663+114663+124806(Top 93%)14193(Top 94%)14193(Top 630%)
Finish26.22 mi1.02 mi25452+1814650+1314650+1324701(Top 93%)14173(Top 93%)14173(Top 629%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 94%
×21story building
+97ft-345ft

Overall

25027

Males

14532

M45-49

14532

5K→10K

3.1 - 6.2 mi

Top 98%
×5story building
+79ft-138ft

Overall

26169

Males

14998

M45-49

14998

10K→15K

6.2 - 9.3 mi

Top 94%
×3story building
+67ft-78ft

Overall

25027

Males

14532

M45-49

14532

15K→20K

9.3 - 12.4 mi

Top 96%
×5story building
+106ft-86ft

Overall

25496

Males

14701

M45-49

14701

20K→Half

12.4 - 13.1 mi

Top 96%
×2story building
+19ft-37ft

Overall

25587

Males

14726

M45-49

14726

Half→25K

13.1 - 15.5 mi

Top 96%
×4story building
+66ft-88ft

Overall

25520

Males

14694

M45-49

14694

25K→30K

15.5 - 18.6 mi

Top 96%
×9story building
+181ft-148ft

Overall

25536

Males

14653

M45-49

14653

30K→20M

18.6 - 20.0 mi

Top 94%
×5story building
+64ft-50ft

Overall

25140

Males

14449

M45-49

14449

20M→21M

20.0 - 21.0 mi

Top 95%
×8story building
+106ft-24ft

Overall

25376

Males

14556

M45-49

14556

21M→35K

21.0 - 21.8 mi

Top 95%
×7story building
+17ft-86ft

Overall

25171

Males

14405

M45-49

14405

35K→23M

21.8 - 23.0 mi

Top 94%
×5story building
+23ft-63ft

Overall

24999

Males

14342

M45-49

14342

23M→24M

23.0 - 24.0 mi

Top 91%
×6story building
+12ft-82ft

Overall

24293

Males

13949

M45-49

13949

24M→40K

24.0 - 24.9 mi

Top 91%
×1story
+6ft-20ft

Overall

24187

Males

13893

M45-49

13893

40K→25.2M

24.9 - 25.2 mi

Top 93%
×1story
+13ft-16ft

Overall

24806

Males

14193

M45-49

14193

25.2M→Finish

25.2 - 26.2 mi

Top 93%
×2story building
+22ft-21ft

Overall

24701

Males

14173

M45-49

14173

Passing Analysis

Category:
Athletes Passed
749
Passed By
978
Net Change
-229
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25223
5K → 10K12679-667#25223#25890
10K → 15K2698+261#25890#25629
15K → 20K10660+46#25629#25583
20K → Half1116-5#25583#25588
Half → 25K4957-8#25588#25596
25K → 30K6074-14#25596#25610
30K → 20M4616+30#25610#25580
20M → 21M2930-1#25580#25581
21M → 35K278+19#25581#25562
35K → 23M309+21#25562#25541
23M → 24M405+35#25541#25506
24M → 40K384+34#25506#25472
40K → 25.2M75+2#25472#25470
25.2M → Finish257+18#25470#25452
TOTALS749978-229
📊

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