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BOSTON MARATHON 2023

Jeffrey Brennecke

Bib: 1428•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 12%
Gender (Male)
#0 / 15176
Top 20%
Masters (Masters Men)
#0 / 9891
Top 8%
Division (M40-44)
#0 / 2241
Top 21%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:27
Rank: #1300
Start → 5K
6:16/mi
19:27 split
10K· 6.21 mi
38:46
Rank: #1339 (-39)
5K → 10K
6:13/mi
19:19 split
15K· 9.32 mi
58:19
Rank: #1413 (-74)
10K → 15K
6:18/mi
19:33 split
20K· 12.43 mi
1:21:23
Rank: #2729 (-1316)
15K → 20K
7:25/mi
23:04 split
Half· 13.11 mi
1:25:38
Rank: #2648 (+81)
20K → Half
6:14/mi
4:15 split
25K· 15.53 mi
1:41:21
Rank: #2541 (+107)
Half → 25K
6:29/mi
15:43 split
30K· 18.64 mi
2:02:31
Rank: #2592 (-51)
25K → 30K
6:49/mi
21:10 split
20M
2:12:10
Rank: #2686 (-94)
30K → 20M
7:06/mi
9:39 split
21M
2:19:43
Rank: #2768 (-82)
20M → 21M
7:33/mi
7:33 split
35K· 21.75 mi
2:24:56
Rank: #2848 (-80)
21M → 35K
6:58/mi
5:13 split
23M
2:33:33
Rank: #2827 (+21)
35K → 23M
6:53/mi
8:37 split
24M
2:40:35
Rank: #2914 (-87)
23M → 24M
7:02/mi
7:02 split
40K· 24.85 mi
2:46:48
Rank: #2983 (-69)
24M → 40K
7:16/mi
6:13 split
25.2M
2:49:33
Rank: #3035 (-52)
40K → 25.2M
7:58/mi
2:45 split
Finish· 26.22 mi
2:57:01
Rank: #3194 (-159)
25.2M → Finish
7:20/mi
7:28 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:25:38
Pace6:32 /mi
2nd Half
Distance13.11 mi
Time1:31:23
Pace6:58 /mi
📊Positive Split: 6.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:5819:276:1619:27
6:16
-
10K
6.21 mi10:39:1738:466:1419:19
6:13
-0:03
15K
9.32 mi10:58:5058:196:1519:33
6:18
+0:05
20K
12.43 mi11:21:541:21:236:3323:04
7:25
+1:07
Half
13.11 mi11:26:091:25:386:324:15
6:14
-1:11
25K
15.53 mi11:41:521:41:216:3115:43
6:29
+0:15
30K
18.64 mi12:03:022:02:316:3421:10
6:49
+0:20
20M
20.00 mi12:12:412:12:106:369:39
7:06
+0:17
21M
21.00 mi12:20:142:19:436:397:33
7:33
+0:27
35K
21.75 mi12:25:272:24:566:405:13
6:58
-0:35
23M
23.00 mi12:34:042:33:336:418:37
6:53
-0:05
24M
24.00 mi12:41:062:40:356:417:02
7:02
+0:09
40K
24.85 mi12:47:192:46:486:436:13
7:16
+0:14
25.2M
25.20 mi12:50:042:49:336:442:45
7:58
+0:42
Finish
26.22 mi12:57:322:57:016:457:28
7:20
-0:38

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

6:13 /mi

Average Pace

6:45 /mi

Slowest Pace

7:58 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:18:17

44% of race

Time at Steady Pace

51:41

29% of race

Time at Slower Pace

47:03

27% of race

Average Pace: 6:45 /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 mi10:19:5819:276:1619:27
6:16
#1300
10K
6.21 mi10:39:1738:466:1419:19
6:13
#1339
15K
9.32 mi10:58:5058:196:1519:33
6:18
#1413
20K
12.43 mi11:21:541:21:236:3323:04
7:25
#2729
Half
13.11 mi11:26:091:25:386:324:15
6:14
#2648
25K
15.53 mi11:41:521:41:216:3115:43
6:29
#2541
30K
18.64 mi12:03:022:02:316:3421:10
6:49
#2592
20M
20.00 mi12:12:412:12:106:369:39
7:06
#2686
21M
21.00 mi12:20:142:19:436:397:33
7:33
#2768
35K
21.75 mi12:25:272:24:566:405:13
6:58
#2848
23M
23.00 mi12:34:042:33:336:418:37
6:53
#2827
24M
24.00 mi12:41:062:40:356:417:02
7:02
#2914
40K
24.85 mi12:47:192:46:486:436:13
7:16
#2983
25.2M
25.20 mi12:50:042:49:336:442:45
7:58
#3035
Finish
26.22 mi12:57:322:57:016:457:28
7:20
#3194
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi1300123412341626(Top 6%)1553(Top 10%)1553(Top 69%)
10K6.21 mi3.10 mi1339-391273-391273-391422(Top 5%)1357(Top 9%)1357(Top 61%)
15K9.32 mi3.11 mi1413-741348-751348-751626(Top 6%)1553(Top 10%)1553(Top 69%)
20K12.43 mi3.11 mi2729-13162608-12602608-12608689(Top 33%)7304(Top 48%)7304(Top 326%)
Half13.11 mi0.68 mi2648+812530+782530+781534(Top 6%)1470(Top 10%)1470(Top 66%)
25K15.53 mi2.42 mi2541+1072433+972433+972095(Top 8%)2009(Top 13%)2009(Top 90%)
30K18.64 mi3.11 mi2592-512476-432476-433066(Top 12%)2896(Top 19%)2896(Top 129%)
20M20.00 mi1.36 mi2686-942567-912567-914597(Top 17%)4216(Top 28%)4216(Top 188%)
21M21.00 mi1.00 mi2768-822646-792646-794793(Top 18%)4320(Top 28%)4320(Top 193%)
35K21.75 mi0.75 mi2848-802721-752721-755133(Top 19%)4584(Top 30%)4584(Top 205%)
23M23.00 mi1.25 mi2827+212694+272694+273109(Top 12%)2895(Top 19%)2895(Top 129%)
24M24.00 mi1.00 mi2914-872770-762770-764814(Top 18%)4283(Top 28%)4283(Top 191%)
40K24.85 mi0.85 mi2983-692830-602830-605221(Top 20%)4482(Top 30%)4482(Top 200%)
25.2M25.20 mi0.35 mi3035-522874-442874-446229(Top 23%)5065(Top 33%)5065(Top 226%)
Finish26.22 mi1.02 mi3194-1593022-1483022-1487248(Top 27%)5703(Top 38%)5703(Top 254%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 6%
×21story building
+97ft-345ft

Overall

1626

Males

1553

M40-44

1553

5K→10K

3.1 - 6.2 mi

Top 5%
×5story building
+79ft-138ft

Overall

1422

Males

1357

M40-44

1357

10K→15K

6.2 - 9.3 mi

Top 6%
×3story building
+67ft-78ft

Overall

1626

Males

1553

M40-44

1553

15K→20K

9.3 - 12.4 mi

Top 33%
×5story building
+106ft-86ft

Overall

8689

Males

7304

M40-44

7304

20K→Half

12.4 - 13.1 mi

Top 6%
×2story building
+19ft-37ft

Overall

1534

Males

1470

M40-44

1470

Half→25K

13.1 - 15.5 mi

Top 8%
×4story building
+66ft-88ft

Overall

2095

Males

2009

M40-44

2009

25K→30K

15.5 - 18.6 mi

Top 12%
×9story building
+181ft-148ft

Overall

3066

Males

2896

M40-44

2896

30K→20M

18.6 - 20.0 mi

Top 17%
×5story building
+64ft-50ft

Overall

4597

Males

4216

M40-44

4216

20M→21M

20.0 - 21.0 mi

Top 18%
×8story building
+106ft-24ft

Overall

4793

Males

4320

M40-44

4320

21M→35K

21.0 - 21.8 mi

Top 19%
×7story building
+17ft-86ft

Overall

5133

Males

4584

M40-44

4584

35K→23M

21.8 - 23.0 mi

Top 12%
×5story building
+23ft-63ft

Overall

3109

Males

2895

M40-44

2895

23M→24M

23.0 - 24.0 mi

Top 18%
×6story building
+12ft-82ft

Overall

4814

Males

4283

M40-44

4283

24M→40K

24.0 - 24.9 mi

Top 20%
×1story
+6ft-20ft

Overall

5221

Males

4482

M40-44

4482

40K→25.2M

24.9 - 25.2 mi

Top 23%
×1story
+13ft-16ft

Overall

6229

Males

5065

M40-44

5065

25.2M→Finish

25.2 - 26.2 mi

Top 27%
×2story building
+22ft-21ft

Overall

7248

Males

5703

M40-44

5703

Passing Analysis

Category:
Athletes Passed
501
Passed By
2395
Net Change
-1894
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1300
5K → 10K5998-39#1300#1339
10K → 15K2498-74#1339#1413
15K → 20K11317-1316#1413#2729
20K → Half810+81#2729#2648
Half → 25K11710+107#2648#2541
25K → 30K54105-51#2541#2592
30K → 20M17111-94#2592#2686
20M → 21M18100-82#2686#2768
21M → 35K1191-80#2768#2848
35K → 23M6039+21#2848#2827
23M → 24M18105-87#2827#2914
24M → 40K2493-69#2914#2983
40K → 25.2M456-52#2983#3035
25.2M → Finish13172-159#3035#3194
TOTALS5012395-1894
📊

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