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BOSTON MARATHON 2023

Henry Janssen

Bib: 595•M

IL

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 4%
Gender (Male)
#0 / 15176
Top 7%
Division (M18-39)
#0 / 5285
Top 16%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:34
Rank: #646
Start → 5K
18:34 | 5:59/mi
10K· 6.21 mi
36:57
Rank: #628 (+18)
5K → 10K
18:23 | 5:55/mi
15K· 9.32 mi
55:27
Rank: #617 (+11)
10K → 15K
18:30 | 5:57/mi
20K· 12.43 mi
1:14:16
Rank: #629 (-12)
15K → 20K
18:49 | 6:03/mi
Half· 13.11 mi
1:18:23
Rank: #634 (-5)
20K → Half
4:07 | 6:02/mi
25K· 15.53 mi
1:33:29
Rank: #677 (-43)
Half → 25K
15:06 | 6:14/mi
30K· 18.64 mi
1:53:48
Rank: #788 (-111)
25K → 30K
20:19 | 6:32/mi
20M
2:02:58
Rank: #851 (-63)
30K → 20M
9:10 | 6:45/mi
21M
2:10:02
Rank: #896 (-45)
20M → 21M
7:04 | 7:04/mi
35K· 21.75 mi
2:14:56
Rank: #931 (-35)
21M → 35K
4:54 | 6:33/mi
23M
2:23:25
Rank: #963 (-32)
35K → 23M
8:29 | 6:47/mi
24M
2:30:08
Rank: #1000 (-37)
23M → 24M
6:43 | 6:43/mi
40K· 24.85 mi
2:35:54
Rank: #1033 (-33)
24M → 40K
5:46 | 6:45/mi
25.2M
2:38:21
Rank: #1048 (-15)
40K → 25.2M
2:27 | 7:06/mi
Finish· 26.22 mi
2:44:49
Rank: #1065 (-17)
25.2M → Finish
6:28 | 6:21/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:18:23
Pace5:59 /mi
2nd Half
Distance13.11 mi
Time1:26:26
Pace6:36 /mi
📊Positive Split: 10.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:18:3918:345:5918:34
5:59
-
10K
6.21 mi10:37:0236:575:5718:23
5:55
-0:04
15K
9.32 mi10:55:3255:275:5718:30
5:57
+0:02
20K
12.43 mi11:14:211:14:165:5918:49
6:03
+0:06
Half
13.11 mi11:18:281:18:235:594:07
6:02
-0:01
25K
15.53 mi11:33:341:33:296:0115:06
6:14
+0:12
30K
18.64 mi11:53:531:53:486:0620:19
6:32
+0:18
20M
20.00 mi12:03:032:02:586:099:10
6:45
+0:13
21M
21.00 mi12:10:072:10:026:127:04
7:04
+0:19
35K
21.75 mi12:15:012:14:566:124:54
6:33
-0:31
23M
23.00 mi12:23:302:23:256:148:29
6:47
+0:14
24M
24.00 mi12:30:132:30:086:156:43
6:43
-0:04
40K
24.85 mi12:35:592:35:546:165:46
6:45
+0:02
25.2M
25.20 mi12:38:262:38:216:172:27
7:06
+0:21
Finish
26.22 mi12:44:542:44:496:176:28
6:21
-0:45

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

5:55 /mi

Average Pace

6:17 /mi

Slowest Pace

7:06 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:33:29

57% of race

Time at Steady Pace

38:24

23% of race

Time at Slower Pace

32:56

20% of race

Average Pace: 6:17 /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 mi10:18:3918:345:5918:34
5:59
#646
10K
6.21 mi10:37:0236:575:5718:23
5:55
#628
15K
9.32 mi10:55:3255:275:5718:30
5:57
#617
20K
12.43 mi11:14:211:14:165:5918:49
6:03
#629
Half
13.11 mi11:18:281:18:235:594:07
6:02
#634
25K
15.53 mi11:33:341:33:296:0115:06
6:14
#677
30K
18.64 mi11:53:531:53:486:0620:19
6:32
#788
20M
20.00 mi12:03:032:02:586:099:10
6:45
#851
21M
21.00 mi12:10:072:10:026:127:04
7:04
#896
35K
21.75 mi12:15:012:14:566:124:54
6:33
#931
23M
23.00 mi12:23:302:23:256:148:29
6:47
#963
24M
24.00 mi12:30:132:30:086:156:43
6:43
#1000
40K
24.85 mi12:35:592:35:546:165:46
6:45
#1033
25.2M
25.20 mi12:38:262:38:216:172:27
7:06
#1048
Finish
26.22 mi12:44:542:44:496:176:28
6:21
#1065
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi646602602617(Top 2%)574(Top 4%)574(Top 11%)
10K6.21 mi3.10 mi628+18584+18584+18624(Top 2%)581(Top 4%)581(Top 11%)
15K9.32 mi3.11 mi617+11574+10574+10617(Top 2%)574(Top 4%)574(Top 11%)
20K12.43 mi3.11 mi629-12586-12586-12678(Top 3%)636(Top 4%)636(Top 12%)
Half13.11 mi0.68 mi634-5591-5591-5862(Top 3%)820(Top 5%)820(Top 16%)
25K15.53 mi2.42 mi677-43636-45636-451064(Top 4%)1013(Top 7%)1013(Top 19%)
30K18.64 mi3.11 mi788-111746-110746-1101707(Top 6%)1634(Top 11%)1634(Top 31%)
20M20.00 mi1.36 mi851-63806-60806-602473(Top 9%)2344(Top 15%)2344(Top 44%)
21M21.00 mi1.00 mi896-45849-43849-432430(Top 9%)2293(Top 15%)2293(Top 43%)
35K21.75 mi0.75 mi931-35884-35884-352643(Top 10%)2486(Top 16%)2486(Top 47%)
23M23.00 mi1.25 mi963-32916-32916-322486(Top 9%)2332(Top 15%)2332(Top 44%)
24M24.00 mi1.00 mi1000-37951-35951-353150(Top 12%)2916(Top 19%)2916(Top 55%)
40K24.85 mi0.85 mi1033-33982-31982-312518(Top 9%)2332(Top 15%)2332(Top 44%)
25.2M25.20 mi0.35 mi1048-15996-14996-142059(Top 8%)1915(Top 13%)1915(Top 36%)
Finish26.22 mi1.02 mi1065-171014-181014-181786(Top 7%)1670(Top 11%)1670(Top 32%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 2%
×21stories
+97ft-345ft

Overall

617

Males

574

M18-39

574

5K→10K

3.1 - 6.2 mi

Top 2%
×5stories
+79ft-138ft

Overall

624

Males

581

M18-39

581

10K→15K

6.2 - 9.3 mi

Top 2%
×3stories
+67ft-78ft

Overall

617

Males

574

M18-39

574

15K→20K

9.3 - 12.4 mi

Top 3%
×5stories
+106ft-86ft

Overall

678

Males

636

M18-39

636

20K→Half

12.4 - 13.1 mi

Top 3%
×2stories
+19ft-37ft

Overall

862

Males

820

M18-39

820

Half→25K

13.1 - 15.5 mi

Top 4%
×4stories
+66ft-88ft

Overall

1064

Males

1013

M18-39

1013

25K→30K

15.5 - 18.6 mi

Top 6%
×9stories
+181ft-148ft

Overall

1707

Males

1634

M18-39

1634

30K→20M

18.6 - 20.0 mi

Top 9%
×5stories
+64ft-50ft

Overall

2473

Males

2344

M18-39

2344

20M→21M

20.0 - 21.0 mi

Top 9%
×8stories
+106ft-24ft

Overall

2430

Males

2293

M18-39

2293

21M→35K

21.0 - 21.8 mi

Top 10%
×7stories
+17ft-86ft

Overall

2643

Males

2486

M18-39

2486

35K→23M

21.8 - 23.0 mi

Top 9%
×5stories
+23ft-63ft

Overall

2486

Males

2332

M18-39

2332

23M→24M

23.0 - 24.0 mi

Top 12%
×6stories
+12ft-82ft

Overall

3150

Males

2916

M18-39

2916

24M→40K

24.0 - 24.9 mi

Top 9%
×1story
+6ft-20ft

Overall

2518

Males

2332

M18-39

2332

40K→25.2M

24.9 - 25.2 mi

Top 8%
×1story
+13ft-16ft

Overall

2059

Males

1915

M18-39

1915

25.2M→Finish

25.2 - 26.2 mi

Top 7%
×2stories
+22ft-21ft

Overall

1786

Males

1670

M18-39

1670

Passing Analysis

Category:
Athletes Passed
143
Passed By
562
Net Change
-419
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#646
5K → 10K3921+18#646#628
10K → 15K2716+11#628#617
15K → 20K1325-12#617#629
20K → Half27-5#629#634
Half → 25K952-43#634#677
25K → 30K3114-111#677#788
30K → 20M265-63#788#851
20M → 21M853-45#851#896
21M → 35K439-35#896#931
35K → 23M739-32#931#963
23M → 24M744-37#963#1000
24M → 40K740-33#1000#1033
40K → 25.2M318-15#1033#1048
25.2M → Finish1229-17#1048#1065
TOTALS143562-419
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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