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BOSTON MARATHON 2023

David Jacobson

Bib: 3341•M

OR

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 11%
Gender (Male)
#0 / 15176
Top 19%
Division (M18-39)
#0 / 5285
Top 41%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:01
Rank: #4286
Start → 5K
21:01 | 6:46/mi
10K· 6.21 mi
41:28
Rank: #3720 (+566)
5K → 10K
20:27 | 6:35/mi
15K· 9.32 mi
1:01:59
Rank: #3557 (+163)
10K → 15K
20:31 | 6:36/mi
20K· 12.43 mi
1:22:41
Rank: #3473 (+84)
15K → 20K
20:42 | 6:40/mi
Half· 13.11 mi
1:27:14
Rank: #3489 (-16)
20K → Half
4:33 | 6:40/mi
25K· 15.53 mi
1:43:32
Rank: #3467 (+22)
Half → 25K
16:18 | 6:43/mi
30K· 18.64 mi
2:04:38
Rank: #3334 (+133)
25K → 30K
21:06 | 6:47/mi
20M
2:13:55
Rank: #3258 (+76)
30K → 20M
9:17 | 6:50/mi
21M
2:20:55
Rank: #3157 (+101)
20M → 21M
7:00 | 7:00/mi
35K· 21.75 mi
2:25:54
Rank: #3145 (+12)
21M → 35K
4:59 | 6:40/mi
23M
2:34:36
Rank: #3140 (+5)
35K → 23M
8:42 | 6:57/mi
24M
2:41:17
Rank: #3115 (+25)
23M → 24M
6:41 | 6:41/mi
40K· 24.85 mi
2:47:10
Rank: #3087 (+28)
24M → 40K
5:53 | 6:53/mi
25.2M
2:49:41
Rank: #3068 (+19)
40K → 25.2M
2:31 | 7:18/mi
Finish· 26.22 mi
2:56:26
Rank: #3042 (+26)
25.2M → Finish
6:45 | 6:37/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:14
Pace6:39 /mi
2nd Half
Distance13.11 mi
Time1:29:12
Pace6:48 /mi
📊Positive Split: 2.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:4421:016:4621:01
6:46
-
10K
6.21 mi10:44:1141:286:4020:27
6:35
-0:11
15K
9.32 mi11:04:421:01:596:3920:31
6:36
+0:01
20K
12.43 mi11:25:241:22:416:3920:42
6:40
+0:04
Half
13.11 mi11:29:571:27:146:394:33
6:40
0:00
25K
15.53 mi11:46:151:43:326:4016:18
6:43
+0:03
30K
18.64 mi12:07:212:04:386:4121:06
6:47
+0:04
20M
20.00 mi12:16:382:13:556:429:17
6:50
+0:03
21M
21.00 mi12:23:382:20:556:437:00
7:00
+0:10
35K
21.75 mi12:28:372:25:546:434:59
6:40
-0:20
23M
23.00 mi12:37:192:34:366:438:42
6:57
+0:17
24M
24.00 mi12:44:002:41:176:436:41
6:41
-0:16
40K
24.85 mi12:49:532:47:106:445:53
6:53
+0:12
25.2M
25.20 mi12:52:242:49:416:442:31
7:18
+0:25
Finish
26.22 mi12:59:092:56:266:446:45
6:37
-0:41

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

6:35 /mi

Average Pace

6:44 /mi

Slowest Pace

7:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:53:55

99% of race

Time at Steady Pace

2:31

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:44 /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 mi10:23:4421:016:4621:01
6:46
#4286
10K
6.21 mi10:44:1141:286:4020:27
6:35
#3720
15K
9.32 mi11:04:421:01:596:3920:31
6:36
#3557
20K
12.43 mi11:25:241:22:416:3920:42
6:40
#3473
Half
13.11 mi11:29:571:27:146:394:33
6:40
#3489
25K
15.53 mi11:46:151:43:326:4016:18
6:43
#3467
30K
18.64 mi12:07:212:04:386:4121:06
6:47
#3334
20M
20.00 mi12:16:382:13:556:429:17
6:50
#3258
21M
21.00 mi12:23:382:20:556:437:00
7:00
#3157
35K
21.75 mi12:28:372:25:546:434:59
6:40
#3145
23M
23.00 mi12:37:192:34:366:438:42
6:57
#3140
24M
24.00 mi12:44:002:41:176:436:41
6:41
#3115
40K
24.85 mi12:49:532:47:106:445:53
6:53
#3087
25.2M
25.20 mi12:52:242:49:416:442:31
7:18
#3068
Finish
26.22 mi12:59:092:56:266:446:45
6:37
#3042
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi4286400440043320(Top 12%)3150(Top 21%)3150(Top 60%)
10K6.21 mi3.10 mi3720+5663509+4953509+4953356(Top 13%)3193(Top 21%)3193(Top 60%)
15K9.32 mi3.11 mi3557+1633364+1453364+1453320(Top 12%)3150(Top 21%)3150(Top 60%)
20K12.43 mi3.11 mi3473+843291+733291+733270(Top 12%)3104(Top 20%)3104(Top 59%)
Half13.11 mi0.68 mi3489-163304-133304-133964(Top 15%)3716(Top 24%)3716(Top 70%)
25K15.53 mi2.42 mi3467+223291+133291+133527(Top 13%)3332(Top 22%)3332(Top 63%)
30K18.64 mi3.11 mi3334+1333164+1273164+1272924(Top 11%)2769(Top 18%)2769(Top 52%)
20M20.00 mi1.36 mi3258+763091+733091+733010(Top 11%)2830(Top 19%)2830(Top 54%)
21M21.00 mi1.00 mi3157+1012994+972994+972162(Top 8%)2043(Top 13%)2043(Top 39%)
35K21.75 mi0.75 mi3145+122983+112983+113324(Top 12%)3094(Top 20%)3094(Top 59%)
23M23.00 mi1.25 mi3140+52978+52978+53495(Top 13%)3236(Top 21%)3236(Top 61%)
24M24.00 mi1.00 mi3115+252953+252953+253004(Top 11%)2788(Top 18%)2788(Top 53%)
40K24.85 mi0.85 mi3087+282924+292924+293209(Top 12%)2939(Top 19%)2939(Top 56%)
25.2M25.20 mi0.35 mi3068+192906+182906+182914(Top 11%)2669(Top 18%)2669(Top 51%)
Finish26.22 mi1.02 mi3042+262881+252881+253090(Top 12%)2785(Top 18%)2785(Top 53%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 12%
×21stories
+97ft-345ft

Overall

3320

Males

3150

M18-39

3150

5K→10K

3.1 - 6.2 mi

Top 13%
×5stories
+79ft-138ft

Overall

3356

Males

3193

M18-39

3193

10K→15K

6.2 - 9.3 mi

Top 12%
×3stories
+67ft-78ft

Overall

3320

Males

3150

M18-39

3150

15K→20K

9.3 - 12.4 mi

Top 12%
×5stories
+106ft-86ft

Overall

3270

Males

3104

M18-39

3104

20K→Half

12.4 - 13.1 mi

Top 15%
×2stories
+19ft-37ft

Overall

3964

Males

3716

M18-39

3716

Half→25K

13.1 - 15.5 mi

Top 13%
×4stories
+66ft-88ft

Overall

3527

Males

3332

M18-39

3332

25K→30K

15.5 - 18.6 mi

Top 11%
×9stories
+181ft-148ft

Overall

2924

Males

2769

M18-39

2769

30K→20M

18.6 - 20.0 mi

Top 11%
×5stories
+64ft-50ft

Overall

3010

Males

2830

M18-39

2830

20M→21M

20.0 - 21.0 mi

Top 8%
×8stories
+106ft-24ft

Overall

2162

Males

2043

M18-39

2043

21M→35K

21.0 - 21.8 mi

Top 12%
×7stories
+17ft-86ft

Overall

3324

Males

3094

M18-39

3094

35K→23M

21.8 - 23.0 mi

Top 13%
×5stories
+23ft-63ft

Overall

3495

Males

3236

M18-39

3236

23M→24M

23.0 - 24.0 mi

Top 11%
×6stories
+12ft-82ft

Overall

3004

Males

2788

M18-39

2788

24M→40K

24.0 - 24.9 mi

Top 12%
×1story
+6ft-20ft

Overall

3209

Males

2939

M18-39

2939

40K→25.2M

24.9 - 25.2 mi

Top 11%
×1story
+13ft-16ft

Overall

2914

Males

2669

M18-39

2669

25.2M→Finish

25.2 - 26.2 mi

Top 12%
×2stories
+22ft-21ft

Overall

3090

Males

2785

M18-39

2785

Passing Analysis

Category:
Athletes Passed
1688
Passed By
444
Net Change
+1244
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4286
5K → 10K61246+566#4286#3720
10K → 15K20441+163#3720#3557
15K → 20K12238+84#3557#3473
20K → Half1430-16#3473#3489
Half → 25K7856+22#3489#3467
25K → 30K16532+133#3467#3334
30K → 20M10024+76#3334#3258
20M → 21M1054+101#3258#3157
21M → 35K3119+12#3157#3145
35K → 23M5651+5#3145#3140
23M → 24M5631+25#3140#3115
24M → 40K5527+28#3115#3087
40K → 25.2M278+19#3087#3068
25.2M → Finish6337+26#3068#3042
TOTALS1688444+1244
📊

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