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BOSTON MARATHON 2023

Michael Jacobsen

Bib: 15248•M

AZ

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M50-54)
#0 / 2052
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
7:58/mi
24:44
↑ 97↓ 3451.5%
10K· 6.21 mi
8:02/mi
49:43
↑ 79↓ 1380.4%
15K· 9.32 mi
8:06/mi
1:14:52
↑ 67↓ 78
20K· 12.43 mi
8:12/mi
1:40:20
↑ 106↓ 860.1%
Half· 13.11 mi
8:10/mi
1:45:54
↑ 19↓ 370.5%
25K· 15.53 mi
8:43/mi
2:07:01
↑ 66↓ 880.2%
30K· 18.64 mi
8:49/mi
2:34:26
↑ 181↓ 1480.2%
20M
8:42/mi
2:46:15
↑ 64↓ 500.2%
21M
9:30/mi
2:55:45
↑ 106↓ 241.6%
35K· 21.75 mi
8:35/mi
3:02:10
↑ 17↓ 861.7%
23M
9:06/mi
3:13:34
↑ 23↓ 630.6%
24M
8:43/mi
3:22:17
↓ 821.3%
40K· 24.85 mi
8:57/mi
3:29:56
↓ 200.3%
25.2M
9:25/mi
3:33:11
↑ 13↓ 160.2%
Finish· 26.22 mi
8:19/mi
3:41:40
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:54
Pace8:05 /mi
2nd Half
Distance13.11 mi
Time1:55:46
Pace8:50 /mi
📊Positive Split: 9.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:3624:447:5824:44
7:58
-
10K
6.21 mi11:19:3549:438:0024:59
8:02
+0:04
15K
9.32 mi11:44:441:14:528:0225:09
8:06
+0:04
20K
12.43 mi12:10:121:40:208:0425:28
8:12
+0:06
Half
13.11 mi12:15:461:45:548:055:34
8:10
-0:02
25K
15.53 mi12:36:532:07:018:1121:07
8:43
+0:33
30K
18.64 mi13:04:182:34:268:1727:25
8:49
+0:06
20M
20.00 mi13:16:072:46:158:1911:49
8:42
-0:07
21M
21.00 mi13:25:372:55:458:229:30
9:30
+0:48
35K
21.75 mi13:32:023:02:108:236:25
8:35
-0:55
23M
23.00 mi13:43:263:13:348:2511:24
9:06
+0:31
24M
24.00 mi13:52:093:22:178:268:43
8:43
-0:23
40K
24.85 mi13:59:483:29:568:277:39
8:57
+0:14
25.2M
25.20 mi14:03:033:33:118:283:15
9:25
+0:28
Finish
26.22 mi14:11:323:41:408:288:29
8:19
-1:06

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

7:58 /mi

Average Pace

8:28 /mi

Slowest Pace

9:30 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:42:27

73% of race

Time at Steady Pace

46:28

21% of race

Time at Slower Pace

12:45

6% of race

Average Pace: 8:27 /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 mi10:54:3624:447:5824:44
7:58
#13724
10K
6.21 mi11:19:3549:438:0024:59
8:02
#14391
15K
9.32 mi11:44:441:14:528:0225:09
8:06
#14589
20K
12.43 mi12:10:121:40:208:0425:28
8:12
#14674
Half
13.11 mi12:15:461:45:548:055:34
8:10
#14719
25K
15.53 mi12:36:532:07:018:1121:07
8:43
#15178
30K
18.64 mi13:04:182:34:268:1727:25
8:49
#15370
20M
20.00 mi13:16:072:46:158:1911:49
8:42
#15314
21M
21.00 mi13:25:372:55:458:229:30
9:30
#15323
35K
21.75 mi13:32:023:02:108:236:25
8:35
#15312
23M
23.00 mi13:43:263:13:348:2511:24
9:06
#15404
24M
24.00 mi13:52:093:22:178:268:43
8:43
#15416
40K
24.85 mi13:59:483:29:568:277:39
8:57
#15437
25.2M
25.20 mi14:03:033:33:118:283:15
9:25
#15407
Finish
26.22 mi14:11:323:41:408:288:29
8:19
#15356
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi137249850985015124(Top 57%)10358(Top 68%)10358(Top 505%)
10K6.21 mi3.10 mi14391-66710093-24310093-24315093(Top 57%)10351(Top 68%)10351(Top 504%)
15K9.32 mi3.11 mi14589-19810163-7010163-7015124(Top 57%)10358(Top 68%)10358(Top 505%)
20K12.43 mi3.11 mi14674-8510179-1610179-1614934(Top 56%)10245(Top 68%)10245(Top 499%)
Half13.11 mi0.68 mi14719-4510193-1410193-1415459(Top 58%)10476(Top 69%)10476(Top 511%)
25K15.53 mi2.42 mi15178-45910335-14210335-14217409(Top 65%)11154(Top 73%)11154(Top 544%)
30K18.64 mi3.11 mi15370-19210359-2410359-2416204(Top 61%)10566(Top 70%)10566(Top 515%)
20M20.00 mi1.36 mi15314+5610324+3510324+3514817(Top 56%)9906(Top 65%)9906(Top 483%)
21M21.00 mi1.00 mi15323-910294+3010294+3015939(Top 60%)10323(Top 68%)10323(Top 503%)
35K21.75 mi0.75 mi15312+1110280+1410280+1415694(Top 59%)10149(Top 67%)10149(Top 495%)
23M23.00 mi1.25 mi15404-9210281-110281-116548(Top 62%)10477(Top 69%)10477(Top 511%)
24M24.00 mi1.00 mi15416-1210277+410277+415735(Top 59%)10058(Top 66%)10058(Top 490%)
40K24.85 mi0.85 mi15437-2110263+1410263+1415834(Top 59%)10055(Top 66%)10055(Top 490%)
25.2M25.20 mi0.35 mi15407+3010248+1510248+1514772(Top 55%)9576(Top 63%)9576(Top 467%)
Finish26.22 mi1.02 mi15356+5110216+3210216+3214232(Top 53%)9351(Top 62%)9351(Top 456%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 57%
×21story building
+97ft-345ft

Overall

15124

Males

10358

M50-54

10358

5K→10K

3.1 - 6.2 mi

Top 57%
×5story building
+79ft-138ft

Overall

15093

Males

10351

M50-54

10351

10K→15K

6.2 - 9.3 mi

Top 57%
×3story building
+67ft-78ft

Overall

15124

Males

10358

M50-54

10358

15K→20K

9.3 - 12.4 mi

Top 56%
×5story building
+106ft-86ft

Overall

14934

Males

10245

M50-54

10245

20K→Half

12.4 - 13.1 mi

Top 58%
×2story building
+19ft-37ft

Overall

15459

Males

10476

M50-54

10476

Half→25K

13.1 - 15.5 mi

Top 65%
×4story building
+66ft-88ft

Overall

17409

Males

11154

M50-54

11154

25K→30K

15.5 - 18.6 mi

Top 61%
×9story building
+181ft-148ft

Overall

16204

Males

10566

M50-54

10566

30K→20M

18.6 - 20.0 mi

Top 56%
×5story building
+64ft-50ft

Overall

14817

Males

9906

M50-54

9906

20M→21M

20.0 - 21.0 mi

Top 60%
×8story building
+106ft-24ft

Overall

15939

Males

10323

M50-54

10323

21M→35K

21.0 - 21.8 mi

Top 59%
×7story building
+17ft-86ft

Overall

15694

Males

10149

M50-54

10149

35K→23M

21.8 - 23.0 mi

Top 62%
×5story building
+23ft-63ft

Overall

16548

Males

10477

M50-54

10477

23M→24M

23.0 - 24.0 mi

Top 59%
×6story building
+12ft-82ft

Overall

15735

Males

10058

M50-54

10058

24M→40K

24.0 - 24.9 mi

Top 59%
×1story
+6ft-20ft

Overall

15834

Males

10055

M50-54

10055

40K→25.2M

24.9 - 25.2 mi

Top 55%
×1story
+13ft-16ft

Overall

14772

Males

9576

M50-54

9576

25.2M→Finish

25.2 - 26.2 mi

Top 53%
×2story building
+22ft-21ft

Overall

14232

Males

9351

M50-54

9351

Passing Analysis

Category:
Athletes Passed
1123
Passed By
2755
Net Change
-1632
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13724
5K → 10K83750-667#13724#14391
10K → 15K127325-198#14391#14589
15K → 20K154239-85#14589#14674
20K → Half1358-45#14674#14719
Half → 25K49508-459#14719#15178
25K → 30K124316-192#15178#15370
30K → 20M11660+56#15370#15314
20M → 21M8897-9#15314#15323
21M → 35K4837+11#15323#15312
35K → 23M64156-92#15312#15404
23M → 24M5870-12#15404#15416
24M → 40K5374-21#15416#15437
40K → 25.2M4717+30#15437#15407
25.2M → Finish9948+51#15407#15356
TOTALS11232755-1632
📊

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