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BOSTON MARATHON 2023

Jessica Jakobsen

Bib: 18797•F

CO

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F45-49)
#0 / 1817
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:45
Rank: #18309
Start → 5K
8:37/mi
26:45 split
10K· 6.21 mi
53:46
Rank: #18827 (-518)
5K → 10K
8:42/mi
27:01 split
15K· 9.32 mi
1:21:07
Rank: #19068 (-241)
10K → 15K
8:48/mi
27:21 split
20K· 12.43 mi
1:49:47
Rank: #19514 (-446)
15K → 20K
9:14/mi
28:40 split
Half· 13.11 mi
1:56:09
Rank: #19660 (-146)
20K → Half
9:20/mi
6:22 split
25K· 15.53 mi
2:20:26
Rank: #20327 (-667)
Half → 25K
10:01/mi
24:17 split
30K· 18.64 mi
2:52:30
Rank: #20649 (-322)
25K → 30K
10:19/mi
32:04 split
20M
3:08:23
Rank: #21033 (-384)
30K → 20M
11:41/mi
15:53 split
21M
3:21:35
Rank: #21345 (-312)
20M → 21M
13:12/mi
13:12 split
35K· 21.75 mi
3:29:28
Rank: #21399 (-54)
21M → 35K
10:32/mi
7:53 split
23M
3:45:02
Rank: #21702 (-303)
35K → 23M
12:26/mi
15:34 split
24M
3:56:08
Rank: #21798 (-96)
23M → 24M
11:06/mi
11:06 split
40K· 24.85 mi
4:05:03
Rank: #21759 (+39)
24M → 40K
10:26/mi
8:55 split
25.2M
4:08:59
Rank: #21744 (+15)
40K → 25.2M
11:24/mi
3:56 split
Finish· 26.22 mi
4:18:54
Rank: #21726 (+18)
25.2M → Finish
9:44/mi
9:55 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:56:09
Pace8:52 /mi
2nd Half
Distance13.11 mi
Time2:22:45
Pace10:53 /mi
📊Positive Split: 22.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:4626:458:3726:45
8:37
-
10K
6.21 mi11:44:4753:468:3927:01
8:42
+0:05
15K
9.32 mi12:12:081:21:078:4227:21
8:48
+0:06
20K
12.43 mi12:40:481:49:478:5028:40
9:14
+0:26
Half
13.11 mi12:47:101:56:098:526:22
9:20
+0:06
25K
15.53 mi13:11:272:20:269:0224:17
10:01
+0:41
30K
18.64 mi13:43:312:52:309:1532:04
10:19
+0:18
20M
20.00 mi13:59:243:08:239:2515:53
11:41
+1:22
21M
21.00 mi14:12:363:21:359:3613:12
13:12
+1:31
35K
21.75 mi14:20:293:29:289:387:53
10:32
-2:40
23M
23.00 mi14:36:033:45:029:4715:34
12:26
+1:54
24M
24.00 mi14:47:093:56:089:5011:06
11:06
-1:20
40K
24.85 mi14:56:044:05:039:528:55
10:26
-0:40
25.2M
25.20 mi15:00:004:08:599:533:56
11:24
+0:58
Finish
26.22 mi15:09:554:18:549:539:55
9:44
-1:40

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

8:37 /mi

Average Pace

9:53 /mi

Slowest Pace

13:12 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:56:09

45% of race

Time at Steady Pace

1:23:04

32% of race

Time at Slower Pace

59:41

23% of race

Average Pace: 9:52 /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 mi11:17:4626:458:3726:45
8:37
#18309
10K
6.21 mi11:44:4753:468:3927:01
8:42
#18827
15K
9.32 mi12:12:081:21:078:4227:21
8:48
#19068
20K
12.43 mi12:40:481:49:478:5028:40
9:14
#19514
Half
13.11 mi12:47:101:56:098:526:22
9:20
#19660
25K
15.53 mi13:11:272:20:269:0224:17
10:01
#20327
30K
18.64 mi13:43:312:52:309:1532:04
10:19
#20649
20M
20.00 mi13:59:243:08:239:2515:53
11:41
#21033
21M
21.00 mi14:12:363:21:359:3613:12
13:12
#21345
35K
21.75 mi14:20:293:29:289:387:53
10:32
#21399
23M
23.00 mi14:36:033:45:029:4715:34
12:26
#21702
24M
24.00 mi14:47:093:56:089:5011:06
11:06
#21798
40K
24.85 mi14:56:044:05:039:528:55
10:26
#21759
25.2M
25.20 mi15:00:004:08:599:533:56
11:24
#21744
Finish
26.22 mi15:09:554:18:549:539:55
9:44
#21726
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi183096750675019550(Top 73%)7416(Top 65%)7416(Top 408%)
10K6.21 mi3.10 mi18827-5187028-2787028-27819428(Top 73%)7338(Top 64%)7338(Top 404%)
15K9.32 mi3.11 mi19068-2417176-1487176-14819550(Top 73%)7416(Top 65%)7416(Top 408%)
20K12.43 mi3.11 mi19514-4467437-2617437-26120698(Top 78%)8061(Top 71%)8061(Top 444%)
Half13.11 mi0.68 mi19660-1467518-817518-8121653(Top 81%)8605(Top 75%)8605(Top 474%)
25K15.53 mi2.42 mi20327-6677890-3727890-37222245(Top 84%)8968(Top 79%)8968(Top 494%)
30K18.64 mi3.11 mi20649-3228081-1918081-19121828(Top 82%)8805(Top 77%)8805(Top 485%)
20M20.00 mi1.36 mi21033-3848315-2348315-23423803(Top 89%)9966(Top 87%)9966(Top 548%)
21M21.00 mi1.00 mi21345-3128499-1848499-18424300(Top 91%)10245(Top 90%)10245(Top 564%)
35K21.75 mi0.75 mi21399-548533-348533-3422463(Top 84%)9301(Top 81%)9301(Top 512%)
23M23.00 mi1.25 mi21702-3038715-1828715-18224514(Top 92%)10394(Top 91%)10394(Top 572%)
24M24.00 mi1.00 mi21798-968773-588773-5823235(Top 87%)9755(Top 85%)9755(Top 537%)
40K24.85 mi0.85 mi21759+398769+48769+421054(Top 79%)8643(Top 76%)8643(Top 476%)
25.2M25.20 mi0.35 mi21744+158769876921382(Top 80%)8801(Top 77%)8801(Top 484%)
Finish26.22 mi1.02 mi21726+188753+168753+1620926(Top 79%)8518(Top 75%)8518(Top 469%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 73%
×21story building
+97ft-345ft

Overall

19550

Females

7416

F45-49

7416

5K→10K

3.1 - 6.2 mi

Top 73%
×5story building
+79ft-138ft

Overall

19428

Females

7338

F45-49

7338

10K→15K

6.2 - 9.3 mi

Top 73%
×3story building
+67ft-78ft

Overall

19550

Females

7416

F45-49

7416

15K→20K

9.3 - 12.4 mi

Top 78%
×5story building
+106ft-86ft

Overall

20698

Females

8061

F45-49

8061

20K→Half

12.4 - 13.1 mi

Top 81%
×2story building
+19ft-37ft

Overall

21653

Females

8605

F45-49

8605

Half→25K

13.1 - 15.5 mi

Top 84%
×4story building
+66ft-88ft

Overall

22245

Females

8968

F45-49

8968

25K→30K

15.5 - 18.6 mi

Top 82%
×9story building
+181ft-148ft

Overall

21828

Females

8805

F45-49

8805

30K→20M

18.6 - 20.0 mi

Top 89%
×5story building
+64ft-50ft

Overall

23803

Females

9966

F45-49

9966

20M→21M

20.0 - 21.0 mi

Top 91%
×8story building
+106ft-24ft

Overall

24300

Females

10245

F45-49

10245

21M→35K

21.0 - 21.8 mi

Top 84%
×7story building
+17ft-86ft

Overall

22463

Females

9301

F45-49

9301

35K→23M

21.8 - 23.0 mi

Top 92%
×5story building
+23ft-63ft

Overall

24514

Females

10394

F45-49

10394

23M→24M

23.0 - 24.0 mi

Top 87%
×6story building
+12ft-82ft

Overall

23235

Females

9755

F45-49

9755

24M→40K

24.0 - 24.9 mi

Top 79%
×1story
+6ft-20ft

Overall

21054

Females

8643

F45-49

8643

40K→25.2M

24.9 - 25.2 mi

Top 80%
×1story
+13ft-16ft

Overall

21382

Females

8801

F45-49

8801

25.2M→Finish

25.2 - 26.2 mi

Top 79%
×2story building
+22ft-21ft

Overall

20926

Females

8518

F45-49

8518

Passing Analysis

Category:
Athletes Passed
575
Passed By
3992
Net Change
-3417
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18309
5K → 10K135653-518#18309#18827
10K → 15K101342-241#18827#19068
15K → 20K64510-446#19068#19514
20K → Half4150-146#19514#19660
Half → 25K19686-667#19660#20327
25K → 30K64386-322#20327#20649
30K → 20M14398-384#20649#21033
20M → 21M8320-312#21033#21345
21M → 35K1670-54#21345#21399
35K → 23M15318-303#21399#21702
23M → 24M12108-96#21702#21798
24M → 40K5819+39#21798#21759
40K → 25.2M249+15#21759#21744
25.2M → Finish4123+18#21744#21726
TOTALS5753992-3417
📊

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