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BOSTON MARATHON 2023

Samantha Kempner

Bib: 14546•F

MI

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 34%
Masters (Masters Women)
#0 / 6539
Top 21%
Division (F40-44)
#0 / 1878
Top 38%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:14
Rank: #14883
Start → 5K
25:14 | 8:07/mi
10K· 6.21 mi
49:58
Rank: #14682 (+201)
5K → 10K
24:44 | 7:58/mi
15K· 9.32 mi
1:14:56
Rank: #14658 (+24)
10K → 15K
24:58 | 8:02/mi
20K· 12.43 mi
1:40:01
Rank: #14459 (+199)
15K → 20K
25:05 | 8:04/mi
Half· 13.11 mi
1:45:23
Rank: #14404 (+55)
20K → Half
5:22 | 7:52/mi
25K· 15.53 mi
2:04:58
Rank: #14243 (+161)
Half → 25K
19:35 | 8:05/mi
30K· 18.64 mi
2:30:25
Rank: #13848 (+395)
25K → 30K
25:27 | 8:11/mi
20M
2:41:34
Rank: #13659 (+189)
30K → 20M
11:09 | 8:12/mi
21M
2:50:02
Rank: #13430 (+229)
20M → 21M
8:28 | 8:29/mi
35K· 21.75 mi
2:56:23
Rank: #13495 (-65)
21M → 35K
6:21 | 8:29/mi
23M
3:07:09
Rank: #13496 (-1)
35K → 23M
10:46 | 8:36/mi
24M
3:15:36
Rank: #13503 (-7)
23M → 24M
8:27 | 8:27/mi
40K· 24.85 mi
3:23:01
Rank: #13521 (-18)
24M → 40K
7:25 | 8:40/mi
25.2M
3:26:03
Rank: #13467 (+54)
40K → 25.2M
3:02 | 8:48/mi
Finish· 26.22 mi
3:34:09
Rank: #13387 (+80)
25.2M → Finish
8:06 | 7:57/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:23
Pace8:02 /mi
2nd Half
Distance13.11 mi
Time1:48:46
Pace8:18 /mi
📊Positive Split: 3.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:3625:148:0725:14
8:07
-
10K
6.21 mi11:19:2049:588:0224:44
7:58
-0:09
15K
9.32 mi11:44:181:14:568:0224:58
8:02
+0:04
20K
12.43 mi12:09:231:40:018:0325:05
8:04
+0:02
Half
13.11 mi12:14:451:45:238:025:22
7:52
-0:12
25K
15.53 mi12:34:202:04:588:0319:35
8:05
+0:13
30K
18.64 mi12:59:472:30:258:0425:27
8:11
+0:06
20M
20.00 mi13:10:562:41:348:0511:09
8:12
+0:01
21M
21.00 mi13:19:242:50:028:068:28
8:29
+0:17
35K
21.75 mi13:25:452:56:238:076:21
8:29
0:00
23M
23.00 mi13:36:313:07:098:0810:46
8:36
+0:07
24M
24.00 mi13:44:583:15:368:098:27
8:27
-0:09
40K
24.85 mi13:52:233:23:018:107:25
8:40
+0:13
25.2M
25.20 mi13:55:253:26:038:113:02
8:48
+0:08
Finish
26.22 mi14:03:313:34:098:108:06
7:57
-0:51

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

7:52 /mi

Average Pace

8:10 /mi

Slowest Pace

8:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:23:42

95% of race

Time at Steady Pace

10:27

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:10 /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 mi10:54:3625:148:0725:14
8:07
#14883
10K
6.21 mi11:19:2049:588:0224:44
7:58
#14682
15K
9.32 mi11:44:181:14:568:0224:58
8:02
#14658
20K
12.43 mi12:09:231:40:018:0325:05
8:04
#14459
Half
13.11 mi12:14:451:45:238:025:22
7:52
#14404
25K
15.53 mi12:34:202:04:588:0319:35
8:05
#14243
30K
18.64 mi12:59:472:30:258:0425:27
8:11
#13848
20M
20.00 mi13:10:562:41:348:0511:09
8:12
#13659
21M
21.00 mi13:19:242:50:028:068:28
8:29
#13430
35K
21.75 mi13:25:452:56:238:076:21
8:29
#13495
23M
23.00 mi13:36:313:07:098:0810:46
8:36
#13496
24M
24.00 mi13:44:583:15:368:098:27
8:27
#13503
40K
24.85 mi13:52:233:23:018:107:25
8:40
#13521
25.2M
25.20 mi13:55:253:26:038:113:02
8:48
#13467
Finish
26.22 mi14:03:313:34:098:108:06
7:57
#13387
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi148834569456914699(Top 55%)4504(Top 39%)4504(Top 240%)
10K6.21 mi3.10 mi14682+2014453+1164453+11614507(Top 54%)4361(Top 38%)4361(Top 232%)
15K9.32 mi3.11 mi14658+244450+34450+314699(Top 55%)4504(Top 39%)4504(Top 240%)
20K12.43 mi3.11 mi14459+1994347+1034347+10314060(Top 53%)4142(Top 36%)4142(Top 221%)
Half13.11 mi0.68 mi14404+554316+314316+3113383(Top 50%)3732(Top 33%)3732(Top 199%)
25K15.53 mi2.42 mi14243+1614254+624254+6213357(Top 50%)3841(Top 34%)3841(Top 205%)
30K18.64 mi3.11 mi13848+3954043+2114043+21112305(Top 46%)3366(Top 29%)3366(Top 179%)
20M20.00 mi1.36 mi13659+1893951+923951+9211767(Top 44%)3152(Top 28%)3152(Top 168%)
21M21.00 mi1.00 mi13430+2293834+1173834+11710342(Top 39%)2565(Top 22%)2565(Top 137%)
35K21.75 mi0.75 mi13495-653883-493883-4915184(Top 57%)5234(Top 46%)5234(Top 279%)
23M23.00 mi1.25 mi13496-13917-343917-3413795(Top 52%)4500(Top 39%)4500(Top 240%)
24M24.00 mi1.00 mi13503-73941-243941-2414197(Top 53%)4783(Top 42%)4783(Top 255%)
40K24.85 mi0.85 mi13521-183970-293970-2914382(Top 54%)4954(Top 43%)4954(Top 264%)
25.2M25.20 mi0.35 mi13467+543955+153955+1511405(Top 43%)3417(Top 30%)3417(Top 182%)
Finish26.22 mi1.02 mi13387+803926+293926+2911773(Top 44%)3593(Top 31%)3593(Top 191%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 55%
×21stories
+97ft-345ft

Overall

14699

Females

4504

F40-44

4504

5K→10K

3.1 - 6.2 mi

Top 54%
×5stories
+79ft-138ft

Overall

14507

Females

4361

F40-44

4361

10K→15K

6.2 - 9.3 mi

Top 55%
×3stories
+67ft-78ft

Overall

14699

Females

4504

F40-44

4504

15K→20K

9.3 - 12.4 mi

Top 53%
×5stories
+106ft-86ft

Overall

14060

Females

4142

F40-44

4142

20K→Half

12.4 - 13.1 mi

Top 50%
×2stories
+19ft-37ft

Overall

13383

Females

3732

F40-44

3732

Half→25K

13.1 - 15.5 mi

Top 50%
×4stories
+66ft-88ft

Overall

13357

Females

3841

F40-44

3841

25K→30K

15.5 - 18.6 mi

Top 46%
×9stories
+181ft-148ft

Overall

12305

Females

3366

F40-44

3366

30K→20M

18.6 - 20.0 mi

Top 44%
×5stories
+64ft-50ft

Overall

11767

Females

3152

F40-44

3152

20M→21M

20.0 - 21.0 mi

Top 39%
×8stories
+106ft-24ft

Overall

10342

Females

2565

F40-44

2565

21M→35K

21.0 - 21.8 mi

Top 57%
×7stories
+17ft-86ft

Overall

15184

Females

5234

F40-44

5234

35K→23M

21.8 - 23.0 mi

Top 52%
×5stories
+23ft-63ft

Overall

13795

Females

4500

F40-44

4500

23M→24M

23.0 - 24.0 mi

Top 53%
×6stories
+12ft-82ft

Overall

14197

Females

4783

F40-44

4783

24M→40K

24.0 - 24.9 mi

Top 54%
×1story
+6ft-20ft

Overall

14382

Females

4954

F40-44

4954

40K→25.2M

24.9 - 25.2 mi

Top 43%
×1story
+13ft-16ft

Overall

11405

Females

3417

F40-44

3417

25.2M→Finish

25.2 - 26.2 mi

Top 44%
×2stories
+22ft-21ft

Overall

11773

Females

3593

F40-44

3593

Passing Analysis

Category:
Athletes Passed
2500
Passed By
1004
Net Change
+1496
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14883
5K → 10K402201+201#14883#14682
10K → 15K205181+24#14682#14658
15K → 20K29192+199#14658#14459
20K → Half7520+55#14459#14404
Half → 25K21958+161#14404#14243
25K → 30K43439+395#14243#13848
30K → 20M20617+189#13848#13659
20M → 21M2378+229#13659#13430
21M → 35K3499-65#13430#13495
35K → 23M9293-1#13495#13496
23M → 24M7481-7#13496#13503
24M → 40K5270-18#13503#13521
40K → 25.2M6511+54#13521#13467
25.2M → Finish11434+80#13467#13387
TOTALS25001004+1496
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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