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BOSTON MARATHON 2023

Leah Klempner

Bib: 18509•F

KY

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 43%
Division (F18-39)
#0 / 4884
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:39
Rank: #15864
Start → 5K
8:15/mi
25:39 split
10K· 6.21 mi
50:51
Rank: #15710 (+154)
5K → 10K
8:07/mi
25:12 split
15K· 9.32 mi
1:16:13
Rank: #15652 (+58)
10K → 15K
8:10/mi
25:22 split
20K· 12.43 mi
1:42:08
Rank: #15706 (-54)
15K → 20K
8:21/mi
25:55 split
Half· 13.11 mi
1:47:40
Rank: #15676 (+30)
20K → Half
8:07/mi
5:32 split
25K· 15.53 mi
2:07:40
Rank: #15485 (+191)
Half → 25K
8:15/mi
20:00 split
30K· 18.64 mi
2:34:05
Rank: #15232 (+253)
25K → 30K
8:30/mi
26:25 split
20M
2:45:51
Rank: #15187 (+45)
30K → 20M
8:40/mi
11:46 split
21M
2:54:53
Rank: #15075 (+112)
20M → 21M
9:02/mi
9:02 split
35K· 21.75 mi
3:01:16
Rank: #15081 (-6)
21M → 35K
8:32/mi
6:23 split
23M
3:12:00
Rank: #14976 (+105)
35K → 23M
8:34/mi
10:44 split
24M
3:20:23
Rank: #14898 (+78)
23M → 24M
8:23/mi
8:23 split
40K· 24.85 mi
3:27:45
Rank: #14835 (+63)
24M → 40K
8:37/mi
7:22 split
25.2M
3:31:09
Rank: #14867 (-32)
40K → 25.2M
9:52/mi
3:24 split
Finish· 26.22 mi
3:39:58
Rank: #14941 (-74)
25.2M → Finish
8:39/mi
8:49 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:47:40
Pace8:13 /mi
2nd Half
Distance13.11 mi
Time1:52:18
Pace8:34 /mi
📊Positive Split: 4.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:5825:398:1525:39
8:15
-
10K
6.21 mi11:42:1050:518:1125:12
8:07
-0:08
15K
9.32 mi12:07:321:16:138:1125:22
8:10
+0:03
20K
12.43 mi12:33:271:42:088:1325:55
8:21
+0:11
Half
13.11 mi12:38:591:47:408:135:32
8:07
-0:14
25K
15.53 mi12:58:592:07:408:1320:00
8:15
+0:08
30K
18.64 mi13:25:242:34:058:1626:25
8:30
+0:15
20M
20.00 mi13:37:102:45:518:1811:46
8:40
+0:10
21M
21.00 mi13:46:122:54:538:209:02
9:02
+0:22
35K
21.75 mi13:52:353:01:168:206:23
8:32
-0:30
23M
23.00 mi14:03:193:12:008:2110:44
8:34
+0:02
24M
24.00 mi14:11:423:20:238:218:23
8:23
-0:11
40K
24.85 mi14:19:043:27:458:227:22
8:37
+0:14
25.2M
25.20 mi14:22:283:31:098:233:24
9:52
+1:15
Finish
26.22 mi14:31:173:39:588:248:49
8:39
-1:13

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

8:07 /mi

Average Pace

8:24 /mi

Slowest Pace

9:52 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:41:45

46% of race

Time at Steady Pace

1:45:47

48% of race

Time at Slower Pace

12:26

6% of race

Average Pace: 8:23 /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 mi11:16:5825:398:1525:39
8:15
#15864
10K
6.21 mi11:42:1050:518:1125:12
8:07
#15710
15K
9.32 mi12:07:321:16:138:1125:22
8:10
#15652
20K
12.43 mi12:33:271:42:088:1325:55
8:21
#15706
Half
13.11 mi12:38:591:47:408:135:32
8:07
#15676
25K
15.53 mi12:58:592:07:408:1320:00
8:15
#15485
30K
18.64 mi13:25:242:34:058:1626:25
8:30
#15232
20M
20.00 mi13:37:102:45:518:1811:46
8:40
#15187
21M
21.00 mi13:46:122:54:538:209:02
9:02
#15075
35K
21.75 mi13:52:353:01:168:206:23
8:32
#15081
23M
23.00 mi14:03:193:12:008:2110:44
8:34
#14976
24M
24.00 mi14:11:423:20:238:218:23
8:23
#14898
40K
24.85 mi14:19:043:27:458:227:22
8:37
#14835
25.2M
25.20 mi14:22:283:31:098:233:24
9:52
#14867
Finish
26.22 mi14:31:173:39:588:248:49
8:39
#14941
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi158645189518915623(Top 59%)5065(Top 44%)5065(Top 104%)
10K6.21 mi3.10 mi15710+1545099+905099+9015600(Top 59%)5017(Top 44%)5017(Top 103%)
15K9.32 mi3.11 mi15652+585069+305069+3015623(Top 59%)5065(Top 44%)5065(Top 104%)
20K12.43 mi3.11 mi15706-545120-515120-5115897(Top 60%)5286(Top 46%)5286(Top 108%)
Half13.11 mi0.68 mi15676+305107+135107+1315251(Top 57%)4836(Top 42%)4836(Top 99%)
25K15.53 mi2.42 mi15485+1915017+905017+9014597(Top 55%)4585(Top 40%)4585(Top 94%)
30K18.64 mi3.11 mi15232+2534902+1154902+11514345(Top 54%)4535(Top 40%)4535(Top 93%)
20M20.00 mi1.36 mi15187+454896+64896+614636(Top 55%)4788(Top 42%)4788(Top 98%)
21M21.00 mi1.00 mi15075+1124846+504846+5013630(Top 51%)4286(Top 38%)4286(Top 88%)
35K21.75 mi0.75 mi15081-64868-224868-2215495(Top 58%)5401(Top 47%)5401(Top 111%)
23M23.00 mi1.25 mi14976+1054819+494819+4913683(Top 51%)4441(Top 39%)4441(Top 91%)
24M24.00 mi1.00 mi14898+784793+264793+2613801(Top 52%)4559(Top 40%)4559(Top 93%)
40K24.85 mi0.85 mi14835+634785+84785+814077(Top 53%)4788(Top 42%)4788(Top 98%)
25.2M25.20 mi0.35 mi14867-324811-264811-2616830(Top 63%)6321(Top 55%)6321(Top 129%)
Finish26.22 mi1.02 mi14941-744875-644875-6416266(Top 61%)5973(Top 52%)5973(Top 122%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 59%
×21story building
+97ft-345ft

Overall

15623

Females

5065

F18-39

5065

5K→10K

3.1 - 6.2 mi

Top 59%
×5story building
+79ft-138ft

Overall

15600

Females

5017

F18-39

5017

10K→15K

6.2 - 9.3 mi

Top 59%
×3story building
+67ft-78ft

Overall

15623

Females

5065

F18-39

5065

15K→20K

9.3 - 12.4 mi

Top 60%
×5story building
+106ft-86ft

Overall

15897

Females

5286

F18-39

5286

20K→Half

12.4 - 13.1 mi

Top 57%
×2story building
+19ft-37ft

Overall

15251

Females

4836

F18-39

4836

Half→25K

13.1 - 15.5 mi

Top 55%
×4story building
+66ft-88ft

Overall

14597

Females

4585

F18-39

4585

25K→30K

15.5 - 18.6 mi

Top 54%
×9story building
+181ft-148ft

Overall

14345

Females

4535

F18-39

4535

30K→20M

18.6 - 20.0 mi

Top 55%
×5story building
+64ft-50ft

Overall

14636

Females

4788

F18-39

4788

20M→21M

20.0 - 21.0 mi

Top 51%
×8story building
+106ft-24ft

Overall

13630

Females

4286

F18-39

4286

21M→35K

21.0 - 21.8 mi

Top 58%
×7story building
+17ft-86ft

Overall

15495

Females

5401

F18-39

5401

35K→23M

21.8 - 23.0 mi

Top 51%
×5story building
+23ft-63ft

Overall

13683

Females

4441

F18-39

4441

23M→24M

23.0 - 24.0 mi

Top 52%
×6story building
+12ft-82ft

Overall

13801

Females

4559

F18-39

4559

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

14077

Females

4788

F18-39

4788

40K→25.2M

24.9 - 25.2 mi

Top 63%
×1story
+13ft-16ft

Overall

16830

Females

6321

F18-39

6321

25.2M→Finish

25.2 - 26.2 mi

Top 61%
×2story building
+22ft-21ft

Overall

16266

Females

5973

F18-39

5973

Passing Analysis

Category:
Athletes Passed
2022
Passed By
1099
Net Change
+923
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15864
5K → 10K379225+154#15864#15710
10K → 15K211153+58#15710#15652
15K → 20K162216-54#15652#15706
20K → Half4414+30#15706#15676
Half → 25K23039+191#15676#15485
25K → 30K31562+253#15485#15232
30K → 20M10863+45#15232#15187
20M → 21M14634+112#15187#15075
21M → 35K4248-6#15075#15081
35K → 23M13025+105#15081#14976
23M → 24M10022+78#14976#14898
24M → 40K9431+63#14898#14835
40K → 25.2M2052-32#14835#14867
25.2M → Finish41115-74#14867#14941
TOTALS20221099+923
📊

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