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BOSTON MARATHON 2023

Kyeong Ja Lee

Bib: 31732•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F50-54)
#0 / 1207
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
32:49
Rank: #24859
Start → 5K
32:49 | 10:34/mi
10K· 6.21 mi
1:06:44
Rank: #25151 (-292)
5K → 10K
33:55 | 10:55/mi
15K· 9.32 mi
1:37:08
Rank: #24482 (+669)
10K → 15K
30:24 | 9:47/mi
20K· 12.43 mi
2:08:02
Rank: #24022 (+460)
15K → 20K
30:54 | 9:57/mi
Half· 13.11 mi
2:15:49
Rank: #24128 (-106)
20K → Half
7:47 | 11:24/mi
25K· 15.53 mi
2:39:32
Rank: #23722 (+406)
Half → 25K
23:43 | 9:47/mi
30K· 18.64 mi
3:09:03
Rank: #23133 (+589)
25K → 30K
29:31 | 9:30/mi
20M
3:22:03
Rank: #22866 (+267)
30K → 20M
13:00 | 9:34/mi
21M
3:32:09
Rank: #22668 (+198)
20M → 21M
10:06 | 10:06/mi
35K· 21.75 mi
3:39:06
Rank: #22546 (+122)
21M → 35K
6:57 | 9:17/mi
23M
3:51:28
Rank: #22396 (+150)
35K → 23M
12:22 | 9:53/mi
24M
4:00:43
Rank: #22260 (+136)
23M → 24M
9:15 | 9:15/mi
40K· 24.85 mi
4:08:51
Rank: #22134 (+126)
24M → 40K
8:08 | 9:31/mi
25.2M
4:12:23
Rank: #22082 (+52)
40K → 25.2M
3:32 | 10:15/mi
Finish· 26.22 mi
4:21:56
Rank: #22007 (+75)
25.2M → Finish
9:33 | 9:22/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time2:15:49
Pace10:22 /mi
2nd Half✓ Faster
Distance13.11 mi
Time2:06:07
Pace9:37 /mi
📊Negative Split: 7.1% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:53:1532:4910:3432:49
10:34
-
10K
6.21 mi12:27:101:06:4410:4433:55
10:55
+0:21
15K
9.32 mi12:57:341:37:0810:2530:24
9:47
-1:08
20K
12.43 mi13:28:282:08:0210:1830:54
9:57
+0:10
Half
13.11 mi13:36:152:15:4910:227:47
11:24
+1:27
25K
15.53 mi13:59:582:39:3210:1623:43
9:47
-1:37
30K
18.64 mi14:29:293:09:0310:0829:31
9:30
-0:17
20M
20.00 mi14:42:293:22:0310:0613:00
9:34
+0:04
21M
21.00 mi14:52:353:32:0910:0610:06
10:06
+0:32
35K
21.75 mi14:59:323:39:0610:046:57
9:17
-0:49
23M
23.00 mi15:11:543:51:2810:0412:22
9:53
+0:36
24M
24.00 mi15:21:094:00:4310:029:15
9:15
-0:38
40K
24.85 mi15:29:174:08:5110:018:08
9:31
+0:16
25.2M
25.20 mi15:32:494:12:2310:013:32
10:15
+0:44
Finish
26.22 mi15:42:224:21:5610:009:33
9:22
-0:53

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

9:15 /mi

Average Pace

10:00 /mi

Slowest Pace

11:24 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

25:45

10% of race

Time at Steady Pace

2:28:02

57% of race

Time at Slower Pace

1:28:09

34% of race

Average Pace: 9:59 /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 mi11:53:1532:4910:3432:49
10:34
#24859
10K
6.21 mi12:27:101:06:4410:4433:55
10:55
#25151
15K
9.32 mi12:57:341:37:0810:2530:24
9:47
#24482
20K
12.43 mi13:28:282:08:0210:1830:54
9:57
#24022
Half
13.11 mi13:36:152:15:4910:227:47
11:24
#24128
25K
15.53 mi13:59:582:39:3210:1623:43
9:47
#23722
30K
18.64 mi14:29:293:09:0310:0829:31
9:30
#23133
20M
20.00 mi14:42:293:22:0310:0613:00
9:34
#22866
21M
21.00 mi14:52:353:32:0910:0610:06
10:06
#22668
35K
21.75 mi14:59:323:39:0610:046:57
9:17
#22546
23M
23.00 mi15:11:543:51:2810:0412:22
9:53
#22396
24M
24.00 mi15:21:094:00:4310:029:15
9:15
#22260
40K
24.85 mi15:29:174:08:5110:018:08
9:31
#22134
25.2M
25.20 mi15:32:494:12:2310:013:32
10:15
#22082
Finish
26.22 mi15:42:224:21:5610:009:33
9:22
#22007
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi24859103611036123016(Top 86%)9352(Top 82%)9352(Top 775%)
10K6.21 mi3.10 mi25151-29210519-15810519-15825363(Top 95%)10644(Top 93%)10644(Top 882%)
15K9.32 mi3.11 mi24482+66910152+36710152+36723016(Top 86%)9352(Top 82%)9352(Top 775%)
20K12.43 mi3.11 mi24022+4609905+2479905+24722769(Top 86%)9227(Top 81%)9227(Top 764%)
Half13.11 mi0.68 mi24128-1069969-649969-6425395(Top 95%)10722(Top 94%)10722(Top 888%)
25K15.53 mi2.42 mi23722+4069748+2219748+22121694(Top 81%)8669(Top 76%)8669(Top 718%)
30K18.64 mi3.11 mi23133+5899454+2949454+29419451(Top 73%)7445(Top 65%)7445(Top 617%)
20M20.00 mi1.36 mi22866+2679328+1269328+12619130(Top 72%)7371(Top 65%)7371(Top 611%)
21M21.00 mi1.00 mi22668+1989236+929236+9218418(Top 69%)7016(Top 61%)7016(Top 581%)
35K21.75 mi0.75 mi22546+1229166+709166+7019160(Top 72%)7490(Top 66%)7490(Top 621%)
23M23.00 mi1.25 mi22396+1509093+739093+7319657(Top 74%)7772(Top 68%)7772(Top 644%)
24M24.00 mi1.00 mi22260+1369024+699024+6918296(Top 69%)7064(Top 62%)7064(Top 585%)
40K24.85 mi0.85 mi22134+1268961+638961+6318410(Top 69%)7170(Top 63%)7170(Top 594%)
25.2M25.20 mi0.35 mi22082+528939+228939+2218370(Top 69%)7179(Top 63%)7179(Top 595%)
Finish26.22 mi1.02 mi22007+758908+318908+3119687(Top 74%)7833(Top 69%)7833(Top 649%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 86%
×21stories
+97ft-345ft

Overall

23016

Females

9352

F50-54

9352

5K→10K

3.1 - 6.2 mi

Top 95%
×5stories
+79ft-138ft

Overall

25363

Females

10644

F50-54

10644

10K→15K

6.2 - 9.3 mi

Top 86%
×3stories
+67ft-78ft

Overall

23016

Females

9352

F50-54

9352

15K→20K

9.3 - 12.4 mi

Top 86%
×5stories
+106ft-86ft

Overall

22769

Females

9227

F50-54

9227

20K→Half

12.4 - 13.1 mi

Top 95%
×2stories
+19ft-37ft

Overall

25395

Females

10722

F50-54

10722

Half→25K

13.1 - 15.5 mi

Top 81%
×4stories
+66ft-88ft

Overall

21694

Females

8669

F50-54

8669

25K→30K

15.5 - 18.6 mi

Top 73%
×9stories
+181ft-148ft

Overall

19451

Females

7445

F50-54

7445

30K→20M

18.6 - 20.0 mi

Top 72%
×5stories
+64ft-50ft

Overall

19130

Females

7371

F50-54

7371

20M→21M

20.0 - 21.0 mi

Top 69%
×8stories
+106ft-24ft

Overall

18418

Females

7016

F50-54

7016

21M→35K

21.0 - 21.8 mi

Top 72%
×7stories
+17ft-86ft

Overall

19160

Females

7490

F50-54

7490

35K→23M

21.8 - 23.0 mi

Top 74%
×5stories
+23ft-63ft

Overall

19657

Females

7772

F50-54

7772

23M→24M

23.0 - 24.0 mi

Top 69%
×6stories
+12ft-82ft

Overall

18296

Females

7064

F50-54

7064

24M→40K

24.0 - 24.9 mi

Top 69%
×1story
+6ft-20ft

Overall

18410

Females

7170

F50-54

7170

40K→25.2M

24.9 - 25.2 mi

Top 69%
×1story
+13ft-16ft

Overall

18370

Females

7179

F50-54

7179

25.2M→Finish

25.2 - 26.2 mi

Top 74%
×2stories
+22ft-21ft

Overall

19687

Females

7833

F50-54

7833

Passing Analysis

Category:
Athletes Passed
3359
Passed By
507
Net Change
+2852
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24859
5K → 10K80372-292#24859#25151
10K → 15K6712+669#25151#24482
15K → 20K4644+460#24482#24022
20K → Half6112-106#24022#24128
Half → 25K4071+406#24128#23722
25K → 30K5890+589#23722#23133
30K → 20M2692+267#23133#22866
20M → 21M1991+198#22866#22668
21M → 35K1242+122#22668#22546
35K → 23M1511+150#22546#22396
23M → 24M1371+136#22396#22260
24M → 40K1271+126#22260#22134
40K → 25.2M531+52#22134#22082
25.2M → Finish827+75#22082#22007
TOTALS3359507+2852
📊

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