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BOSTON MARATHON 2023

Kyoung Ju Lee

Bib: 31733•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F55-59)
#0 / 815
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
32:49
Rank: #24861
Start → 5K
32:49 | 10:34/mi
10K· 6.21 mi
1:06:44
Rank: #25152 (-291)
5K → 10K
33:55 | 10:55/mi
15K· 9.32 mi
1:37:09
Rank: #24489 (+663)
10K → 15K
30:25 | 9:47/mi
20K· 12.43 mi
2:08:19
Rank: #24071 (+418)
15K → 20K
31:10 | 10:02/mi
Half· 13.11 mi
2:15:54
Rank: #24140 (-69)
20K → Half
7:35 | 11:07/mi
25K· 15.53 mi
2:40:00
Rank: #23773 (+367)
Half → 25K
24:06 | 9:56/mi
30K· 18.64 mi
3:09:25
Rank: #23170 (+603)
25K → 30K
29:25 | 9:28/mi
20M
3:24:00
Rank: #23083 (+87)
30K → 20M
14:35 | 10:44/mi
21M
3:39:01
Rank: #23361 (-278)
20M → 21M
15:01 | 15:01/mi
35K· 21.75 mi
3:47:41
Rank: #23399 (-38)
21M → 35K
8:40 | 11:35/mi
23M
4:01:37
Rank: #23357 (+42)
35K → 23M
13:56 | 11:08/mi
24M
4:11:41
Rank: #23266 (+91)
23M → 24M
10:04 | 10:04/mi
40K· 24.85 mi
4:20:27
Rank: #23163 (+103)
24M → 40K
8:46 | 10:15/mi
25.2M
4:25:20
Rank: #23220 (-57)
40K → 25.2M
4:53 | 14:10/mi
Finish· 26.22 mi
4:36:37
Rank: #23263 (-43)
25.2M → Finish
11:17 | 11:04/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:15:54
Pace10:22 /mi
2nd Half
Distance13.11 mi
Time2:20:43
Pace10:44 /mi
📊Positive Split: 3.5% slower 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 mi12:57:351:37:0910:2530:25
9:47
-1:08
20K
12.43 mi13:28:452:08:1910:2031:10
10:02
+0:15
Half
13.11 mi13:36:202:15:5410:227:35
11:07
+1:05
25K
15.53 mi14:00:262:40:0010:1824:06
9:56
-1:11
30K
18.64 mi14:29:513:09:2510:1029:25
9:28
-0:28
20M
20.00 mi14:44:263:24:0010:1214:35
10:44
+1:16
21M
21.00 mi14:59:273:39:0110:2615:01
15:01
+4:17
35K
21.75 mi15:08:073:47:4110:288:40
11:35
-3:26
23M
23.00 mi15:22:034:01:3710:3013:56
11:08
-0:27
24M
24.00 mi15:32:074:11:4110:2910:04
10:04
-1:04
40K
24.85 mi15:40:534:20:2710:298:46
10:15
+0:11
25.2M
25.20 mi15:45:464:25:2010:324:53
14:10
+3:55
Finish
26.22 mi15:57:034:36:3710:3311:17
11:04
-3:06

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

9:28 /mi

Average Pace

10:33 /mi

Slowest Pace

15:01 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:23:56

30% of race

Time at Steady Pace

2:44:07

59% of race

Time at Slower Pace

28:34

10% of race

Average Pace: 10:33 /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
#24861
10K
6.21 mi12:27:101:06:4410:4433:55
10:55
#25152
15K
9.32 mi12:57:351:37:0910:2530:25
9:47
#24489
20K
12.43 mi13:28:452:08:1910:2031:10
10:02
#24071
Half
13.11 mi13:36:202:15:5410:227:35
11:07
#24140
25K
15.53 mi14:00:262:40:0010:1824:06
9:56
#23773
30K
18.64 mi14:29:513:09:2510:1029:25
9:28
#23170
20M
20.00 mi14:44:263:24:0010:1214:35
10:44
#23083
21M
21.00 mi14:59:273:39:0110:2615:01
15:01
#23361
35K
21.75 mi15:08:073:47:4110:288:40
11:35
#23399
23M
23.00 mi15:22:034:01:3710:3013:56
11:08
#23357
24M
24.00 mi15:32:074:11:4110:2910:04
10:04
#23266
40K
24.85 mi15:40:534:20:2710:298:46
10:15
#23163
25.2M
25.20 mi15:45:464:25:2010:324:53
14:10
#23220
Finish
26.22 mi15:57:034:36:3710:3311:17
11:04
#23263
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi24861103631036323026(Top 86%)9360(Top 82%)9360(Top 1148%)
10K6.21 mi3.10 mi25152-29110520-15710520-15725364(Top 95%)10645(Top 93%)10645(Top 1306%)
15K9.32 mi3.11 mi24489+66310156+36410156+36423026(Top 86%)9360(Top 82%)9360(Top 1148%)
20K12.43 mi3.11 mi24071+4189934+2229934+22222988(Top 86%)9348(Top 82%)9348(Top 1147%)
Half13.11 mi0.68 mi24140-699976-429976-4225104(Top 94%)10548(Top 92%)10548(Top 1294%)
25K15.53 mi2.42 mi23773+3679772+2049772+20422094(Top 83%)8890(Top 78%)8890(Top 1091%)
30K18.64 mi3.11 mi23170+6039471+3019471+30119326(Top 73%)7378(Top 65%)7378(Top 905%)
20M20.00 mi1.36 mi23083+879440+319440+3122230(Top 84%)9110(Top 80%)9110(Top 1118%)
21M21.00 mi1.00 mi23361-2789591-1519591-15125733(Top 97%)10969(Top 96%)10969(Top 1346%)
35K21.75 mi0.75 mi23399-389619-289619-2824218(Top 91%)10236(Top 90%)10236(Top 1256%)
23M23.00 mi1.25 mi23357+429608+119608+1122603(Top 85%)9383(Top 82%)9383(Top 1151%)
24M24.00 mi1.00 mi23266+919561+479561+4721000(Top 79%)8551(Top 75%)8551(Top 1049%)
40K24.85 mi0.85 mi23163+1039526+359526+3520647(Top 78%)8419(Top 74%)8419(Top 1033%)
25.2M25.20 mi0.35 mi23220-579556-309556-3025120(Top 94%)10755(Top 94%)10755(Top 1320%)
Finish26.22 mi1.02 mi23263-439588-329588-3224105(Top 91%)10214(Top 89%)10214(Top 1253%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 86%
×21stories
+97ft-345ft

Overall

23026

Females

9360

F55-59

9360

5K→10K

3.1 - 6.2 mi

Top 95%
×5stories
+79ft-138ft

Overall

25364

Females

10645

F55-59

10645

10K→15K

6.2 - 9.3 mi

Top 86%
×3stories
+67ft-78ft

Overall

23026

Females

9360

F55-59

9360

15K→20K

9.3 - 12.4 mi

Top 86%
×5stories
+106ft-86ft

Overall

22988

Females

9348

F55-59

9348

20K→Half

12.4 - 13.1 mi

Top 94%
×2stories
+19ft-37ft

Overall

25104

Females

10548

F55-59

10548

Half→25K

13.1 - 15.5 mi

Top 83%
×4stories
+66ft-88ft

Overall

22094

Females

8890

F55-59

8890

25K→30K

15.5 - 18.6 mi

Top 73%
×9stories
+181ft-148ft

Overall

19326

Females

7378

F55-59

7378

30K→20M

18.6 - 20.0 mi

Top 84%
×5stories
+64ft-50ft

Overall

22230

Females

9110

F55-59

9110

20M→21M

20.0 - 21.0 mi

Top 97%
×8stories
+106ft-24ft

Overall

25733

Females

10969

F55-59

10969

21M→35K

21.0 - 21.8 mi

Top 91%
×7stories
+17ft-86ft

Overall

24218

Females

10236

F55-59

10236

35K→23M

21.8 - 23.0 mi

Top 85%
×5stories
+23ft-63ft

Overall

22603

Females

9383

F55-59

9383

23M→24M

23.0 - 24.0 mi

Top 79%
×6stories
+12ft-82ft

Overall

21000

Females

8551

F55-59

8551

24M→40K

24.0 - 24.9 mi

Top 78%
×1story
+6ft-20ft

Overall

20647

Females

8419

F55-59

8419

40K→25.2M

24.9 - 25.2 mi

Top 94%
×1story
+13ft-16ft

Overall

25120

Females

10755

F55-59

10755

25.2M→Finish

25.2 - 26.2 mi

Top 91%
×2stories
+22ft-21ft

Overall

24105

Females

10214

F55-59

10214

Passing Analysis

Category:
Athletes Passed
2568
Passed By
970
Net Change
+1598
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24861
5K → 10K80371-291#24861#25152
10K → 15K6652+663#25152#24489
15K → 20K4257+418#24489#24071
20K → Half877-69#24071#24140
Half → 25K3681+367#24140#23773
25K → 30K6030+603#23773#23170
30K → 20M10215+87#23170#23083
20M → 21M3281-278#23083#23361
21M → 35K1654-38#23361#23399
35K → 23M6826+42#23399#23357
23M → 24M954+91#23357#23266
24M → 40K1129+103#23266#23163
40K → 25.2M865-57#23163#23220
25.2M → Finish1558-43#23220#23263
TOTALS2568970+1598
📊

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