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BOSTON MARATHON 2023

Young-Sook Kwon

Bib: 21566•F

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F65-69)
#0 / 221
Top 12%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:36/mi
26:42
↑ 97↓ 3451.5%
10K· 6.21 mi
8:39/mi
53:35
↑ 79↓ 1380.4%
15K· 9.32 mi
8:50/mi
1:21:03
↑ 67↓ 78
20K· 12.43 mi
9:09/mi
1:49:29
↑ 106↓ 860.1%
Half· 13.11 mi
8:43/mi
1:55:26
↑ 19↓ 370.5%
25K· 15.53 mi
9:07/mi
2:17:33
↑ 66↓ 880.2%
30K· 18.64 mi
9:41/mi
2:47:38
↑ 181↓ 1480.2%
20M
9:31/mi
3:00:34
↑ 64↓ 500.2%
21M
10:27/mi
3:11:01
↑ 106↓ 241.6%
35K· 21.75 mi
8:51/mi
3:17:38
↑ 17↓ 861.7%
23M
9:25/mi
3:29:25
↑ 23↓ 630.6%
24M
8:50/mi
3:38:15
↓ 821.3%
40K· 24.85 mi
9:24/mi
3:46:17
↓ 200.3%
25.2M
10:18/mi
3:49:50
↑ 13↓ 160.2%
Finish· 26.22 mi
9:27/mi
3:59:28
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:55:26
Pace8:48 /mi
2nd Half
Distance13.11 mi
Time2:04:02
Pace9:28 /mi
📊Positive Split: 7.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:5326:428:3626:42
8:36
-
10K
6.21 mi11:50:4653:358:3726:53
8:39
+0:03
15K
9.32 mi12:18:141:21:038:4227:28
8:50
+0:11
20K
12.43 mi12:46:401:49:298:4928:26
9:09
+0:19
Half
13.11 mi12:52:371:55:268:485:57
8:43
-0:26
25K
15.53 mi13:14:442:17:338:5122:07
9:07
+0:24
30K
18.64 mi13:44:492:47:389:0030:05
9:41
+0:34
20M
20.00 mi13:57:453:00:349:0212:56
9:31
-0:10
21M
21.00 mi14:08:123:11:019:0610:27
10:27
+0:56
35K
21.75 mi14:14:493:17:389:056:37
8:51
-1:36
23M
23.00 mi14:26:363:29:259:0611:47
9:25
+0:34
24M
24.00 mi14:35:263:38:159:068:50
8:50
-0:35
40K
24.85 mi14:43:283:46:179:068:02
9:24
+0:34
25.2M
25.20 mi14:47:013:49:509:073:33
10:18
+0:54
Finish
26.22 mi14:56:393:59:289:089:38
9:27
-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

8:36 /mi

Average Pace

9:08 /mi

Slowest Pace

10:27 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:42:27

43% of race

Time at Steady Pace

1:10:22

29% of race

Time at Slower Pace

1:06:39

28% of race

Average Pace: 9:08 /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 mi11:23:5326:428:3626:42
8:36
#18205
10K
6.21 mi11:50:4653:358:3726:53
8:39
#18655
15K
9.32 mi12:18:141:21:038:4227:28
8:50
#19021
20K
12.43 mi12:46:401:49:298:4928:26
9:09
#19372
Half
13.11 mi12:52:371:55:268:485:57
8:43
#19349
25K
15.53 mi13:14:442:17:338:5122:07
9:07
#19378
30K
18.64 mi13:44:492:47:389:0030:05
9:41
#19562
20M
20.00 mi13:57:453:00:349:0212:56
9:31
#19495
21M
21.00 mi14:08:123:11:019:0610:27
10:27
#19497
35K
21.75 mi14:14:493:17:389:056:37
8:51
#19402
23M
23.00 mi14:26:363:29:259:0611:47
9:25
#19324
24M
24.00 mi14:35:263:38:159:068:50
8:50
#19206
40K
24.85 mi14:43:283:46:179:068:02
9:24
#19165
25.2M
25.20 mi14:47:013:49:509:073:33
10:18
#19144
Finish
26.22 mi14:56:393:59:289:089:38
9:27
#19221
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF65-69Seg. OverallSeg. FemalesSeg. F65-69
5K3.11 mi3.11 mi182056687668719745(Top 74%)7532(Top 66%)7532(Top 3408%)
10K6.21 mi3.10 mi18655-4506916-2296916-22919157(Top 72%)7178(Top 63%)7178(Top 3248%)
15K9.32 mi3.11 mi19021-3667146-2307146-23019745(Top 74%)7532(Top 66%)7532(Top 3408%)
20K12.43 mi3.11 mi19372-3517354-2087354-20820372(Top 77%)7884(Top 69%)7884(Top 3567%)
Half13.11 mi0.68 mi19349+237334+207334+2019112(Top 72%)7154(Top 63%)7154(Top 3237%)
25K15.53 mi2.42 mi19378-297346-127346-1219523(Top 73%)7437(Top 65%)7437(Top 3365%)
30K18.64 mi3.11 mi19562-1847466-1207466-12020087(Top 75%)7816(Top 68%)7816(Top 3537%)
20M20.00 mi1.36 mi19495+677450+167450+1618942(Top 71%)7268(Top 64%)7268(Top 3289%)
21M21.00 mi1.00 mi19497-27456-67456-619440(Top 73%)7603(Top 67%)7603(Top 3440%)
35K21.75 mi0.75 mi19402+957405+517405+5117228(Top 65%)6413(Top 56%)6413(Top 2902%)
23M23.00 mi1.25 mi19324+787367+387367+3817993(Top 68%)6865(Top 60%)6865(Top 3106%)
24M24.00 mi1.00 mi19206+1187308+597308+5916441(Top 62%)6061(Top 53%)6061(Top 2743%)
40K24.85 mi0.85 mi19165+417295+137295+1317964(Top 67%)6936(Top 61%)6936(Top 3138%)
25.2M25.20 mi0.35 mi19144+217287+87287+818500(Top 69%)7233(Top 63%)7233(Top 3273%)
Finish26.22 mi1.02 mi19221-777338-517338-5119966(Top 75%)7979(Top 70%)7979(Top 3610%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 74%
×21story building
+97ft-345ft

Overall

19745

Females

7532

F65-69

7532

5K→10K

3.1 - 6.2 mi

Top 72%
×5story building
+79ft-138ft

Overall

19157

Females

7178

F65-69

7178

10K→15K

6.2 - 9.3 mi

Top 74%
×3story building
+67ft-78ft

Overall

19745

Females

7532

F65-69

7532

15K→20K

9.3 - 12.4 mi

Top 77%
×5story building
+106ft-86ft

Overall

20372

Females

7884

F65-69

7884

20K→Half

12.4 - 13.1 mi

Top 72%
×2story building
+19ft-37ft

Overall

19112

Females

7154

F65-69

7154

Half→25K

13.1 - 15.5 mi

Top 73%
×4story building
+66ft-88ft

Overall

19523

Females

7437

F65-69

7437

25K→30K

15.5 - 18.6 mi

Top 75%
×9story building
+181ft-148ft

Overall

20087

Females

7816

F65-69

7816

30K→20M

18.6 - 20.0 mi

Top 71%
×5story building
+64ft-50ft

Overall

18942

Females

7268

F65-69

7268

20M→21M

20.0 - 21.0 mi

Top 73%
×8story building
+106ft-24ft

Overall

19440

Females

7603

F65-69

7603

21M→35K

21.0 - 21.8 mi

Top 65%
×7story building
+17ft-86ft

Overall

17228

Females

6413

F65-69

6413

35K→23M

21.8 - 23.0 mi

Top 68%
×5story building
+23ft-63ft

Overall

17993

Females

6865

F65-69

6865

23M→24M

23.0 - 24.0 mi

Top 62%
×6story building
+12ft-82ft

Overall

16441

Females

6061

F65-69

6061

24M→40K

24.0 - 24.9 mi

Top 67%
×1story
+6ft-20ft

Overall

17964

Females

6936

F65-69

6936

40K→25.2M

24.9 - 25.2 mi

Top 69%
×1story
+13ft-16ft

Overall

18500

Females

7233

F65-69

7233

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2story building
+22ft-21ft

Overall

19966

Females

7979

F65-69

7979

Passing Analysis

Category:
Athletes Passed
1220
Passed By
2236
Net Change
-1016
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18205
5K → 10K149599-450#18205#18655
10K → 15K70436-366#18655#19021
15K → 20K73424-351#19021#19372
20K → Half4219+23#19372#19349
Half → 25K112141-29#19349#19378
25K → 30K103287-184#19378#19562
30K → 20M11750+67#19562#19495
20M → 21M7274-2#19495#19497
21M → 35K10712+95#19497#19402
35K → 23M11032+78#19402#19324
23M → 24M13012+118#19324#19206
24M → 40K7837+41#19206#19165
40K → 25.2M3312+21#19165#19144
25.2M → Finish24101-77#19144#19221
TOTALS12202236-1016
📊

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