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BOSTON MARATHON 2023

Youngjoo Choi

Bib: 31611•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 36%
Gender (Female)
#0 / 11423
Top 17%
Masters (Masters Women)
#0 / 6539
Top 7%
Division (F40-44)
#0 / 1878
Top 14%
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
8:03/mi
25:00
↑ 97↓ 3451.5%
10K· 6.21 mi
7:11/mi
47:19
↑ 79↓ 1380.4%
15K· 9.32 mi
7:21/mi
1:10:08
↑ 67↓ 78
20K· 12.43 mi
7:35/mi
1:33:43
↑ 106↓ 860.1%
Half· 13.11 mi
7:29/mi
1:38:49
↑ 19↓ 370.5%
25K· 15.53 mi
7:43/mi
1:57:31
↑ 66↓ 880.2%
30K· 18.64 mi
8:23/mi
2:23:33
↑ 181↓ 1480.2%
20M
7:50/mi
2:34:12
↑ 64↓ 500.2%
21M
8:04/mi
2:42:16
↑ 106↓ 241.6%
35K· 21.75 mi
7:33/mi
2:47:55
↑ 17↓ 861.7%
23M
7:48/mi
2:57:41
↑ 23↓ 630.6%
24M
7:21/mi
3:05:02
↓ 821.3%
40K· 24.85 mi
7:20/mi
3:11:18
↓ 200.3%
25.2M
8:04/mi
3:14:05
↑ 13↓ 160.2%
Finish· 26.22 mi
7:09/mi
3:21:22
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:49
Pace7:32 /mi
2nd Half
Distance13.11 mi
Time1:42:33
Pace7:49 /mi
📊Positive Split: 3.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:44:4425:008:0325:00
8:03
-
10K
6.21 mi12:07:0347:197:3722:19
7:11
-0:52
15K
9.32 mi12:29:521:10:087:3122:49
7:21
+0:10
20K
12.43 mi12:53:271:33:437:3223:35
7:35
+0:14
Half
13.11 mi12:58:331:38:497:325:06
7:29
-0:06
25K
15.53 mi13:17:151:57:317:3418:42
7:43
+0:14
30K
18.64 mi13:43:172:23:337:4226:02
8:23
+0:40
20M
20.00 mi13:53:562:34:127:4310:39
7:50
-0:33
21M
21.00 mi14:02:002:42:167:448:04
8:04
+0:14
35K
21.75 mi14:07:392:47:557:435:39
7:33
-0:31
23M
23.00 mi14:17:252:57:417:449:46
7:48
+0:15
24M
24.00 mi14:24:463:05:027:437:21
7:21
-0:27
40K
24.85 mi14:31:023:11:187:426:16
7:20
-0:01
25.2M
25.20 mi14:33:493:14:057:422:47
8:04
+0:44
Finish
26.22 mi14:41:063:21:227:417:17
7:09
-0:55

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

7:09 /mi

Average Pace

7:41 /mi

Slowest Pace

8:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:19:29

69% of race

Time at Steady Pace

1:01:53

31% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:41 /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 mi11:44:4425:008:0325:00
8:03
#14340
10K
6.21 mi12:07:0347:197:3722:19
7:11
#11055
15K
9.32 mi12:29:521:10:087:3122:49
7:21
#10281
20K
12.43 mi12:53:271:33:437:3223:35
7:35
#10206
Half
13.11 mi12:58:331:38:497:325:06
7:29
#10180
25K
15.53 mi13:17:151:57:317:3418:42
7:43
#10186
30K
18.64 mi13:43:172:23:337:4226:02
8:23
#10784
20M
20.00 mi13:53:562:34:127:4310:39
7:50
#10632
21M
21.00 mi14:02:002:42:167:448:04
8:04
#10445
35K
21.75 mi14:07:392:47:557:435:39
7:33
#10364
23M
23.00 mi14:17:252:57:417:449:46
7:48
#10222
24M
24.00 mi14:24:463:05:027:437:21
7:21
#10025
40K
24.85 mi14:31:023:11:187:426:16
7:20
#9810
25.2M
25.20 mi14:33:493:14:057:422:47
8:04
#9736
Finish
26.22 mi14:41:063:21:227:417:17
7:09
#9551
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi14340422742278907(Top 33%)1416(Top 12%)1416(Top 75%)
10K6.21 mi3.10 mi11055+32852354+18732354+18737993(Top 30%)1052(Top 9%)1052(Top 56%)
15K9.32 mi3.11 mi10281+7741948+4061948+4068907(Top 33%)1416(Top 12%)1416(Top 75%)
20K12.43 mi3.11 mi10206+751929+191929+1910028(Top 38%)1925(Top 17%)1925(Top 103%)
Half13.11 mi0.68 mi10180+261925+41925+410087(Top 38%)1923(Top 17%)1923(Top 102%)
25K15.53 mi2.42 mi10186-61943-181943-1810398(Top 39%)2175(Top 19%)2175(Top 116%)
30K18.64 mi3.11 mi10784-5982288-3452288-34513555(Top 51%)4058(Top 36%)4058(Top 216%)
20M20.00 mi1.36 mi10632+1522245+432245+439165(Top 34%)1868(Top 16%)1868(Top 99%)
21M21.00 mi1.00 mi10445+1872178+672178+677834(Top 29%)1449(Top 13%)1449(Top 77%)
35K21.75 mi0.75 mi10364+812147+312147+318960(Top 34%)1897(Top 17%)1897(Top 101%)
23M23.00 mi1.25 mi10222+1422106+412106+418447(Top 32%)1774(Top 16%)1774(Top 94%)
24M24.00 mi1.00 mi10025+1972047+592047+596772(Top 25%)1194(Top 10%)1194(Top 64%)
40K24.85 mi0.85 mi9810+2151974+731974+735686(Top 21%)876(Top 8%)876(Top 47%)
25.2M25.20 mi0.35 mi9736+741945+291945+297008(Top 26%)1431(Top 13%)1431(Top 76%)
Finish26.22 mi1.02 mi9551+1851890+551890+556132(Top 23%)1114(Top 10%)1114(Top 59%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 33%
×21story building
+97ft-345ft

Overall

8907

Females

1416

F40-44

1416

5K→10K

3.1 - 6.2 mi

Top 30%
×5story building
+79ft-138ft

Overall

7993

Females

1052

F40-44

1052

10K→15K

6.2 - 9.3 mi

Top 33%
×3story building
+67ft-78ft

Overall

8907

Females

1416

F40-44

1416

15K→20K

9.3 - 12.4 mi

Top 38%
×5story building
+106ft-86ft

Overall

10028

Females

1925

F40-44

1925

20K→Half

12.4 - 13.1 mi

Top 38%
×2story building
+19ft-37ft

Overall

10087

Females

1923

F40-44

1923

Half→25K

13.1 - 15.5 mi

Top 39%
×4story building
+66ft-88ft

Overall

10398

Females

2175

F40-44

2175

25K→30K

15.5 - 18.6 mi

Top 51%
×9story building
+181ft-148ft

Overall

13555

Females

4058

F40-44

4058

30K→20M

18.6 - 20.0 mi

Top 34%
×5story building
+64ft-50ft

Overall

9165

Females

1868

F40-44

1868

20M→21M

20.0 - 21.0 mi

Top 29%
×8story building
+106ft-24ft

Overall

7834

Females

1449

F40-44

1449

21M→35K

21.0 - 21.8 mi

Top 34%
×7story building
+17ft-86ft

Overall

8960

Females

1897

F40-44

1897

35K→23M

21.8 - 23.0 mi

Top 32%
×5story building
+23ft-63ft

Overall

8447

Females

1774

F40-44

1774

23M→24M

23.0 - 24.0 mi

Top 25%
×6story building
+12ft-82ft

Overall

6772

Females

1194

F40-44

1194

24M→40K

24.0 - 24.9 mi

Top 21%
×1story
+6ft-20ft

Overall

5686

Females

876

F40-44

876

40K→25.2M

24.9 - 25.2 mi

Top 26%
×1story
+13ft-16ft

Overall

7008

Females

1431

F40-44

1431

25.2M→Finish

25.2 - 26.2 mi

Top 23%
×2story building
+22ft-21ft

Overall

6132

Females

1114

F40-44

1114

Passing Analysis

Category:
Athletes Passed
5815*
Passed By
1026
Net Change
+4789
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14340
5K → 10K32883+3285#14340#11055
10K → 15K79218+774#11055#10281
15K → 20K193*118+75#10281#10206
20K → Half4721+26#10206#10180
Half → 25K132138-6#10180#10186
25K → 30K48646-598#10186#10784
30K → 20M174*22+152#10784#10632
20M → 21M1958+187#10632#10445
21M → 35K909+81#10445#10364
35K → 23M16119+142#10364#10222
23M → 24M2036+197#10222#10025
24M → 40K218*3+215#10025#9810
40K → 25.2M773+74#9810#9736
25.2M → Finish197*12+185#9736#9551
TOTALS5815*1026+4789

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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