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BOSTON MARATHON 2023

Shelby Singleton

Bib: 22520•F

AL

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F45-49)
#0 / 1817
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
8:52/mi
27:34
↑ 97↓ 3451.5%
10K· 6.21 mi
8:42/mi
54:35
↑ 79↓ 1380.4%
15K· 9.32 mi
8:38/mi
1:21:23
↑ 67↓ 78
20K· 12.43 mi
8:44/mi
1:48:30
↑ 106↓ 860.1%
Half· 13.11 mi
8:39/mi
1:54:24
↑ 19↓ 370.5%
25K· 15.53 mi
8:47/mi
2:15:41
↑ 66↓ 880.2%
30K· 18.64 mi
8:53/mi
2:43:17
↑ 181↓ 1480.2%
20M
9:06/mi
2:55:39
↑ 64↓ 500.2%
21M
10:34/mi
3:06:13
↑ 106↓ 241.6%
35K· 21.75 mi
8:40/mi
3:12:42
↑ 17↓ 861.7%
23M
9:03/mi
3:24:02
↑ 23↓ 630.6%
24M
8:51/mi
3:32:53
↓ 821.3%
40K· 24.85 mi
8:47/mi
3:40:24
↓ 200.3%
25.2M
9:43/mi
3:43:45
↑ 13↓ 160.2%
Finish· 26.22 mi
8:33/mi
3:52:28
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:54:24
Pace8:44 /mi
2nd Half
Distance13.11 mi
Time1:58:04
Pace9:00 /mi
📊Positive Split: 3.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:24:4127:348:5227:34
8:52
-
10K
6.21 mi11:51:4254:358:4727:01
8:42
-0:10
15K
9.32 mi12:18:301:21:238:4426:48
8:38
-0:04
20K
12.43 mi12:45:371:48:308:4427:07
8:44
+0:06
Half
13.11 mi12:51:311:54:248:445:54
8:39
-0:05
25K
15.53 mi13:12:482:15:418:4421:17
8:47
+0:08
30K
18.64 mi13:40:242:43:178:4627:36
8:53
+0:06
20M
20.00 mi13:52:462:55:398:4712:22
9:06
+0:13
21M
21.00 mi14:03:203:06:138:5210:34
10:34
+1:28
35K
21.75 mi14:09:493:12:428:526:29
8:40
-1:54
23M
23.00 mi14:21:093:24:028:5211:20
9:03
+0:23
24M
24.00 mi14:30:003:32:538:528:51
8:51
-0:12
40K
24.85 mi14:37:313:40:248:527:31
8:47
-0:04
25.2M
25.20 mi14:40:523:43:458:533:21
9:43
+0:56
Finish
26.22 mi14:49:353:52:288:528:43
8:33
-1:10

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

8:33 /mi

Average Pace

8:52 /mi

Slowest Pace

10:34 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

3:14:51

84% of race

Time at Slower Pace

37:37

16% of race

Average Pace: 8:52 /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 mi11:24:4127:348:5227:34
8:52
#19858
10K
6.21 mi11:51:4254:358:4727:01
8:42
#19604
15K
9.32 mi12:18:301:21:238:4426:48
8:38
#19218
20K
12.43 mi12:45:371:48:308:4427:07
8:44
#18962
Half
13.11 mi12:51:311:54:248:445:54
8:39
#18951
25K
15.53 mi13:12:482:15:418:4421:17
8:47
#18769
30K
18.64 mi13:40:242:43:178:4627:36
8:53
#18329
20M
20.00 mi13:52:462:55:398:4712:22
9:06
#18226
21M
21.00 mi14:03:203:06:138:5210:34
10:34
#18363
35K
21.75 mi14:09:493:12:428:526:29
8:40
#18274
23M
23.00 mi14:21:093:24:028:5211:20
9:03
#18156
24M
24.00 mi14:30:003:32:538:528:51
8:51
#18098
40K
24.85 mi14:37:313:40:248:527:31
8:47
#17995
25.2M
25.20 mi14:40:523:43:458:533:21
9:43
#17961
Finish
26.22 mi14:49:353:52:288:528:43
8:33
#17878
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi198587722772218610(Top 70%)6863(Top 60%)6863(Top 378%)
10K6.21 mi3.10 mi19604+2547533+1897533+18919411(Top 73%)7321(Top 64%)7321(Top 403%)
15K9.32 mi3.11 mi19218+3867260+2737260+27318610(Top 70%)6863(Top 60%)6863(Top 378%)
20K12.43 mi3.11 mi18962+2567099+1617099+16118299(Top 69%)6672(Top 58%)6672(Top 367%)
Half13.11 mi0.68 mi18951+117092+77092+718638(Top 70%)6852(Top 60%)6852(Top 377%)
25K15.53 mi2.42 mi18769+1826991+1016991+10117837(Top 67%)6481(Top 57%)6481(Top 357%)
30K18.64 mi3.11 mi18329+4406760+2316760+23116572(Top 62%)5826(Top 51%)5826(Top 321%)
20M20.00 mi1.36 mi18226+1036717+436717+4317083(Top 64%)6213(Top 54%)6213(Top 342%)
21M21.00 mi1.00 mi18363-1376804-876804-8719802(Top 74%)7816(Top 68%)7816(Top 430%)
35K21.75 mi0.75 mi18274+896761+436761+4316287(Top 61%)5872(Top 51%)5872(Top 323%)
23M23.00 mi1.25 mi18156+1186703+586703+5816342(Top 61%)5942(Top 52%)5942(Top 327%)
24M24.00 mi1.00 mi18098+586687+166687+1616515(Top 62%)6091(Top 53%)6091(Top 335%)
40K24.85 mi0.85 mi17995+1036637+506637+5015086(Top 57%)5355(Top 47%)5355(Top 295%)
25.2M25.20 mi0.35 mi17961+346616+216616+2116259(Top 61%)6026(Top 53%)6026(Top 332%)
Finish26.22 mi1.02 mi17878+836574+426574+4215771(Top 59%)5691(Top 50%)5691(Top 313%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21story building
+97ft-345ft

Overall

18610

Females

6863

F45-49

6863

5K→10K

3.1 - 6.2 mi

Top 73%
×5story building
+79ft-138ft

Overall

19411

Females

7321

F45-49

7321

10K→15K

6.2 - 9.3 mi

Top 70%
×3story building
+67ft-78ft

Overall

18610

Females

6863

F45-49

6863

15K→20K

9.3 - 12.4 mi

Top 69%
×5story building
+106ft-86ft

Overall

18299

Females

6672

F45-49

6672

20K→Half

12.4 - 13.1 mi

Top 70%
×2story building
+19ft-37ft

Overall

18638

Females

6852

F45-49

6852

Half→25K

13.1 - 15.5 mi

Top 67%
×4story building
+66ft-88ft

Overall

17837

Females

6481

F45-49

6481

25K→30K

15.5 - 18.6 mi

Top 62%
×9story building
+181ft-148ft

Overall

16572

Females

5826

F45-49

5826

30K→20M

18.6 - 20.0 mi

Top 64%
×5story building
+64ft-50ft

Overall

17083

Females

6213

F45-49

6213

20M→21M

20.0 - 21.0 mi

Top 74%
×8story building
+106ft-24ft

Overall

19802

Females

7816

F45-49

7816

21M→35K

21.0 - 21.8 mi

Top 61%
×7story building
+17ft-86ft

Overall

16287

Females

5872

F45-49

5872

35K→23M

21.8 - 23.0 mi

Top 61%
×5story building
+23ft-63ft

Overall

16342

Females

5942

F45-49

5942

23M→24M

23.0 - 24.0 mi

Top 62%
×6story building
+12ft-82ft

Overall

16515

Females

6091

F45-49

6091

24M→40K

24.0 - 24.9 mi

Top 57%
×1story
+6ft-20ft

Overall

15086

Females

5355

F45-49

5355

40K→25.2M

24.9 - 25.2 mi

Top 61%
×1story
+13ft-16ft

Overall

16259

Females

6026

F45-49

6026

25.2M→Finish

25.2 - 26.2 mi

Top 59%
×2story building
+22ft-21ft

Overall

15771

Females

5691

F45-49

5691

Passing Analysis

Category:
Athletes Passed
2686
Passed By
706
Net Change
+1980
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19858
5K → 10K457203+254#19858#19604
10K → 15K44155+386#19604#19218
15K → 20K30751+256#19218#18962
20K → Half4029+11#18962#18951
Half → 25K21230+182#18951#18769
25K → 30K46525+440#18769#18329
30K → 20M13431+103#18329#18226
20M → 21M51188-137#18226#18363
21M → 35K923+89#18363#18274
35K → 23M14426+118#18274#18156
23M → 24M8628+58#18156#18098
24M → 40K1129+103#18098#17995
40K → 25.2M417+34#17995#17961
25.2M → Finish10421+83#17961#17878
TOTALS2686706+1980
📊

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