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BOSTON MARATHON 2023

Shelby Lee

Bib: 5342•F

CO

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 18%
Gender (Female)
#0 / 11423
Top 3%
Division (F18-39)
#0 / 4884
Top 6%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:06
Rank: #4623
Start → 5K
21:06 | 6:47/mi
10K· 6.21 mi
42:10
Rank: #4857 (-234)
5K → 10K
21:04 | 6:47/mi
15K· 9.32 mi
1:03:16
Rank: #4888 (-31)
10K → 15K
21:06 | 6:47/mi
20K· 12.43 mi
1:24:21
Rank: #4718 (+170)
15K → 20K
21:05 | 6:47/mi
Half· 13.11 mi
1:28:55
Rank: #4687 (+31)
20K → Half
4:34 | 6:42/mi
25K· 15.53 mi
1:45:29
Rank: #4606 (+81)
Half → 25K
16:34 | 6:50/mi
30K· 18.64 mi
2:07:44
Rank: #4777 (-171)
25K → 30K
22:15 | 7:10/mi
20M
2:17:30
Rank: #4793 (-16)
30K → 20M
9:46 | 7:11/mi
21M
2:25:03
Rank: #4788 (+5)
20M → 21M
7:33 | 7:33/mi
35K· 21.75 mi
2:30:17
Rank: #4794 (-6)
21M → 35K
5:14 | 7:00/mi
23M
2:40:01
Rank: #4963 (-169)
35K → 23M
9:44 | 7:46/mi
24M
2:46:55
Rank: #4888 (+75)
23M → 24M
6:54 | 6:54/mi
40K· 24.85 mi
2:53:00
Rank: #4846 (+42)
24M → 40K
6:05 | 7:07/mi
25.2M
2:55:37
Rank: #4823 (+23)
40K → 25.2M
2:37 | 7:35/mi
Finish· 26.22 mi
3:02:30
Rank: #4726 (+97)
25.2M → Finish
6:53 | 6:45/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:28:55
Pace6:47 /mi
2nd Half
Distance13.11 mi
Time1:33:35
Pace7:08 /mi
📊Positive Split: 5.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:5921:066:4721:06
6:47
-
10K
6.21 mi10:45:0342:106:4721:04
6:47
0:00
15K
9.32 mi11:06:091:03:166:4721:06
6:47
0:00
20K
12.43 mi11:27:141:24:216:4721:05
6:47
0:00
Half
13.11 mi11:31:481:28:556:474:34
6:42
-0:05
25K
15.53 mi11:48:221:45:296:4716:34
6:50
+0:08
30K
18.64 mi12:10:372:07:446:5122:15
7:10
+0:20
20M
20.00 mi12:20:232:17:306:529:46
7:11
+0:01
21M
21.00 mi12:27:562:25:036:547:33
7:33
+0:22
35K
21.75 mi12:33:102:30:176:555:14
7:00
-0:33
23M
23.00 mi12:42:542:40:016:579:44
7:46
+0:46
24M
24.00 mi12:49:482:46:556:576:54
6:54
-0:52
40K
24.85 mi12:55:532:53:006:586:05
7:07
+0:13
25.2M
25.20 mi12:58:302:55:376:582:37
7:35
+0:28
Finish
26.22 mi13:05:233:02:306:586:53
6:45
-0:50

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

6:42 /mi

Average Pace

6:58 /mi

Slowest Pace

7:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:42:36

89% of race

Time at Steady Pace

19:54

11% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:58 /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 mi10:23:5921:066:4721:06
6:47
#4623
10K
6.21 mi10:45:0342:106:4721:04
6:47
#4857
15K
9.32 mi11:06:091:03:166:4721:06
6:47
#4888
20K
12.43 mi11:27:141:24:216:4721:05
6:47
#4718
Half
13.11 mi11:31:481:28:556:474:34
6:42
#4687
25K
15.53 mi11:48:221:45:296:4716:34
6:50
#4606
30K
18.64 mi12:10:372:07:446:5122:15
7:10
#4777
20M
20.00 mi12:20:232:17:306:529:46
7:11
#4793
21M
21.00 mi12:27:562:25:036:547:33
7:33
#4788
35K
21.75 mi12:33:102:30:176:555:14
7:00
#4794
23M
23.00 mi12:42:542:40:016:579:44
7:46
#4963
24M
24.00 mi12:49:482:46:556:576:54
6:54
#4888
40K
24.85 mi12:55:532:53:006:586:05
7:07
#4846
25.2M
25.20 mi12:58:302:55:376:582:37
7:35
#4823
Finish
26.22 mi13:05:233:02:306:586:53
6:45
#4726
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi46233113115053(Top 19%)362(Top 3%)362(Top 7%)
10K6.21 mi3.10 mi4857-234337-26337-265119(Top 19%)379(Top 3%)379(Top 8%)
15K9.32 mi3.11 mi4888-313373375053(Top 19%)362(Top 3%)362(Top 7%)
20K12.43 mi3.11 mi4718+170310+27310+274341(Top 16%)284(Top 2%)284(Top 6%)
Half13.11 mi0.68 mi4687+31311-1311-14386(Top 16%)295(Top 3%)295(Top 6%)
25K15.53 mi2.42 mi4606+81302+9302+94467(Top 17%)304(Top 3%)304(Top 6%)
30K18.64 mi3.11 mi4777-171326-24326-245285(Top 20%)456(Top 4%)456(Top 9%)
20M20.00 mi1.36 mi4793-16330-4330-45064(Top 19%)466(Top 4%)466(Top 10%)
21M21.00 mi1.00 mi4788+5334-4334-44846(Top 18%)473(Top 4%)473(Top 10%)
35K21.75 mi0.75 mi4794-6336-2336-25346(Top 20%)572(Top 5%)572(Top 12%)
23M23.00 mi1.25 mi4963-169373-37373-378240(Top 31%)1678(Top 15%)1678(Top 34%)
24M24.00 mi1.00 mi4888+75364+9364+94198(Top 16%)374(Top 3%)374(Top 8%)
40K24.85 mi0.85 mi4846+42368-4368-44471(Top 17%)498(Top 4%)498(Top 10%)
25.2M25.20 mi0.35 mi4823+23369-1369-14378(Top 16%)533(Top 5%)533(Top 11%)
Finish26.22 mi1.02 mi4726+97359+10359+103841(Top 14%)432(Top 4%)432(Top 9%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 19%
×21stories
+97ft-345ft

Overall

5053

Females

362

F18-39

362

5K→10K

3.1 - 6.2 mi

Top 19%
×5stories
+79ft-138ft

Overall

5119

Females

379

F18-39

379

10K→15K

6.2 - 9.3 mi

Top 19%
×3stories
+67ft-78ft

Overall

5053

Females

362

F18-39

362

15K→20K

9.3 - 12.4 mi

Top 16%
×5stories
+106ft-86ft

Overall

4341

Females

284

F18-39

284

20K→Half

12.4 - 13.1 mi

Top 16%
×2stories
+19ft-37ft

Overall

4386

Females

295

F18-39

295

Half→25K

13.1 - 15.5 mi

Top 17%
×4stories
+66ft-88ft

Overall

4467

Females

304

F18-39

304

25K→30K

15.5 - 18.6 mi

Top 20%
×9stories
+181ft-148ft

Overall

5285

Females

456

F18-39

456

30K→20M

18.6 - 20.0 mi

Top 19%
×5stories
+64ft-50ft

Overall

5064

Females

466

F18-39

466

20M→21M

20.0 - 21.0 mi

Top 18%
×8stories
+106ft-24ft

Overall

4846

Females

473

F18-39

473

21M→35K

21.0 - 21.8 mi

Top 20%
×7stories
+17ft-86ft

Overall

5346

Females

572

F18-39

572

35K→23M

21.8 - 23.0 mi

Top 31%
×5stories
+23ft-63ft

Overall

8240

Females

1678

F18-39

1678

23M→24M

23.0 - 24.0 mi

Top 16%
×6stories
+12ft-82ft

Overall

4198

Females

374

F18-39

374

24M→40K

24.0 - 24.9 mi

Top 17%
×1story
+6ft-20ft

Overall

4471

Females

498

F18-39

498

40K→25.2M

24.9 - 25.2 mi

Top 16%
×1story
+13ft-16ft

Overall

4378

Females

533

F18-39

533

25.2M→Finish

25.2 - 26.2 mi

Top 14%
×2stories
+22ft-21ft

Overall

3841

Females

432

F18-39

432

Passing Analysis

Category:
Athletes Passed
1188
Passed By
1291
Net Change
-103
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4623
5K → 10K115349-234#4623#4857
10K → 15K101132-31#4857#4888
15K → 20K21040+170#4888#4718
20K → Half398+31#4718#4687
Half → 25K14160+81#4687#4606
25K → 30K85256-171#4606#4777
30K → 20M6278-16#4777#4793
20M → 21M5853+5#4793#4788
21M → 35K4147-6#4788#4794
35K → 23M42211-169#4794#4963
23M → 24M8914+75#4963#4888
24M → 40K6422+42#4888#4846
40K → 25.2M3411+23#4846#4823
25.2M → Finish10710+97#4823#4726
TOTALS11881291-103
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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