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BOSTON MARATHON 2023

Shelby Adair

Bib: 11282•F

SC

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 21%
Gender (Female)
#0 / 11423
Top 5%
Division (F18-39)
#0 / 4884
Top 9%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:16
Rank: #7315
Start → 5K
22:16 | 7:10/mi
10K· 6.21 mi
44:37
Rank: #7639 (-324)
5K → 10K
22:21 | 7:12/mi
15K· 9.32 mi
1:06:58
Rank: #7655 (-16)
10K → 15K
22:21 | 7:12/mi
20K· 12.43 mi
1:29:13
Rank: #7400 (+255)
15K → 20K
22:15 | 7:10/mi
Half· 13.11 mi
1:34:06
Rank: #7400
20K → Half
4:53 | 7:09/mi
25K· 15.53 mi
1:51:30
Rank: #7244 (+156)
Half → 25K
17:24 | 7:11/mi
30K· 18.64 mi
2:13:42
Rank: #6829 (+415)
25K → 30K
22:12 | 7:09/mi
20M
2:23:21
Rank: #6635 (+194)
30K → 20M
9:39 | 7:06/mi
21M
2:30:38
Rank: #6410 (+225)
20M → 21M
7:17 | 7:17/mi
35K· 21.75 mi
2:35:47
Rank: #6330 (+80)
21M → 35K
5:09 | 6:53/mi
23M
2:44:38
Rank: #6152 (+178)
35K → 23M
8:51 | 7:04/mi
24M
2:51:30
Rank: #6001 (+151)
23M → 24M
6:52 | 6:52/mi
40K· 24.85 mi
2:57:30
Rank: #5878 (+123)
24M → 40K
6:00 | 7:01/mi
25.2M
3:00:04
Rank: #5832 (+46)
40K → 25.2M
2:34 | 7:27/mi
Finish· 26.22 mi
3:07:03
Rank: #5715 (+117)
25.2M → Finish
6:59 | 6:51/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:34:06
Pace7:11 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:32:57
Pace7:05 /mi
📊Negative Split: 1.2% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:0222:167:1022:16
7:10
-
10K
6.21 mi11:11:2344:377:1122:21
7:12
+0:02
15K
9.32 mi11:33:441:06:587:1122:21
7:12
0:00
20K
12.43 mi11:55:591:29:137:1122:15
7:10
-0:02
Half
13.11 mi12:00:521:34:067:114:53
7:09
-0:01
25K
15.53 mi12:18:161:51:307:1117:24
7:11
+0:02
30K
18.64 mi12:40:282:13:427:1022:12
7:09
-0:02
20M
20.00 mi12:50:072:23:217:109:39
7:06
-0:03
21M
21.00 mi12:57:242:30:387:107:17
7:17
+0:11
35K
21.75 mi13:02:332:35:477:105:09
6:53
-0:24
23M
23.00 mi13:11:242:44:387:098:51
7:04
+0:11
24M
24.00 mi13:18:162:51:307:096:52
6:52
-0:12
40K
24.85 mi13:24:162:57:307:086:00
7:01
+0:09
25.2M
25.20 mi13:26:503:00:047:092:34
7:27
+0:26
Finish
26.22 mi13:33:493:07:037:086:59
6:51
-0:36

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

6:51 /mi

Average Pace

7:08 /mi

Slowest Pace

7:27 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:12:30

71% of race

Time at Steady Pace

54:33

29% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:08 /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 mi10:49:0222:167:1022:16
7:10
#7315
10K
6.21 mi11:11:2344:377:1122:21
7:12
#7639
15K
9.32 mi11:33:441:06:587:1122:21
7:12
#7655
20K
12.43 mi11:55:591:29:137:1122:15
7:10
#7400
Half
13.11 mi12:00:521:34:067:114:53
7:09
#7400
25K
15.53 mi12:18:161:51:307:1117:24
7:11
#7244
30K
18.64 mi12:40:282:13:427:1022:12
7:09
#6829
20M
20.00 mi12:50:072:23:217:109:39
7:06
#6635
21M
21.00 mi12:57:242:30:387:107:17
7:17
#6410
35K
21.75 mi13:02:332:35:477:105:09
6:53
#6330
23M
23.00 mi13:11:242:44:387:098:51
7:04
#6152
24M
24.00 mi13:18:162:51:307:096:52
6:52
#6001
40K
24.85 mi13:24:162:57:307:086:00
7:01
#5878
25.2M
25.20 mi13:26:503:00:047:092:34
7:27
#5832
Finish
26.22 mi13:33:493:07:037:086:59
6:51
#5715
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi73157937937763(Top 29%)991(Top 9%)991(Top 20%)
10K6.21 mi3.10 mi7639-324896-103896-1038056(Top 30%)1060(Top 9%)1060(Top 22%)
15K9.32 mi3.11 mi7655-16916-20916-207763(Top 29%)991(Top 9%)991(Top 20%)
20K12.43 mi3.11 mi7400+255851+65851+656876(Top 26%)749(Top 7%)749(Top 15%)
Half13.11 mi0.68 mi7400852-1852-17592(Top 29%)935(Top 8%)935(Top 19%)
25K15.53 mi2.42 mi7244+156820+32820+326550(Top 25%)709(Top 6%)709(Top 15%)
30K18.64 mi3.11 mi6829+415733+87733+875206(Top 20%)444(Top 4%)444(Top 9%)
20M20.00 mi1.36 mi6635+194703+30703+304653(Top 17%)387(Top 3%)387(Top 8%)
21M21.00 mi1.00 mi6410+225653+50653+503555(Top 13%)252(Top 2%)252(Top 5%)
35K21.75 mi0.75 mi6330+80636+17636+174732(Top 18%)449(Top 4%)449(Top 9%)
23M23.00 mi1.25 mi6152+178605+31605+314166(Top 16%)350(Top 3%)350(Top 7%)
24M24.00 mi1.00 mi6001+151587+18587+184047(Top 15%)358(Top 3%)358(Top 7%)
40K24.85 mi0.85 mi5878+123568+19568+193968(Top 15%)406(Top 4%)406(Top 8%)
25.2M25.20 mi0.35 mi5832+46562+6562+63708(Top 14%)386(Top 3%)386(Top 8%)
Finish26.22 mi1.02 mi5715+117549+13549+134391(Top 16%)548(Top 5%)548(Top 11%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 29%
×21stories
+97ft-345ft

Overall

7763

Females

991

F18-39

991

5K→10K

3.1 - 6.2 mi

Top 30%
×5stories
+79ft-138ft

Overall

8056

Females

1060

F18-39

1060

10K→15K

6.2 - 9.3 mi

Top 29%
×3stories
+67ft-78ft

Overall

7763

Females

991

F18-39

991

15K→20K

9.3 - 12.4 mi

Top 26%
×5stories
+106ft-86ft

Overall

6876

Females

749

F18-39

749

20K→Half

12.4 - 13.1 mi

Top 29%
×2stories
+19ft-37ft

Overall

7592

Females

935

F18-39

935

Half→25K

13.1 - 15.5 mi

Top 25%
×4stories
+66ft-88ft

Overall

6550

Females

709

F18-39

709

25K→30K

15.5 - 18.6 mi

Top 20%
×9stories
+181ft-148ft

Overall

5206

Females

444

F18-39

444

30K→20M

18.6 - 20.0 mi

Top 17%
×5stories
+64ft-50ft

Overall

4653

Females

387

F18-39

387

20M→21M

20.0 - 21.0 mi

Top 13%
×8stories
+106ft-24ft

Overall

3555

Females

252

F18-39

252

21M→35K

21.0 - 21.8 mi

Top 18%
×7stories
+17ft-86ft

Overall

4732

Females

449

F18-39

449

35K→23M

21.8 - 23.0 mi

Top 16%
×5stories
+23ft-63ft

Overall

4166

Females

350

F18-39

350

23M→24M

23.0 - 24.0 mi

Top 15%
×6stories
+12ft-82ft

Overall

4047

Females

358

F18-39

358

24M→40K

24.0 - 24.9 mi

Top 15%
×1story
+6ft-20ft

Overall

3968

Females

406

F18-39

406

40K→25.2M

24.9 - 25.2 mi

Top 14%
×1story
+13ft-16ft

Overall

3708

Females

386

F18-39

386

25.2M→Finish

25.2 - 26.2 mi

Top 16%
×2stories
+22ft-21ft

Overall

4391

Females

548

F18-39

548

Passing Analysis

Category:
Athletes Passed
2285
Passed By
685
Net Change
+1600
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7315
5K → 10K108432-324#7315#7639
10K → 15K126142-16#7639#7655
15K → 20K28126+255#7655#7400
20K → Half25250#7400#7400
Half → 25K17519+156#7400#7244
25K → 30K4227+415#7244#6829
30K → 20M1984+194#6829#6635
20M → 21M2250+225#6635#6410
21M → 35K855+80#6410#6330
35K → 23M1846+178#6330#6152
23M → 24M1510+151#6152#6001
24M → 40K1285+123#6001#5878
40K → 25.2M471+46#5878#5832
25.2M → Finish13013+117#5832#5715
TOTALS2285685+1600
📊

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