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BOSTON MARATHON 2023

Laura Castro

Bib: 17751•F

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 31%
Gender (Female)
#0 / 11423
Top 12%
Division (F18-39)
#0 / 4884
Top 22%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:38
Rank: #10601
Start → 5K
23:38 | 7:36/mi
10K· 6.21 mi
46:35
Rank: #9997 (+604)
5K → 10K
22:57 | 7:23/mi
15K· 9.32 mi
1:09:27
Rank: #9627 (+370)
10K → 15K
22:52 | 7:22/mi
20K· 12.43 mi
1:32:44
Rank: #9509 (+118)
15K → 20K
23:17 | 7:30/mi
Half· 13.11 mi
1:37:48
Rank: #9514 (-5)
20K → Half
5:04 | 7:26/mi
25K· 15.53 mi
1:55:58
Rank: #9356 (+158)
Half → 25K
18:10 | 7:30/mi
30K· 18.64 mi
2:19:20
Rank: #8966 (+390)
25K → 30K
23:22 | 7:31/mi
20M
2:29:37
Rank: #8799 (+167)
30K → 20M
10:17 | 7:34/mi
21M
2:37:34
Rank: #8673 (+126)
20M → 21M
7:57 | 7:57/mi
35K· 21.75 mi
2:43:12
Rank: #8667 (+6)
21M → 35K
5:38 | 7:32/mi
23M
2:52:48
Rank: #8564 (+103)
35K → 23M
9:36 | 7:40/mi
24M
3:00:13
Rank: #8467 (+97)
23M → 24M
7:25 | 7:25/mi
40K· 24.85 mi
3:06:47
Rank: #8428 (+39)
24M → 40K
6:34 | 7:41/mi
25.2M
3:09:34
Rank: #8383 (+45)
40K → 25.2M
2:47 | 8:04/mi
Finish· 26.22 mi
3:16:54
Rank: #8267 (+116)
25.2M → Finish
7:20 | 7:12/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:37:48
Pace7:28 /mi
2nd Half
Distance13.11 mi
Time1:39:06
Pace7:34 /mi
📊Positive Split: 1.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:3523:387:3623:38
7:36
-
10K
6.21 mi11:41:3246:357:3022:57
7:23
-0:13
15K
9.32 mi12:04:241:09:277:2722:52
7:22
-0:01
20K
12.43 mi12:27:411:32:447:2823:17
7:30
+0:08
Half
13.11 mi12:32:451:37:487:285:04
7:26
-0:04
25K
15.53 mi12:50:551:55:587:2818:10
7:30
+0:04
30K
18.64 mi13:14:172:19:207:2823:22
7:31
+0:01
20M
20.00 mi13:24:342:29:377:2910:17
7:34
+0:03
21M
21.00 mi13:32:312:37:347:307:57
7:57
+0:23
35K
21.75 mi13:38:092:43:127:305:38
7:32
-0:25
23M
23.00 mi13:47:452:52:487:319:36
7:40
+0:08
24M
24.00 mi13:55:103:00:137:317:25
7:25
-0:15
40K
24.85 mi14:01:443:06:477:316:34
7:41
+0:16
25.2M
25.20 mi14:04:313:09:347:312:47
8:04
+0:23
Finish
26.22 mi14:11:513:16:547:317:20
7:12
-0:52

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

7:12 /mi

Average Pace

7:31 /mi

Slowest Pace

8:04 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:06:10

95% of race

Time at Steady Pace

10:44

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:31 /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 mi11:18:3523:387:3623:38
7:36
#10601
10K
6.21 mi11:41:3246:357:3022:57
7:23
#9997
15K
9.32 mi12:04:241:09:277:2722:52
7:22
#9627
20K
12.43 mi12:27:411:32:447:2823:17
7:30
#9509
Half
13.11 mi12:32:451:37:487:285:04
7:26
#9514
25K
15.53 mi12:50:551:55:587:2818:10
7:30
#9356
30K
18.64 mi13:14:172:19:207:2823:22
7:31
#8966
20M
20.00 mi13:24:342:29:377:2910:17
7:34
#8799
21M
21.00 mi13:32:312:37:347:307:57
7:57
#8673
35K
21.75 mi13:38:092:43:127:305:38
7:32
#8667
23M
23.00 mi13:47:452:52:487:319:36
7:40
#8564
24M
24.00 mi13:55:103:00:137:317:25
7:25
#8467
40K
24.85 mi14:01:443:06:477:316:34
7:41
#8428
25.2M
25.20 mi14:04:313:09:347:312:47
8:04
#8383
Finish
26.22 mi14:11:513:16:547:317:20
7:12
#8267
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi10601213421349026(Top 34%)1458(Top 13%)1458(Top 30%)
10K6.21 mi3.10 mi9997+6041837+2971837+2979507(Top 36%)1624(Top 14%)1624(Top 33%)
15K9.32 mi3.11 mi9627+3701673+1641673+1649026(Top 34%)1458(Top 13%)1458(Top 30%)
20K12.43 mi3.11 mi9509+1181631+421631+429276(Top 35%)1588(Top 14%)1588(Top 33%)
Half13.11 mi0.68 mi9514-51635-41635-49645(Top 36%)1716(Top 15%)1716(Top 35%)
25K15.53 mi2.42 mi9356+1581586+491586+498748(Top 33%)1449(Top 13%)1449(Top 30%)
30K18.64 mi3.11 mi8966+3901469+1171469+1177377(Top 28%)1063(Top 9%)1063(Top 22%)
20M20.00 mi1.36 mi8799+1671425+441425+447303(Top 27%)1141(Top 10%)1141(Top 23%)
21M21.00 mi1.00 mi8673+1261401+241401+247065(Top 27%)1160(Top 10%)1160(Top 24%)
35K21.75 mi0.75 mi8667+61411-101411-108758(Top 33%)1791(Top 16%)1791(Top 37%)
23M23.00 mi1.25 mi8564+1031396+151396+157569(Top 28%)1402(Top 12%)1402(Top 29%)
24M24.00 mi1.00 mi8467+971380+161380+167190(Top 27%)1360(Top 12%)1360(Top 28%)
40K24.85 mi0.85 mi8428+391384-41384-47864(Top 30%)1694(Top 15%)1694(Top 35%)
25.2M25.20 mi0.35 mi8383+451380+41380+46974(Top 26%)1397(Top 12%)1397(Top 29%)
Finish26.22 mi1.02 mi8267+1161360+201360+206432(Top 24%)1210(Top 11%)1210(Top 25%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 34%
×21stories
+97ft-345ft

Overall

9026

Females

1458

F18-39

1458

5K→10K

3.1 - 6.2 mi

Top 36%
×5stories
+79ft-138ft

Overall

9507

Females

1624

F18-39

1624

10K→15K

6.2 - 9.3 mi

Top 34%
×3stories
+67ft-78ft

Overall

9026

Females

1458

F18-39

1458

15K→20K

9.3 - 12.4 mi

Top 35%
×5stories
+106ft-86ft

Overall

9276

Females

1588

F18-39

1588

20K→Half

12.4 - 13.1 mi

Top 36%
×2stories
+19ft-37ft

Overall

9645

Females

1716

F18-39

1716

Half→25K

13.1 - 15.5 mi

Top 33%
×4stories
+66ft-88ft

Overall

8748

Females

1449

F18-39

1449

25K→30K

15.5 - 18.6 mi

Top 28%
×9stories
+181ft-148ft

Overall

7377

Females

1063

F18-39

1063

30K→20M

18.6 - 20.0 mi

Top 27%
×5stories
+64ft-50ft

Overall

7303

Females

1141

F18-39

1141

20M→21M

20.0 - 21.0 mi

Top 27%
×8stories
+106ft-24ft

Overall

7065

Females

1160

F18-39

1160

21M→35K

21.0 - 21.8 mi

Top 33%
×7stories
+17ft-86ft

Overall

8758

Females

1791

F18-39

1791

35K→23M

21.8 - 23.0 mi

Top 28%
×5stories
+23ft-63ft

Overall

7569

Females

1402

F18-39

1402

23M→24M

23.0 - 24.0 mi

Top 27%
×6stories
+12ft-82ft

Overall

7190

Females

1360

F18-39

1360

24M→40K

24.0 - 24.9 mi

Top 30%
×1story
+6ft-20ft

Overall

7864

Females

1694

F18-39

1694

40K→25.2M

24.9 - 25.2 mi

Top 26%
×1story
+13ft-16ft

Overall

6974

Females

1397

F18-39

1397

25.2M→Finish

25.2 - 26.2 mi

Top 24%
×2stories
+22ft-21ft

Overall

6432

Females

1210

F18-39

1210

Passing Analysis

Category:
Athletes Passed
2828*
Passed By
494
Net Change
+2334
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10601
5K → 10K694*90+604#10601#9997
10K → 15K42353+370#9997#9627
15K → 20K19678+118#9627#9509
20K → Half2328-5#9509#9514
Half → 25K19941+158#9514#9356
25K → 30K413*23+390#9356#8966
30K → 20M1769+167#8966#8799
20M → 21M14923+126#8799#8673
21M → 35K4741+6#8673#8667
35K → 23M13027+103#8667#8564
23M → 24M11821+97#8564#8467
24M → 40K7435+39#8467#8428
40K → 25.2M538+45#8428#8383
25.2M → Finish13317+116#8383#8267
TOTALS2828*494+2334

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

📊

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