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BOSTON MARATHON 2023

Marilyn Vargas Castillo

Bib: 18484•F

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 48%
Gender (Female)
#0 / 11423
Top 32%
Division (F18-39)
#0 / 4884
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:32
Rank: #13219
Start → 5K
24:32 | 7:54/mi
10K· 6.21 mi
48:15
Rank: #12416 (+803)
5K → 10K
23:43 | 7:38/mi
15K· 9.32 mi
1:12:17
Rank: #12269 (+147)
10K → 15K
24:02 | 7:44/mi
20K· 12.43 mi
1:37:21
Rank: #12704 (-435)
15K → 20K
25:04 | 8:04/mi
Half· 13.11 mi
1:42:47
Rank: #12784 (-80)
20K → Half
5:26 | 7:58/mi
25K· 15.53 mi
2:02:29
Rank: #12918 (-134)
Half → 25K
19:42 | 8:08/mi
30K· 18.64 mi
2:28:33
Rank: #13058 (-140)
25K → 30K
26:04 | 8:23/mi
20M
2:40:01
Rank: #13064 (-6)
30K → 20M
11:28 | 8:26/mi
21M
2:49:13
Rank: #13118 (-54)
20M → 21M
9:12 | 9:12/mi
35K· 21.75 mi
2:55:13
Rank: #13066 (+52)
21M → 35K
6:00 | 8:01/mi
23M
3:05:31
Rank: #12946 (+120)
35K → 23M
10:18 | 8:14/mi
24M
3:13:27
Rank: #12853 (+93)
23M → 24M
7:56 | 7:56/mi
40K· 24.85 mi
3:20:33
Rank: #12812 (+41)
24M → 40K
7:06 | 8:18/mi
25.2M
3:23:46
Rank: #12832 (-20)
40K → 25.2M
3:13 | 9:20/mi
Finish· 26.22 mi
3:32:24
Rank: #12907 (-75)
25.2M → Finish
8:38 | 8:28/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:42:47
Pace7:50 /mi
2nd Half
Distance13.11 mi
Time1:49:37
Pace8:22 /mi
📊Positive Split: 6.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:5924:327:5424:32
7:54
-
10K
6.21 mi11:39:4248:157:4623:43
7:38
-0:16
15K
9.32 mi12:03:441:12:177:4524:02
7:44
+0:06
20K
12.43 mi12:28:481:37:217:5025:04
8:04
+0:20
Half
13.11 mi12:34:141:42:477:505:26
7:58
-0:06
25K
15.53 mi12:53:562:02:297:5319:42
8:08
+0:10
30K
18.64 mi13:20:002:28:337:5826:04
8:23
+0:15
20M
20.00 mi13:31:282:40:018:0011:28
8:26
+0:03
21M
21.00 mi13:40:402:49:138:039:12
9:12
+0:46
35K
21.75 mi13:46:402:55:138:036:00
8:01
-1:11
23M
23.00 mi13:56:583:05:318:0410:18
8:14
+0:13
24M
24.00 mi14:04:543:13:278:047:56
7:56
-0:18
40K
24.85 mi14:12:003:20:338:047:06
8:18
+0:22
25.2M
25.20 mi14:15:133:23:468:053:13
9:20
+1:02
Finish
26.22 mi14:23:513:32:248:068:38
8:28
-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

7:38 /mi

Average Pace

8:06 /mi

Slowest Pace

9:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:12:17

34% of race

Time at Steady Pace

1:21:32

38% of race

Time at Slower Pace

58:35

28% of race

Average Pace: 8:06 /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 mi11:15:5924:327:5424:32
7:54
#13219
10K
6.21 mi11:39:4248:157:4623:43
7:38
#12416
15K
9.32 mi12:03:441:12:177:4524:02
7:44
#12269
20K
12.43 mi12:28:481:37:217:5025:04
8:04
#12704
Half
13.11 mi12:34:141:42:477:505:26
7:58
#12784
25K
15.53 mi12:53:562:02:297:5319:42
8:08
#12918
30K
18.64 mi13:20:002:28:337:5826:04
8:23
#13058
20M
20.00 mi13:31:282:40:018:0011:28
8:26
#13064
21M
21.00 mi13:40:402:49:138:039:12
9:12
#13118
35K
21.75 mi13:46:402:55:138:036:00
8:01
#13066
23M
23.00 mi13:56:583:05:318:0410:18
8:14
#12946
24M
24.00 mi14:04:543:13:278:047:56
7:56
#12853
40K
24.85 mi14:12:003:20:338:047:06
8:18
#12812
25.2M
25.20 mi14:15:133:23:468:053:13
9:20
#12832
Finish
26.22 mi14:23:513:32:248:068:38
8:28
#12907
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi132193563356312182(Top 46%)3004(Top 26%)3004(Top 62%)
10K6.21 mi3.10 mi12416+8033112+4513112+45111654(Top 44%)2679(Top 23%)2679(Top 55%)
15K9.32 mi3.11 mi12269+1473042+703042+7012182(Top 46%)3004(Top 26%)3004(Top 62%)
20K12.43 mi3.11 mi12704-4353310-2683310-26813997(Top 53%)4104(Top 36%)4104(Top 84%)
Half13.11 mi0.68 mi12784-803356-463356-4614091(Top 53%)4122(Top 36%)4122(Top 84%)
25K15.53 mi2.42 mi12918-1343460-1043460-10413685(Top 51%)4020(Top 35%)4020(Top 82%)
30K18.64 mi3.11 mi13058-1403586-1263586-12613632(Top 51%)4107(Top 36%)4107(Top 84%)
20M20.00 mi1.36 mi13064-63601-153601-1513261(Top 50%)3993(Top 35%)3993(Top 82%)
21M21.00 mi1.00 mi13118-543648-473648-4714490(Top 54%)4753(Top 42%)4753(Top 97%)
35K21.75 mi0.75 mi13066+523636+123636+1212317(Top 46%)3608(Top 32%)3608(Top 74%)
23M23.00 mi1.25 mi12946+1203596+403596+4011401(Top 43%)3216(Top 28%)3216(Top 66%)
24M24.00 mi1.00 mi12853+933561+353561+3510814(Top 41%)2993(Top 26%)2993(Top 61%)
40K24.85 mi0.85 mi12812+413560+13560+112105(Top 45%)3730(Top 33%)3730(Top 76%)
25.2M25.20 mi0.35 mi12832-203576-163576-1614345(Top 54%)4915(Top 43%)4915(Top 101%)
Finish26.22 mi1.02 mi12907-753647-713647-7115240(Top 57%)5383(Top 47%)5383(Top 110%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 46%
×21stories
+97ft-345ft

Overall

12182

Females

3004

F18-39

3004

5K→10K

3.1 - 6.2 mi

Top 44%
×5stories
+79ft-138ft

Overall

11654

Females

2679

F18-39

2679

10K→15K

6.2 - 9.3 mi

Top 46%
×3stories
+67ft-78ft

Overall

12182

Females

3004

F18-39

3004

15K→20K

9.3 - 12.4 mi

Top 53%
×5stories
+106ft-86ft

Overall

13997

Females

4104

F18-39

4104

20K→Half

12.4 - 13.1 mi

Top 53%
×2stories
+19ft-37ft

Overall

14091

Females

4122

F18-39

4122

Half→25K

13.1 - 15.5 mi

Top 51%
×4stories
+66ft-88ft

Overall

13685

Females

4020

F18-39

4020

25K→30K

15.5 - 18.6 mi

Top 51%
×9stories
+181ft-148ft

Overall

13632

Females

4107

F18-39

4107

30K→20M

18.6 - 20.0 mi

Top 50%
×5stories
+64ft-50ft

Overall

13261

Females

3993

F18-39

3993

20M→21M

20.0 - 21.0 mi

Top 54%
×8stories
+106ft-24ft

Overall

14490

Females

4753

F18-39

4753

21M→35K

21.0 - 21.8 mi

Top 46%
×7stories
+17ft-86ft

Overall

12317

Females

3608

F18-39

3608

35K→23M

21.8 - 23.0 mi

Top 43%
×5stories
+23ft-63ft

Overall

11401

Females

3216

F18-39

3216

23M→24M

23.0 - 24.0 mi

Top 41%
×6stories
+12ft-82ft

Overall

10814

Females

2993

F18-39

2993

24M→40K

24.0 - 24.9 mi

Top 45%
×1story
+6ft-20ft

Overall

12105

Females

3730

F18-39

3730

40K→25.2M

24.9 - 25.2 mi

Top 54%
×1story
+13ft-16ft

Overall

14345

Females

4915

F18-39

4915

25.2M→Finish

25.2 - 26.2 mi

Top 57%
×2stories
+22ft-21ft

Overall

15240

Females

5383

F18-39

5383

Passing Analysis

Category:
Athletes Passed
2137
Passed By
1825
Net Change
+312
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13219
5K → 10K89794+803#13219#12416
10K → 15K258111+147#12416#12269
15K → 20K68503-435#12269#12704
20K → Half1797-80#12704#12784
Half → 25K103237-134#12784#12918
25K → 30K145285-140#12918#13058
30K → 20M8288-6#13058#13064
20M → 21M77131-54#13064#13118
21M → 35K8230+52#13118#13066
35K → 23M15232+120#13066#12946
23M → 24M12229+93#12946#12853
24M → 40K7635+41#12853#12812
40K → 25.2M2040-20#12812#12832
25.2M → Finish38113-75#12832#12907
TOTALS21371825+312
📊

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