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BOSTON MARATHON 2023

Sebastián Castro

Bib: 1295•M

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 13%
Gender (Male)
#0 / 15176
Top 22%
Division (M18-39)
#0 / 5285
Top 46%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:18
Rank: #7350
Start → 5K
22:18 | 7:11/mi
10K· 6.21 mi
43:45
Rank: #6735 (+615)
5K → 10K
21:27 | 6:54/mi
15K· 9.32 mi
1:05:01
Rank: #6349 (+386)
10K → 15K
21:16 | 6:51/mi
20K· 12.43 mi
1:26:21
Rank: #6030 (+319)
15K → 20K
21:20 | 6:52/mi
Half· 13.11 mi
1:31:01
Rank: #6011 (+19)
20K → Half
4:40 | 6:50/mi
25K· 15.53 mi
1:47:36
Rank: #5747 (+264)
Half → 25K
16:35 | 6:50/mi
30K· 18.64 mi
2:09:07
Rank: #5373 (+374)
25K → 30K
21:31 | 6:56/mi
20M
2:18:18
Rank: #5100 (+273)
30K → 20M
9:11 | 6:45/mi
21M
2:25:19
Rank: #4874 (+226)
20M → 21M
7:01 | 7:01/mi
35K· 21.75 mi
2:30:02
Rank: #4707 (+167)
21M → 35K
4:43 | 6:18/mi
23M
2:38:09
Rank: #4407 (+300)
35K → 23M
8:07 | 6:29/mi
24M
2:44:20
Rank: #4149 (+258)
23M → 24M
6:11 | 6:11/mi
40K· 24.85 mi
2:49:41
Rank: #3907 (+242)
24M → 40K
5:21 | 6:15/mi
25.2M
2:52:01
Rank: #3806 (+101)
40K → 25.2M
2:20 | 6:46/mi
Finish· 26.22 mi
2:58:18
Rank: #3585 (+221)
25.2M → Finish
6:17 | 6:10/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:31:01
Pace6:57 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:27:17
Pace6:39 /mi
📊Negative Split: 4.1% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:25:2322:187:1122:18
7:11
-
10K
6.21 mi10:46:5043:457:0221:27
6:54
-0:17
15K
9.32 mi11:08:061:05:016:5921:16
6:51
-0:03
20K
12.43 mi11:29:261:26:216:5721:20
6:52
+0:01
Half
13.11 mi11:34:061:31:016:574:40
6:50
-0:02
25K
15.53 mi11:50:411:47:366:5616:35
6:50
0:00
30K
18.64 mi12:12:122:09:076:5621:31
6:56
+0:06
20M
20.00 mi12:21:232:18:186:559:11
6:45
-0:11
21M
21.00 mi12:28:242:25:196:557:01
7:01
+0:16
35K
21.75 mi12:33:072:30:026:544:43
6:18
-0:43
23M
23.00 mi12:41:142:38:096:538:07
6:29
+0:11
24M
24.00 mi12:47:252:44:206:516:11
6:11
-0:18
40K
24.85 mi12:52:462:49:416:505:21
6:15
+0:04
25.2M
25.20 mi12:55:062:52:016:502:20
6:46
+0:31
Finish
26.22 mi13:01:232:58:186:486:17
6:10
-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

6:10 /mi

Average Pace

6:48 /mi

Slowest Pace

7:11 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

42:10

24% of race

Time at Steady Pace

2:16:08

76% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:48 /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 mi10:25:2322:187:1122:18
7:11
#7350
10K
6.21 mi10:46:5043:457:0221:27
6:54
#6735
15K
9.32 mi11:08:061:05:016:5921:16
6:51
#6349
20K
12.43 mi11:29:261:26:216:5721:20
6:52
#6030
Half
13.11 mi11:34:061:31:016:574:40
6:50
#6011
25K
15.53 mi11:50:411:47:366:5616:35
6:50
#5747
30K
18.64 mi12:12:122:09:076:5621:31
6:56
#5373
20M
20.00 mi12:21:232:18:186:559:11
6:45
#5100
21M
21.00 mi12:28:242:25:196:557:01
7:01
#4874
35K
21.75 mi12:33:072:30:026:544:43
6:18
#4707
23M
23.00 mi12:41:142:38:096:538:07
6:29
#4407
24M
24.00 mi12:47:252:44:206:516:11
6:11
#4149
40K
24.85 mi12:52:462:49:416:505:21
6:15
#3907
25.2M
25.20 mi12:55:062:52:016:502:20
6:46
#3806
Finish
26.22 mi13:01:232:58:186:486:17
6:10
#3585
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi7350653765375498(Top 21%)5061(Top 33%)5061(Top 96%)
10K6.21 mi3.10 mi6735+6156065+4726065+4726143(Top 23%)5569(Top 37%)5569(Top 105%)
15K9.32 mi3.11 mi6349+3865746+3195746+3195498(Top 21%)5061(Top 33%)5061(Top 96%)
20K12.43 mi3.11 mi6030+3195500+2465500+2465042(Top 19%)4665(Top 31%)4665(Top 88%)
Half13.11 mi0.68 mi6011+195484+165484+165500(Top 21%)5060(Top 33%)5060(Top 96%)
25K15.53 mi2.42 mi5747+2645279+2055279+2054471(Top 17%)4163(Top 27%)4163(Top 79%)
30K18.64 mi3.11 mi5373+3744956+3234956+3233822(Top 14%)3581(Top 24%)3581(Top 68%)
20M20.00 mi1.36 mi5100+2734723+2334723+2332587(Top 10%)2454(Top 16%)2454(Top 46%)
21M21.00 mi1.00 mi4874+2264527+1964527+1962236(Top 8%)2114(Top 14%)2114(Top 40%)
35K21.75 mi0.75 mi4707+1674380+1474380+1471624(Top 6%)1544(Top 10%)1544(Top 29%)
23M23.00 mi1.25 mi4407+3004115+2654115+2651378(Top 5%)1307(Top 9%)1307(Top 25%)
24M24.00 mi1.00 mi4149+2583885+2303885+230993(Top 4%)942(Top 6%)942(Top 18%)
40K24.85 mi0.85 mi3907+2423659+2263659+226803(Top 3%)762(Top 5%)762(Top 14%)
25.2M25.20 mi0.35 mi3806+1013577+823577+821112(Top 4%)1059(Top 7%)1059(Top 20%)
Finish26.22 mi1.02 mi3585+2213373+2043373+2041186(Top 4%)1130(Top 7%)1130(Top 21%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 21%
×21stories
+97ft-345ft

Overall

5498

Males

5061

M18-39

5061

5K→10K

3.1 - 6.2 mi

Top 23%
×5stories
+79ft-138ft

Overall

6143

Males

5569

M18-39

5569

10K→15K

6.2 - 9.3 mi

Top 21%
×3stories
+67ft-78ft

Overall

5498

Males

5061

M18-39

5061

15K→20K

9.3 - 12.4 mi

Top 19%
×5stories
+106ft-86ft

Overall

5042

Males

4665

M18-39

4665

20K→Half

12.4 - 13.1 mi

Top 21%
×2stories
+19ft-37ft

Overall

5500

Males

5060

M18-39

5060

Half→25K

13.1 - 15.5 mi

Top 17%
×4stories
+66ft-88ft

Overall

4471

Males

4163

M18-39

4163

25K→30K

15.5 - 18.6 mi

Top 14%
×9stories
+181ft-148ft

Overall

3822

Males

3581

M18-39

3581

30K→20M

18.6 - 20.0 mi

Top 10%
×5stories
+64ft-50ft

Overall

2587

Males

2454

M18-39

2454

20M→21M

20.0 - 21.0 mi

Top 8%
×8stories
+106ft-24ft

Overall

2236

Males

2114

M18-39

2114

21M→35K

21.0 - 21.8 mi

Top 6%
×7stories
+17ft-86ft

Overall

1624

Males

1544

M18-39

1544

35K→23M

21.8 - 23.0 mi

Top 5%
×5stories
+23ft-63ft

Overall

1378

Males

1307

M18-39

1307

23M→24M

23.0 - 24.0 mi

Top 4%
×6stories
+12ft-82ft

Overall

993

Males

942

M18-39

942

24M→40K

24.0 - 24.9 mi

Top 3%
×1story
+6ft-20ft

Overall

803

Males

762

M18-39

762

40K→25.2M

24.9 - 25.2 mi

Top 4%
×1story
+13ft-16ft

Overall

1112

Males

1059

M18-39

1059

25.2M→Finish

25.2 - 26.2 mi

Top 4%
×2stories
+22ft-21ft

Overall

1186

Males

1130

M18-39

1130

Passing Analysis

Category:
Athletes Passed
3846
Passed By
81
Net Change
+3765
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7350
5K → 10K64833+615#7350#6735
10K → 15K39913+386#6735#6349
15K → 20K3234+319#6349#6030
20K → Half3112+19#6030#6011
Half → 25K2684+264#6011#5747
25K → 30K3828+374#5747#5373
30K → 20M2763+273#5373#5100
20M → 21M2271+226#5100#4874
21M → 35K1670+167#4874#4707
35K → 23M3000+300#4707#4407
23M → 24M2591+258#4407#4149
24M → 40K2420+242#4149#3907
40K → 25.2M1021+101#3907#3806
25.2M → Finish2221+221#3806#3585
TOTALS384681+3765
📊

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