Boston Marathon logo
BOSTON MARATHON 2023

Jaime Castro

Bib: 1896•M

NY

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 6%
Gender (Male)
#0 / 15176
Top 10%
Division (M18-39)
#0 / 5285
Top 22%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:28
Rank: #1314
Start → 5K
19:28 | 6:16/mi
10K· 6.21 mi
39:08
Rank: #1559 (-245)
5K → 10K
19:40 | 6:20/mi
15K· 9.32 mi
58:48
Rank: #1624 (-65)
10K → 15K
19:40 | 6:20/mi
20K· 12.43 mi
1:18:38
Rank: #1648 (-24)
15K → 20K
19:50 | 6:23/mi
Half· 13.11 mi
1:22:56
Rank: #1651 (-3)
20K → Half
4:18 | 6:18/mi
25K· 15.53 mi
1:38:27
Rank: #1652 (-1)
Half → 25K
15:31 | 6:24/mi
30K· 18.64 mi
1:58:27
Rank: #1560 (+92)
25K → 30K
20:00 | 6:26/mi
20M
2:07:24
Rank: #1561 (-1)
30K → 20M
8:57 | 6:35/mi
21M
2:14:13
Rank: #1537 (+24)
20M → 21M
6:49 | 6:49/mi
35K· 21.75 mi
2:19:04
Rank: #1552 (-15)
21M → 35K
4:51 | 6:29/mi
23M
2:27:23
Rank: #1547 (+5)
35K → 23M
8:19 | 6:39/mi
24M
2:33:54
Rank: #1558 (-11)
23M → 24M
6:31 | 6:31/mi
40K· 24.85 mi
2:39:30
Rank: #1546 (+12)
24M → 40K
5:36 | 6:33/mi
25.2M
2:41:52
Rank: #1539 (+7)
40K → 25.2M
2:22 | 6:52/mi
Finish· 26.22 mi
2:48:20
Rank: #1524 (+15)
25.2M → Finish
6:28 | 6:21/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:22:56
Pace6:20 /mi
2nd Half
Distance13.11 mi
Time1:25:24
Pace6:31 /mi
📊Positive Split: 3.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:4919:286:1619:28
6:16
-
10K
6.21 mi10:39:2939:086:1819:40
6:20
+0:04
15K
9.32 mi10:59:0958:486:1919:40
6:20
0:00
20K
12.43 mi11:18:591:18:386:2019:50
6:23
+0:03
Half
13.11 mi11:23:171:22:566:204:18
6:18
-0:05
25K
15.53 mi11:38:481:38:276:2015:31
6:24
+0:06
30K
18.64 mi11:58:481:58:276:2120:00
6:26
+0:02
20M
20.00 mi12:07:452:07:246:228:57
6:35
+0:09
21M
21.00 mi12:14:342:14:136:236:49
6:49
+0:14
35K
21.75 mi12:19:252:19:046:244:51
6:29
-0:20
23M
23.00 mi12:27:442:27:236:248:19
6:39
+0:10
24M
24.00 mi12:34:152:33:546:256:31
6:31
-0:08
40K
24.85 mi12:39:512:39:306:255:36
6:33
+0:02
25.2M
25.20 mi12:42:132:41:526:252:22
6:52
+0:19
Finish
26.22 mi12:48:412:48:206:256:28
6:21
-0:31

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

6:16 /mi

Average Pace

6:25 /mi

Slowest Pace

6:52 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:21:53

84% of race

Time at Steady Pace

26:27

16% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:25 /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 mi10:19:4919:286:1619:28
6:16
#1314
10K
6.21 mi10:39:2939:086:1819:40
6:20
#1559
15K
9.32 mi10:59:0958:486:1919:40
6:20
#1624
20K
12.43 mi11:18:591:18:386:2019:50
6:23
#1648
Half
13.11 mi11:23:171:22:566:204:18
6:18
#1651
25K
15.53 mi11:38:481:38:276:2015:31
6:24
#1652
30K
18.64 mi11:58:481:58:276:2120:00
6:26
#1560
20M
20.00 mi12:07:452:07:246:228:57
6:35
#1561
21M
21.00 mi12:14:342:14:136:236:49
6:49
#1537
35K
21.75 mi12:19:252:19:046:244:51
6:29
#1552
23M
23.00 mi12:27:442:27:236:248:19
6:39
#1547
24M
24.00 mi12:34:152:33:546:256:31
6:31
#1558
40K
24.85 mi12:39:512:39:306:255:36
6:33
#1546
25.2M
25.20 mi12:42:132:41:526:252:22
6:52
#1539
Finish
26.22 mi12:48:412:48:206:256:28
6:21
#1524
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1314124812481780(Top 7%)1704(Top 11%)1704(Top 32%)
10K6.21 mi3.10 mi1559-2451487-2391487-2391891(Top 7%)1810(Top 12%)1810(Top 34%)
15K9.32 mi3.11 mi1624-651551-641551-641780(Top 7%)1704(Top 11%)1704(Top 32%)
20K12.43 mi3.11 mi1648-241577-261577-261722(Top 6%)1648(Top 11%)1648(Top 31%)
Half13.11 mi0.68 mi1651-31580-31580-31765(Top 7%)1694(Top 11%)1694(Top 32%)
25K15.53 mi2.42 mi1652-1158015801706(Top 6%)1632(Top 11%)1632(Top 31%)
30K18.64 mi3.11 mi1560+921491+891491+891338(Top 5%)1280(Top 8%)1280(Top 24%)
20M20.00 mi1.36 mi1561-1149114911785(Top 7%)1701(Top 11%)1701(Top 32%)
21M21.00 mi1.00 mi1537+241469+221469+221451(Top 5%)1383(Top 9%)1383(Top 26%)
35K21.75 mi0.75 mi1552-151483-141483-142293(Top 9%)2173(Top 14%)2173(Top 41%)
23M23.00 mi1.25 mi1547+51477+61477+61919(Top 7%)1820(Top 12%)1820(Top 34%)
24M24.00 mi1.00 mi1558-111489-121489-122147(Top 8%)2013(Top 13%)2013(Top 38%)
40K24.85 mi0.85 mi1546+121476+131476+131719(Top 6%)1617(Top 11%)1617(Top 31%)
25.2M25.20 mi0.35 mi1539+71470+61470+61320(Top 5%)1250(Top 8%)1250(Top 24%)
Finish26.22 mi1.02 mi1524+151457+131457+131792(Top 7%)1676(Top 11%)1676(Top 32%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 7%
×21stories
+97ft-345ft

Overall

1780

Males

1704

M18-39

1704

5K→10K

3.1 - 6.2 mi

Top 7%
×5stories
+79ft-138ft

Overall

1891

Males

1810

M18-39

1810

10K→15K

6.2 - 9.3 mi

Top 7%
×3stories
+67ft-78ft

Overall

1780

Males

1704

M18-39

1704

15K→20K

9.3 - 12.4 mi

Top 6%
×5stories
+106ft-86ft

Overall

1722

Males

1648

M18-39

1648

20K→Half

12.4 - 13.1 mi

Top 7%
×2stories
+19ft-37ft

Overall

1765

Males

1694

M18-39

1694

Half→25K

13.1 - 15.5 mi

Top 6%
×4stories
+66ft-88ft

Overall

1706

Males

1632

M18-39

1632

25K→30K

15.5 - 18.6 mi

Top 5%
×9stories
+181ft-148ft

Overall

1338

Males

1280

M18-39

1280

30K→20M

18.6 - 20.0 mi

Top 7%
×5stories
+64ft-50ft

Overall

1785

Males

1701

M18-39

1701

20M→21M

20.0 - 21.0 mi

Top 5%
×8stories
+106ft-24ft

Overall

1451

Males

1383

M18-39

1383

21M→35K

21.0 - 21.8 mi

Top 9%
×7stories
+17ft-86ft

Overall

2293

Males

2173

M18-39

2173

35K→23M

21.8 - 23.0 mi

Top 7%
×5stories
+23ft-63ft

Overall

1919

Males

1820

M18-39

1820

23M→24M

23.0 - 24.0 mi

Top 8%
×6stories
+12ft-82ft

Overall

2147

Males

2013

M18-39

2013

24M→40K

24.0 - 24.9 mi

Top 6%
×1story
+6ft-20ft

Overall

1719

Males

1617

M18-39

1617

40K→25.2M

24.9 - 25.2 mi

Top 5%
×1story
+13ft-16ft

Overall

1320

Males

1250

M18-39

1250

25.2M→Finish

25.2 - 26.2 mi

Top 7%
×2stories
+22ft-21ft

Overall

1792

Males

1676

M18-39

1676

Passing Analysis

Category:
Athletes Passed
434
Passed By
644
Net Change
-210
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1314
5K → 10K12257-245#1314#1559
10K → 15K3297-65#1559#1624
15K → 20K4367-24#1624#1648
20K → Half1013-3#1648#1651
Half → 25K3940-1#1651#1652
25K → 30K11119+92#1652#1560
30K → 20M2627-1#1560#1561
20M → 21M3511+24#1561#1537
21M → 35K823-15#1537#1552
35K → 23M2823+5#1552#1547
23M → 24M2132-11#1547#1558
24M → 40K3119+12#1558#1546
40K → 25.2M125+7#1546#1539
25.2M → Finish2611+15#1539#1524
TOTALS434644-210
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing