Boston Marathon logo
BOSTON MARATHON 2025

Juan Antonio Valcarcel Castro

Bib: 30641•M

QC

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Gender (Male)
#0 / 16105
Division (M18-39)
#0 / 5642
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
29:02
Rank: #23707
Start → 5K
29:02 | 9:21/mi
10K· 6.21 mi
58:15
Rank: #23802 (-95)
5K → 10K
29:13 | 9:24/mi
15K· 9.32 mi
1:26:52
Rank: #23513 (+289)
10K → 15K
28:37 | 9:13/mi
20K· 12.43 mi
1:56:10
Rank: #23279 (+234)
15K → 20K
29:18 | 9:26/mi
Half· 13.11 mi
2:02:34
Rank: #23280 (-1)
20K → Half
6:24 | 9:23/mi
25K· 15.53 mi
2:26:06
Rank: #23132 (+148)
Half → 25K
23:32 | 9:42/mi
30K· 18.64 mi
2:59:14
Rank: #23131 (+1)
25K → 30K
33:08 | 10:40/mi
20M
3:13:50
Rank: #23130 (+1)
30K → 20M
14:36 | 10:45/mi
21M
3:25:32
Rank: #23117 (+13)
20M → 21M
11:42 | 11:42/mi
35K· 21.75 mi
3:33:14
Rank: #23086 (+31)
21M → 35K
7:42 | 10:18/mi
23M
3:46:36
Rank: #23058 (+28)
35K → 23M
13:22 | 10:41/mi
24M
3:56:58
Rank: #23037 (+21)
23M → 24M
10:22 | 10:22/mi
40K· 24.85 mi
4:06:11
Rank: #23001 (+36)
24M → 40K
9:13 | 10:47/mi
25.2M
4:10:23
Rank: #23024 (-23)
40K → 25.2M
4:12 | 12:11/mi
Finish· 26.22 mi
4:20:20
Rank: #22994 (+30)
25.2M → Finish
9:57 | 9:46/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
Time2:02:34
Pace9:21 /mi
2nd Half
Distance13.11 mi
Time2:17:46
Pace10:31 /mi
📊Positive Split: 12.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:54:4229:029:2129:02
9:21
-
10K
6.21 mi12:23:5558:159:2229:13
9:24
+0:03
15K
9.32 mi12:52:321:26:529:1928:37
9:13
-0:11
20K
12.43 mi13:21:501:56:109:2129:18
9:26
+0:13
Half
13.11 mi13:28:142:02:349:216:24
9:23
-0:03
25K
15.53 mi13:51:462:26:069:2423:32
9:42
+0:19
30K
18.64 mi14:24:542:59:149:3733:08
10:40
+0:58
20M
20.00 mi14:39:303:13:509:4114:36
10:45
+0:05
21M
21.00 mi14:51:123:25:329:4711:42
11:42
+0:57
35K
21.75 mi14:58:543:33:149:487:42
10:18
-1:24
23M
23.00 mi15:12:163:46:369:5113:22
10:41
+0:23
24M
24.00 mi15:22:383:56:589:5210:22
10:22
-0:19
40K
24.85 mi15:31:514:06:119:549:13
10:47
+0:25
25.2M
25.20 mi15:36:034:10:239:564:12
12:11
+1:24
Finish
26.22 mi15:46:004:20:209:569:57
9:46
-2:25

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

9:13 /mi

Average Pace

9:56 /mi

Slowest Pace

12:11 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:36:03

60% of race

Time at Steady Pace

1:04:34

25% of race

Time at Slower Pace

39:43

15% of race

Average Pace: 9:56 /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 mi11:54:4229:029:2129:02
9:21
#23707
10K
6.21 mi12:23:5558:159:2229:13
9:24
#23802
15K
9.32 mi12:52:321:26:529:1928:37
9:13
#23513
20K
12.43 mi13:21:501:56:109:2129:18
9:26
#23279
Half
13.11 mi13:28:142:02:349:216:24
9:23
#23280
25K
15.53 mi13:51:462:26:069:2423:32
9:42
#23132
30K
18.64 mi14:24:542:59:149:3733:08
10:40
#23131
20M
20.00 mi14:39:303:13:509:4114:36
10:45
#23130
21M
21.00 mi14:51:123:25:329:4711:42
11:42
#23117
35K
21.75 mi14:58:543:33:149:487:42
10:18
#23086
23M
23.00 mi15:12:163:46:369:5113:22
10:41
#23058
24M
24.00 mi15:22:383:56:589:5210:22
10:22
#23037
40K
24.85 mi15:31:514:06:119:549:13
10:47
#23001
25.2M
25.20 mi15:36:034:10:239:564:12
12:11
#23024
Finish
26.22 mi15:46:004:20:209:569:57
9:46
#22994
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi23707141061410622890(Top 81%)13787(Top 86%)13787(Top 244%)
10K6.21 mi3.10 mi23802-9514167-6114167-6123835(Top 84%)14186(Top 88%)14186(Top 251%)
15K9.32 mi3.11 mi23513+28914031+13614031+13622890(Top 81%)13787(Top 86%)13787(Top 244%)
20K12.43 mi3.11 mi23279+23413944+8713944+8722672(Top 80%)13649(Top 85%)13649(Top 242%)
Half13.11 mi0.68 mi23280-113943+113943+123175(Top 82%)13866(Top 86%)13866(Top 246%)
25K15.53 mi2.42 mi23132+14813859+8413859+8422514(Top 79%)13516(Top 84%)13516(Top 240%)
30K18.64 mi3.11 mi23131+113809+5013809+5023305(Top 82%)13749(Top 85%)13749(Top 244%)
20M20.00 mi1.36 mi23130+113792+1713792+1723049(Top 81%)13544(Top 84%)13544(Top 240%)
21M21.00 mi1.00 mi23117+1313772+2013772+2023015(Top 81%)13450(Top 84%)13450(Top 238%)
35K21.75 mi0.75 mi23086+3113744+2813744+2822663(Top 80%)13237(Top 82%)13237(Top 235%)
23M23.00 mi1.25 mi23058+2813704+4013704+4022468(Top 79%)13091(Top 81%)13091(Top 232%)
24M24.00 mi1.00 mi23037+2113666+3813666+3822439(Top 79%)13021(Top 81%)13021(Top 231%)
40K24.85 mi0.85 mi23001+3613633+3313633+3322635(Top 80%)13060(Top 81%)13060(Top 231%)
25.2M25.20 mi0.35 mi23024-2313639-613639-623555(Top 83%)13545(Top 84%)13545(Top 240%)
Finish26.22 mi1.02 mi22994+3013617+2213617+2222141(Top 78%)12855(Top 80%)12855(Top 228%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 81%
×21stories
+97ft-345ft

Overall

22890

Males

13787

M18-39

13787

5K→10K

3.1 - 6.2 mi

Top 84%
×5stories
+79ft-138ft

Overall

23835

Males

14186

M18-39

14186

10K→15K

6.2 - 9.3 mi

Top 81%
×3stories
+67ft-78ft

Overall

22890

Males

13787

M18-39

13787

15K→20K

9.3 - 12.4 mi

Top 80%
×5stories
+106ft-86ft

Overall

22672

Males

13649

M18-39

13649

20K→Half

12.4 - 13.1 mi

Top 82%
×2stories
+19ft-37ft

Overall

23175

Males

13866

M18-39

13866

Half→25K

13.1 - 15.5 mi

Top 79%
×4stories
+66ft-88ft

Overall

22514

Males

13516

M18-39

13516

25K→30K

15.5 - 18.6 mi

Top 82%
×9stories
+181ft-148ft

Overall

23305

Males

13749

M18-39

13749

30K→20M

18.6 - 20.0 mi

Top 81%
×5stories
+64ft-50ft

Overall

23049

Males

13544

M18-39

13544

20M→21M

20.0 - 21.0 mi

Top 81%
×8stories
+106ft-24ft

Overall

23015

Males

13450

M18-39

13450

21M→35K

21.0 - 21.8 mi

Top 80%
×7stories
+17ft-86ft

Overall

22663

Males

13237

M18-39

13237

35K→23M

21.8 - 23.0 mi

Top 79%
×5stories
+23ft-63ft

Overall

22468

Males

13091

M18-39

13091

23M→24M

23.0 - 24.0 mi

Top 79%
×6stories
+12ft-82ft

Overall

22439

Males

13021

M18-39

13021

24M→40K

24.0 - 24.9 mi

Top 80%
×1story
+6ft-20ft

Overall

22635

Males

13060

M18-39

13060

40K→25.2M

24.9 - 25.2 mi

Top 83%
×1story
+13ft-16ft

Overall

23555

Males

13545

M18-39

13545

25.2M→Finish

25.2 - 26.2 mi

Top 78%
×2stories
+22ft-21ft

Overall

22141

Males

12855

M18-39

12855

Passing Analysis

Category:
Athletes Passed
1680
Passed By
967
Net Change
+713
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23707
5K → 10K202297-95#23707#23802
10K → 15K33445+289#23802#23513
15K → 20K28147+234#23513#23279
20K → Half3132-1#23279#23280
Half → 25K20153+148#23280#23132
25K → 30K176175+1#23132#23131
30K → 20M7473+1#23131#23130
20M → 21M6855+13#23130#23117
21M → 35K5019+31#23117#23086
35K → 23M7850+28#23086#23058
23M → 24M6847+21#23058#23037
24M → 40K6125+36#23037#23001
40K → 25.2M932-23#23001#23024
25.2M → Finish4717+30#23024#22994
TOTALS1680967+713
📊

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