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BOSTON MARATHON 2025

Carlos Gil Del Alcazar

Bib: 25887•M

MA

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

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
9:32/mi
29:36
↑ 97↓ 3451.5%
10K· 6.21 mi
9:07/mi
57:56
↑ 79↓ 1380.4%
15K· 9.32 mi
8:52/mi
1:25:29
↑ 67↓ 78
20K· 12.43 mi
9:19/mi
1:54:27
↑ 106↓ 860.1%
Half· 13.11 mi
9:14/mi
2:00:45
↑ 19↓ 370.5%
25K· 15.53 mi
9:46/mi
2:24:26
↑ 66↓ 880.2%
30K· 18.64 mi
10:22/mi
2:56:38
↑ 181↓ 1480.2%
20M
10:17/mi
3:10:36
↑ 64↓ 500.2%
21M
11:54/mi
3:22:30
↑ 106↓ 241.6%
35K· 21.75 mi
11:36/mi
3:31:11
↑ 17↓ 861.7%
23M
10:23/mi
3:44:11
↑ 23↓ 630.6%
24M
10:17/mi
3:54:28
↓ 821.3%
40K· 24.85 mi
12:32/mi
4:05:11
↓ 200.3%
25.2M
10:35/mi
4:08:50
↑ 13↓ 160.2%
Finish· 26.22 mi
9:16/mi
4:18:17
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:00:45
Pace9:13 /mi
2nd Half
Distance13.11 mi
Time2:17:32
Pace10:29 /mi
📊Positive Split: 13.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:45:3129:369:3229:36
9:32
-
10K
6.21 mi12:13:5157:569:1928:20
9:07
-0:25
15K
9.32 mi12:41:241:25:299:1027:33
8:52
-0:15
20K
12.43 mi13:10:221:54:279:1328:58
9:19
+0:27
Half
13.11 mi13:16:402:00:459:136:18
9:14
-0:05
25K
15.53 mi13:40:212:24:269:1823:41
9:46
+0:32
30K
18.64 mi14:12:332:56:389:2932:12
10:22
+0:36
20M
20.00 mi14:26:313:10:369:3213:58
10:17
-0:05
21M
21.00 mi14:38:253:22:309:3911:54
11:54
+1:37
35K
21.75 mi14:47:063:31:119:438:41
11:36
-0:18
23M
23.00 mi15:00:063:44:119:4513:00
10:23
-1:13
24M
24.00 mi15:10:233:54:289:4610:17
10:17
-0:06
40K
24.85 mi15:21:064:05:119:5210:43
12:32
+2:15
25.2M
25.20 mi15:24:454:08:509:523:39
10:35
-1:57
Finish
26.22 mi15:34:124:18:179:519:27
9:16
-1:19

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

8:52 /mi

Average Pace

9:51 /mi

Slowest Pace

12:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:10:12

50% of race

Time at Steady Pace

1:36:47

37% of race

Time at Slower Pace

31:18

12% of race

Average Pace: 9:51 /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 mi11:45:3129:369:3229:36
9:32
#24329
10K
6.21 mi12:13:5157:569:1928:20
9:07
#23634
15K
9.32 mi12:41:241:25:299:1027:33
8:52
#22974
20K
12.43 mi13:10:221:54:279:1328:58
9:19
#22822
Half
13.11 mi13:16:402:00:459:136:18
9:14
#22821
25K
15.53 mi13:40:212:24:269:1823:41
9:46
#22782
30K
18.64 mi14:12:332:56:389:2932:12
10:22
#22740
20M
20.00 mi14:26:313:10:369:3213:58
10:17
#22650
21M
21.00 mi14:38:253:22:309:3911:54
11:54
#22698
35K
21.75 mi14:47:063:31:119:438:41
11:36
#22826
23M
23.00 mi15:00:063:44:119:4513:00
10:23
#22752
24M
24.00 mi15:10:233:54:289:4610:17
10:17
#22694
40K
24.85 mi15:21:064:05:119:5210:43
12:32
#22878
25.2M
25.20 mi15:24:454:08:509:523:39
10:35
#22820
Finish
26.22 mi15:34:124:18:179:519:27
9:16
#22740
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi24329144011440121379(Top 75%)13120(Top 81%)13120(Top 233%)
10K6.21 mi3.10 mi23634+69514071+33014071+33022889(Top 81%)13763(Top 85%)13763(Top 244%)
15K9.32 mi3.11 mi22974+66013802+26913802+26921379(Top 75%)13120(Top 81%)13120(Top 233%)
20K12.43 mi3.11 mi22822+15213738+6413738+6422344(Top 79%)13507(Top 84%)13507(Top 239%)
Half13.11 mi0.68 mi22821+113736+213736+222711(Top 80%)13658(Top 85%)13658(Top 242%)
25K15.53 mi2.42 mi22782+3913696+4013696+4022691(Top 80%)13604(Top 84%)13604(Top 241%)
30K18.64 mi3.11 mi22740+4213642+5413642+5422624(Top 80%)13445(Top 83%)13445(Top 238%)
20M20.00 mi1.36 mi22650+9013575+6713575+6721797(Top 77%)12955(Top 80%)12955(Top 230%)
21M21.00 mi1.00 mi22698-4813579-413579-423405(Top 82%)13631(Top 85%)13631(Top 242%)
35K21.75 mi0.75 mi22826-12813619-4013619-4025268(Top 89%)14476(Top 90%)14476(Top 257%)
23M23.00 mi1.25 mi22752+7413563+5613563+5621692(Top 76%)12727(Top 79%)12727(Top 226%)
24M24.00 mi1.00 mi22694+5813517+4613517+4622186(Top 78%)12902(Top 80%)12902(Top 229%)
40K24.85 mi0.85 mi22878-18413573-5613573-5625695(Top 90%)14633(Top 91%)14633(Top 259%)
25.2M25.20 mi0.35 mi22820+5813544+2913544+2919297(Top 68%)11456(Top 71%)11456(Top 203%)
Finish26.22 mi1.02 mi22740+8013493+5113493+5120274(Top 71%)11948(Top 74%)11948(Top 212%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 75%
×21story building
+97ft-345ft

Overall

21379

Males

13120

M18-39

13120

5K→10K

3.1 - 6.2 mi

Top 81%
×5story building
+79ft-138ft

Overall

22889

Males

13763

M18-39

13763

10K→15K

6.2 - 9.3 mi

Top 75%
×3story building
+67ft-78ft

Overall

21379

Males

13120

M18-39

13120

15K→20K

9.3 - 12.4 mi

Top 79%
×5story building
+106ft-86ft

Overall

22344

Males

13507

M18-39

13507

20K→Half

12.4 - 13.1 mi

Top 80%
×2story building
+19ft-37ft

Overall

22711

Males

13658

M18-39

13658

Half→25K

13.1 - 15.5 mi

Top 80%
×4story building
+66ft-88ft

Overall

22691

Males

13604

M18-39

13604

25K→30K

15.5 - 18.6 mi

Top 80%
×9story building
+181ft-148ft

Overall

22624

Males

13445

M18-39

13445

30K→20M

18.6 - 20.0 mi

Top 77%
×5story building
+64ft-50ft

Overall

21797

Males

12955

M18-39

12955

20M→21M

20.0 - 21.0 mi

Top 82%
×8story building
+106ft-24ft

Overall

23405

Males

13631

M18-39

13631

21M→35K

21.0 - 21.8 mi

Top 89%
×7story building
+17ft-86ft

Overall

25268

Males

14476

M18-39

14476

35K→23M

21.8 - 23.0 mi

Top 76%
×5story building
+23ft-63ft

Overall

21692

Males

12727

M18-39

12727

23M→24M

23.0 - 24.0 mi

Top 78%
×6story building
+12ft-82ft

Overall

22186

Males

12902

M18-39

12902

24M→40K

24.0 - 24.9 mi

Top 90%
×1story
+6ft-20ft

Overall

25695

Males

14633

M18-39

14633

40K→25.2M

24.9 - 25.2 mi

Top 68%
×1story
+13ft-16ft

Overall

19297

Males

11456

M18-39

11456

25.2M→Finish

25.2 - 26.2 mi

Top 71%
×2story building
+22ft-21ft

Overall

20274

Males

11948

M18-39

11948

Passing Analysis

Category:
Athletes Passed
2572
Passed By
983
Net Change
+1589
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24329
5K → 10K73641+695#24329#23634
10K → 15K6677+660#23634#22974
15K → 20K252100+152#22974#22822
20K → Half3433+1#22822#22821
Half → 25K158119+39#22821#22782
25K → 30K179137+42#22782#22740
30K → 20M12232+90#22740#22650
20M → 21M56104-48#22650#22698
21M → 35K19147-128#22698#22826
35K → 23M10733+74#22826#22752
23M → 24M8123+58#22752#22694
24M → 40K12196-184#22694#22878
40K → 25.2M580+58#22878#22820
25.2M → Finish9111+80#22820#22740
TOTALS2572983+1589
📊

Passing Visuals

Category:
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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