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BOSTON MARATHON 2025

Carlos Alfonso

Bib: 9404•M

IL

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 23%
Gender (Male)
#0 / 16105
Top 35%
Masters (Masters Men)
#0 / 10463
Top 22%
Division (M40-44)
#0 / 2247
Top 48%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:05
Rank: #6210
Start → 5K
6:47/mi
21:05 split
10K· 6.21 mi
42:14
Rank: #6265 (-55)
5K → 10K
6:48/mi
21:09 split
15K· 9.32 mi
1:03:19
Rank: #6125 (+140)
10K → 15K
6:47/mi
21:05 split
20K· 12.43 mi
1:24:12
Rank: #5718 (+407)
15K → 20K
6:43/mi
20:53 split
Half· 13.11 mi
1:28:44
Rank: #5665 (+53)
20K → Half
6:39/mi
4:32 split
25K· 15.53 mi
1:45:07
Rank: #5430 (+235)
Half → 25K
6:45/mi
16:23 split
30K· 18.64 mi
2:08:48
Rank: #6031 (-601)
25K → 30K
7:37/mi
23:41 split
20M
2:19:49
Rank: #6332 (-301)
30K → 20M
8:06/mi
11:01 split
21M
2:28:09
Rank: #6409 (-77)
20M → 21M
8:20/mi
8:20 split
35K· 21.75 mi
2:33:56
Rank: #6492 (-83)
21M → 35K
7:44/mi
5:47 split
23M
2:43:49
Rank: #6546 (-54)
35K → 23M
7:54/mi
9:53 split
24M
2:51:18
Rank: #6535 (+11)
23M → 24M
7:29/mi
7:29 split
40K· 24.85 mi
2:57:41
Rank: #6491 (+44)
24M → 40K
7:28/mi
6:23 split
25.2M
3:00:32
Rank: #6481 (+10)
40K → 25.2M
8:16/mi
2:51 split
Finish· 26.22 mi
3:08:00
Rank: #6490 (-9)
25.2M → Finish
7:20/mi
7:28 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:28:44
Pace6:46 /mi
2nd Half
Distance13.11 mi
Time1:39:16
Pace7:34 /mi
📊Positive Split: 11.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:4421:056:4721:05
6:47
-
10K
6.21 mi11:07:5342:146:4821:09
6:48
+0:01
15K
9.32 mi11:28:581:03:196:4821:05
6:47
-0:01
20K
12.43 mi11:49:511:24:126:4720:53
6:43
-0:04
Half
13.11 mi11:54:231:28:446:464:32
6:39
-0:04
25K
15.53 mi12:10:461:45:076:4616:23
6:45
+0:06
30K
18.64 mi12:34:272:08:486:5523:41
7:37
+0:52
20M
20.00 mi12:45:282:19:496:5911:01
8:06
+0:29
21M
21.00 mi12:53:482:28:097:038:20
8:20
+0:14
35K
21.75 mi12:59:352:33:567:055:47
7:44
-0:36
23M
23.00 mi13:09:282:43:497:079:53
7:54
+0:10
24M
24.00 mi13:16:572:51:187:087:29
7:29
-0:25
40K
24.85 mi13:23:202:57:417:096:23
7:28
-0:01
25.2M
25.20 mi13:26:113:00:327:102:51
8:16
+0:48
Finish
26.22 mi13:33:393:08:007:117:28
7:20
-0:56

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

6:39 /mi

Average Pace

7:11 /mi

Slowest Pace

8:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:45:07

56% of race

Time at Steady Pace

50:48

27% of race

Time at Slower Pace

32:05

17% of race

Average Pace: 7:10 /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 mi10:46:4421:056:4721:05
6:47
#6210
10K
6.21 mi11:07:5342:146:4821:09
6:48
#6265
15K
9.32 mi11:28:581:03:196:4821:05
6:47
#6125
20K
12.43 mi11:49:511:24:126:4720:53
6:43
#5718
Half
13.11 mi11:54:231:28:446:464:32
6:39
#5665
25K
15.53 mi12:10:461:45:076:4616:23
6:45
#5430
30K
18.64 mi12:34:272:08:486:5523:41
7:37
#6031
20M
20.00 mi12:45:282:19:496:5911:01
8:06
#6332
21M
21.00 mi12:53:482:28:097:038:20
8:20
#6409
35K
21.75 mi12:59:352:33:567:055:47
7:44
#6492
23M
23.00 mi13:09:282:43:497:079:53
7:54
#6546
24M
24.00 mi13:16:572:51:187:087:29
7:29
#6535
40K
24.85 mi13:23:202:57:417:096:23
7:28
#6491
25.2M
25.20 mi13:26:113:00:327:102:51
8:16
#6481
Finish
26.22 mi13:33:393:08:007:117:28
7:20
#6490
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi6210569056905955(Top 21%)5421(Top 34%)5421(Top 241%)
10K6.21 mi3.10 mi6265-555736-465736-466467(Top 23%)5855(Top 36%)5855(Top 261%)
15K9.32 mi3.11 mi6125+1405608+1285608+1285955(Top 21%)5421(Top 34%)5421(Top 241%)
20K12.43 mi3.11 mi5718+4075249+3595249+3594633(Top 16%)4306(Top 27%)4306(Top 192%)
Half13.11 mi0.68 mi5665+535204+455204+454863(Top 17%)4523(Top 28%)4523(Top 201%)
25K15.53 mi2.42 mi5430+2354998+2064998+2064559(Top 16%)4215(Top 26%)4215(Top 188%)
30K18.64 mi3.11 mi6031-6015466-4685466-4688610(Top 30%)6935(Top 43%)6935(Top 309%)
20M20.00 mi1.36 mi6332-3015686-2205686-22011116(Top 39%)8078(Top 50%)8078(Top 360%)
21M21.00 mi1.00 mi6409-775725-395725-399394(Top 33%)7030(Top 44%)7030(Top 313%)
35K21.75 mi0.75 mi6492-835771-465771-4610231(Top 36%)7465(Top 46%)7465(Top 332%)
23M23.00 mi1.25 mi6546-545778-75778-79219(Top 32%)6828(Top 42%)6828(Top 304%)
24M24.00 mi1.00 mi6535+115753+255753+257547(Top 27%)5836(Top 36%)5836(Top 260%)
40K24.85 mi0.85 mi6491+445697+565697+566588(Top 23%)5195(Top 32%)5195(Top 231%)
25.2M25.20 mi0.35 mi6481+105680+175680+177393(Top 26%)5558(Top 35%)5558(Top 247%)
Finish26.22 mi1.02 mi6490-95646+345646+347937(Top 28%)5871(Top 36%)5871(Top 261%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 21%
×21stories
+97ft-345ft

Overall

5955

Males

5421

M40-44

5421

5K→10K

3.1 - 6.2 mi

Top 23%
×5stories
+79ft-138ft

Overall

6467

Males

5855

M40-44

5855

10K→15K

6.2 - 9.3 mi

Top 21%
×3stories
+67ft-78ft

Overall

5955

Males

5421

M40-44

5421

15K→20K

9.3 - 12.4 mi

Top 16%
×5stories
+106ft-86ft

Overall

4633

Males

4306

M40-44

4306

20K→Half

12.4 - 13.1 mi

Top 17%
×2stories
+19ft-37ft

Overall

4863

Males

4523

M40-44

4523

Half→25K

13.1 - 15.5 mi

Top 16%
×4stories
+66ft-88ft

Overall

4559

Males

4215

M40-44

4215

25K→30K

15.5 - 18.6 mi

Top 30%
×9stories
+181ft-148ft

Overall

8610

Males

6935

M40-44

6935

30K→20M

18.6 - 20.0 mi

Top 39%
×5stories
+64ft-50ft

Overall

11116

Males

8078

M40-44

8078

20M→21M

20.0 - 21.0 mi

Top 33%
×8stories
+106ft-24ft

Overall

9394

Males

7030

M40-44

7030

21M→35K

21.0 - 21.8 mi

Top 36%
×7stories
+17ft-86ft

Overall

10231

Males

7465

M40-44

7465

35K→23M

21.8 - 23.0 mi

Top 32%
×5stories
+23ft-63ft

Overall

9219

Males

6828

M40-44

6828

23M→24M

23.0 - 24.0 mi

Top 27%
×6stories
+12ft-82ft

Overall

7547

Males

5836

M40-44

5836

24M→40K

24.0 - 24.9 mi

Top 23%
×1story
+6ft-20ft

Overall

6588

Males

5195

M40-44

5195

40K→25.2M

24.9 - 25.2 mi

Top 26%
×1story
+13ft-16ft

Overall

7393

Males

5558

M40-44

5558

25.2M→Finish

25.2 - 26.2 mi

Top 28%
×2stories
+22ft-21ft

Overall

7937

Males

5871

M40-44

5871

Passing Analysis

Category:
Athletes Passed
1575
Passed By
1855
Net Change
-280
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6210
5K → 10K162217-55#6210#6265
10K → 15K21575+140#6265#6125
15K → 20K41710+407#6125#5718
20K → Half585+53#5718#5665
Half → 25K25318+235#5665#5430
25K → 30K58659-601#5430#6031
30K → 20M28329-301#6031#6332
20M → 21M42119-77#6332#6409
21M → 35K29112-83#6409#6492
35K → 23M69123-54#6492#6546
23M → 24M6857+11#6546#6535
24M → 40K7733+44#6535#6491
40K → 25.2M3020+10#6491#6481
25.2M → Finish6978-9#6481#6490
TOTALS15751855-280
📊

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