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BOSTON MARATHON 2025

Chapin Jacob

Bib: 1193•M

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 20%
Gender (Male)
#0 / 16105
Top 31%
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
20:38
Rank: #4956
Start → 5K
20:38 | 6:38/mi
10K· 6.21 mi
41:59
Rank: #5899 (-943)
5K → 10K
21:21 | 6:52/mi
15K· 9.32 mi
1:03:28
Rank: #6291 (-392)
10K → 15K
21:29 | 6:55/mi
20K· 12.43 mi
1:25:35
Rank: #6733 (-442)
15K → 20K
22:07 | 7:07/mi
Half· 13.11 mi
1:30:03
Rank: #6586 (+147)
20K → Half
4:28 | 6:33/mi
25K· 15.53 mi
1:47:07
Rank: #6540 (+46)
Half → 25K
17:04 | 7:02/mi
30K· 18.64 mi
2:09:18
Rank: #6234 (+306)
25K → 30K
22:11 | 7:08/mi
20M
2:19:12
Rank: #6136 (+98)
30K → 20M
9:54 | 7:17/mi
21M
2:26:47
Rank: #6013 (+123)
20M → 21M
7:35 | 7:35/mi
35K· 21.75 mi
2:32:03
Rank: #5978 (+35)
21M → 35K
5:16 | 7:02/mi
23M
2:41:13
Rank: #5866 (+112)
35K → 23M
9:10 | 7:19/mi
24M
2:48:20
Rank: #5775 (+91)
23M → 24M
7:07 | 7:07/mi
40K· 24.85 mi
2:54:39
Rank: #5735 (+40)
24M → 40K
6:19 | 7:23/mi
25.2M
2:57:25
Rank: #5706 (+29)
40K → 25.2M
2:46 | 8:01/mi
Finish· 26.22 mi
3:04:32
Rank: #5639 (+67)
25.2M → Finish
7:07 | 6:59/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:30:03
Pace6:52 /mi
2nd Half
Distance13.11 mi
Time1:34:29
Pace7:12 /mi
📊Positive Split: 4.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:20:5420:386:3820:38
6:38
-
10K
6.21 mi10:42:1541:596:4521:21
6:52
+0:14
15K
9.32 mi11:03:441:03:286:4921:29
6:55
+0:03
20K
12.43 mi11:25:511:25:356:5322:07
7:07
+0:12
Half
13.11 mi11:30:191:30:036:524:28
6:33
-0:34
25K
15.53 mi11:47:231:47:076:5417:04
7:02
+0:29
30K
18.64 mi12:09:342:09:186:5622:11
7:08
+0:06
20M
20.00 mi12:19:282:19:126:589:54
7:17
+0:09
21M
21.00 mi12:27:032:26:476:597:35
7:35
+0:18
35K
21.75 mi12:32:192:32:036:595:16
7:02
-0:33
23M
23.00 mi12:41:292:41:137:019:10
7:19
+0:17
24M
24.00 mi12:48:362:48:207:017:07
7:07
-0:12
40K
24.85 mi12:54:552:54:397:026:19
7:23
+0:16
25.2M
25.20 mi12:57:412:57:257:022:46
8:01
+0:38
Finish
26.22 mi13:04:483:04:327:037:07
6:59
-1:02

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

6:33 /mi

Average Pace

7:03 /mi

Slowest Pace

8:01 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:07:56

37% of race

Time at Steady Pace

1:30:46

49% of race

Time at Slower Pace

25:50

14% of race

Average Pace: 7:02 /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 mi10:20:5420:386:3820:38
6:38
#4956
10K
6.21 mi10:42:1541:596:4521:21
6:52
#5899
15K
9.32 mi11:03:441:03:286:4921:29
6:55
#6291
20K
12.43 mi11:25:511:25:356:5322:07
7:07
#6733
Half
13.11 mi11:30:191:30:036:524:28
6:33
#6586
25K
15.53 mi11:47:231:47:076:5417:04
7:02
#6540
30K
18.64 mi12:09:342:09:186:5622:11
7:08
#6234
20M
20.00 mi12:19:282:19:126:589:54
7:17
#6136
21M
21.00 mi12:27:032:26:476:597:35
7:35
#6013
35K
21.75 mi12:32:192:32:036:595:16
7:02
#5978
23M
23.00 mi12:41:292:41:137:019:10
7:19
#5866
24M
24.00 mi12:48:362:48:207:017:07
7:07
#5775
40K
24.85 mi12:54:552:54:397:026:19
7:23
#5735
25.2M
25.20 mi12:57:412:57:257:022:46
8:01
#5706
Finish
26.22 mi13:04:483:04:327:037:07
6:59
#5639
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi4956464046407047(Top 25%)6282(Top 39%)6282(Top 111%)
10K6.21 mi3.10 mi5899-9435424-7845424-7847036(Top 25%)6302(Top 39%)6302(Top 112%)
15K9.32 mi3.11 mi6291-3925740-3165740-3167047(Top 25%)6282(Top 39%)6282(Top 111%)
20K12.43 mi3.11 mi6733-4426073-3336073-3337630(Top 27%)6631(Top 41%)6631(Top 118%)
Half13.11 mi0.68 mi6586+1475949+1245949+1244059(Top 14%)3823(Top 24%)3823(Top 68%)
25K15.53 mi2.42 mi6540+465898+515898+516566(Top 23%)5811(Top 36%)5811(Top 103%)
30K18.64 mi3.11 mi6234+3065618+2805618+2805557(Top 20%)4980(Top 31%)4980(Top 88%)
20M20.00 mi1.36 mi6136+985523+955523+955702(Top 20%)4982(Top 31%)4982(Top 88%)
21M21.00 mi1.00 mi6013+1235415+1085415+1085051(Top 18%)4418(Top 27%)4418(Top 78%)
35K21.75 mi0.75 mi5978+355379+365379+365639(Top 20%)4827(Top 30%)4827(Top 86%)
23M23.00 mi1.25 mi5866+1125278+1015278+1015579(Top 20%)4723(Top 29%)4723(Top 84%)
24M24.00 mi1.00 mi5775+915191+875191+875308(Top 19%)4475(Top 28%)4475(Top 79%)
40K24.85 mi0.85 mi5735+405148+435148+436126(Top 22%)4926(Top 31%)4926(Top 87%)
25.2M25.20 mi0.35 mi5706+295115+335115+336043(Top 21%)4769(Top 30%)4769(Top 85%)
Finish26.22 mi1.02 mi5639+675052+635052+635633(Top 20%)4504(Top 28%)4504(Top 80%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 25%
×21stories
+97ft-345ft

Overall

7047

Males

6282

M18-39

6282

5K→10K

3.1 - 6.2 mi

Top 25%
×5stories
+79ft-138ft

Overall

7036

Males

6302

M18-39

6302

10K→15K

6.2 - 9.3 mi

Top 25%
×3stories
+67ft-78ft

Overall

7047

Males

6282

M18-39

6282

15K→20K

9.3 - 12.4 mi

Top 27%
×5stories
+106ft-86ft

Overall

7630

Males

6631

M18-39

6631

20K→Half

12.4 - 13.1 mi

Top 14%
×2stories
+19ft-37ft

Overall

4059

Males

3823

M18-39

3823

Half→25K

13.1 - 15.5 mi

Top 23%
×4stories
+66ft-88ft

Overall

6566

Males

5811

M18-39

5811

25K→30K

15.5 - 18.6 mi

Top 20%
×9stories
+181ft-148ft

Overall

5557

Males

4980

M18-39

4980

30K→20M

18.6 - 20.0 mi

Top 20%
×5stories
+64ft-50ft

Overall

5702

Males

4982

M18-39

4982

20M→21M

20.0 - 21.0 mi

Top 18%
×8stories
+106ft-24ft

Overall

5051

Males

4418

M18-39

4418

21M→35K

21.0 - 21.8 mi

Top 20%
×7stories
+17ft-86ft

Overall

5639

Males

4827

M18-39

4827

35K→23M

21.8 - 23.0 mi

Top 20%
×5stories
+23ft-63ft

Overall

5579

Males

4723

M18-39

4723

23M→24M

23.0 - 24.0 mi

Top 19%
×6stories
+12ft-82ft

Overall

5308

Males

4475

M18-39

4475

24M→40K

24.0 - 24.9 mi

Top 22%
×1story
+6ft-20ft

Overall

6126

Males

4926

M18-39

4926

40K→25.2M

24.9 - 25.2 mi

Top 21%
×1story
+13ft-16ft

Overall

6043

Males

4769

M18-39

4769

25.2M→Finish

25.2 - 26.2 mi

Top 20%
×2stories
+22ft-21ft

Overall

5633

Males

4504

M18-39

4504

Passing Analysis

Category:
Athletes Passed
1521
Passed By
2204
Net Change
-683
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4956
5K → 10K16959-943#4956#5899
10K → 15K59451-392#5899#6291
15K → 20K44486-442#6291#6733
20K → Half1470+147#6733#6586
Half → 25K14599+46#6586#6540
25K → 30K34135+306#6540#6234
30K → 20M12527+98#6234#6136
20M → 21M13916+123#6136#6013
21M → 35K5924+35#6013#5978
35K → 23M13321+112#5978#5866
23M → 24M10817+91#5866#5775
24M → 40K7131+40#5775#5735
40K → 25.2M4314+29#5735#5706
25.2M → Finish9124+67#5706#5639
TOTALS15212204-683
📊

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