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BOSTON MARATHON 2025

Janae Sernoffsky

Bib: 11587•F

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 24%
Gender (Female)
#0 / 12228
Top 7%
Division (F18-39)
#0 / 5469
Top 14%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:47
Rank: #5373
Start → 5K
20:47 | 6:41/mi
10K· 6.21 mi
41:58
Rank: #5882 (-509)
5K → 10K
21:11 | 6:49/mi
15K· 9.32 mi
1:03:35
Rank: #6435 (-553)
10K → 15K
21:37 | 6:57/mi
20K· 12.43 mi
1:25:51
Rank: #6887 (-452)
15K → 20K
22:16 | 7:10/mi
Half· 13.11 mi
1:30:34
Rank: #6901 (-14)
20K → Half
4:43 | 6:55/mi
25K· 15.53 mi
1:48:06
Rank: #6997 (-96)
Half → 25K
17:32 | 7:14/mi
30K· 18.64 mi
2:11:27
Rank: #7013 (-16)
25K → 30K
23:21 | 7:31/mi
20M
2:21:42
Rank: #6963 (+50)
30K → 20M
10:15 | 7:33/mi
21M
2:29:44
Rank: #6916 (+47)
20M → 21M
8:02 | 8:02/mi
35K· 21.75 mi
2:35:08
Rank: #6868 (+48)
21M → 35K
5:24 | 7:13/mi
23M
2:44:39
Rank: #6821 (+47)
35K → 23M
9:31 | 7:36/mi
24M
2:52:10
Rank: #6805 (+16)
23M → 24M
7:31 | 7:31/mi
40K· 24.85 mi
2:58:40
Rank: #6802 (+3)
24M → 40K
6:30 | 7:36/mi
25.2M
3:01:33
Rank: #6780 (+22)
40K → 25.2M
2:53 | 8:22/mi
Finish· 26.22 mi
3:08:58
Rank: #6757 (+23)
25.2M → Finish
7:25 | 7:17/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:30:34
Pace6:55 /mi
2nd Half
Distance13.11 mi
Time1:38:24
Pace7:30 /mi
📊Positive Split: 8.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:47:3220:476:4120:47
6:41
-
10K
6.21 mi11:08:4341:586:4521:11
6:49
+0:08
15K
9.32 mi11:30:201:03:356:4921:37
6:57
+0:08
20K
12.43 mi11:52:361:25:516:5422:16
7:10
+0:13
Half
13.11 mi11:57:191:30:346:554:43
6:55
-0:15
25K
15.53 mi12:14:511:48:066:5817:32
7:14
+0:19
30K
18.64 mi12:38:122:11:277:0323:21
7:31
+0:17
20M
20.00 mi12:48:272:21:427:0510:15
7:33
+0:02
21M
21.00 mi12:56:292:29:447:088:02
8:02
+0:29
35K
21.75 mi13:01:532:35:087:085:24
7:13
-0:49
23M
23.00 mi13:11:242:44:397:109:31
7:36
+0:23
24M
24.00 mi13:18:552:52:107:107:31
7:31
-0:05
40K
24.85 mi13:25:252:58:407:116:30
7:36
+0:05
25.2M
25.20 mi13:28:183:01:337:122:53
8:22
+0:46
Finish
26.22 mi13:35:433:08:587:137:25
7:17
-1:05

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

6:41 /mi

Average Pace

7:13 /mi

Slowest Pace

8:22 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:08:18

36% of race

Time at Steady Pace

52:37

28% of race

Time at Slower Pace

1:08:03

36% of race

Average Pace: 7:12 /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 mi10:47:3220:476:4120:47
6:41
#5373
10K
6.21 mi11:08:4341:586:4521:11
6:49
#5882
15K
9.32 mi11:30:201:03:356:4921:37
6:57
#6435
20K
12.43 mi11:52:361:25:516:5422:16
7:10
#6887
Half
13.11 mi11:57:191:30:346:554:43
6:55
#6901
25K
15.53 mi12:14:511:48:066:5817:32
7:14
#6997
30K
18.64 mi12:38:122:11:277:0323:21
7:31
#7013
20M
20.00 mi12:48:272:21:427:0510:15
7:33
#6963
21M
21.00 mi12:56:292:29:447:088:02
8:02
#6916
35K
21.75 mi13:01:532:35:087:085:24
7:13
#6868
23M
23.00 mi13:11:242:44:397:109:31
7:36
#6821
24M
24.00 mi13:18:552:52:107:107:31
7:31
#6805
40K
24.85 mi13:25:252:58:407:116:30
7:36
#6802
25.2M
25.20 mi13:28:183:01:337:122:53
8:22
#6780
Finish
26.22 mi13:35:433:08:587:137:25
7:17
#6757
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi53733713717369(Top 26%)825(Top 7%)825(Top 15%)
10K6.21 mi3.10 mi5882-509464-93464-936619(Top 23%)626(Top 5%)626(Top 11%)
15K9.32 mi3.11 mi6435-553577-113577-1137369(Top 26%)825(Top 7%)825(Top 15%)
20K12.43 mi3.11 mi6887-452678-101678-1017952(Top 28%)1086(Top 9%)1086(Top 20%)
Half13.11 mi0.68 mi6901-14686-8686-87066(Top 25%)791(Top 6%)791(Top 14%)
25K15.53 mi2.42 mi6997-96726-40726-407843(Top 28%)1152(Top 9%)1152(Top 21%)
30K18.64 mi3.11 mi7013-16775-49775-497860(Top 28%)1333(Top 11%)1333(Top 24%)
20M20.00 mi1.36 mi6963+50800-25800-257314(Top 26%)1260(Top 10%)1260(Top 23%)
21M21.00 mi1.00 mi6916+47799+1799+17544(Top 27%)1524(Top 12%)1524(Top 28%)
35K21.75 mi0.75 mi6868+48806-7806-76760(Top 24%)1181(Top 10%)1181(Top 22%)
23M23.00 mi1.25 mi6821+47834-28834-287272(Top 26%)1508(Top 12%)1508(Top 28%)
24M24.00 mi1.00 mi6805+16857-23857-237839(Top 28%)1788(Top 15%)1788(Top 33%)
40K24.85 mi0.85 mi6802+3883-26883-267444(Top 26%)1722(Top 14%)1722(Top 31%)
25.2M25.20 mi0.35 mi6780+22887-4887-47983(Top 28%)2041(Top 17%)2041(Top 37%)
Finish26.22 mi1.02 mi6757+23907-20907-207631(Top 27%)1903(Top 16%)1903(Top 35%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 26%
×21stories
+97ft-345ft

Overall

7369

Females

825

F18-39

825

5K→10K

3.1 - 6.2 mi

Top 23%
×5stories
+79ft-138ft

Overall

6619

Females

626

F18-39

626

10K→15K

6.2 - 9.3 mi

Top 26%
×3stories
+67ft-78ft

Overall

7369

Females

825

F18-39

825

15K→20K

9.3 - 12.4 mi

Top 28%
×5stories
+106ft-86ft

Overall

7952

Females

1086

F18-39

1086

20K→Half

12.4 - 13.1 mi

Top 25%
×2stories
+19ft-37ft

Overall

7066

Females

791

F18-39

791

Half→25K

13.1 - 15.5 mi

Top 28%
×4stories
+66ft-88ft

Overall

7843

Females

1152

F18-39

1152

25K→30K

15.5 - 18.6 mi

Top 28%
×9stories
+181ft-148ft

Overall

7860

Females

1333

F18-39

1333

30K→20M

18.6 - 20.0 mi

Top 26%
×5stories
+64ft-50ft

Overall

7314

Females

1260

F18-39

1260

20M→21M

20.0 - 21.0 mi

Top 27%
×8stories
+106ft-24ft

Overall

7544

Females

1524

F18-39

1524

21M→35K

21.0 - 21.8 mi

Top 24%
×7stories
+17ft-86ft

Overall

6760

Females

1181

F18-39

1181

35K→23M

21.8 - 23.0 mi

Top 26%
×5stories
+23ft-63ft

Overall

7272

Females

1508

F18-39

1508

23M→24M

23.0 - 24.0 mi

Top 28%
×6stories
+12ft-82ft

Overall

7839

Females

1788

F18-39

1788

24M→40K

24.0 - 24.9 mi

Top 26%
×1story
+6ft-20ft

Overall

7444

Females

1722

F18-39

1722

40K→25.2M

24.9 - 25.2 mi

Top 28%
×1story
+13ft-16ft

Overall

7983

Females

2041

F18-39

2041

25.2M→Finish

25.2 - 26.2 mi

Top 27%
×2stories
+22ft-21ft

Overall

7631

Females

1903

F18-39

1903

Passing Analysis

Category:
Athletes Passed
1096
Passed By
2480
Net Change
-1384
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5373
5K → 10K39548-509#5373#5882
10K → 15K50603-553#5882#6435
15K → 20K33485-452#6435#6887
20K → Half2438-14#6887#6901
Half → 25K92188-96#6901#6997
25K → 30K172188-16#6997#7013
30K → 20M12373+50#7013#6963
20M → 21M11366+47#6963#6916
21M → 35K8436+48#6916#6868
35K → 23M11063+47#6868#6821
23M → 24M7761+16#6821#6805
24M → 40K6764+3#6805#6802
40K → 25.2M4220+22#6802#6780
25.2M → Finish7047+23#6780#6757
TOTALS10962480-1384
📊

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