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BOSTON MARATHON 2025

Caroline Zaffino

Bib: 28054•F

OH

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:06
Rank: #14460
Start → 5K
24:06 | 7:45/mi
10K· 6.21 mi
48:03
Rank: #14184 (+276)
5K → 10K
23:57 | 7:43/mi
15K· 9.32 mi
1:12:53
Rank: #14810 (-626)
10K → 15K
24:50 | 8:00/mi
20K· 12.43 mi
1:38:33
Rank: #15381 (-571)
15K → 20K
25:40 | 8:16/mi
Half· 13.11 mi
1:44:03
Rank: #15419 (-38)
20K → Half
5:30 | 8:04/mi
25K· 15.53 mi
2:05:45
Rank: #16290 (-871)
Half → 25K
21:42 | 8:57/mi
30K· 18.64 mi
2:38:28
Rank: #18135 (-1845)
25K → 30K
32:43 | 10:32/mi
20M
2:50:16
Rank: #17864 (+271)
30K → 20M
11:48 | 8:41/mi
21M
2:59:49
Rank: #17775 (+89)
20M → 21M
9:33 | 9:33/mi
35K· 21.75 mi
3:05:59
Rank: #17622 (+153)
21M → 35K
6:10 | 8:15/mi
23M
3:17:42
Rank: #17640 (-18)
35K → 23M
11:43 | 9:21/mi
24M
3:27:33
Rank: #17825 (-185)
23M → 24M
9:51 | 9:51/mi
40K· 24.85 mi
3:34:49
Rank: #17657 (+168)
24M → 40K
7:16 | 8:30/mi
25.2M
3:38:10
Rank: #17616 (+41)
40K → 25.2M
3:21 | 9:43/mi
Finish· 26.22 mi
3:46:46
Rank: #17539 (+77)
25.2M → Finish
8:36 | 8:26/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:03
Pace7:56 /mi
2nd Half
Distance13.11 mi
Time2:02:43
Pace9:22 /mi
📊Positive Split: 17.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:41:0624:067:4524:06
7:45
-
10K
6.21 mi12:05:0348:037:4423:57
7:43
-0:02
15K
9.32 mi12:29:531:12:537:4924:50
8:00
+0:17
20K
12.43 mi12:55:331:38:337:5625:40
8:16
+0:16
Half
13.11 mi13:01:031:44:037:565:30
8:04
-0:12
25K
15.53 mi13:22:452:05:458:0621:42
8:57
+0:53
30K
18.64 mi13:55:282:38:288:3032:43
10:32
+1:35
20M
20.00 mi14:07:162:50:168:3111:48
8:41
-1:51
21M
21.00 mi14:16:492:59:498:349:33
9:33
+0:52
35K
21.75 mi14:22:593:05:598:336:10
8:15
-1:18
23M
23.00 mi14:34:423:17:428:3611:43
9:21
+1:06
24M
24.00 mi14:44:333:27:338:399:51
9:51
+0:30
40K
24.85 mi14:51:493:34:498:397:16
8:30
-1:21
25.2M
25.20 mi14:55:103:38:108:393:21
9:43
+1:13
Finish
26.22 mi15:03:463:46:468:398:36
8:26
-1:17

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

7:43 /mi

Average Pace

8:39 /mi

Slowest Pace

10:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:18:23

35% of race

Time at Steady Pace

59:30

26% of race

Time at Slower Pace

1:28:53

39% of race

Average Pace: 8:39 /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 mi11:41:0624:067:4524:06
7:45
#14460
10K
6.21 mi12:05:0348:037:4423:57
7:43
#14184
15K
9.32 mi12:29:531:12:537:4924:50
8:00
#14810
20K
12.43 mi12:55:331:38:337:5625:40
8:16
#15381
Half
13.11 mi13:01:031:44:037:565:30
8:04
#15419
25K
15.53 mi13:22:452:05:458:0621:42
8:57
#16290
30K
18.64 mi13:55:282:38:288:3032:43
10:32
#18135
20M
20.00 mi14:07:162:50:168:3111:48
8:41
#17864
21M
21.00 mi14:16:492:59:498:349:33
9:33
#17775
35K
21.75 mi14:22:593:05:598:336:10
8:15
#17622
23M
23.00 mi14:34:423:17:428:3611:43
9:21
#17640
24M
24.00 mi14:44:333:27:338:399:51
9:51
#17825
40K
24.85 mi14:51:493:34:498:397:16
8:30
#17657
25.2M
25.20 mi14:55:103:38:108:393:21
9:43
#17616
Finish
26.22 mi15:03:463:46:468:398:36
8:26
#17539
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi144604196419616020(Top 56%)5159(Top 42%)5159(Top 94%)
10K6.21 mi3.10 mi14184+2764050+1464050+14613991(Top 49%)3960(Top 32%)3960(Top 72%)
15K9.32 mi3.11 mi14810-6264441-3914441-39116020(Top 56%)5159(Top 42%)5159(Top 94%)
20K12.43 mi3.11 mi15381-5714798-3574798-35716722(Top 59%)5623(Top 46%)5623(Top 103%)
Half13.11 mi0.68 mi15419-384821-234821-2316451(Top 58%)5456(Top 45%)5456(Top 100%)
25K15.53 mi2.42 mi16290-8715335-5145335-51419685(Top 69%)7354(Top 60%)7354(Top 134%)
30K18.64 mi3.11 mi18135-18456475-11406475-114022999(Top 81%)9320(Top 76%)9320(Top 170%)
20M20.00 mi1.36 mi17864+2716347+1286347+12814992(Top 53%)5051(Top 41%)5051(Top 92%)
21M21.00 mi1.00 mi17775+896310+376310+3716332(Top 57%)5891(Top 48%)5891(Top 108%)
35K21.75 mi0.75 mi17622+1536252+586252+5813961(Top 49%)4673(Top 38%)4673(Top 85%)
23M23.00 mi1.25 mi17640-186301-496301-4918056(Top 64%)7005(Top 57%)7005(Top 128%)
24M24.00 mi1.00 mi17825-1856437-1366437-13620897(Top 74%)8547(Top 70%)8547(Top 156%)
40K24.85 mi0.85 mi17657+1686366+716366+7113480(Top 47%)4707(Top 38%)4707(Top 86%)
25.2M25.20 mi0.35 mi17616+416352+146352+1415761(Top 55%)5972(Top 49%)5972(Top 109%)
Finish26.22 mi1.02 mi17539+776332+206332+2015860(Top 56%)5949(Top 49%)5949(Top 109%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 56%
×21stories
+97ft-345ft

Overall

16020

Females

5159

F18-39

5159

5K→10K

3.1 - 6.2 mi

Top 49%
×5stories
+79ft-138ft

Overall

13991

Females

3960

F18-39

3960

10K→15K

6.2 - 9.3 mi

Top 56%
×3stories
+67ft-78ft

Overall

16020

Females

5159

F18-39

5159

15K→20K

9.3 - 12.4 mi

Top 59%
×5stories
+106ft-86ft

Overall

16722

Females

5623

F18-39

5623

20K→Half

12.4 - 13.1 mi

Top 58%
×2stories
+19ft-37ft

Overall

16451

Females

5456

F18-39

5456

Half→25K

13.1 - 15.5 mi

Top 69%
×4stories
+66ft-88ft

Overall

19685

Females

7354

F18-39

7354

25K→30K

15.5 - 18.6 mi

Top 81%
×9stories
+181ft-148ft

Overall

22999

Females

9320

F18-39

9320

30K→20M

18.6 - 20.0 mi

Top 53%
×5stories
+64ft-50ft

Overall

14992

Females

5051

F18-39

5051

20M→21M

20.0 - 21.0 mi

Top 57%
×8stories
+106ft-24ft

Overall

16332

Females

5891

F18-39

5891

21M→35K

21.0 - 21.8 mi

Top 49%
×7stories
+17ft-86ft

Overall

13961

Females

4673

F18-39

4673

35K→23M

21.8 - 23.0 mi

Top 64%
×5stories
+23ft-63ft

Overall

18056

Females

7005

F18-39

7005

23M→24M

23.0 - 24.0 mi

Top 74%
×6stories
+12ft-82ft

Overall

20897

Females

8547

F18-39

8547

24M→40K

24.0 - 24.9 mi

Top 47%
×1story
+6ft-20ft

Overall

13480

Females

4707

F18-39

4707

40K→25.2M

24.9 - 25.2 mi

Top 55%
×1story
+13ft-16ft

Overall

15761

Females

5972

F18-39

5972

25.2M→Finish

25.2 - 26.2 mi

Top 56%
×2stories
+22ft-21ft

Overall

15860

Females

5949

F18-39

5949

Passing Analysis

Category:
Athletes Passed
1709
Passed By
4788
Net Change
-3079
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14460
5K → 10K436160+276#14460#14184
10K → 15K62688-626#14184#14810
15K → 20K88659-571#14810#15381
20K → Half2664-38#15381#15419
Half → 25K35906-871#15419#16290
25K → 30K161861-1845#16290#18135
30K → 20M28110+271#18135#17864
20M → 21M14152+89#17864#17775
21M → 35K1596+153#17775#17622
35K → 23M102120-18#17622#17640
23M → 24M43228-185#17640#17825
24M → 40K1713+168#17825#17657
40K → 25.2M5110+41#17657#17616
25.2M → Finish9821+77#17616#17539
TOTALS17094788-3079
📊

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