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BOSTON MARATHON 2025

Laura Bernazzani

Bib: 29589•F

MA

0:00
0:00
/ mi
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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

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
8:43/mi
27:05
↑ 97↓ 3451.5%
10K· 6.21 mi
8:30/mi
53:29
↑ 79↓ 1380.4%
15K· 9.32 mi
8:38/mi
1:20:18
↑ 67↓ 78
20K· 12.43 mi
8:43/mi
1:47:23
↑ 106↓ 860.1%
Half· 13.11 mi
8:33/mi
1:53:13
↑ 19↓ 370.5%
25K· 15.53 mi
8:43/mi
2:14:20
↑ 66↓ 880.2%
30K· 18.64 mi
9:03/mi
2:42:26
↑ 181↓ 1480.2%
20M
9:07/mi
2:54:50
↑ 64↓ 500.2%
21M
9:45/mi
3:04:35
↑ 106↓ 241.6%
35K· 21.75 mi
8:44/mi
3:11:07
↑ 17↓ 861.7%
23M
9:17/mi
3:22:45
↑ 23↓ 630.6%
24M
9:13/mi
3:31:58
↓ 821.3%
40K· 24.85 mi
9:27/mi
3:40:03
↓ 200.3%
25.2M
10:12/mi
3:43:34
↑ 13↓ 160.2%
Finish· 26.22 mi
9:02/mi
3:52:46
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:53:13
Pace8:38 /mi
2nd Half
Distance13.11 mi
Time1:59:33
Pace9:07 /mi
📊Positive Split: 5.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:47:1527:058:4327:05
8:43
-
10K
6.21 mi12:13:3953:298:3626:24
8:30
-0:13
15K
9.32 mi12:40:281:20:188:3726:49
8:38
+0:08
20K
12.43 mi13:07:331:47:238:3827:05
8:43
+0:05
Half
13.11 mi13:13:231:53:138:385:50
8:33
-0:10
25K
15.53 mi13:34:302:14:208:3921:07
8:43
+0:10
30K
18.64 mi14:02:362:42:268:4328:06
9:03
+0:20
20M
20.00 mi14:15:002:54:508:4412:24
9:07
+0:04
21M
21.00 mi14:24:453:04:358:479:45
9:45
+0:38
35K
21.75 mi14:31:173:11:078:476:32
8:44
-1:01
23M
23.00 mi14:42:553:22:458:4911:38
9:17
+0:33
24M
24.00 mi14:52:083:31:588:509:13
9:13
-0:04
40K
24.85 mi15:00:133:40:038:518:05
9:27
+0:14
25.2M
25.20 mi15:03:443:43:348:523:31
10:12
+0:45
Finish
26.22 mi15:12:563:52:468:539:12
9:02
-1:10

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

8:30 /mi

Average Pace

8:53 /mi

Slowest Pace

10:12 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:31:25

91% of race

Time at Steady Pace

17:50

8% of race

Time at Slower Pace

3:31

2% of race

Average Pace: 8:53 /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 mi11:47:1527:058:4327:05
8:43
#21089
10K
6.21 mi12:13:3953:298:3626:24
8:30
#20435
15K
9.32 mi12:40:281:20:188:3726:49
8:38
#20293
20K
12.43 mi13:07:331:47:238:3827:05
8:43
#20090
Half
13.11 mi13:13:231:53:138:385:50
8:33
#20045
25K
15.53 mi13:34:302:14:208:3921:07
8:43
#19765
30K
18.64 mi14:02:362:42:268:4328:06
9:03
#19389
20M
20.00 mi14:15:002:54:508:4412:24
9:07
#19245
21M
21.00 mi14:24:453:04:358:479:45
9:45
#19121
35K
21.75 mi14:31:173:11:078:476:32
8:44
#19035
23M
23.00 mi14:42:553:22:458:4911:38
9:17
#18962
24M
24.00 mi14:52:083:31:588:509:13
9:13
#18946
40K
24.85 mi15:00:133:40:038:518:05
9:27
#18909
25.2M
25.20 mi15:03:443:43:348:523:31
10:12
#18903
Finish
26.22 mi15:12:563:52:468:539:12
9:02
#18902
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi210898127812720100(Top 71%)7486(Top 61%)7486(Top 137%)
10K6.21 mi3.10 mi20435+6547737+3907737+39019795(Top 70%)7357(Top 60%)7357(Top 135%)
15K9.32 mi3.11 mi20293+1427638+997638+9920100(Top 71%)7486(Top 61%)7486(Top 137%)
20K12.43 mi3.11 mi20090+2037521+1177521+11719510(Top 69%)7208(Top 59%)7208(Top 132%)
Half13.11 mi0.68 mi20045+457500+217500+2119561(Top 69%)7217(Top 59%)7217(Top 132%)
25K15.53 mi2.42 mi19765+2807348+1527348+15218473(Top 65%)6696(Top 55%)6696(Top 122%)
30K18.64 mi3.11 mi19389+3767180+1687180+16817921(Top 63%)6541(Top 53%)6541(Top 120%)
20M20.00 mi1.36 mi19245+1447123+577123+5717456(Top 61%)6401(Top 52%)6401(Top 117%)
21M21.00 mi1.00 mi19121+1247065+587065+5817287(Top 61%)6427(Top 53%)6427(Top 118%)
35K21.75 mi0.75 mi19035+867042+237042+2316944(Top 60%)6314(Top 52%)6314(Top 115%)
23M23.00 mi1.25 mi18962+737028+147028+1417749(Top 62%)6866(Top 56%)6866(Top 126%)
24M24.00 mi1.00 mi18946+167044-167044-1618447(Top 65%)7276(Top 60%)7276(Top 133%)
40K24.85 mi0.85 mi18909+377049-57049-518549(Top 65%)7405(Top 61%)7405(Top 135%)
25.2M25.20 mi0.35 mi18903+67050-17050-117924(Top 63%)7102(Top 58%)7102(Top 130%)
Finish26.22 mi1.02 mi18902+17074-247074-2419208(Top 68%)7724(Top 63%)7724(Top 141%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 71%
×21story building
+97ft-345ft

Overall

20100

Females

7486

F18-39

7486

5K→10K

3.1 - 6.2 mi

Top 70%
×5story building
+79ft-138ft

Overall

19795

Females

7357

F18-39

7357

10K→15K

6.2 - 9.3 mi

Top 71%
×3story building
+67ft-78ft

Overall

20100

Females

7486

F18-39

7486

15K→20K

9.3 - 12.4 mi

Top 69%
×5story building
+106ft-86ft

Overall

19510

Females

7208

F18-39

7208

20K→Half

12.4 - 13.1 mi

Top 69%
×2story building
+19ft-37ft

Overall

19561

Females

7217

F18-39

7217

Half→25K

13.1 - 15.5 mi

Top 65%
×4story building
+66ft-88ft

Overall

18473

Females

6696

F18-39

6696

25K→30K

15.5 - 18.6 mi

Top 63%
×9story building
+181ft-148ft

Overall

17921

Females

6541

F18-39

6541

30K→20M

18.6 - 20.0 mi

Top 61%
×5story building
+64ft-50ft

Overall

17456

Females

6401

F18-39

6401

20M→21M

20.0 - 21.0 mi

Top 61%
×8story building
+106ft-24ft

Overall

17287

Females

6427

F18-39

6427

21M→35K

21.0 - 21.8 mi

Top 60%
×7story building
+17ft-86ft

Overall

16944

Females

6314

F18-39

6314

35K→23M

21.8 - 23.0 mi

Top 62%
×5story building
+23ft-63ft

Overall

17749

Females

6866

F18-39

6866

23M→24M

23.0 - 24.0 mi

Top 65%
×6story building
+12ft-82ft

Overall

18447

Females

7276

F18-39

7276

24M→40K

24.0 - 24.9 mi

Top 65%
×1story
+6ft-20ft

Overall

18549

Females

7405

F18-39

7405

40K→25.2M

24.9 - 25.2 mi

Top 63%
×1story
+13ft-16ft

Overall

17924

Females

7102

F18-39

7102

25.2M→Finish

25.2 - 26.2 mi

Top 68%
×2story building
+22ft-21ft

Overall

19208

Females

7724

F18-39

7724

Passing Analysis

Category:
Athletes Passed
2916
Passed By
729
Net Change
+2187
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21089
5K → 10K74793+654#21089#20435
10K → 15K263121+142#20435#20293
15K → 20K28178+203#20293#20090
20K → Half549+45#20090#20045
Half → 25K30929+280#20045#19765
25K → 30K43256+376#19765#19389
30K → 20M18339+144#19389#19245
20M → 21M16339+124#19245#19121
21M → 35K10216+86#19121#19035
35K → 23M12249+73#19035#18962
23M → 24M7761+16#18962#18946
24M → 40K8851+37#18946#18909
40K → 25.2M2923+6#18909#18903
25.2M → Finish6665+1#18903#18902
TOTALS2916729+2187
📊

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