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BOSTON MARATHON 2025

Isabella Corsini

Bib: 31868•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
8:49/mi
27:25
↑ 97↓ 3451.5%
10K· 6.21 mi
8:32/mi
53:55
↑ 79↓ 1380.4%
15K· 9.32 mi
8:28/mi
1:20:12
↑ 67↓ 78
20K· 12.43 mi
8:37/mi
1:46:59
↑ 106↓ 860.1%
Half· 13.11 mi
8:21/mi
1:52:41
↑ 19↓ 370.5%
25K· 15.53 mi
8:45/mi
2:13:55
↑ 66↓ 880.2%
30K· 18.64 mi
9:11/mi
2:42:27
↑ 181↓ 1480.2%
20M
8:58/mi
2:54:38
↑ 64↓ 500.2%
21M
9:32/mi
3:04:10
↑ 106↓ 241.6%
35K· 21.75 mi
8:44/mi
3:10:42
↑ 17↓ 861.7%
23M
9:02/mi
3:22:00
↑ 23↓ 630.6%
24M
8:48/mi
3:30:48
↓ 821.3%
40K· 24.85 mi
9:13/mi
3:38:41
↓ 200.3%
25.2M
9:25/mi
3:41:56
↑ 13↓ 160.2%
Finish· 26.22 mi
7:46/mi
3:49:51
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:52:41
Pace8:36 /mi
2nd Half
Distance13.11 mi
Time1:57:10
Pace8:56 /mi
📊Positive Split: 4.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:4027:258:4927:25
8:49
-
10K
6.21 mi12:16:1053:558:4126:30
8:32
-0:17
15K
9.32 mi12:42:271:20:128:3626:17
8:28
-0:04
20K
12.43 mi13:09:141:46:598:3726:47
8:37
+0:09
Half
13.11 mi13:14:561:52:418:365:42
8:21
-0:16
25K
15.53 mi13:36:102:13:558:3721:14
8:45
+0:24
30K
18.64 mi14:04:422:42:278:4328:32
9:11
+0:26
20M
20.00 mi14:16:532:54:388:4412:11
8:58
-0:13
21M
21.00 mi14:26:253:04:108:469:32
9:32
+0:34
35K
21.75 mi14:32:573:10:428:466:32
8:44
-0:48
23M
23.00 mi14:44:153:22:008:4711:18
9:02
+0:18
24M
24.00 mi14:53:033:30:488:478:48
8:48
-0:14
40K
24.85 mi15:00:563:38:418:487:53
9:13
+0:25
25.2M
25.20 mi15:04:113:41:568:483:15
9:25
+0:12
Finish
26.22 mi15:12:063:49:518:467:55
7:46
-1:39

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

7:46 /mi

Average Pace

8:46 /mi

Slowest Pace

9:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:06:24

29% of race

Time at Steady Pace

1:42:57

45% of race

Time at Slower Pace

1:00:30

26% of race

Average Pace: 8:46 /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 mi11:49:4027:258:4927:25
8:49
#21644
10K
6.21 mi12:16:1053:558:4126:30
8:32
#20792
15K
9.32 mi12:42:271:20:128:3626:17
8:28
#20236
20K
12.43 mi13:09:141:46:598:3726:47
8:37
#19910
Half
13.11 mi13:14:561:52:418:365:42
8:21
#19843
25K
15.53 mi13:36:102:13:558:3721:14
8:45
#19625
30K
18.64 mi14:04:422:42:278:4328:32
9:11
#19394
20M
20.00 mi14:16:532:54:388:4412:11
8:58
#19185
21M
21.00 mi14:26:253:04:108:469:32
9:32
#19012
35K
21.75 mi14:32:573:10:428:466:32
8:44
#18928
23M
23.00 mi14:44:153:22:008:4711:18
9:02
#18774
24M
24.00 mi14:53:033:30:488:478:48
8:48
#18658
40K
24.85 mi15:00:563:38:418:487:53
9:13
#18603
25.2M
25.20 mi15:04:113:41:568:483:15
9:25
#18526
Finish
26.22 mi15:12:063:49:518:467:55
7:46
#18291
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi216448429842919103(Top 67%)6959(Top 57%)6959(Top 127%)
10K6.21 mi3.10 mi20792+8527935+4947935+49419976(Top 70%)7448(Top 61%)7448(Top 136%)
15K9.32 mi3.11 mi20236+5567603+3327603+33219103(Top 67%)6959(Top 57%)6959(Top 127%)
20K12.43 mi3.11 mi19910+3267423+1807423+18018971(Top 67%)6899(Top 56%)6899(Top 126%)
Half13.11 mi0.68 mi19843+677387+367387+3618373(Top 65%)6550(Top 54%)6550(Top 120%)
25K15.53 mi2.42 mi19625+2187273+1147273+11418722(Top 66%)6826(Top 56%)6826(Top 125%)
30K18.64 mi3.11 mi19394+2317183+907183+9018581(Top 65%)6878(Top 56%)6878(Top 126%)
20M20.00 mi1.36 mi19185+2097084+997084+9916641(Top 59%)5949(Top 49%)5949(Top 109%)
21M21.00 mi1.00 mi19012+1737012+727012+7216253(Top 57%)5849(Top 48%)5849(Top 107%)
35K21.75 mi0.75 mi18928+846985+276985+2716934(Top 60%)6304(Top 52%)6304(Top 115%)
23M23.00 mi1.25 mi18774+1546923+626923+6216431(Top 58%)6136(Top 50%)6136(Top 112%)
24M24.00 mi1.00 mi18658+1166879+446879+4416353(Top 58%)6133(Top 50%)6133(Top 112%)
40K24.85 mi0.85 mi18603+556879687917470(Top 62%)6846(Top 56%)6846(Top 125%)
25.2M25.20 mi0.35 mi18526+776850+296850+2914283(Top 50%)5203(Top 43%)5203(Top 95%)
Finish26.22 mi1.02 mi18291+2356739+1116739+11111268(Top 40%)3604(Top 29%)3604(Top 66%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 67%
×21story building
+97ft-345ft

Overall

19103

Females

6959

F18-39

6959

5K→10K

3.1 - 6.2 mi

Top 70%
×5story building
+79ft-138ft

Overall

19976

Females

7448

F18-39

7448

10K→15K

6.2 - 9.3 mi

Top 67%
×3story building
+67ft-78ft

Overall

19103

Females

6959

F18-39

6959

15K→20K

9.3 - 12.4 mi

Top 67%
×5story building
+106ft-86ft

Overall

18971

Females

6899

F18-39

6899

20K→Half

12.4 - 13.1 mi

Top 65%
×2story building
+19ft-37ft

Overall

18373

Females

6550

F18-39

6550

Half→25K

13.1 - 15.5 mi

Top 66%
×4story building
+66ft-88ft

Overall

18722

Females

6826

F18-39

6826

25K→30K

15.5 - 18.6 mi

Top 65%
×9story building
+181ft-148ft

Overall

18581

Females

6878

F18-39

6878

30K→20M

18.6 - 20.0 mi

Top 59%
×5story building
+64ft-50ft

Overall

16641

Females

5949

F18-39

5949

20M→21M

20.0 - 21.0 mi

Top 57%
×8story building
+106ft-24ft

Overall

16253

Females

5849

F18-39

5849

21M→35K

21.0 - 21.8 mi

Top 60%
×7story building
+17ft-86ft

Overall

16934

Females

6304

F18-39

6304

35K→23M

21.8 - 23.0 mi

Top 58%
×5story building
+23ft-63ft

Overall

16431

Females

6136

F18-39

6136

23M→24M

23.0 - 24.0 mi

Top 58%
×6story building
+12ft-82ft

Overall

16353

Females

6133

F18-39

6133

24M→40K

24.0 - 24.9 mi

Top 62%
×1story
+6ft-20ft

Overall

17470

Females

6846

F18-39

6846

40K→25.2M

24.9 - 25.2 mi

Top 50%
×1story
+13ft-16ft

Overall

14283

Females

5203

F18-39

5203

25.2M→Finish

25.2 - 26.2 mi

Top 40%
×2story building
+22ft-21ft

Overall

11268

Females

3604

F18-39

3604

Passing Analysis

Category:
Athletes Passed
3801
Passed By
448
Net Change
+3353
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21644
5K → 10K90654+852#21644#20792
10K → 15K58428+556#20792#20236
15K → 20K37246+326#20236#19910
20K → Half725+67#19910#19843
Half → 25K27254+218#19843#19625
25K → 30K334103+231#19625#19394
30K → 20M22920+209#19394#19185
20M → 21M19825+173#19185#19012
21M → 35K9814+84#19012#18928
35K → 23M18531+154#18928#18774
23M → 24M12913+116#18774#18658
24M → 40K9944+55#18658#18603
40K → 25.2M858+77#18603#18526
25.2M → Finish2383+235#18526#18291
TOTALS3801448+3353
📊

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