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BOSTON MARATHON 2025

Isabella Lacava

Bib: 27963•F

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 38%
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
8:36/mi
26:42
↑ 97↓ 3451.5%
10K· 6.21 mi
7:56/mi
51:20
↑ 79↓ 1380.4%
15K· 9.32 mi
7:51/mi
1:15:42
↑ 67↓ 78
20K· 12.43 mi
7:55/mi
1:40:19
↑ 106↓ 860.1%
Half· 13.11 mi
7:36/mi
1:45:30
↑ 19↓ 370.5%
25K· 15.53 mi
7:53/mi
2:04:37
↑ 66↓ 880.2%
30K· 18.64 mi
8:16/mi
2:30:17
↑ 181↓ 1480.2%
20M
8:17/mi
2:41:32
↑ 64↓ 500.2%
21M
8:44/mi
2:50:16
↑ 106↓ 241.6%
35K· 21.75 mi
8:29/mi
2:56:37
↑ 17↓ 861.7%
23M
8:39/mi
3:07:27
↑ 23↓ 630.6%
24M
8:51/mi
3:16:18
↓ 821.3%
40K· 24.85 mi
8:40/mi
3:23:43
↓ 200.3%
25.2M
9:23/mi
3:26:57
↑ 13↓ 160.2%
Finish· 26.22 mi
8:23/mi
3:35:30
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:30
Pace8:03 /mi
2nd Half
Distance13.11 mi
Time1:50:00
Pace8:23 /mi
📊Positive Split: 4.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:44:0026:428:3626:42
8:36
-
10K
6.21 mi12:08:3851:208:1624:38
7:56
-0:40
15K
9.32 mi12:33:001:15:428:0724:22
7:51
-0:05
20K
12.43 mi12:57:371:40:198:0424:37
7:55
+0:04
Half
13.11 mi13:02:481:45:308:035:11
7:36
-0:19
25K
15.53 mi13:21:552:04:378:0119:07
7:53
+0:17
30K
18.64 mi13:47:352:30:178:0425:40
8:16
+0:23
20M
20.00 mi13:58:502:41:328:0511:15
8:17
+0:01
21M
21.00 mi14:07:342:50:168:068:44
8:44
+0:27
35K
21.75 mi14:13:552:56:378:076:21
8:29
-0:15
23M
23.00 mi14:24:453:07:278:0910:50
8:39
+0:10
24M
24.00 mi14:33:363:16:188:118:51
8:51
+0:12
40K
24.85 mi14:41:013:23:438:127:25
8:40
-0:11
25.2M
25.20 mi14:44:153:26:578:133:14
9:23
+0:43
Finish
26.22 mi14:52:483:35:308:148:33
8:23
-1:00

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

7:36 /mi

Average Pace

8:14 /mi

Slowest Pace

9:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:37:55

45% of race

Time at Steady Pace

1:18:31

36% of race

Time at Slower Pace

39:04

18% of race

Average Pace: 8:13 /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 mi11:44:0026:428:3626:42
8:36
#20421
10K
6.21 mi12:08:3851:208:1624:38
7:56
#18387
15K
9.32 mi12:33:001:15:428:0724:22
7:51
#17242
20K
12.43 mi12:57:371:40:198:0424:37
7:55
#16473
Half
13.11 mi13:02:481:45:308:035:11
7:36
#16283
25K
15.53 mi13:21:552:04:378:0119:07
7:53
#15733
30K
18.64 mi13:47:352:30:178:0425:40
8:16
#15229
20M
20.00 mi13:58:502:41:328:0511:15
8:17
#14956
21M
21.00 mi14:07:342:50:168:068:44
8:44
#14725
35K
21.75 mi14:13:552:56:378:076:21
8:29
#14725
23M
23.00 mi14:24:453:07:278:0910:50
8:39
#14671
24M
24.00 mi14:33:363:16:188:118:51
8:51
#14739
40K
24.85 mi14:41:013:23:438:127:25
8:40
#14714
25.2M
25.20 mi14:44:153:26:578:133:14
9:23
#14683
Finish
26.22 mi14:52:483:35:308:148:33
8:23
#14689
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi204217753775314762(Top 52%)4454(Top 36%)4454(Top 81%)
10K6.21 mi3.10 mi18387+20346550+12036550+120315911(Top 56%)5074(Top 41%)5074(Top 93%)
15K9.32 mi3.11 mi17242+11455857+6935857+69314762(Top 52%)4454(Top 36%)4454(Top 81%)
20K12.43 mi3.11 mi16473+7695414+4435414+44314321(Top 50%)4264(Top 35%)4264(Top 78%)
Half13.11 mi0.68 mi16283+1905322+925322+9212648(Top 45%)3332(Top 27%)3332(Top 61%)
25K15.53 mi2.42 mi15733+5505015+3075015+30713015(Top 46%)3687(Top 30%)3687(Top 67%)
30K18.64 mi3.11 mi15229+5044788+2274788+22713259(Top 47%)3980(Top 33%)3980(Top 73%)
20M20.00 mi1.36 mi14956+2734671+1174671+11712377(Top 44%)3641(Top 30%)3641(Top 67%)
21M21.00 mi1.00 mi14725+2314570+1014570+10111927(Top 42%)3564(Top 29%)3564(Top 65%)
35K21.75 mi0.75 mi147254586-164586-1615406(Top 54%)5462(Top 45%)5462(Top 100%)
23M23.00 mi1.25 mi14671+544588-24588-214273(Top 50%)4945(Top 40%)4945(Top 90%)
24M24.00 mi1.00 mi14739-684654-664654-6616587(Top 58%)6249(Top 51%)6249(Top 114%)
40K24.85 mi0.85 mi14714+254671-174671-1714488(Top 51%)5233(Top 43%)5233(Top 96%)
25.2M25.20 mi0.35 mi14683+314659+124659+1213928(Top 49%)4971(Top 41%)4971(Top 91%)
Finish26.22 mi1.02 mi14689-64695-364695-3615522(Top 55%)5762(Top 47%)5762(Top 105%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 52%
×21story building
+97ft-345ft

Overall

14762

Females

4454

F18-39

4454

5K→10K

3.1 - 6.2 mi

Top 56%
×5story building
+79ft-138ft

Overall

15911

Females

5074

F18-39

5074

10K→15K

6.2 - 9.3 mi

Top 52%
×3story building
+67ft-78ft

Overall

14762

Females

4454

F18-39

4454

15K→20K

9.3 - 12.4 mi

Top 50%
×5story building
+106ft-86ft

Overall

14321

Females

4264

F18-39

4264

20K→Half

12.4 - 13.1 mi

Top 45%
×2story building
+19ft-37ft

Overall

12648

Females

3332

F18-39

3332

Half→25K

13.1 - 15.5 mi

Top 46%
×4story building
+66ft-88ft

Overall

13015

Females

3687

F18-39

3687

25K→30K

15.5 - 18.6 mi

Top 47%
×9story building
+181ft-148ft

Overall

13259

Females

3980

F18-39

3980

30K→20M

18.6 - 20.0 mi

Top 44%
×5story building
+64ft-50ft

Overall

12377

Females

3641

F18-39

3641

20M→21M

20.0 - 21.0 mi

Top 42%
×8story building
+106ft-24ft

Overall

11927

Females

3564

F18-39

3564

21M→35K

21.0 - 21.8 mi

Top 54%
×7story building
+17ft-86ft

Overall

15406

Females

5462

F18-39

5462

35K→23M

21.8 - 23.0 mi

Top 50%
×5story building
+23ft-63ft

Overall

14273

Females

4945

F18-39

4945

23M→24M

23.0 - 24.0 mi

Top 58%
×6story building
+12ft-82ft

Overall

16587

Females

6249

F18-39

6249

24M→40K

24.0 - 24.9 mi

Top 51%
×1story
+6ft-20ft

Overall

14488

Females

5233

F18-39

5233

40K→25.2M

24.9 - 25.2 mi

Top 49%
×1story
+13ft-16ft

Overall

13928

Females

4971

F18-39

4971

25.2M→Finish

25.2 - 26.2 mi

Top 55%
×2story building
+22ft-21ft

Overall

15522

Females

5762

F18-39

5762

Passing Analysis

Category:
Athletes Passed
6220
Passed By
488
Net Change
+5732
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20421
5K → 10K20373+2034#20421#18387
10K → 15K11483+1145#18387#17242
15K → 20K7723+769#17242#16473
20K → Half1900+190#16473#16283
Half → 25K5544+550#16283#15733
25K → 30K54440+504#15733#15229
30K → 20M28815+273#15229#14956
20M → 21M24413+231#14956#14725
21M → 35K64640#14725#14725
35K → 23M12470+54#14725#14671
23M → 24M54122-68#14671#14739
24M → 40K7752+25#14739#14714
40K → 25.2M5524+31#14714#14683
25.2M → Finish6975-6#14683#14689
TOTALS6220488+5732
📊

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