Boston Marathon logo
BOSTON MARATHON 2025

Isabella Calvani

Bib: 27760•F

MA

0:00
0:00
/ mi
Be the first to cheer!
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
26:45
Rank: #20528
Start → 5K
8:37/mi
26:45 split
10K· 6.21 mi
52:48
Rank: #19837 (+691)
5K → 10K
8:23/mi
26:03 split
15K· 9.32 mi
1:21:18
Rank: #20865 (-1028)
10K → 15K
9:10/mi
28:30 split
20K· 12.43 mi
1:51:49
Rank: #21925 (-1060)
15K → 20K
9:49/mi
30:31 split
Half· 13.11 mi
1:58:12
Rank: #22000 (-75)
20K → Half
9:21/mi
6:23 split
25K· 15.53 mi
2:22:09
Rank: #22249 (-249)
Half → 25K
9:53/mi
23:57 split
30K· 18.64 mi
2:51:51
Rank: #21848 (+401)
25K → 30K
9:34/mi
29:42 split
20M
3:05:15
Rank: #21734 (+114)
30K → 20M
9:52/mi
13:24 split
21M
3:15:36
Rank: #21592 (+142)
20M → 21M
10:21/mi
10:21 split
35K· 21.75 mi
3:22:43
Rank: #21548 (+44)
21M → 35K
9:31/mi
7:07 split
23M
3:35:38
Rank: #21530 (+18)
35K → 23M
10:19/mi
12:55 split
24M
3:45:32
Rank: #21504 (+26)
23M → 24M
9:54/mi
9:54 split
40K· 24.85 mi
3:53:58
Rank: #21436 (+68)
24M → 40K
9:52/mi
8:26 split
25.2M
3:57:48
Rank: #21417 (+19)
40K → 25.2M
11:07/mi
3:50 split
Finish· 26.22 mi
4:06:58
Rank: #21339 (+78)
25.2M → Finish
9:00/mi
9:10 split

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:58:12
Pace9:01 /mi
2nd Half
Distance13.11 mi
Time2:08:46
Pace9:49 /mi
📊Positive Split: 8.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:44:0526:458:3726:45
8:37
-
10K
6.21 mi12:10:0852:488:3026:03
8:23
-0:14
15K
9.32 mi12:38:381:21:188:4328:30
9:10
+0:47
20K
12.43 mi13:09:091:51:499:0030:31
9:49
+0:39
Half
13.11 mi13:15:321:58:129:016:23
9:21
-0:28
25K
15.53 mi13:39:292:22:099:0923:57
9:53
+0:32
30K
18.64 mi14:09:112:51:519:1329:42
9:34
-0:19
20M
20.00 mi14:22:353:05:159:1613:24
9:52
+0:18
21M
21.00 mi14:32:563:15:369:1910:21
10:21
+0:29
35K
21.75 mi14:40:033:22:439:197:07
9:31
-0:50
23M
23.00 mi14:52:583:35:389:2312:55
10:19
+0:48
24M
24.00 mi15:02:523:45:329:249:54
9:54
-0:25
40K
24.85 mi15:11:183:53:589:258:26
9:52
-0:02
25.2M
25.20 mi15:15:083:57:489:263:50
11:07
+1:15
Finish
26.22 mi15:24:184:06:589:269:10
9:00
-2:07

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

8:23 /mi

Average Pace

9:26 /mi

Slowest Pace

11:07 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:36:51

39% of race

Time at Steady Pace

2:03:01

50% of race

Time at Slower Pace

27:06

11% of race

Average Pace: 9:25 /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 mi11:44:0526:458:3726:45
8:37
#20528
10K
6.21 mi12:10:0852:488:3026:03
8:23
#19837
15K
9.32 mi12:38:381:21:188:4328:30
9:10
#20865
20K
12.43 mi13:09:091:51:499:0030:31
9:49
#21925
Half
13.11 mi13:15:321:58:129:016:23
9:21
#22000
25K
15.53 mi13:39:292:22:099:0923:57
9:53
#22249
30K
18.64 mi14:09:112:51:519:1329:42
9:34
#21848
20M
20.00 mi14:22:353:05:159:1613:24
9:52
#21734
21M
21.00 mi14:32:563:15:369:1910:21
10:21
#21592
35K
21.75 mi14:40:033:22:439:197:07
9:31
#21548
23M
23.00 mi14:52:583:35:389:2312:55
10:19
#21530
24M
24.00 mi15:02:523:45:329:249:54
9:54
#21504
40K
24.85 mi15:11:183:53:589:258:26
9:52
#21436
25.2M
25.20 mi15:15:083:57:489:263:50
11:07
#21417
Finish
26.22 mi15:24:184:06:589:269:10
9:00
#21339
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi205287823782322765(Top 80%)8981(Top 73%)8981(Top 164%)
10K6.21 mi3.10 mi19837+6917378+4457378+44519108(Top 67%)6948(Top 57%)6948(Top 127%)
15K9.32 mi3.11 mi20865-10287963-5857963-58522765(Top 80%)8981(Top 73%)8981(Top 164%)
20K12.43 mi3.11 mi21925-10608563-6008563-60023825(Top 84%)9616(Top 79%)9616(Top 176%)
Half13.11 mi0.68 mi22000-758597-348597-3423139(Top 81%)9222(Top 75%)9222(Top 169%)
25K15.53 mi2.42 mi22249-2498742-1458742-14522964(Top 81%)9171(Top 75%)9171(Top 168%)
30K18.64 mi3.11 mi21848+4018537+2058537+20520194(Top 71%)7761(Top 63%)7761(Top 142%)
20M20.00 mi1.36 mi21734+1148488+498488+4920503(Top 72%)8080(Top 66%)8080(Top 148%)
21M21.00 mi1.00 mi21592+1428440+488440+4819570(Top 69%)7671(Top 63%)7671(Top 140%)
35K21.75 mi0.75 mi21548+448428+128428+1220395(Top 72%)8186(Top 67%)8186(Top 150%)
23M23.00 mi1.25 mi21530+188448-208448-2021487(Top 76%)8807(Top 72%)8807(Top 161%)
24M24.00 mi1.00 mi21504+268451-38451-321080(Top 74%)8645(Top 71%)8645(Top 158%)
40K24.85 mi0.85 mi21436+688439+128439+1220017(Top 70%)8171(Top 67%)8171(Top 149%)
25.2M25.20 mi0.35 mi21417+198441-28441-221022(Top 74%)8666(Top 71%)8666(Top 158%)
Finish26.22 mi1.02 mi21339+788409+328409+3219071(Top 67%)7650(Top 63%)7650(Top 140%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 80%
×21story building
+97ft-345ft

Overall

22765

Females

8981

F18-39

8981

5K→10K

3.1 - 6.2 mi

Top 67%
×5story building
+79ft-138ft

Overall

19108

Females

6948

F18-39

6948

10K→15K

6.2 - 9.3 mi

Top 80%
×3story building
+67ft-78ft

Overall

22765

Females

8981

F18-39

8981

15K→20K

9.3 - 12.4 mi

Top 84%
×5story building
+106ft-86ft

Overall

23825

Females

9616

F18-39

9616

20K→Half

12.4 - 13.1 mi

Top 81%
×2story building
+19ft-37ft

Overall

23139

Females

9222

F18-39

9222

Half→25K

13.1 - 15.5 mi

Top 81%
×4story building
+66ft-88ft

Overall

22964

Females

9171

F18-39

9171

25K→30K

15.5 - 18.6 mi

Top 71%
×9story building
+181ft-148ft

Overall

20194

Females

7761

F18-39

7761

30K→20M

18.6 - 20.0 mi

Top 72%
×5story building
+64ft-50ft

Overall

20503

Females

8080

F18-39

8080

20M→21M

20.0 - 21.0 mi

Top 69%
×8story building
+106ft-24ft

Overall

19570

Females

7671

F18-39

7671

21M→35K

21.0 - 21.8 mi

Top 72%
×7story building
+17ft-86ft

Overall

20395

Females

8186

F18-39

8186

35K→23M

21.8 - 23.0 mi

Top 76%
×5story building
+23ft-63ft

Overall

21487

Females

8807

F18-39

8807

23M→24M

23.0 - 24.0 mi

Top 74%
×6story building
+12ft-82ft

Overall

21080

Females

8645

F18-39

8645

24M→40K

24.0 - 24.9 mi

Top 70%
×1story
+6ft-20ft

Overall

20017

Females

8171

F18-39

8171

40K→25.2M

24.9 - 25.2 mi

Top 74%
×1story
+13ft-16ft

Overall

21022

Females

8666

F18-39

8666

25.2M→Finish

25.2 - 26.2 mi

Top 67%
×2story building
+22ft-21ft

Overall

19071

Females

7650

F18-39

7650

Passing Analysis

Category:
Athletes Passed
2133
Passed By
2944
Net Change
-811
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20528
5K → 10K77685+691#20528#19837
10K → 15K411069-1028#19837#20865
15K → 20K341094-1060#20865#21925
20K → Half1792-75#21925#22000
Half → 25K72321-249#22000#22249
25K → 30K43938+401#22249#21848
30K → 20M14531+114#21848#21734
20M → 21M16523+142#21734#21592
21M → 35K6622+44#21592#21548
35K → 23M9476+18#21548#21530
23M → 24M6943+26#21530#21504
24M → 40K9022+68#21504#21436
40K → 25.2M3516+19#21436#21417
25.2M → Finish9012+78#21417#21339
TOTALS21332944-811
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing