Boston Marathon logo
BOSTON MARATHON 2025

Kristen Carsello

Bib: 29997•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
27:44
Rank: #22117
Start → 5K
27:44 | 8:56/mi
10K· 6.21 mi
54:57
Rank: #21681 (+436)
5K → 10K
27:13 | 8:46/mi
15K· 9.32 mi
1:22:16
Rank: #21412 (+269)
10K → 15K
27:19 | 8:48/mi
20K· 12.43 mi
1:49:46
Rank: #21085 (+327)
15K → 20K
27:30 | 8:51/mi
Half· 13.11 mi
1:55:40
Rank: #21050 (+35)
20K → Half
5:54 | 8:39/mi
25K· 15.53 mi
2:17:05
Rank: #20736 (+314)
Half → 25K
21:25 | 8:50/mi
30K· 18.64 mi
2:45:42
Rank: #20327 (+409)
25K → 30K
28:37 | 9:13/mi
20M
2:58:21
Rank: #20161 (+166)
30K → 20M
12:39 | 9:19/mi
21M
3:07:50
Rank: #19925 (+236)
20M → 21M
9:29 | 9:29/mi
35K· 21.75 mi
3:14:43
Rank: #19891 (+34)
21M → 35K
6:53 | 9:12/mi
23M
3:26:10
Rank: #19718 (+173)
35K → 23M
11:27 | 9:09/mi
24M
3:35:13
Rank: #19635 (+83)
23M → 24M
9:03 | 9:03/mi
40K· 24.85 mi
3:43:16
Rank: #19585 (+50)
24M → 40K
8:03 | 9:25/mi
25.2M
3:46:39
Rank: #19531 (+54)
40K → 25.2M
3:23 | 9:49/mi
Finish· 26.22 mi
3:55:35
Rank: #19466 (+65)
25.2M → Finish
8:56 | 8:46/mi

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
Time1:55:40
Pace8:49 /mi
2nd Half
Distance13.11 mi
Time1:59:55
Pace9:09 /mi
📊Positive Split: 3.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:50:0227:448:5627:44
8:56
-
10K
6.21 mi12:17:1554:578:5127:13
8:46
-0:10
15K
9.32 mi12:44:341:22:168:5027:19
8:48
+0:02
20K
12.43 mi13:12:041:49:468:5027:30
8:51
+0:03
Half
13.11 mi13:17:581:55:408:495:54
8:39
-0:12
25K
15.53 mi13:39:232:17:058:4921:25
8:50
+0:11
30K
18.64 mi14:08:002:45:428:5328:37
9:13
+0:23
20M
20.00 mi14:20:392:58:218:5512:39
9:19
+0:06
21M
21.00 mi14:30:083:07:508:579:29
9:29
+0:10
35K
21.75 mi14:37:013:14:438:576:53
9:12
-0:17
23M
23.00 mi14:48:283:26:108:5811:27
9:09
-0:03
24M
24.00 mi14:57:313:35:138:589:03
9:03
-0:06
40K
24.85 mi15:05:343:43:168:598:03
9:25
+0:22
25.2M
25.20 mi15:08:573:46:399:003:23
9:49
+0:24
Finish
26.22 mi15:17:533:55:359:008:56
8:46
-1:03

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

8:39 /mi

Average Pace

9:00 /mi

Slowest Pace

9:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:52:12

99% of race

Time at Steady Pace

3:23

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:59 /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 mi11:50:0227:448:5627:44
8:56
#22117
10K
6.21 mi12:17:1554:578:5127:13
8:46
#21681
15K
9.32 mi12:44:341:22:168:5027:19
8:48
#21412
20K
12.43 mi13:12:041:49:468:5027:30
8:51
#21085
Half
13.11 mi13:17:581:55:408:495:54
8:39
#21050
25K
15.53 mi13:39:232:17:058:4921:25
8:50
#20736
30K
18.64 mi14:08:002:45:428:5328:37
9:13
#20327
20M
20.00 mi14:20:392:58:218:5512:39
9:19
#20161
21M
21.00 mi14:30:083:07:508:579:29
9:29
#19925
35K
21.75 mi14:37:013:14:438:576:53
9:12
#19891
23M
23.00 mi14:48:283:26:108:5811:27
9:09
#19718
24M
24.00 mi14:57:313:35:138:589:03
9:03
#19635
40K
24.85 mi15:05:343:43:168:598:03
9:25
#19585
25.2M
25.20 mi15:08:573:46:399:003:23
9:49
#19531
Finish
26.22 mi15:17:533:55:359:008:56
8:46
#19466
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi221178691869120994(Top 74%)7998(Top 65%)7998(Top 146%)
10K6.21 mi3.10 mi21681+4368431+2608431+26021212(Top 75%)8146(Top 67%)8146(Top 149%)
15K9.32 mi3.11 mi21412+2698256+1758256+17520994(Top 74%)7998(Top 65%)7998(Top 146%)
20K12.43 mi3.11 mi21085+3278077+1798077+17920227(Top 71%)7604(Top 62%)7604(Top 139%)
Half13.11 mi0.68 mi21050+358057+208057+2020089(Top 71%)7529(Top 62%)7529(Top 138%)
25K15.53 mi2.42 mi20736+3147896+1617896+16119123(Top 67%)7043(Top 58%)7043(Top 129%)
30K18.64 mi3.11 mi20327+4097716+1807716+18018694(Top 66%)6950(Top 57%)6950(Top 127%)
20M20.00 mi1.36 mi20161+1667645+717645+7118354(Top 65%)6927(Top 57%)6927(Top 127%)
21M21.00 mi1.00 mi19925+2367529+1167529+11616034(Top 56%)5730(Top 47%)5730(Top 105%)
35K21.75 mi0.75 mi19891+347522+77522+719193(Top 68%)7553(Top 62%)7553(Top 138%)
23M23.00 mi1.25 mi19718+1737463+597463+5917108(Top 60%)6518(Top 53%)6518(Top 119%)
24M24.00 mi1.00 mi19635+837446+177446+1717642(Top 62%)6847(Top 56%)6847(Top 125%)
40K24.85 mi0.85 mi19585+507428+187428+1818373(Top 65%)7322(Top 60%)7322(Top 134%)
25.2M25.20 mi0.35 mi19531+547413+157413+1516241(Top 57%)6226(Top 51%)6226(Top 114%)
Finish26.22 mi1.02 mi19466+657391+227391+2217897(Top 63%)7032(Top 58%)7032(Top 129%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 74%
×21stories
+97ft-345ft

Overall

20994

Females

7998

F18-39

7998

5K→10K

3.1 - 6.2 mi

Top 75%
×5stories
+79ft-138ft

Overall

21212

Females

8146

F18-39

8146

10K→15K

6.2 - 9.3 mi

Top 74%
×3stories
+67ft-78ft

Overall

20994

Females

7998

F18-39

7998

15K→20K

9.3 - 12.4 mi

Top 71%
×5stories
+106ft-86ft

Overall

20227

Females

7604

F18-39

7604

20K→Half

12.4 - 13.1 mi

Top 71%
×2stories
+19ft-37ft

Overall

20089

Females

7529

F18-39

7529

Half→25K

13.1 - 15.5 mi

Top 67%
×4stories
+66ft-88ft

Overall

19123

Females

7043

F18-39

7043

25K→30K

15.5 - 18.6 mi

Top 66%
×9stories
+181ft-148ft

Overall

18694

Females

6950

F18-39

6950

30K→20M

18.6 - 20.0 mi

Top 65%
×5stories
+64ft-50ft

Overall

18354

Females

6927

F18-39

6927

20M→21M

20.0 - 21.0 mi

Top 56%
×8stories
+106ft-24ft

Overall

16034

Females

5730

F18-39

5730

21M→35K

21.0 - 21.8 mi

Top 68%
×7stories
+17ft-86ft

Overall

19193

Females

7553

F18-39

7553

35K→23M

21.8 - 23.0 mi

Top 60%
×5stories
+23ft-63ft

Overall

17108

Females

6518

F18-39

6518

23M→24M

23.0 - 24.0 mi

Top 62%
×6stories
+12ft-82ft

Overall

17642

Females

6847

F18-39

6847

24M→40K

24.0 - 24.9 mi

Top 65%
×1story
+6ft-20ft

Overall

18373

Females

7322

F18-39

7322

40K→25.2M

24.9 - 25.2 mi

Top 57%
×1story
+13ft-16ft

Overall

16241

Females

6226

F18-39

6226

25.2M→Finish

25.2 - 26.2 mi

Top 63%
×2stories
+22ft-21ft

Overall

17897

Females

7032

F18-39

7032

Passing Analysis

Category:
Athletes Passed
3141
Passed By
490
Net Change
+2651
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22117
5K → 10K539103+436#22117#21681
10K → 15K370101+269#21681#21412
15K → 20K37750+327#21412#21085
20K → Half5116+35#21085#21050
Half → 25K33218+314#21050#20736
25K → 30K44435+409#20736#20327
30K → 20M18418+166#20327#20161
20M → 21M2404+236#20161#19925
21M → 35K6632+34#19925#19891
35K → 23M19017+173#19891#19718
23M → 24M10724+83#19718#19635
24M → 40K8232+50#19635#19585
40K → 25.2M6410+54#19585#19531
25.2M → Finish9530+65#19531#19466
TOTALS3141490+2651
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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