All Results|Race Analytics|Course|Contact
BOSTON MARATHON 2026

Carrie Kerstein

Bib: 28179•F

MA

Boston Marathon logo
0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 29021
Gender (Female)
#0 / 12578
Masters (Masters Women)
#0 / 6862
Age Group (F40-44)
#0 / 1737
Race Day Weather
51°/41°F
overcast clouds

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K
29:02
3.11 mi
Rank: #23962
Start → 5K
29:02 | 9:21/mi
10K
57:08
6.21 mi
Rank: #23533 (+429)
5K → 10K
28:06 | 9:03/mi
15K
1:25:20
9.32 mi
Rank: #23392 (+141)
10K → 15K
28:12 | 9:05/mi
20K
1:53:37
12.43 mi
Rank: #23123 (+269)
15K → 20K
28:17 | 9:07/mi
HALF
1:59:49
13.11 mi
Rank: #23120 (+3)
20K → HALF
6:12 | 9:06/mi
25K
2:21:28
15.53 mi
Rank: #22742 (+378)
HALF → 25K
21:39 | 8:56/mi
30K
2:49:57
18.64 mi
Rank: #22268 (+474)
25K → 30K
28:29 | 9:11/mi
20M
3:02:28
20.00 mi
Rank: #22081 (+187)
30K → 20M
12:31 | 9:13/mi
21M
3:12:12
21.00 mi
Rank: #21913 (+168)
20M → 21M
9:44 | 9:44/mi
35K
3:18:57
21.75 mi
Rank: #21840 (+73)
21M → 35K
6:45 | 9:02/mi
23M
3:30:22
23.00 mi
Rank: #21707 (+133)
35K → 23M
11:25 | 9:08/mi
24M
3:39:21
24.00 mi
Rank: #21638 (+69)
23M → 24M
8:59 | 8:59/mi
40K
3:47:24
24.85 mi
Rank: #21592 (+46)
24M → 40K
8:03 | 9:25/mi
25.2M
3:50:51
25.20 mi
Rank: #21566 (+26)
40K → 25.2M
3:27 | 10:01/mi
FINISH
3:59:44
26.22 mi
Rank: #21519 (+47)
25.2M → FINISH
8:53 | 8:44/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st Half⚖️ Balanced
via HALF
Distance13.11 mi
Time1:59:49
Pace9:09 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:59:55
Pace9:09 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:0729:029:2129:02
9:21
-
10K
6.21 mi12:19:1357:089:1228:06
9:03
-0:18
15K
9.32 mi12:47:251:25:209:1028:12
9:05
+0:02
20K
12.43 mi13:15:421:53:379:0928:17
9:07
+0:02
HALF
13.11 mi13:21:541:59:499:096:12
9:06
-0:01
25K
15.53 mi13:43:332:21:289:0721:39
8:56
-0:10
30K
18.64 mi14:12:022:49:579:0828:29
9:11
+0:15
20M
20.00 mi14:24:333:02:289:0812:31
9:13
+0:02
21M
21.00 mi14:34:173:12:129:109:44
9:44
+0:31
35K
21.75 mi14:41:023:18:579:096:45
9:02
-0:42
23M
23.00 mi14:52:273:30:229:0911:25
9:08
+0:06
24M
24.00 mi15:01:263:39:219:098:59
8:59
-0:09
40K
24.85 mi15:09:293:47:249:098:03
9:25
+0:26
25.2M
25.20 mi15:12:563:50:519:103:27
10:01
+0:36
FINISH
26.22 mi15:21:493:59:449:108:53
8:44
-1:17

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

📈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

8:44 /mi

Average Pace

9:09 /mi

Slowest Pace

10:01 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

3:46:33

95% of race

Time at Steady Pace

13:11

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:09 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:51:0729:029:2129:02
9:21
#23962
10K
6.21 mi12:19:1357:089:1228:06
9:03
#23533
15K
9.32 mi12:47:251:25:209:1028:12
9:05
#23392
20K
12.43 mi13:15:421:53:379:0928:17
9:07
#23123
HALF
13.11 mi13:21:541:59:499:096:12
9:06
#23120
25K
15.53 mi13:43:332:21:289:0721:39
8:56
#22742
30K
18.64 mi14:12:022:49:579:0828:29
9:11
#22268
20M
20.00 mi14:24:333:02:289:0812:31
9:13
#22081
21M
21.00 mi14:34:173:12:129:109:44
9:44
#21913
35K
21.75 mi14:41:023:18:579:096:45
9:02
#21840
23M
23.00 mi14:52:273:30:229:0911:25
9:08
#21707
24M
24.00 mi15:01:263:39:219:098:59
8:59
#21638
40K
24.85 mi15:09:293:47:249:098:03
9:25
#21592
25.2M
25.20 mi15:12:563:50:519:103:27
10:01
#21566
FINISH
26.22 mi15:21:493:59:449:108:53
8:44
#21519
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi239629643964323040(Top 79%)9163(Top 73%)9163(Top 528%)
10K6.21 mi3.10 mi23533+4299430+2139430+21323021(Top 79%)9168(Top 73%)9168(Top 528%)
15K9.32 mi3.11 mi23392+1419354+769354+7623040(Top 79%)9163(Top 73%)9163(Top 528%)
20K12.43 mi3.11 mi23123+2699230+1249230+12422375(Top 77%)8847(Top 70%)8847(Top 509%)
HALF13.11 mi0.68 mi23120+39229+19229+123131(Top 80%)9222(Top 73%)9222(Top 531%)
25K15.53 mi2.42 mi22742+3789039+1909039+19020851(Top 72%)8093(Top 64%)8093(Top 466%)
30K18.64 mi3.11 mi22268+4748818+2218818+22120384(Top 70%)7943(Top 63%)7943(Top 457%)
20M20.00 mi1.36 mi22081+1878737+818737+8119948(Top 69%)7794(Top 62%)7794(Top 449%)
21M21.00 mi1.00 mi21913+1688669+688669+6819535(Top 67%)7610(Top 61%)7610(Top 438%)
35K21.75 mi0.75 mi21840+738640+298640+2920153(Top 69%)8025(Top 64%)8025(Top 462%)
23M23.00 mi1.25 mi21707+1338584+568584+5619109(Top 66%)7535(Top 60%)7535(Top 434%)
24M24.00 mi1.00 mi21638+698555+298555+2919421(Top 67%)7743(Top 62%)7743(Top 446%)
40K24.85 mi0.85 mi21592+468544+118544+1120096(Top 69%)8121(Top 65%)8121(Top 468%)
25.2M25.20 mi0.35 mi21566+268534+108534+1019497(Top 67%)7830(Top 62%)7830(Top 451%)
FINISH26.22 mi1.02 mi21519+478511+238511+2319278(Top 66%)7704(Top 61%)7704(Top 444%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 79%
×21
+97ft-345ft

Overall

23040

Females

9163

F40-44

9163

5K→10K

3.1 - 6.2 mi

Top 79%
×5
+79ft-138ft

Overall

23021

Females

9168

F40-44

9168

10K→15K

6.2 - 9.3 mi

Top 79%
×3
+67ft-78ft

Overall

23040

Females

9163

F40-44

9163

15K→20K

9.3 - 12.4 mi

Top 77%
×5
+106ft-86ft

Overall

22375

Females

8847

F40-44

8847

20K→HALF

12.4 - 13.1 mi

Top 80%
×2
+19ft-37ft

Overall

23131

Females

9222

F40-44

9222

HALF→25K

13.1 - 15.5 mi

Top 72%
×4
+66ft-88ft

Overall

20851

Females

8093

F40-44

8093

25K→30K

15.5 - 18.6 mi

Top 70%
×9
+181ft-148ft

Overall

20384

Females

7943

F40-44

7943

30K→20M

18.6 - 20.0 mi

Top 69%
×5
+64ft-50ft

Overall

19948

Females

7794

F40-44

7794

20M→21M

20.0 - 21.0 mi

Top 67%
×8
+106ft-24ft

Overall

19535

Females

7610

F40-44

7610

21M→35K

21.0 - 21.8 mi

Top 69%
×7
+17ft-86ft

Overall

20153

Females

8025

F40-44

8025

35K→23M

21.8 - 23.0 mi

Top 66%
×5
+23ft-63ft

Overall

19109

Females

7535

F40-44

7535

23M→24M

23.0 - 24.0 mi

Top 67%
×6
+12ft-82ft

Overall

19421

Females

7743

F40-44

7743

24M→40K

24.0 - 24.9 mi

Top 69%
×1
+6ft-20ft

Overall

20096

Females

8121

F40-44

8121

40K→25.2M

24.9 - 25.2 mi

Top 67%
×1
+13ft-16ft

Overall

19497

Females

7830

F40-44

7830

25.2M→FINISH

25.2 - 26.2 mi

Top 66%
×2
+22ft-21ft

Overall

19278

Females

7704

F40-44

7704

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
2834*
Passed By
391
Net Change
+2443
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23962
5K → 10K506*77+429#23962#23533
10K → 15K234*93+141#23533#23392
15K → 20K312*43+269#23392#23123
20K → HALF2825+3#23123#23120
HALF → 25K385*7+378#23120#22742
25K → 30K488*14+474#22742#22268
30K → 20M19811+187#22268#22081
20M → 21M17810+168#22081#21913
21M → 35K818+73#21913#21840
35K → 23M15219+133#21840#21707
23M → 24M9223+69#21707#21638
24M → 40K7630+46#21638#21592
40K → 25.2M315+26#21592#21566
25.2M → FINISH7326+47#21566#21519
TOTALS2834*391+2443

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

📈Position Graph

Loading...

🎨Heatmap Timeline

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Qualifying & Age Grade

See how your performance stacks up against qualifying standards

OTQ

Olympic Trials Qualifying analysis available

Activity Data

Upload your GPX file to see detailed activity metrics

Upload your GPX file

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

.gpx files up to 10MB

Export & Support

Download your data, get help, and share your feedback

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