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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing
BOSTON MARATHON 2026

Kelsey Chamberlin

Bib: 17265 •F •Age: N/A

NC

Boston Marathon logo
0:00
0:00
/ mi
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Overall
#0 / 29021
Top 34%
Gender (Female)
#0 / 12578
Top 17%
Age Group (F18-39)
#0 / 5716
Top 31%
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
22:26
3.11 mi
Rank: #10374
Start → 5K
22:26 | 7:14/mi
10K
44:44
6.21 mi
Rank: #10202 (+172)
5K → 10K
22:18 | 7:11/mi
15K
1:06:54
9.32 mi
Rank: #9936 (+266)
10K → 15K
22:10 | 7:09/mi
20K
1:29:19
12.43 mi
Rank: #9784 (+152)
15K → 20K
22:25 | 7:13/mi
HALF
1:34:06
13.11 mi
Rank: #9715 (+69)
20K → HALF
4:47 | 7:02/mi
25K
1:51:53
15.53 mi
Rank: #9720 (-5)
HALF → 25K
17:47 | 7:20/mi
30K
2:15:28
18.64 mi
Rank: #9786 (-66)
25K → 30K
23:35 | 7:36/mi
20M
2:26:18
20.00 mi
Rank: #9971 (-185)
30K → 20M
10:50 | 7:59/mi
21M
2:34:15
21.00 mi
Rank: #9906 (+65)
20M → 21M
7:57 | 7:57/mi
35K
2:39:52
21.75 mi
Rank: #9910 (-4)
21M → 35K
5:37 | 7:31/mi
23M
2:49:37
23.00 mi
Rank: #9931 (-21)
35K → 23M
9:45 | 7:48/mi
24M
2:57:09
24.00 mi
Rank: #9932 (-1)
23M → 24M
7:32 | 7:32/mi
40K
3:03:39
24.85 mi
Rank: #9904 (+28)
24M → 40K
6:30 | 7:37/mi
25.2M
3:06:28
25.20 mi
Rank: #9885 (+19)
40K → 25.2M
2:49 | 8:11/mi
FINISH
3:13:42
26.22 mi
Rank: #9774 (+111)
25.2M → FINISH
7:14 | 7:06/mi
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Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:34:06
Pace7:11 /mi
2nd Half
Distance13.11 mi
Time1:39:36
Pace7:36 /mi
📊Positive Split: 5.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:04:0522:267:1422:26
7:14
-
10K
6.21 mi11:26:2344:447:1222:18
7:11
-0:03
15K
9.32 mi11:48:331:06:547:1122:10
7:09
-0:02
20K
12.43 mi12:10:581:29:197:1222:25
7:13
+0:04
HALF
13.11 mi12:15:451:34:067:114:47
7:02
-0:11
25K
15.53 mi12:33:321:51:537:1317:47
7:20
+0:18
30K
18.64 mi12:57:072:15:287:1723:35
7:36
+0:16
20M
20.00 mi13:07:572:26:187:1910:50
7:59
+0:23
21M
21.00 mi13:15:542:34:157:217:57
7:57
-0:02
35K
21.75 mi13:21:312:39:527:225:37
7:31
-0:26
23M
23.00 mi13:31:162:49:377:239:45
7:48
+0:17
24M
24.00 mi13:38:482:57:097:237:32
7:32
-0:16
40K
24.85 mi13:45:183:03:397:246:30
7:37
+0:05
25.2M
25.20 mi13:48:073:06:287:242:49
8:11
+0:34
FINISH
26.22 mi13:55:213:13:427:247:14
7:06
-1:05

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

7:02 /mi

Average Pace

7:24 /mi

Slowest Pace

8:11 /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

2:42:21

84% of race

Time at Steady Pace

31:21

16% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:23 /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 mi11:04:0522:267:1422:26
7:14
#10374
10K
6.21 mi11:26:2344:447:1222:18
7:11
#10202
15K
9.32 mi11:48:331:06:547:1122:10
7:09
#9936
20K
12.43 mi12:10:581:29:197:1222:25
7:13
#9784
HALF
13.11 mi12:15:451:34:067:114:47
7:02
#9715
25K
15.53 mi12:33:321:51:537:1317:47
7:20
#9720
30K
18.64 mi12:57:072:15:287:1723:35
7:36
#9786
20M
20.00 mi13:07:572:26:187:1910:50
7:59
#9971
21M
21.00 mi13:15:542:34:157:217:57
7:57
#9906
35K
21.75 mi13:21:312:39:527:225:37
7:31
#9910
23M
23.00 mi13:31:162:49:377:239:45
7:48
#9931
24M
24.00 mi13:38:482:57:097:237:32
7:32
#9932
40K
24.85 mi13:45:183:03:397:246:30
7:37
#9904
25.2M
25.20 mi13:48:073:06:287:242:49
8:11
#9885
FINISH
26.22 mi13:55:213:13:427:247:14
7:06
#9774
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi10374206820689576(Top 33%)1745(Top 14%)1745(Top 31%)
10K6.21 mi3.10 mi10202+1721997+711997+7110089(Top 35%)1952(Top 16%)1952(Top 34%)
15K9.32 mi3.11 mi9936+2661878+1191878+1199576(Top 33%)1745(Top 14%)1745(Top 31%)
20K12.43 mi3.11 mi9784+1521838+401838+409491(Top 33%)1795(Top 14%)1795(Top 31%)
HALF13.11 mi0.68 mi9715+691803+351803+358896(Top 31%)1481(Top 12%)1481(Top 26%)
25K15.53 mi2.42 mi9720-51837-341837-3410004(Top 34%)2127(Top 17%)2127(Top 37%)
30K18.64 mi3.11 mi9786-661927-901927-9010362(Top 36%)2446(Top 19%)2446(Top 43%)
20M20.00 mi1.36 mi9971-1852044-1172044-11712661(Top 44%)3747(Top 30%)3747(Top 66%)
21M21.00 mi1.00 mi9906+652037+72037+79571(Top 33%)2290(Top 18%)2290(Top 40%)
35K21.75 mi0.75 mi9910-42059-222059-2210938(Top 38%)2951(Top 23%)2951(Top 52%)
23M23.00 mi1.25 mi9931-212102-432102-4310965(Top 38%)3084(Top 25%)3084(Top 54%)
24M24.00 mi1.00 mi9932-12127-252127-2510355(Top 36%)2838(Top 23%)2838(Top 50%)
40K24.85 mi0.85 mi9904+282144-172144-179619(Top 33%)2564(Top 20%)2564(Top 45%)
25.2M25.20 mi0.35 mi9885+192147-32147-39433(Top 33%)2550(Top 20%)2550(Top 45%)
FINISH26.22 mi1.02 mi9774+1112123+242123+248375(Top 29%)2089(Top 17%)2089(Top 37%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 33%
×21
+97ft-345ft

Overall

9576

Females

1745

F18-39

1745

5K→10K

3.1 - 6.2 mi

Top 35%
×5
+79ft-138ft

Overall

10089

Females

1952

F18-39

1952

10K→15K

6.2 - 9.3 mi

Top 33%
×3
+67ft-78ft

Overall

9576

Females

1745

F18-39

1745

15K→20K

9.3 - 12.4 mi

Top 33%
×5
+106ft-86ft

Overall

9491

Females

1795

F18-39

1795

20K→HALF

12.4 - 13.1 mi

Top 31%
×2
+19ft-37ft

Overall

8896

Females

1481

F18-39

1481

HALF→25K

13.1 - 15.5 mi

Top 34%
×4
+66ft-88ft

Overall

10004

Females

2127

F18-39

2127

25K→30K

15.5 - 18.6 mi

Top 36%
×9
+181ft-148ft

Overall

10362

Females

2446

F18-39

2446

30K→20M

18.6 - 20.0 mi

Top 44%
×5
+64ft-50ft

Overall

12661

Females

3747

F18-39

3747

20M→21M

20.0 - 21.0 mi

Top 33%
×8
+106ft-24ft

Overall

9571

Females

2290

F18-39

2290

21M→35K

21.0 - 21.8 mi

Top 38%
×7
+17ft-86ft

Overall

10938

Females

2951

F18-39

2951

35K→23M

21.8 - 23.0 mi

Top 38%
×5
+23ft-63ft

Overall

10965

Females

3084

F18-39

3084

23M→24M

23.0 - 24.0 mi

Top 36%
×6
+12ft-82ft

Overall

10355

Females

2838

F18-39

2838

24M→40K

24.0 - 24.9 mi

Top 33%
×1
+6ft-20ft

Overall

9619

Females

2564

F18-39

2564

40K→25.2M

24.9 - 25.2 mi

Top 33%
×1
+13ft-16ft

Overall

9433

Females

2550

F18-39

2550

25.2M→FINISH

25.2 - 26.2 mi

Top 29%
×2
+22ft-21ft

Overall

8375

Females

2089

F18-39

2089

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1910*
Passed By
1258
Net Change
+600
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10374
5K → 10K325*153+172#10374#10202
10K → 15K337*71+266#10202#9936
15K → 20K240*88+152#9936#9784
20K → HALF756+69#9784#9715
HALF → 25K114119-5#9715#9720
25K → 30K153200-66#9720#9786
30K → 20M46200-185#9786#9971
20M → 21M10843+65#9971#9906
21M → 35K6165-4#9906#9910
35K → 23M111132-21#9910#9931
23M → 24M7474-1#9931#9932
24M → 40K8860+28#9932#9904
40K → 25.2M3617+19#9904#9885
25.2M → FINISH14230+111#9885#9774
TOTALS1910*1258+600

* 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

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🎨Heatmap Timeline

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Qualifying & Age Grade

See how your performance stacks up against qualifying standards

OTQ

Olympic Trials Qualifying analysis available

Activity Data

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