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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing
BOSTON MARATHON 2026

Chelsea Cook

Bib: 19215 •F •Age: N/A

NH

Boston Marathon logo
0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Top 50%
Gender (Female)
#0 / 12578
Top 37%
Masters (Masters Women)
#0 / 6862
Top 21%
Age Group (F40-44)
#0 / 1737
Top 44%
Race Day Weather
51°/41°F
overcast clouds
Personalized for Chelsea

Your Race Performance Report is ready

See how your race unfolded, where your performance changed, and what to focus on next.

Personalized by MyRace AI
Preview insight
Your pace by distance
Fastest segment · 7:31/mi at mile 3.1

Your report includes

  • Race Overview
  • Pacing & Splits
  • Performance Analysis
  • Segment Analysis
  • Passing Analysis
  • Potential Focus Areas
One-time purchase · Instant access · Downloadable PDF · Shareable report

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
23:20
3.11 mi
Rank: #12879
Start → 5K
23:20 | 7:31/mi
10K
47:19
6.21 mi
Rank: #13876 (-997)
5K → 10K
23:59 | 7:44/mi
15K
1:11:17
9.32 mi
Rank: #14078 (-202)
10K → 15K
23:58 | 7:43/mi
20K
1:35:19
12.43 mi
Rank: #14041 (+37)
15K → 20K
24:02 | 7:45/mi
HALF
1:40:35
13.11 mi
Rank: #14073 (-32)
20K → HALF
5:16 | 7:44/mi
25K
2:00:06
15.53 mi
Rank: #14344 (-271)
HALF → 25K
19:31 | 8:03/mi
30K
2:25:05
18.64 mi
Rank: #14229 (+115)
25K → 30K
24:59 | 8:03/mi
20M
2:36:20
20.00 mi
Rank: #14235 (-6)
30K → 20M
11:15 | 8:17/mi
21M
2:45:13
21.00 mi
Rank: #14289 (-54)
20M → 21M
8:53 | 8:53/mi
35K
2:50:59
21.75 mi
Rank: #14208 (+81)
21M → 35K
5:46 | 7:43/mi
23M
3:01:42
23.00 mi
Rank: #14323 (-115)
35K → 23M
10:43 | 8:34/mi
24M
3:09:51
24.00 mi
Rank: #14334 (-11)
23M → 24M
8:09 | 8:09/mi
40K
3:17:06
24.85 mi
Rank: #14401 (-67)
24M → 40K
7:15 | 8:29/mi
25.2M
3:20:19
25.20 mi
Rank: #14431 (-30)
40K → 25.2M
3:13 | 9:20/mi
FINISH
3:28:29
26.22 mi
Rank: #14489 (-58)
25.2M → FINISH
8:10 | 8:01/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:40:35
Pace7:41 /mi
2nd Half
Distance13.11 mi
Time1:47:54
Pace8:14 /mi
📊Positive Split: 7.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:06:5023:207:3123:20
7:31
-
10K
6.21 mi11:30:4947:197:3723:59
7:44
+0:13
15K
9.32 mi11:54:471:11:177:3923:58
7:43
-0:01
20K
12.43 mi12:18:491:35:197:4124:02
7:45
+0:02
HALF
13.11 mi12:24:051:40:357:415:16
7:44
-0:01
25K
15.53 mi12:43:362:00:067:4419:31
8:03
+0:19
30K
18.64 mi13:08:352:25:057:4724:59
8:03
0:00
20M
20.00 mi13:19:502:36:207:5011:15
8:17
+0:14
21M
21.00 mi13:28:432:45:137:538:53
8:53
+0:36
35K
21.75 mi13:34:292:50:597:525:46
7:43
-1:10
23M
23.00 mi13:45:123:01:427:5510:43
8:34
+0:51
24M
24.00 mi13:53:213:09:517:558:09
8:09
-0:25
40K
24.85 mi14:00:363:17:067:567:15
8:29
+0:20
25.2M
25.20 mi14:03:493:20:197:573:13
9:20
+0:51
FINISH
26.22 mi14:11:593:28:297:588:10
8:01
-1:19

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

7:31 /mi

Average Pace

7:57 /mi

Slowest Pace

9:20 /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

1:46:21

51% of race

Time at Steady Pace

1:12:04

35% of race

Time at Slower Pace

30:04

14% of race

Average Pace: 7:57 /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 mi11:06:5023:207:3123:20
7:31
#12879
10K
6.21 mi11:30:4947:197:3723:59
7:44
#13876
15K
9.32 mi11:54:471:11:177:3923:58
7:43
#14078
20K
12.43 mi12:18:491:35:197:4124:02
7:45
#14041
HALF
13.11 mi12:24:051:40:357:415:16
7:44
#14073
25K
15.53 mi12:43:362:00:067:4419:31
8:03
#14344
30K
18.64 mi13:08:352:25:057:4724:59
8:03
#14229
20M
20.00 mi13:19:502:36:207:5011:15
8:17
#14235
21M
21.00 mi13:28:432:45:137:538:53
8:53
#14289
35K
21.75 mi13:34:292:50:597:525:46
7:43
#14208
23M
23.00 mi13:45:123:01:427:5510:43
8:34
#14323
24M
24.00 mi13:53:213:09:517:558:09
8:09
#14334
40K
24.85 mi14:00:363:17:067:567:15
8:29
#14401
25.2M
25.20 mi14:03:493:20:197:573:13
9:20
#14431
FINISH
26.22 mi14:11:593:28:297:588:10
8:01
#14489
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 mi128793422342214665(Top 51%)4542(Top 36%)4542(Top 261%)
10K6.21 mi3.10 mi13876-9974020-5984020-59814946(Top 52%)4668(Top 37%)4668(Top 269%)
15K9.32 mi3.11 mi14078-2024173-1534173-15314665(Top 51%)4542(Top 36%)4542(Top 261%)
20K12.43 mi3.11 mi14041+374170+34170+314041(Top 48%)4246(Top 34%)4246(Top 244%)
HALF13.11 mi0.68 mi14073-324190-204190-2015009(Top 52%)4730(Top 38%)4730(Top 272%)
25K15.53 mi2.42 mi14344-2714370-1804370-18015768(Top 54%)5283(Top 42%)5283(Top 304%)
30K18.64 mi3.11 mi14229+1154347+234347+2313807(Top 48%)4295(Top 34%)4295(Top 247%)
20M20.00 mi1.36 mi14235-64366-194366-1914824(Top 51%)4946(Top 39%)4946(Top 285%)
21M21.00 mi1.00 mi14289-544412-464412-4615485(Top 53%)5401(Top 43%)5401(Top 311%)
35K21.75 mi0.75 mi14208+814390+224390+2212451(Top 43%)3801(Top 30%)3801(Top 219%)
23M23.00 mi1.25 mi14323-1154491-1014491-10116089(Top 55%)5889(Top 47%)5889(Top 339%)
24M24.00 mi1.00 mi14334-114523-324523-3214763(Top 51%)5199(Top 41%)5199(Top 299%)
40K24.85 mi0.85 mi14401-674585-624585-6215557(Top 54%)5703(Top 45%)5703(Top 328%)
25.2M25.20 mi0.35 mi14431-304614-294614-2916506(Top 57%)6224(Top 49%)6224(Top 358%)
FINISH26.22 mi1.02 mi14489-584662-484662-4815268(Top 53%)5565(Top 44%)5565(Top 320%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 51%
×21
+97ft-345ft

Overall

14665

Females

4542

F40-44

4542

5K→10K

3.1 - 6.2 mi

Top 52%
×5
+79ft-138ft

Overall

14946

Females

4668

F40-44

4668

10K→15K

6.2 - 9.3 mi

Top 51%
×3
+67ft-78ft

Overall

14665

Females

4542

F40-44

4542

15K→20K

9.3 - 12.4 mi

Top 48%
×5
+106ft-86ft

Overall

14041

Females

4246

F40-44

4246

20K→HALF

12.4 - 13.1 mi

Top 52%
×2
+19ft-37ft

Overall

15009

Females

4730

F40-44

4730

HALF→25K

13.1 - 15.5 mi

Top 54%
×4
+66ft-88ft

Overall

15768

Females

5283

F40-44

5283

25K→30K

15.5 - 18.6 mi

Top 48%
×9
+181ft-148ft

Overall

13807

Females

4295

F40-44

4295

30K→20M

18.6 - 20.0 mi

Top 51%
×5
+64ft-50ft

Overall

14824

Females

4946

F40-44

4946

20M→21M

20.0 - 21.0 mi

Top 53%
×8
+106ft-24ft

Overall

15485

Females

5401

F40-44

5401

21M→35K

21.0 - 21.8 mi

Top 43%
×7
+17ft-86ft

Overall

12451

Females

3801

F40-44

3801

35K→23M

21.8 - 23.0 mi

Top 55%
×5
+23ft-63ft

Overall

16089

Females

5889

F40-44

5889

23M→24M

23.0 - 24.0 mi

Top 51%
×6
+12ft-82ft

Overall

14763

Females

5199

F40-44

5199

24M→40K

24.0 - 24.9 mi

Top 54%
×1
+6ft-20ft

Overall

15557

Females

5703

F40-44

5703

40K→25.2M

24.9 - 25.2 mi

Top 57%
×1
+13ft-16ft

Overall

16506

Females

6224

F40-44

6224

25.2M→FINISH

25.2 - 26.2 mi

Top 53%
×2
+22ft-21ft

Overall

15268

Females

5565

F40-44

5565

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1251*
Passed By
1719
Net Change
-1610
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12879
5K → 10K55200-997#12879#13876
10K → 15K141200-202#13876#14078
15K → 20K177140+37#14078#14041
20K → HALF2759-32#14041#14073
HALF → 25K76200-271#14073#14344
25K → 30K240*125+115#14344#14229
30K → 20M99105-6#14229#14235
20M → 21M81135-54#14235#14289
21M → 35K9514+81#14289#14208
35K → 23M65180-115#14208#14323
23M → 24M6778-11#14323#14334
24M → 40K51118-67#14334#14401
40K → 25.2M2555-30#14401#14431
25.2M → FINISH52110-58#14431#14489
TOTALS1251*1719-1610

* 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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Export & Support

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