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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing
BOSTON MARATHON 2026

Chelsea Henderson

Bib: 33641 •F •Age: N/A

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0:00
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Overall
#0 / 29021
Gender (Female)
#0 / 12578
Age Group (F18-39)
#0 / 5716
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
25:49
3.11 mi
Rank: #18929
Start → 5K
25:49 | 8:19/mi
10K
50:23
6.21 mi
Rank: #17824 (+1105)
5K → 10K
24:34 | 7:55/mi
15K
1:15:02
9.32 mi
Rank: #17428 (+396)
10K → 15K
24:39 | 7:57/mi
20K
1:40:02
12.43 mi
Rank: #17186 (+242)
15K → 20K
25:00 | 8:03/mi
HALF
1:45:30
13.11 mi
Rank: #17178 (+8)
20K → HALF
5:28 | 8:02/mi
25K
2:05:09
15.53 mi
Rank: #16970 (+208)
HALF → 25K
19:39 | 8:07/mi
30K
2:31:47
18.64 mi
Rank: #16989 (-19)
25K → 30K
26:38 | 8:35/mi
20M
2:43:30
20.00 mi
Rank: #16977 (+12)
30K → 20M
11:43 | 8:38/mi
21M
2:52:32
21.00 mi
Rank: #16909 (+68)
20M → 21M
9:02 | 9:02/mi
35K
2:58:57
21.75 mi
Rank: #16938 (-29)
21M → 35K
6:25 | 8:35/mi
23M
3:10:47
23.00 mi
Rank: #17179 (-241)
35K → 23M
11:50 | 9:28/mi
24M
3:19:37
24.00 mi
Rank: #17232 (-53)
23M → 24M
8:50 | 8:50/mi
40K
3:27:38
24.85 mi
Rank: #17345 (-113)
24M → 40K
8:01 | 9:23/mi
25.2M
3:30:57
25.20 mi
Rank: #17349 (-4)
40K → 25.2M
3:19 | 9:38/mi
FINISH
3:39:49
26.22 mi
Rank: #17432 (-83)
25.2M → FINISH
8:52 | 8:43/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:45:30
Pace8:03 /mi
2nd Half
Distance13.11 mi
Time1:54:19
Pace8:44 /mi
📊Positive Split: 8.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:53:4025:498:1925:49
8:19
-
10K
6.21 mi12:18:1450:238:0724:34
7:55
-0:24
15K
9.32 mi12:42:531:15:028:0424:39
7:57
+0:02
20K
12.43 mi13:07:531:40:028:0325:00
8:03
+0:06
HALF
13.11 mi13:13:211:45:308:035:28
8:02
-0:01
25K
15.53 mi13:33:002:05:098:0419:39
8:07
+0:05
30K
18.64 mi13:59:382:31:478:0926:38
8:35
+0:28
20M
20.00 mi14:11:212:43:308:1111:43
8:38
+0:03
21M
21.00 mi14:20:232:52:328:139:02
9:02
+0:24
35K
21.75 mi14:26:482:58:578:146:25
8:35
-0:27
23M
23.00 mi14:38:383:10:478:1811:50
9:28
+0:53
24M
24.00 mi14:47:283:19:378:208:50
8:50
-0:38
40K
24.85 mi14:55:293:27:388:228:01
9:23
+0:33
25.2M
25.20 mi14:58:483:30:578:233:19
9:38
+0:15
FINISH
26.22 mi15:07:403:39:498:248:52
8:43
-0:55

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

7:55 /mi

Average Pace

8:23 /mi

Slowest Pace

9:38 /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

1:39:20

45% of race

Time at Steady Pace

1:28:17

40% of race

Time at Slower Pace

32:12

15% of race

Average Pace: 8:23 /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 mi11:53:4025:498:1925:49
8:19
#18929
10K
6.21 mi12:18:1450:238:0724:34
7:55
#17824
15K
9.32 mi12:42:531:15:028:0424:39
7:57
#17428
20K
12.43 mi13:07:531:40:028:0325:00
8:03
#17186
HALF
13.11 mi13:13:211:45:308:035:28
8:02
#17178
25K
15.53 mi13:33:002:05:098:0419:39
8:07
#16970
30K
18.64 mi13:59:382:31:478:0926:38
8:35
#16989
20M
20.00 mi14:11:212:43:308:1111:43
8:38
#16977
21M
21.00 mi14:20:232:52:328:139:02
9:02
#16909
35K
21.75 mi14:26:482:58:578:146:25
8:35
#16938
23M
23.00 mi14:38:383:10:478:1811:50
9:28
#17179
24M
24.00 mi14:47:283:19:378:208:50
8:50
#17232
40K
24.85 mi14:55:293:27:388:228:01
9:23
#17345
25.2M
25.20 mi14:58:483:30:578:233:19
9:38
#17349
FINISH
26.22 mi15:07:403:39:498:248:52
8:43
#17432
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 mi189297043704316496(Top 57%)5620(Top 45%)5620(Top 98%)
10K6.21 mi3.10 mi17824+11056388+6556388+65516542(Top 57%)5648(Top 45%)5648(Top 99%)
15K9.32 mi3.11 mi17428+3966184+2046184+20416496(Top 57%)5620(Top 45%)5620(Top 98%)
20K12.43 mi3.11 mi17186+2426036+1486036+14816486(Top 57%)5650(Top 45%)5650(Top 99%)
HALF13.11 mi0.68 mi17178+86038-26038-217323(Top 60%)6106(Top 49%)6106(Top 107%)
25K15.53 mi2.42 mi16970+2085924+1145924+11416162(Top 56%)5522(Top 44%)5522(Top 97%)
30K18.64 mi3.11 mi16989-195955-315955-3117324(Top 60%)6298(Top 50%)6298(Top 110%)
20M20.00 mi1.36 mi16977+125962-75962-716964(Top 58%)6175(Top 49%)6175(Top 108%)
21M21.00 mi1.00 mi16909+685942+205942+2016319(Top 56%)5877(Top 47%)5877(Top 103%)
35K21.75 mi0.75 mi16938-295978-365978-3618023(Top 62%)6897(Top 55%)6897(Top 121%)
23M23.00 mi1.25 mi17179-2416140-1626140-16220470(Top 71%)8191(Top 65%)8191(Top 143%)
24M24.00 mi1.00 mi17232-536196-566196-5618704(Top 64%)7351(Top 58%)7351(Top 129%)
40K24.85 mi0.85 mi17345-1136280-846280-8419937(Top 69%)8039(Top 64%)8039(Top 141%)
25.2M25.20 mi0.35 mi17349-46293-136293-1317914(Top 62%)6977(Top 55%)6977(Top 122%)
FINISH26.22 mi1.02 mi17432-836359-666359-6619180(Top 66%)7648(Top 61%)7648(Top 134%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 57%
×21
+97ft-345ft

Overall

16496

Females

5620

F18-39

5620

5K→10K

3.1 - 6.2 mi

Top 57%
×5
+79ft-138ft

Overall

16542

Females

5648

F18-39

5648

10K→15K

6.2 - 9.3 mi

Top 57%
×3
+67ft-78ft

Overall

16496

Females

5620

F18-39

5620

15K→20K

9.3 - 12.4 mi

Top 57%
×5
+106ft-86ft

Overall

16486

Females

5650

F18-39

5650

20K→HALF

12.4 - 13.1 mi

Top 60%
×2
+19ft-37ft

Overall

17323

Females

6106

F18-39

6106

HALF→25K

13.1 - 15.5 mi

Top 56%
×4
+66ft-88ft

Overall

16162

Females

5522

F18-39

5522

25K→30K

15.5 - 18.6 mi

Top 60%
×9
+181ft-148ft

Overall

17324

Females

6298

F18-39

6298

30K→20M

18.6 - 20.0 mi

Top 58%
×5
+64ft-50ft

Overall

16964

Females

6175

F18-39

6175

20M→21M

20.0 - 21.0 mi

Top 56%
×8
+106ft-24ft

Overall

16319

Females

5877

F18-39

5877

21M→35K

21.0 - 21.8 mi

Top 62%
×7
+17ft-86ft

Overall

18023

Females

6897

F18-39

6897

35K→23M

21.8 - 23.0 mi

Top 71%
×5
+23ft-63ft

Overall

20470

Females

8191

F18-39

8191

23M→24M

23.0 - 24.0 mi

Top 64%
×6
+12ft-82ft

Overall

18704

Females

7351

F18-39

7351

24M→40K

24.0 - 24.9 mi

Top 69%
×1
+6ft-20ft

Overall

19937

Females

8039

F18-39

8039

40K→25.2M

24.9 - 25.2 mi

Top 62%
×1
+13ft-16ft

Overall

17914

Females

6977

F18-39

6977

25.2M→FINISH

25.2 - 26.2 mi

Top 66%
×2
+22ft-21ft

Overall

19180

Females

7648

F18-39

7648

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
2837*
Passed By
1240
Net Change
+1497
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18929
5K → 10K1139*34+1105#18929#17824
10K → 15K447*51+396#17824#17428
15K → 20K301*59+242#17428#17186
20K → HALF4537+8#17186#17178
HALF → 25K247*39+208#17178#16970
25K → 30K190200-19#16970#16989
30K → 20M9179+12#16989#16977
20M → 21M12052+68#16977#16909
21M → 35K4978-29#16909#16938
35K → 23M50200-241#16938#17179
23M → 24M61114-53#17179#17232
24M → 40K30143-113#17232#17345
40K → 25.2M2630-4#17345#17349
25.2M → FINISH41124-83#17349#17432
TOTALS2837*1240+1497

* 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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