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BOSTON MARATHON 2026

Serena Slater

Bib: 20603•F

QC

Boston Marathon logo
0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Gender (Female)
#0 / 12578
Top 42%
Masters (Masters Women)
#0 / 6862
Top 28%
Age Group (F45-49)
#0 / 1786
Top 33%
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
23:00
3.11 mi
Rank: #11988
Start → 5K
23:00 | 7:25/mi
10K
46:22
6.21 mi
Rank: #12517 (-529)
5K → 10K
23:22 | 7:32/mi
15K
1:10:14
9.32 mi
Rank: #13098 (-581)
10K → 15K
23:52 | 7:41/mi
20K
1:34:55
12.43 mi
Rank: #13748 (-650)
15K → 20K
24:41 | 7:57/mi
HALF
1:40:08
13.11 mi
Rank: #13774 (-26)
20K → HALF
5:13 | 7:40/mi
25K
1:59:42
15.53 mi
Rank: #14114 (-340)
HALF → 25K
19:34 | 8:05/mi
30K
2:25:49
18.64 mi
Rank: #14554 (-440)
25K → 30K
26:07 | 8:25/mi
20M
2:37:29
20.00 mi
Rank: #14714 (-160)
30K → 20M
11:40 | 8:36/mi
21M
2:47:04
21.00 mi
Rank: #14990 (-276)
20M → 21M
9:35 | 9:35/mi
35K
2:53:08
21.75 mi
Rank: #14997 (-7)
21M → 35K
6:04 | 8:07/mi
23M
3:03:54
23.00 mi
Rank: #15105 (-108)
35K → 23M
10:46 | 8:37/mi
24M
3:12:25
24.00 mi
Rank: #15184 (-79)
23M → 24M
8:31 | 8:31/mi
40K
3:20:22
24.85 mi
Rank: #15418 (-234)
24M → 40K
7:57 | 9:18/mi
25.2M
3:23:35
25.20 mi
Rank: #15419 (-1)
40K → 25.2M
3:13 | 9:20/mi
FINISH
3:32:30
26.22 mi
Rank: #15619 (-200)
25.2M → FINISH
8:55 | 8:45/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:40:08
Pace7:39 /mi
2nd Half
Distance13.11 mi
Time1:52:22
Pace8:35 /mi
📊Positive Split: 12.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:07:5423:007:2523:00
7:25
-
10K
6.21 mi11:31:1646:227:2823:22
7:32
+0:07
15K
9.32 mi11:55:081:10:147:3323:52
7:41
+0:09
20K
12.43 mi12:19:491:34:557:3924:41
7:57
+0:16
HALF
13.11 mi12:25:021:40:087:395:13
7:40
-0:17
25K
15.53 mi12:44:361:59:427:4319:34
8:05
+0:25
30K
18.64 mi13:10:432:25:497:5026:07
8:25
+0:20
20M
20.00 mi13:22:232:37:297:5311:40
8:36
+0:11
21M
21.00 mi13:31:582:47:047:589:35
9:35
+0:59
35K
21.75 mi13:38:022:53:087:586:04
8:07
-1:28
23M
23.00 mi13:48:483:03:548:0010:46
8:37
+0:30
24M
24.00 mi13:57:193:12:258:028:31
8:31
-0:06
40K
24.85 mi14:05:163:20:228:047:57
9:18
+0:47
25.2M
25.20 mi14:08:293:23:358:053:13
9:20
+0:02
FINISH
26.22 mi14:17:243:32:308:078:55
8:45
-0:35

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

7:25 /mi

Average Pace

8:07 /mi

Slowest Pace

9:35 /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

1:59:42

56% of race

Time at Steady Pace

1:03:08

30% of race

Time at Slower Pace

29:40

14% of race

Average Pace: 8:06 /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 mi11:07:5423:007:2523:00
7:25
#11988
10K
6.21 mi11:31:1646:227:2823:22
7:32
#12517
15K
9.32 mi11:55:081:10:147:3323:52
7:41
#13098
20K
12.43 mi12:19:491:34:557:3924:41
7:57
#13748
HALF
13.11 mi12:25:021:40:087:395:13
7:40
#13774
25K
15.53 mi12:44:361:59:427:4319:34
8:05
#14114
30K
18.64 mi13:10:432:25:497:5026:07
8:25
#14554
20M
20.00 mi13:22:232:37:297:5311:40
8:36
#14714
21M
21.00 mi13:31:582:47:047:589:35
9:35
#14990
35K
21.75 mi13:38:022:53:087:586:04
8:07
#14997
23M
23.00 mi13:48:483:03:548:0010:46
8:37
#15105
24M
24.00 mi13:57:193:12:258:028:31
8:31
#15184
40K
24.85 mi14:05:163:20:228:047:57
9:18
#15418
25.2M
25.20 mi14:08:293:23:358:053:13
9:20
#15419
FINISH
26.22 mi14:17:243:32:308:078:55
8:45
#15619
Faster pace
Steady pace
Slower pace

Rankings

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

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi119882911291114403(Top 50%)4388(Top 35%)4388(Top 246%)
10K6.21 mi3.10 mi12517-5293236-3253236-32513147(Top 45%)3625(Top 29%)3625(Top 203%)
15K9.32 mi3.11 mi13098-5813596-3603596-36014403(Top 50%)4388(Top 35%)4388(Top 246%)
20K12.43 mi3.11 mi13748-6503996-4003996-40015718(Top 54%)5225(Top 42%)5225(Top 293%)
HALF13.11 mi0.68 mi13774-264014-184014-1814427(Top 50%)4420(Top 35%)4420(Top 247%)
25K15.53 mi2.42 mi14114-3404229-2154229-21515924(Top 55%)5382(Top 43%)5382(Top 301%)
30K18.64 mi3.11 mi14554-4404533-3044533-30416306(Top 56%)5690(Top 45%)5690(Top 319%)
20M20.00 mi1.36 mi14714-1604651-1184651-11816720(Top 58%)6043(Top 48%)6043(Top 338%)
21M21.00 mi1.00 mi14990-2764853-2024853-20218886(Top 65%)7260(Top 58%)7260(Top 406%)
35K21.75 mi0.75 mi14997-74872-194872-1915251(Top 53%)5324(Top 42%)5324(Top 298%)
23M23.00 mi1.25 mi15105-1084964-924964-9216348(Top 56%)6042(Top 48%)6042(Top 338%)
24M24.00 mi1.00 mi15184-795024-605024-6017004(Top 59%)6465(Top 51%)6465(Top 362%)
40K24.85 mi0.85 mi15418-2345186-1625186-16219670(Top 68%)7906(Top 63%)7906(Top 443%)
25.2M25.20 mi0.35 mi15419-15195-95195-916514(Top 57%)6232(Top 50%)6232(Top 349%)
FINISH26.22 mi1.02 mi15619-2005326-1315326-13119417(Top 67%)7763(Top 62%)7763(Top 435%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21
+97ft-345ft

Overall

14403

Females

4388

F45-49

4388

5K→10K

3.1 - 6.2 mi

Top 45%
×5
+79ft-138ft

Overall

13147

Females

3625

F45-49

3625

10K→15K

6.2 - 9.3 mi

Top 50%
×3
+67ft-78ft

Overall

14403

Females

4388

F45-49

4388

15K→20K

9.3 - 12.4 mi

Top 54%
×5
+106ft-86ft

Overall

15718

Females

5225

F45-49

5225

20K→HALF

12.4 - 13.1 mi

Top 50%
×2
+19ft-37ft

Overall

14427

Females

4420

F45-49

4420

HALF→25K

13.1 - 15.5 mi

Top 55%
×4
+66ft-88ft

Overall

15924

Females

5382

F45-49

5382

25K→30K

15.5 - 18.6 mi

Top 56%
×9
+181ft-148ft

Overall

16306

Females

5690

F45-49

5690

30K→20M

18.6 - 20.0 mi

Top 58%
×5
+64ft-50ft

Overall

16720

Females

6043

F45-49

6043

20M→21M

20.0 - 21.0 mi

Top 65%
×8
+106ft-24ft

Overall

18886

Females

7260

F45-49

7260

21M→35K

21.0 - 21.8 mi

Top 53%
×7
+17ft-86ft

Overall

15251

Females

5324

F45-49

5324

35K→23M

21.8 - 23.0 mi

Top 56%
×5
+23ft-63ft

Overall

16348

Females

6042

F45-49

6042

23M→24M

23.0 - 24.0 mi

Top 59%
×6
+12ft-82ft

Overall

17004

Females

6465

F45-49

6465

24M→40K

24.0 - 24.9 mi

Top 68%
×1
+6ft-20ft

Overall

19670

Females

7906

F45-49

7906

40K→25.2M

24.9 - 25.2 mi

Top 57%
×1
+13ft-16ft

Overall

16514

Females

6232

F45-49

6232

25.2M→FINISH

25.2 - 26.2 mi

Top 67%
×2
+22ft-21ft

Overall

19417

Females

7763

F45-49

7763

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
693
Passed By
2247
Net Change
-3631
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11988
5K → 10K88200-529#11988#12517
10K → 15K62200-581#12517#13098
15K → 20K37200-650#13098#13748
20K → HALF2349-26#13748#13774
HALF → 25K57200-340#13774#14114
25K → 30K84200-440#14114#14554
30K → 20M55200-160#14554#14714
20M → 21M49200-276#14714#14990
21M → 35K4956-7#14990#14997
35K → 23M69177-108#14997#15105
23M → 24M52131-79#15105#15184
24M → 40K26200-234#15184#15418
40K → 25.2M3334-1#15418#15419
25.2M → FINISH9200-200#15419#15619
TOTALS6932247-3631
📊

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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Activity Data

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing