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BOSTON MARATHON 2023

Katherine Sims

Bib: 17535•F

KY

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0:00
0:00
/ mi
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Overall
#0 / 26622
Top 45%
Gender (Female)
#0 / 11423
Top 28%
Age Group (F18-39)
#0 / 4884
Top 46%
Race Day Weather
49°/39°F
light intensity drizzle

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· 3.11 mi
24:30
Rank: #13130
Start → 5K
24:30 | 7:53/mi
10K· 6.21 mi
47:28
Rank: #11258 (+1872)
5K → 10K
22:58 | 7:24/mi
15K· 9.32 mi
1:10:38
Rank: #10754 (+504)
10K → 15K
23:10 | 7:27/mi
20K· 12.43 mi
1:34:02
Rank: #10410 (+344)
15K → 20K
23:24 | 7:32/mi
Half· 13.11 mi
1:39:04
Rank: #10342 (+68)
20K → Half
5:02 | 7:23/mi
25K· 15.53 mi
1:58:00
Rank: #10456 (-114)
Half → 25K
18:56 | 7:49/mi
30K· 18.64 mi
2:23:46
Rank: #10871 (-415)
25K → 30K
25:46 | 8:18/mi
20M
2:35:35
Rank: #11186 (-315)
30K → 20M
11:49 | 8:42/mi
21M
2:45:19
Rank: #11627 (-441)
20M → 21M
9:44 | 9:44/mi
35K· 21.75 mi
2:51:36
Rank: #11776 (-149)
21M → 35K
6:17 | 8:24/mi
23M
3:02:25
Rank: #11902 (-126)
35K → 23M
10:49 | 8:38/mi
24M
3:10:50
Rank: #12003 (-101)
23M → 24M
8:25 | 8:25/mi
40K· 24.85 mi
3:18:02
Rank: #12037 (-34)
24M → 40K
7:12 | 8:25/mi
25.2M
3:21:14
Rank: #12064 (-27)
40K → 25.2M
3:12 | 9:17/mi
Finish· 26.22 mi
3:29:31
Rank: #12105 (-41)
25.2M → Finish
8:17 | 8:08/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
Time1:39:04
Pace7:33 /mi
2nd Half
Distance13.11 mi
Time1:50:27
Pace8:26 /mi
📊Positive Split: 11.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:1924:307:5324:30
7:53
-
10K
6.21 mi11:38:1747:287:3822:58
7:24
-0:29
15K
9.32 mi12:01:271:10:387:3523:10
7:27
+0:03
20K
12.43 mi12:24:511:34:027:3423:24
7:32
+0:05
Half
13.11 mi12:29:531:39:047:335:02
7:23
-0:09
25K
15.53 mi12:48:491:58:007:3618:56
7:49
+0:26
30K
18.64 mi13:14:352:23:467:4325:46
8:18
+0:29
20M
20.00 mi13:26:242:35:357:4711:49
8:42
+0:24
21M
21.00 mi13:36:082:45:197:529:44
9:44
+1:02
35K
21.75 mi13:42:252:51:367:536:17
8:24
-1:20
23M
23.00 mi13:53:143:02:257:5610:49
8:38
+0:14
24M
24.00 mi14:01:393:10:507:578:25
8:25
-0:13
40K
24.85 mi14:08:513:18:027:587:12
8:25
0:00
25.2M
25.20 mi14:12:033:21:147:593:12
9:17
+0:52
Finish
26.22 mi14:20:203:29:318:008:17
8:08
-1:09

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

7:23 /mi

Average Pace

8:00 /mi

Slowest Pace

9:44 /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

1:58:00

56% of race

Time at Steady Pace

55:57

27% of race

Time at Slower Pace

35:34

17% of race

Average Pace: 7:59 /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 mi11:15:1924:307:5324:30
7:53
#13130
10K
6.21 mi11:38:1747:287:3822:58
7:24
#11258
15K
9.32 mi12:01:271:10:387:3523:10
7:27
#10754
20K
12.43 mi12:24:511:34:027:3423:24
7:32
#10410
Half
13.11 mi12:29:531:39:047:335:02
7:23
#10342
25K
15.53 mi12:48:491:58:007:3618:56
7:49
#10456
30K
18.64 mi13:14:352:23:467:4325:46
8:18
#10871
20M
20.00 mi13:26:242:35:357:4711:49
8:42
#11186
21M
21.00 mi13:36:082:45:197:529:44
9:44
#11627
35K
21.75 mi13:42:252:51:367:536:17
8:24
#11776
23M
23.00 mi13:53:143:02:257:5610:49
8:38
#11902
24M
24.00 mi14:01:393:10:507:578:25
8:25
#12003
40K
24.85 mi14:08:513:18:027:587:12
8:25
#12037
25.2M
25.20 mi14:12:033:21:147:593:12
9:17
#12064
Finish
26.22 mi14:20:203:29:318:008:17
8:08
#12105
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 mi13130351535159855(Top 37%)1781(Top 16%)1781(Top 36%)
10K6.21 mi3.10 mi11258+18722473+10422473+10429577(Top 36%)1658(Top 15%)1658(Top 34%)
15K9.32 mi3.11 mi10754+5042210+2632210+2639855(Top 37%)1781(Top 16%)1781(Top 36%)
20K12.43 mi3.11 mi10410+3442029+1812029+1819588(Top 36%)1733(Top 15%)1733(Top 35%)
Half13.11 mi0.68 mi10342+681997+321997+329340(Top 35%)1632(Top 14%)1632(Top 33%)
25K15.53 mi2.42 mi10456-1142078-812078-8111187(Top 42%)2589(Top 23%)2589(Top 53%)
30K18.64 mi3.11 mi10871-4152333-2552333-25512990(Top 49%)3749(Top 33%)3749(Top 77%)
20M20.00 mi1.36 mi11186-3152539-2062539-20614834(Top 56%)4895(Top 43%)4895(Top 100%)
21M21.00 mi1.00 mi11627-4412807-2682807-26816976(Top 64%)6169(Top 54%)6169(Top 126%)
35K21.75 mi0.75 mi11776-1492901-942901-9414719(Top 55%)4933(Top 43%)4933(Top 101%)
23M23.00 mi1.25 mi11902-1262997-962997-9614018(Top 53%)4619(Top 40%)4619(Top 95%)
24M24.00 mi1.00 mi12003-1013080-833080-8313979(Top 53%)4653(Top 41%)4653(Top 95%)
40K24.85 mi0.85 mi12037-343123-433123-4312851(Top 48%)4124(Top 36%)4124(Top 84%)
25.2M25.20 mi0.35 mi12064-273143-203143-2014103(Top 53%)4787(Top 42%)4787(Top 98%)
Finish26.22 mi1.02 mi12105-413181-383181-3812987(Top 49%)4203(Top 37%)4203(Top 86%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 37%
×21stories
+97ft-345ft

Overall

9855

Females

1781

F18-39

1781

5K→10K

3.1 - 6.2 mi

Top 36%
×5stories
+79ft-138ft

Overall

9577

Females

1658

F18-39

1658

10K→15K

6.2 - 9.3 mi

Top 37%
×3stories
+67ft-78ft

Overall

9855

Females

1781

F18-39

1781

15K→20K

9.3 - 12.4 mi

Top 36%
×5stories
+106ft-86ft

Overall

9588

Females

1733

F18-39

1733

20K→Half

12.4 - 13.1 mi

Top 35%
×2stories
+19ft-37ft

Overall

9340

Females

1632

F18-39

1632

Half→25K

13.1 - 15.5 mi

Top 42%
×4stories
+66ft-88ft

Overall

11187

Females

2589

F18-39

2589

25K→30K

15.5 - 18.6 mi

Top 49%
×9stories
+181ft-148ft

Overall

12990

Females

3749

F18-39

3749

30K→20M

18.6 - 20.0 mi

Top 56%
×5stories
+64ft-50ft

Overall

14834

Females

4895

F18-39

4895

20M→21M

20.0 - 21.0 mi

Top 64%
×8stories
+106ft-24ft

Overall

16976

Females

6169

F18-39

6169

21M→35K

21.0 - 21.8 mi

Top 55%
×7stories
+17ft-86ft

Overall

14719

Females

4933

F18-39

4933

35K→23M

21.8 - 23.0 mi

Top 53%
×5stories
+23ft-63ft

Overall

14018

Females

4619

F18-39

4619

23M→24M

23.0 - 24.0 mi

Top 53%
×6stories
+12ft-82ft

Overall

13979

Females

4653

F18-39

4653

24M→40K

24.0 - 24.9 mi

Top 48%
×1story
+6ft-20ft

Overall

12851

Females

4124

F18-39

4124

40K→25.2M

24.9 - 25.2 mi

Top 53%
×1story
+13ft-16ft

Overall

14103

Females

4787

F18-39

4787

25.2M→Finish

25.2 - 26.2 mi

Top 49%
×2stories
+22ft-21ft

Overall

12987

Females

4203

F18-39

4203

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
3338
Passed By
2313
Net Change
+1025
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13130
5K → 10K188917+1872#13130#11258
10K → 15K53632+504#11258#10754
15K → 20K37127+344#10754#10410
20K → Half768+68#10410#10342
Half → 25K106220-114#10342#10456
25K → 30K73488-415#10456#10871
30K → 20M30345-315#10871#11186
20M → 21M14455-441#11186#11627
21M → 35K14163-149#11627#11776
35K → 23M56182-126#11776#11902
23M → 24M41142-101#11902#12003
24M → 40K5286-34#12003#12037
40K → 25.2M2552-27#12037#12064
25.2M → Finish5596-41#12064#12105
TOTALS33382313+1025
📊

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