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BOSTON MARATHON 2023

Nicole Szczepanek

Bib: 16042•F

IL

Masters
Boston Marathon logo
0:00
0:00
/ mi
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Overall
#0 / 26622
Top 44%
Gender (Female)
#0 / 11423
Top 26%
Masters (Masters Women)
#0 / 6539
Top 13%
Age Group (F40-44)
#0 / 1878
Top 25%
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
24:38
Rank: #13497
Start → 5K
24:38 | 7:56/mi
10K· 6.21 mi
48:41
Rank: #13025 (+472)
5K → 10K
24:03 | 7:44/mi
15K· 9.32 mi
1:12:33
Rank: #12527 (+498)
10K → 15K
23:52 | 7:41/mi
20K· 12.43 mi
1:36:24
Rank: #12024 (+503)
15K → 20K
23:51 | 7:41/mi
Half· 13.11 mi
1:41:34
Rank: #11971 (+53)
20K → Half
5:10 | 7:34/mi
25K· 15.53 mi
2:00:11
Rank: #11588 (+383)
Half → 25K
18:37 | 7:41/mi
30K· 18.64 mi
2:24:33
Rank: #11205 (+383)
25K → 30K
24:22 | 7:51/mi
20M
2:35:29
Rank: #11135 (+70)
30K → 20M
10:56 | 8:03/mi
21M
2:44:22
Rank: #11231 (-96)
20M → 21M
8:53 | 8:53/mi
35K· 21.75 mi
2:50:14
Rank: #11209 (+22)
21M → 35K
5:52 | 7:51/mi
23M
3:00:42
Rank: #11265 (-56)
35K → 23M
10:28 | 8:22/mi
24M
3:08:53
Rank: #11331 (-66)
23M → 24M
8:11 | 8:11/mi
40K· 24.85 mi
3:16:06
Rank: #11396 (-65)
24M → 40K
7:13 | 8:26/mi
25.2M
3:19:20
Rank: #11457 (-61)
40K → 25.2M
3:14 | 9:23/mi
Finish· 26.22 mi
3:28:02
Rank: #11631 (-174)
25.2M → Finish
8:42 | 8:32/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
Time1:41:34
Pace7:45 /mi
2nd Half
Distance13.11 mi
Time1:46:28
Pace8:07 /mi
📊Positive Split: 4.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:21:4124:387:5624:38
7:56
-
10K
6.21 mi11:45:4448:417:5024:03
7:44
-0:12
15K
9.32 mi12:09:361:12:337:4723:52
7:41
-0:03
20K
12.43 mi12:33:271:36:247:4523:51
7:41
0:00
Half
13.11 mi12:38:371:41:347:455:10
7:34
-0:07
25K
15.53 mi12:57:142:00:117:4418:37
7:41
+0:07
30K
18.64 mi13:21:362:24:337:4524:22
7:51
+0:10
20M
20.00 mi13:32:322:35:297:4610:56
8:03
+0:12
21M
21.00 mi13:41:252:44:227:508:53
8:53
+0:50
35K
21.75 mi13:47:172:50:147:505:52
7:51
-1:02
23M
23.00 mi13:57:453:00:427:5110:28
8:22
+0:31
24M
24.00 mi14:05:563:08:537:528:11
8:11
-0:11
40K
24.85 mi14:13:093:16:067:537:13
8:26
+0:15
25.2M
25.20 mi14:16:233:19:207:553:14
9:23
+0:57
Finish
26.22 mi14:25:053:28:027:568:42
8:32
-0:51

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

7:34 /mi

Average Pace

7:56 /mi

Slowest Pace

9:23 /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

1:11:30

34% of race

Time at Steady Pace

1:29:51

43% of race

Time at Slower Pace

46:41

22% of race

Average Pace: 7:56 /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 mi11:21:4124:387:5624:38
7:56
#13497
10K
6.21 mi11:45:4448:417:5024:03
7:44
#13025
15K
9.32 mi12:09:361:12:337:4723:52
7:41
#12527
20K
12.43 mi12:33:271:36:247:4523:51
7:41
#12024
Half
13.11 mi12:38:371:41:347:455:10
7:34
#11971
25K
15.53 mi12:57:142:00:117:4418:37
7:41
#11588
30K
18.64 mi13:21:362:24:337:4524:22
7:51
#11205
20M
20.00 mi13:32:322:35:297:4610:56
8:03
#11135
21M
21.00 mi13:41:252:44:227:508:53
8:53
#11231
35K
21.75 mi13:47:172:50:147:505:52
7:51
#11209
23M
23.00 mi13:57:453:00:427:5110:28
8:22
#11265
24M
24.00 mi14:05:563:08:537:528:11
8:11
#11331
40K
24.85 mi14:13:093:16:067:537:13
8:26
#11396
25.2M
25.20 mi14:16:233:19:207:553:14
9:23
#11457
Finish
26.22 mi14:25:053:28:027:568:42
8:32
#11631
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 mi134973713371311718(Top 44%)2743(Top 24%)2743(Top 146%)
10K6.21 mi3.10 mi13025+4723457+2563457+25612603(Top 47%)3206(Top 28%)3206(Top 171%)
15K9.32 mi3.11 mi12527+4983190+2673190+26711718(Top 44%)2743(Top 24%)2743(Top 146%)
20K12.43 mi3.11 mi12024+5032925+2652925+26510750(Top 40%)2287(Top 20%)2287(Top 122%)
Half13.11 mi0.68 mi11971+532899+262899+2610897(Top 41%)2326(Top 20%)2326(Top 124%)
25K15.53 mi2.42 mi11588+3832690+2092690+20910159(Top 38%)2071(Top 18%)2071(Top 110%)
30K18.64 mi3.11 mi11205+3832534+1562534+1569702(Top 36%)2025(Top 18%)2025(Top 108%)
20M20.00 mi1.36 mi11135+702508+262508+2610627(Top 40%)2553(Top 22%)2553(Top 136%)
21M21.00 mi1.00 mi11231-962585-772585-7712764(Top 48%)3815(Top 33%)3815(Top 203%)
35K21.75 mi0.75 mi11209+222580+52580+511002(Top 41%)2879(Top 25%)2879(Top 153%)
23M23.00 mi1.25 mi11265-562640-602640-6012314(Top 46%)3692(Top 32%)3692(Top 197%)
24M24.00 mi1.00 mi11331-662698-582698-5812490(Top 47%)3845(Top 34%)3845(Top 205%)
40K24.85 mi0.85 mi11396-652758-602758-6012984(Top 49%)4188(Top 37%)4188(Top 223%)
25.2M25.20 mi0.35 mi11457-612804-462804-4614574(Top 55%)5040(Top 44%)5040(Top 268%)
Finish26.22 mi1.02 mi11631-1742924-1202924-12015633(Top 59%)5601(Top 49%)5601(Top 298%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 44%
×21stories
+97ft-345ft

Overall

11718

Females

2743

F40-44

2743

5K→10K

3.1 - 6.2 mi

Top 47%
×5stories
+79ft-138ft

Overall

12603

Females

3206

F40-44

3206

10K→15K

6.2 - 9.3 mi

Top 44%
×3stories
+67ft-78ft

Overall

11718

Females

2743

F40-44

2743

15K→20K

9.3 - 12.4 mi

Top 40%
×5stories
+106ft-86ft

Overall

10750

Females

2287

F40-44

2287

20K→Half

12.4 - 13.1 mi

Top 41%
×2stories
+19ft-37ft

Overall

10897

Females

2326

F40-44

2326

Half→25K

13.1 - 15.5 mi

Top 38%
×4stories
+66ft-88ft

Overall

10159

Females

2071

F40-44

2071

25K→30K

15.5 - 18.6 mi

Top 36%
×9stories
+181ft-148ft

Overall

9702

Females

2025

F40-44

2025

30K→20M

18.6 - 20.0 mi

Top 40%
×5stories
+64ft-50ft

Overall

10627

Females

2553

F40-44

2553

20M→21M

20.0 - 21.0 mi

Top 48%
×8stories
+106ft-24ft

Overall

12764

Females

3815

F40-44

3815

21M→35K

21.0 - 21.8 mi

Top 41%
×7stories
+17ft-86ft

Overall

11002

Females

2879

F40-44

2879

35K→23M

21.8 - 23.0 mi

Top 46%
×5stories
+23ft-63ft

Overall

12314

Females

3692

F40-44

3692

23M→24M

23.0 - 24.0 mi

Top 47%
×6stories
+12ft-82ft

Overall

12490

Females

3845

F40-44

3845

24M→40K

24.0 - 24.9 mi

Top 49%
×1story
+6ft-20ft

Overall

12984

Females

4188

F40-44

4188

40K→25.2M

24.9 - 25.2 mi

Top 55%
×1story
+13ft-16ft

Overall

14574

Females

5040

F40-44

5040

25.2M→Finish

25.2 - 26.2 mi

Top 59%
×2stories
+22ft-21ft

Overall

15633

Females

5601

F40-44

5601

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
2994
Passed By
1128
Net Change
+1866
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13497
5K → 10K602130+472#13497#13025
10K → 15K55355+498#13025#12527
15K → 20K52320+503#12527#12024
20K → Half618+53#12024#11971
Half → 25K39512+383#11971#11588
25K → 30K41128+383#11588#11205
30K → 20M11848+70#11205#11135
20M → 21M63159-96#11135#11231
21M → 35K5432+22#11231#11209
35K → 23M73129-56#11209#11265
23M → 24M40106-66#11265#11331
24M → 40K46111-65#11331#11396
40K → 25.2M2182-61#11396#11457
25.2M → Finish34208-174#11457#11631
TOTALS29941128+1866
📊

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