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BOSTON MARATHON 2023

Cason Zylinski

Bib: 14129•F

FL

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 34%
Gender (Female)
#0 / 11423
Top 14%
Masters (Masters Women)
#0 / 6539
Top 6%
Division (F40-44)
#0 / 1878
Top 12%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:43/mi
23:58
↑ 97↓ 3451.5%
10K· 6.21 mi
7:27/mi
47:06
↑ 79↓ 1380.4%
15K· 9.32 mi
7:19/mi
1:09:51
↑ 67↓ 78
20K· 12.43 mi
7:25/mi
1:32:52
↑ 106↓ 860.1%
Half· 13.11 mi
7:20/mi
1:37:52
↑ 19↓ 370.5%
25K· 15.53 mi
7:32/mi
1:56:09
↑ 66↓ 880.2%
30K· 18.64 mi
7:47/mi
2:20:19
↑ 181↓ 1480.2%
20M
7:46/mi
2:30:52
↑ 64↓ 500.2%
21M
8:17/mi
2:39:09
↑ 106↓ 241.6%
35K· 21.75 mi
7:21/mi
2:44:39
↑ 17↓ 861.7%
23M
7:46/mi
2:54:22
↑ 23↓ 630.6%
24M
7:40/mi
3:02:02
↓ 821.3%
40K· 24.85 mi
7:43/mi
3:08:38
↓ 200.3%
25.2M
8:19/mi
3:11:30
↑ 13↓ 160.2%
Finish· 26.22 mi
7:40/mi
3:19:19
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:37:52
Pace7:28 /mi
2nd Half
Distance13.11 mi
Time1:41:27
Pace7:44 /mi
📊Positive Split: 3.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:2323:587:4323:58
7:43
-
10K
6.21 mi11:16:3147:067:3523:08
7:27
-0:16
15K
9.32 mi11:39:161:09:517:3022:45
7:19
-0:08
20K
12.43 mi12:02:171:32:527:2823:01
7:25
+0:06
Half
13.11 mi12:07:171:37:527:285:00
7:20
-0:05
25K
15.53 mi12:25:341:56:097:2918:17
7:32
+0:12
30K
18.64 mi12:49:442:20:197:3224:10
7:47
+0:15
20M
20.00 mi13:00:172:30:527:3310:33
7:46
-0:01
21M
21.00 mi13:08:342:39:097:358:17
8:17
+0:31
35K
21.75 mi13:14:042:44:397:345:30
7:21
-0:56
23M
23.00 mi13:23:472:54:227:359:43
7:46
+0:25
24M
24.00 mi13:31:273:02:027:357:40
7:40
-0:06
40K
24.85 mi13:38:033:08:387:356:36
7:43
+0:03
25.2M
25.20 mi13:40:553:11:307:362:52
8:19
+0:36
Finish
26.22 mi13:48:443:19:197:367:49
7:40
-0:39

Checkpoints & Pacing

📈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

7:19 /mi

Average Pace

7:36 /mi

Slowest Pace

8:19 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:08:10

94% of race

Time at Steady Pace

11:09

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:36 /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

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:53:2323:587:4323:58
7:43
#11577
10K
6.21 mi11:16:3147:067:3523:08
7:27
#10747
15K
9.32 mi11:39:161:09:517:3022:45
7:19
#9988
20K
12.43 mi12:02:171:32:527:2823:01
7:25
#9597
Half
13.11 mi12:07:171:37:527:285:00
7:20
#9556
25K
15.53 mi12:25:341:56:097:2918:17
7:32
#9458
30K
18.64 mi12:49:442:20:197:3224:10
7:47
#9374
20M
20.00 mi13:00:172:30:527:3310:33
7:46
#9297
21M
21.00 mi13:08:342:39:097:358:17
8:17
#9259
35K
21.75 mi13:14:042:44:397:345:30
7:21
#9170
23M
23.00 mi13:23:472:54:227:359:43
7:46
#9093
24M
24.00 mi13:31:273:02:027:357:40
7:40
#9056
40K
24.85 mi13:38:033:08:387:356:36
7:43
#9002
25.2M
25.20 mi13:40:553:11:307:362:52
8:19
#8977
Finish
26.22 mi13:48:443:19:197:367:49
7:40
#8983
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi11577262326238760(Top 33%)1350(Top 12%)1350(Top 72%)
10K6.21 mi3.10 mi10747+8302198+4252198+42510040(Top 38%)1842(Top 16%)1842(Top 98%)
15K9.32 mi3.11 mi9988+7591820+3781820+3788760(Top 33%)1350(Top 12%)1350(Top 72%)
20K12.43 mi3.11 mi9597+3911667+1531667+1538590(Top 32%)1333(Top 12%)1333(Top 71%)
Half13.11 mi0.68 mi9556+411650+171650+178894(Top 33%)1444(Top 13%)1444(Top 77%)
25K15.53 mi2.42 mi9458+981630+201630+209100(Top 34%)1593(Top 14%)1593(Top 85%)
30K18.64 mi3.11 mi9374+841640-101640-109206(Top 35%)1798(Top 16%)1798(Top 96%)
20M20.00 mi1.36 mi9297+771633+71633+78606(Top 32%)1639(Top 14%)1639(Top 87%)
21M21.00 mi1.00 mi9259+381638-51638-59152(Top 34%)1984(Top 17%)1984(Top 106%)
35K21.75 mi0.75 mi9170+891617+211617+217530(Top 28%)1322(Top 12%)1322(Top 70%)
23M23.00 mi1.25 mi9093+771612+51612+58167(Top 31%)1657(Top 15%)1657(Top 88%)
24M24.00 mi1.00 mi9056+371614-21614-28873(Top 33%)2035(Top 18%)2035(Top 108%)
40K24.85 mi0.85 mi9002+541613+11613+18127(Top 31%)1791(Top 16%)1791(Top 95%)
25.2M25.20 mi0.35 mi8977+251609+41609+48438(Top 32%)1989(Top 17%)1989(Top 106%)
Finish26.22 mi1.02 mi8983-61636-271636-279796(Top 37%)2601(Top 23%)2601(Top 138%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 33%
×21story building
+97ft-345ft

Overall

8760

Females

1350

F40-44

1350

5K→10K

3.1 - 6.2 mi

Top 38%
×5story building
+79ft-138ft

Overall

10040

Females

1842

F40-44

1842

10K→15K

6.2 - 9.3 mi

Top 33%
×3story building
+67ft-78ft

Overall

8760

Females

1350

F40-44

1350

15K→20K

9.3 - 12.4 mi

Top 32%
×5story building
+106ft-86ft

Overall

8590

Females

1333

F40-44

1333

20K→Half

12.4 - 13.1 mi

Top 33%
×2story building
+19ft-37ft

Overall

8894

Females

1444

F40-44

1444

Half→25K

13.1 - 15.5 mi

Top 34%
×4story building
+66ft-88ft

Overall

9100

Females

1593

F40-44

1593

25K→30K

15.5 - 18.6 mi

Top 35%
×9story building
+181ft-148ft

Overall

9206

Females

1798

F40-44

1798

30K→20M

18.6 - 20.0 mi

Top 32%
×5story building
+64ft-50ft

Overall

8606

Females

1639

F40-44

1639

20M→21M

20.0 - 21.0 mi

Top 34%
×8story building
+106ft-24ft

Overall

9152

Females

1984

F40-44

1984

21M→35K

21.0 - 21.8 mi

Top 28%
×7story building
+17ft-86ft

Overall

7530

Females

1322

F40-44

1322

35K→23M

21.8 - 23.0 mi

Top 31%
×5story building
+23ft-63ft

Overall

8167

Females

1657

F40-44

1657

23M→24M

23.0 - 24.0 mi

Top 33%
×6story building
+12ft-82ft

Overall

8873

Females

2035

F40-44

2035

24M→40K

24.0 - 24.9 mi

Top 31%
×1story
+6ft-20ft

Overall

8127

Females

1791

F40-44

1791

40K→25.2M

24.9 - 25.2 mi

Top 32%
×1story
+13ft-16ft

Overall

8438

Females

1989

F40-44

1989

25.2M→Finish

25.2 - 26.2 mi

Top 37%
×2story building
+22ft-21ft

Overall

9796

Females

2601

F40-44

2601

Passing Analysis

Category:
Athletes Passed
3191*
Passed By
597
Net Change
+2594
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11577
5K → 10K89161+830#11577#10747
10K → 15K769*10+759#10747#9988
15K → 20K414*23+391#9988#9597
20K → Half5110+41#9597#9556
Half → 25K16163+98#9556#9458
25K → 30K218*134+84#9458#9374
30K → 20M11639+77#9374#9297
20M → 21M10365+38#9297#9259
21M → 35K945+89#9259#9170
35K → 23M12043+77#9170#9093
23M → 24M7740+37#9093#9056
24M → 40K7925+54#9056#9002
40K → 25.2M4318+25#9002#8977
25.2M → Finish5561-6#8977#8983
TOTALS3191*597+2594

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing