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BOSTON MARATHON 2023

Kayla Zwirko

Bib: 27611•F

CT

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Division (F18-39)
#0 / 4884
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
9:18/mi
28:53
↑ 97↓ 3451.5%
10K· 6.21 mi
8:43/mi
55:58
↑ 79↓ 1380.4%
15K· 9.32 mi
8:53/mi
1:23:35
↑ 67↓ 78
20K· 12.43 mi
9:00/mi
1:51:33
↑ 106↓ 860.1%
Half· 13.11 mi
9:08/mi
1:57:47
↑ 19↓ 370.5%
25K· 15.53 mi
9:14/mi
2:20:11
↑ 66↓ 880.2%
30K· 18.64 mi
10:00/mi
2:51:15
↑ 181↓ 1480.2%
20M
9:39/mi
3:04:22
↑ 64↓ 500.2%
21M
10:06/mi
3:14:28
↑ 106↓ 241.6%
35K· 21.75 mi
9:36/mi
3:21:39
↑ 17↓ 861.7%
23M
9:53/mi
3:34:02
↑ 23↓ 630.6%
24M
9:41/mi
3:43:43
↓ 821.3%
40K· 24.85 mi
10:20/mi
3:52:33
↓ 200.3%
25.2M
10:21/mi
3:56:07
↑ 13↓ 160.2%
Finish· 26.22 mi
9:13/mi
4:05:31
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:57:47
Pace8:59 /mi
2nd Half
Distance13.11 mi
Time2:07:44
Pace9:45 /mi
📊Positive Split: 8.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:50:0828:539:1828:53
9:18
-
10K
6.21 mi12:17:1355:589:0027:05
8:43
-0:35
15K
9.32 mi12:44:501:23:358:5827:37
8:53
+0:10
20K
12.43 mi13:12:481:51:338:5927:58
9:00
+0:07
Half
13.11 mi13:19:021:57:478:596:14
9:08
+0:08
25K
15.53 mi13:41:262:20:119:0122:24
9:14
+0:06
30K
18.64 mi14:12:302:51:159:1131:04
10:00
+0:46
20M
20.00 mi14:25:373:04:229:1313:07
9:39
-0:21
21M
21.00 mi14:35:433:14:289:1610:06
10:06
+0:27
35K
21.75 mi14:42:543:21:399:167:11
9:36
-0:30
23M
23.00 mi14:55:173:34:029:1812:23
9:53
+0:17
24M
24.00 mi15:04:583:43:439:199:41
9:41
-0:12
40K
24.85 mi15:13:483:52:339:218:50
10:20
+0:39
25.2M
25.20 mi15:17:223:56:079:223:34
10:21
+0:01
Finish
26.22 mi15:26:464:05:319:229:24
9:13
-1:08

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

8:43 /mi

Average Pace

9:22 /mi

Slowest Pace

10:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:29:35

61% of race

Time at Steady Pace

1:23:32

34% of race

Time at Slower Pace

12:24

5% of race

Average Pace: 9:22 /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 mi11:50:0828:539:1828:53
9:18
#21525
10K
6.21 mi12:17:1355:589:0027:05
8:43
#20678
15K
9.32 mi12:44:501:23:358:5827:37
8:53
#20426
20K
12.43 mi13:12:481:51:338:5927:58
9:00
#20254
Half
13.11 mi13:19:021:57:478:596:14
9:08
#20300
25K
15.53 mi13:41:262:20:119:0122:24
9:14
#20237
30K
18.64 mi14:12:302:51:159:1131:04
10:00
#20405
20M
20.00 mi14:25:373:04:229:1313:07
9:39
#20322
21M
21.00 mi14:35:433:14:289:1610:06
10:06
#20192
35K
21.75 mi14:42:543:21:399:167:11
9:36
#20188
23M
23.00 mi14:55:173:34:029:1812:23
9:53
#20149
24M
24.00 mi15:04:583:43:439:199:41
9:41
#20132
40K
24.85 mi15:13:483:52:339:218:50
10:20
#20173
25.2M
25.20 mi15:17:223:56:079:223:34
10:21
#20136
Finish
26.22 mi15:26:464:05:319:229:24
9:13
#20091
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi215258646864620003(Top 75%)7689(Top 67%)7689(Top 157%)
10K6.21 mi3.10 mi20678+8478135+5118135+51119529(Top 73%)7407(Top 65%)7407(Top 152%)
15K9.32 mi3.11 mi20426+2527975+1607975+16020003(Top 75%)7689(Top 67%)7689(Top 157%)
20K12.43 mi3.11 mi20254+1727867+1087867+10819718(Top 74%)7507(Top 66%)7507(Top 154%)
Half13.11 mi0.68 mi20300-467885-187885-1820968(Top 79%)8224(Top 72%)8224(Top 168%)
25K15.53 mi2.42 mi20237+637839+467839+4619991(Top 75%)7687(Top 67%)7687(Top 157%)
30K18.64 mi3.11 mi20405-1687954-1157954-11521029(Top 79%)8361(Top 73%)8361(Top 171%)
20M20.00 mi1.36 mi20322+837924+307924+3019411(Top 73%)7524(Top 66%)7524(Top 154%)
21M21.00 mi1.00 mi20192+1307859+657859+6518414(Top 69%)7012(Top 61%)7012(Top 144%)
35K21.75 mi0.75 mi20188+47869-107869-1020178(Top 76%)8035(Top 70%)8035(Top 165%)
23M23.00 mi1.25 mi20149+397853+167853+1619677(Top 74%)7784(Top 68%)7784(Top 159%)
24M24.00 mi1.00 mi20132+177849+47849+419847(Top 75%)7890(Top 69%)7890(Top 162%)
40K24.85 mi0.85 mi20173-417884-357884-3520832(Top 78%)8508(Top 74%)8508(Top 174%)
25.2M25.20 mi0.35 mi20136+377871+137871+1318657(Top 70%)7319(Top 64%)7319(Top 150%)
Finish26.22 mi1.02 mi20091+457853+187853+1819054(Top 72%)7470(Top 65%)7470(Top 153%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 75%
×21story building
+97ft-345ft

Overall

20003

Females

7689

F18-39

7689

5K→10K

3.1 - 6.2 mi

Top 73%
×5story building
+79ft-138ft

Overall

19529

Females

7407

F18-39

7407

10K→15K

6.2 - 9.3 mi

Top 75%
×3story building
+67ft-78ft

Overall

20003

Females

7689

F18-39

7689

15K→20K

9.3 - 12.4 mi

Top 74%
×5story building
+106ft-86ft

Overall

19718

Females

7507

F18-39

7507

20K→Half

12.4 - 13.1 mi

Top 79%
×2story building
+19ft-37ft

Overall

20968

Females

8224

F18-39

8224

Half→25K

13.1 - 15.5 mi

Top 75%
×4story building
+66ft-88ft

Overall

19991

Females

7687

F18-39

7687

25K→30K

15.5 - 18.6 mi

Top 79%
×9story building
+181ft-148ft

Overall

21029

Females

8361

F18-39

8361

30K→20M

18.6 - 20.0 mi

Top 73%
×5story building
+64ft-50ft

Overall

19411

Females

7524

F18-39

7524

20M→21M

20.0 - 21.0 mi

Top 69%
×8story building
+106ft-24ft

Overall

18414

Females

7012

F18-39

7012

21M→35K

21.0 - 21.8 mi

Top 76%
×7story building
+17ft-86ft

Overall

20178

Females

8035

F18-39

8035

35K→23M

21.8 - 23.0 mi

Top 74%
×5story building
+23ft-63ft

Overall

19677

Females

7784

F18-39

7784

23M→24M

23.0 - 24.0 mi

Top 75%
×6story building
+12ft-82ft

Overall

19847

Females

7890

F18-39

7890

24M→40K

24.0 - 24.9 mi

Top 78%
×1story
+6ft-20ft

Overall

20832

Females

8508

F18-39

8508

40K→25.2M

24.9 - 25.2 mi

Top 70%
×1story
+13ft-16ft

Overall

18657

Females

7319

F18-39

7319

25.2M→Finish

25.2 - 26.2 mi

Top 72%
×2story building
+22ft-21ft

Overall

19054

Females

7470

F18-39

7470

Passing Analysis

Category:
Athletes Passed
2347
Passed By
913
Net Change
+1434
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21525
5K → 10K90154+847#21525#20678
10K → 15K32068+252#20678#20426
15K → 20K26290+172#20426#20254
20K → Half1662-46#20254#20300
Half → 25K16198+63#20300#20237
25K → 30K96264-168#20237#20405
30K → 20M12239+83#20405#20322
20M → 21M15020+130#20322#20192
21M → 35K4440+4#20192#20188
35K → 23M9354+39#20188#20149
23M → 24M5134+17#20149#20132
24M → 40K3172-41#20132#20173
40K → 25.2M414+37#20173#20136
25.2M → Finish5914+45#20136#20091
TOTALS2347913+1434
📊

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