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BOSTON MARATHON 2023

Mallory Kloucek

Bib: 19350•F

SD

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
9:14/mi
28:40
↑ 97↓ 3451.5%
10K· 6.21 mi
9:19/mi
57:36
↑ 79↓ 1380.4%
15K· 9.32 mi
9:23/mi
1:26:44
↑ 67↓ 78
20K· 12.43 mi
9:54/mi
1:57:31
↑ 106↓ 860.1%
Half· 13.11 mi
9:24/mi
2:03:56
↑ 19↓ 370.5%
25K· 15.53 mi
10:36/mi
2:29:37
↑ 66↓ 880.2%
30K· 18.64 mi
11:39/mi
3:05:50
↑ 181↓ 1480.2%
20M
11:46/mi
3:21:49
↑ 64↓ 500.2%
21M
12:06/mi
3:33:55
↑ 106↓ 241.6%
35K· 21.75 mi
11:47/mi
3:42:44
↑ 17↓ 861.7%
23M
11:28/mi
3:57:06
↑ 23↓ 630.6%
24M
11:09/mi
4:08:15
↓ 821.3%
40K· 24.85 mi
12:55/mi
4:19:18
↓ 200.3%
25.2M
13:03/mi
4:23:48
↑ 13↓ 160.2%
Finish· 26.22 mi
11:39/mi
4:35:40
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:03:56
Pace9:27 /mi
2nd Half
Distance13.11 mi
Time2:31:44
Pace11:34 /mi
📊Positive Split: 22.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:2828:409:1428:40
9:14
-
10K
6.21 mi11:49:2457:369:1628:56
9:19
+0:05
15K
9.32 mi12:18:321:26:449:1829:08
9:23
+0:04
20K
12.43 mi12:49:191:57:319:2730:47
9:54
+0:31
Half
13.11 mi12:55:442:03:569:276:25
9:24
-0:30
25K
15.53 mi13:21:252:29:379:3825:41
10:36
+1:12
30K
18.64 mi13:57:383:05:509:5836:13
11:39
+1:03
20M
20.00 mi14:13:373:21:4910:0515:59
11:46
+0:07
21M
21.00 mi14:25:433:33:5510:1112:06
12:06
+0:20
35K
21.75 mi14:34:323:42:4410:148:49
11:47
-0:19
23M
23.00 mi14:48:543:57:0610:1914:22
11:28
-0:19
24M
24.00 mi15:00:034:08:1510:2111:09
11:09
-0:19
40K
24.85 mi15:11:064:19:1810:2611:03
12:55
+1:46
25.2M
25.20 mi15:15:364:23:4810:284:30
13:03
+0:08
Finish
26.22 mi15:27:284:35:4010:3111:52
11:39
-1:24

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

9:14 /mi

Average Pace

10:31 /mi

Slowest Pace

13:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:29:37

54% of race

Time at Steady Pace

1:38:24

36% of race

Time at Slower Pace

27:39

10% of race

Average Pace: 10:31 /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 mi11:20:2828:409:1428:40
9:14
#21297
10K
6.21 mi11:49:2457:369:1628:56
9:19
#21641
15K
9.32 mi12:18:321:26:449:1829:08
9:23
#21716
20K
12.43 mi12:49:191:57:319:2730:47
9:54
#21973
Half
13.11 mi12:55:442:03:569:276:25
9:24
#21956
25K
15.53 mi13:21:252:29:379:3825:41
10:36
#22295
30K
18.64 mi13:57:383:05:509:5836:13
11:39
#22742
20M
20.00 mi14:13:373:21:4910:0515:59
11:46
#22828
21M
21.00 mi14:25:433:33:5510:1112:06
12:06
#22855
35K
21.75 mi14:34:323:42:4410:148:49
11:47
#22923
23M
23.00 mi14:48:543:57:0610:1914:22
11:28
#22937
24M
24.00 mi15:00:034:08:1510:2111:09
11:09
#22944
40K
24.85 mi15:11:064:19:1810:2611:03
12:55
#23063
25.2M
25.20 mi15:15:364:23:4810:284:30
13:03
#23089
Finish
26.22 mi15:27:284:35:4010:3111:52
11:39
#23177
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi212978525852521902(Top 82%)8737(Top 76%)8737(Top 179%)
10K6.21 mi3.10 mi21641-3448660-1358660-13521981(Top 83%)8813(Top 77%)8813(Top 180%)
15K9.32 mi3.11 mi21716-758685-258685-2521902(Top 82%)8737(Top 76%)8737(Top 179%)
20K12.43 mi3.11 mi21973-2578821-1368821-13622676(Top 85%)9182(Top 80%)9182(Top 188%)
Half13.11 mi0.68 mi21956+178806+158806+1521867(Top 82%)8725(Top 76%)8725(Top 179%)
25K15.53 mi2.42 mi22295-3399003-1979003-19723345(Top 88%)9585(Top 84%)9585(Top 196%)
30K18.64 mi3.11 mi22742-4479255-2529255-25224067(Top 90%)10051(Top 88%)10051(Top 206%)
20M20.00 mi1.36 mi22828-869306-519306-5123908(Top 90%)10030(Top 88%)10030(Top 205%)
21M21.00 mi1.00 mi22855-279329-239329-2322920(Top 86%)9512(Top 83%)9512(Top 195%)
35K21.75 mi0.75 mi22923-689376-479376-4724473(Top 92%)10386(Top 91%)10386(Top 213%)
23M23.00 mi1.25 mi22937-149393-179393-1723219(Top 87%)9708(Top 85%)9708(Top 199%)
24M24.00 mi1.00 mi22944-79410-179410-1723330(Top 88%)9816(Top 86%)9816(Top 201%)
40K24.85 mi0.85 mi23063-1199475-659475-6524884(Top 93%)10618(Top 93%)10618(Top 217%)
25.2M25.20 mi0.35 mi23089-269489-149489-1424058(Top 90%)10222(Top 89%)10222(Top 209%)
Finish26.22 mi1.02 mi23177-889540-519540-5124885(Top 93%)10605(Top 93%)10605(Top 217%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 82%
×21story building
+97ft-345ft

Overall

21902

Females

8737

F18-39

8737

5K→10K

3.1 - 6.2 mi

Top 83%
×5story building
+79ft-138ft

Overall

21981

Females

8813

F18-39

8813

10K→15K

6.2 - 9.3 mi

Top 82%
×3story building
+67ft-78ft

Overall

21902

Females

8737

F18-39

8737

15K→20K

9.3 - 12.4 mi

Top 85%
×5story building
+106ft-86ft

Overall

22676

Females

9182

F18-39

9182

20K→Half

12.4 - 13.1 mi

Top 82%
×2story building
+19ft-37ft

Overall

21867

Females

8725

F18-39

8725

Half→25K

13.1 - 15.5 mi

Top 88%
×4story building
+66ft-88ft

Overall

23345

Females

9585

F18-39

9585

25K→30K

15.5 - 18.6 mi

Top 90%
×9story building
+181ft-148ft

Overall

24067

Females

10051

F18-39

10051

30K→20M

18.6 - 20.0 mi

Top 90%
×5story building
+64ft-50ft

Overall

23908

Females

10030

F18-39

10030

20M→21M

20.0 - 21.0 mi

Top 86%
×8story building
+106ft-24ft

Overall

22920

Females

9512

F18-39

9512

21M→35K

21.0 - 21.8 mi

Top 92%
×7story building
+17ft-86ft

Overall

24473

Females

10386

F18-39

10386

35K→23M

21.8 - 23.0 mi

Top 87%
×5story building
+23ft-63ft

Overall

23219

Females

9708

F18-39

9708

23M→24M

23.0 - 24.0 mi

Top 88%
×6story building
+12ft-82ft

Overall

23330

Females

9816

F18-39

9816

24M→40K

24.0 - 24.9 mi

Top 93%
×1story
+6ft-20ft

Overall

24884

Females

10618

F18-39

10618

40K→25.2M

24.9 - 25.2 mi

Top 90%
×1story
+13ft-16ft

Overall

24058

Females

10222

F18-39

10222

25.2M→Finish

25.2 - 26.2 mi

Top 93%
×2story building
+22ft-21ft

Overall

24885

Females

10605

F18-39

10605

Passing Analysis

Category:
Athletes Passed
617
Passed By
2497
Net Change
-1880
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21297
5K → 10K135479-344#21297#21641
10K → 15K133208-75#21641#21716
15K → 20K56313-257#21716#21973
20K → Half3114+17#21973#21956
Half → 25K27366-339#21956#22295
25K → 30K27474-447#22295#22742
30K → 20M39125-86#22742#22828
20M → 21M3764-27#22828#22855
21M → 35K1381-68#22855#22923
35K → 23M4054-14#22923#22937
23M → 24M4350-7#22937#22944
24M → 40K17136-119#22944#23063
40K → 25.2M531-26#23063#23089
25.2M → Finish14102-88#23089#23177
TOTALS6172497-1880
📊

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