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BOSTON MARATHON 2023

Katherine Kowalchek

Bib: 25358•F

MA

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
32:16
Rank: #24443
Start → 5K
32:16 | 10:23/mi
10K· 6.21 mi
1:01:31
Rank: #23385 (+1058)
5K → 10K
29:15 | 9:25/mi
15K· 9.32 mi
1:30:33
Rank: #22929 (+456)
10K → 15K
29:02 | 9:21/mi
20K· 12.43 mi
2:00:15
Rank: #22624 (+305)
15K → 20K
29:42 | 9:34/mi
Half· 13.11 mi
2:06:44
Rank: #22597 (+27)
20K → Half
6:29 | 9:30/mi
25K· 15.53 mi
2:30:10
Rank: #22388 (+209)
Half → 25K
23:26 | 9:40/mi
30K· 18.64 mi
3:02:53
Rank: #22361 (+27)
25K → 30K
32:43 | 10:32/mi
20M
3:18:05
Rank: #22414 (-53)
30K → 20M
15:12 | 11:11/mi
21M
3:29:28
Rank: #22365 (+49)
20M → 21M
11:23 | 11:23/mi
35K· 21.75 mi
3:41:50
Rank: #22850 (-485)
21M → 35K
12:22 | 16:32/mi
23M
3:55:41
Rank: #22810 (+40)
35K → 23M
13:51 | 11:04/mi
24M
4:06:33
Rank: #22801 (+9)
23M → 24M
10:52 | 10:52/mi
40K· 24.85 mi
4:16:42
Rank: #22841 (-40)
24M → 40K
10:09 | 11:52/mi
25.2M
4:20:42
Rank: #22827 (+14)
40K → 25.2M
4:00 | 11:36/mi
Finish· 26.22 mi
4:30:48
Rank: #22798 (+29)
25.2M → Finish
10:06 | 9:55/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:06:44
Pace9:40 /mi
2nd Half
Distance13.11 mi
Time2:24:04
Pace10:59 /mi
📊Positive Split: 13.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:52:2132:1610:2332:16
10:23
-
10K
6.21 mi12:21:361:01:319:5429:15
9:25
-0:58
15K
9.32 mi12:50:381:30:339:4329:02
9:21
-0:04
20K
12.43 mi13:20:202:00:159:4129:42
9:34
+0:13
Half
13.11 mi13:26:492:06:449:406:29
9:30
-0:04
25K
15.53 mi13:50:152:30:109:4023:26
9:40
+0:10
30K
18.64 mi14:22:583:02:539:4932:43
10:32
+0:52
20M
20.00 mi14:38:103:18:059:5415:12
11:11
+0:39
21M
21.00 mi14:49:333:29:289:5811:23
11:23
+0:12
35K
21.75 mi15:01:553:41:5010:1212:22
16:32
+5:09
23M
23.00 mi15:15:463:55:4110:1513:51
11:04
-5:28
24M
24.00 mi15:26:384:06:3310:1610:52
10:52
-0:12
40K
24.85 mi15:36:474:16:4210:2010:09
11:52
+1:00
25.2M
25.20 mi15:40:474:20:4210:214:00
11:36
-0:16
Finish
26.22 mi15:50:534:30:4810:2010:06
9:55
-1:41

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

9:21 /mi

Average Pace

10:20 /mi

Slowest Pace

16:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:57:54

44% of race

Time at Steady Pace

2:06:23

47% of race

Time at Slower Pace

26:31

10% of race

Average Pace: 10:20 /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 mi11:52:2132:1610:2332:16
10:23
#24443
10K
6.21 mi12:21:361:01:319:5429:15
9:25
#23385
15K
9.32 mi12:50:381:30:339:4329:02
9:21
#22929
20K
12.43 mi13:20:202:00:159:4129:42
9:34
#22624
Half
13.11 mi13:26:492:06:449:406:29
9:30
#22597
25K
15.53 mi13:50:152:30:109:4023:26
9:40
#22388
30K
18.64 mi14:22:583:02:539:4932:43
10:32
#22361
20M
20.00 mi14:38:103:18:059:5415:12
11:11
#22414
21M
21.00 mi14:49:333:29:289:5811:23
11:23
#22365
35K
21.75 mi15:01:553:41:5010:1212:22
16:32
#22850
23M
23.00 mi15:15:463:55:4110:1513:51
11:04
#22810
24M
24.00 mi15:26:384:06:3310:1610:52
10:52
#22801
40K
24.85 mi15:36:474:16:4210:2010:09
11:52
#22841
25.2M
25.20 mi15:40:474:20:4210:214:00
11:36
#22827
Finish
26.22 mi15:50:534:30:4810:2010:06
9:55
#22798
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi24443101231012321799(Top 82%)8673(Top 76%)8673(Top 462%)
10K6.21 mi3.10 mi23385+10589563+5609563+56022259(Top 84%)8957(Top 78%)8957(Top 477%)
15K9.32 mi3.11 mi22929+4569317+2469317+24621799(Top 82%)8673(Top 76%)8673(Top 462%)
20K12.43 mi3.11 mi22624+3059147+1709147+17021738(Top 82%)8649(Top 76%)8649(Top 461%)
Half13.11 mi0.68 mi22597+279139+89139+822140(Top 83%)8864(Top 78%)8864(Top 472%)
25K15.53 mi2.42 mi22388+2099047+929047+9221353(Top 80%)8472(Top 74%)8472(Top 451%)
30K18.64 mi3.11 mi22361+279043+49043+422271(Top 84%)9057(Top 79%)9057(Top 482%)
20M20.00 mi1.36 mi22414-539083-409083-4022998(Top 86%)9510(Top 83%)9510(Top 506%)
21M21.00 mi1.00 mi22365+499068+159068+1521673(Top 81%)8819(Top 77%)8819(Top 470%)
35K21.75 mi0.75 mi22850-4859334-2669334-26626551(Top 100%)11394(Top 100%)11394(Top 607%)
23M23.00 mi1.25 mi22810+409331+39331+322456(Top 84%)9298(Top 81%)9298(Top 495%)
24M24.00 mi1.00 mi22801+99333-29333-222788(Top 86%)9518(Top 83%)9518(Top 507%)
40K24.85 mi0.85 mi22841-409358-259358-2523722(Top 89%)10050(Top 88%)10050(Top 535%)
25.2M25.20 mi0.35 mi22827+149352+69352+621793(Top 82%)9018(Top 79%)9018(Top 480%)
Finish26.22 mi1.02 mi22798+299340+129340+1221532(Top 81%)8867(Top 78%)8867(Top 472%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 82%
×21stories
+97ft-345ft

Overall

21799

Females

8673

F40-44

8673

5K→10K

3.1 - 6.2 mi

Top 84%
×5stories
+79ft-138ft

Overall

22259

Females

8957

F40-44

8957

10K→15K

6.2 - 9.3 mi

Top 82%
×3stories
+67ft-78ft

Overall

21799

Females

8673

F40-44

8673

15K→20K

9.3 - 12.4 mi

Top 82%
×5stories
+106ft-86ft

Overall

21738

Females

8649

F40-44

8649

20K→Half

12.4 - 13.1 mi

Top 83%
×2stories
+19ft-37ft

Overall

22140

Females

8864

F40-44

8864

Half→25K

13.1 - 15.5 mi

Top 80%
×4stories
+66ft-88ft

Overall

21353

Females

8472

F40-44

8472

25K→30K

15.5 - 18.6 mi

Top 84%
×9stories
+181ft-148ft

Overall

22271

Females

9057

F40-44

9057

30K→20M

18.6 - 20.0 mi

Top 86%
×5stories
+64ft-50ft

Overall

22998

Females

9510

F40-44

9510

20M→21M

20.0 - 21.0 mi

Top 81%
×8stories
+106ft-24ft

Overall

21673

Females

8819

F40-44

8819

21M→35K

21.0 - 21.8 mi

Top 100%
×7stories
+17ft-86ft

Overall

26551

Females

11394

F40-44

11394

35K→23M

21.8 - 23.0 mi

Top 84%
×5stories
+23ft-63ft

Overall

22456

Females

9298

F40-44

9298

23M→24M

23.0 - 24.0 mi

Top 86%
×6stories
+12ft-82ft

Overall

22788

Females

9518

F40-44

9518

24M→40K

24.0 - 24.9 mi

Top 89%
×1story
+6ft-20ft

Overall

23722

Females

10050

F40-44

10050

40K→25.2M

24.9 - 25.2 mi

Top 82%
×1story
+13ft-16ft

Overall

21793

Females

9018

F40-44

9018

25.2M→Finish

25.2 - 26.2 mi

Top 81%
×2stories
+22ft-21ft

Overall

21532

Females

8867

F40-44

8867

Passing Analysis

Category:
Athletes Passed
2566
Passed By
921
Net Change
+1645
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24443
5K → 10K10679+1058#24443#23385
10K → 15K47317+456#23385#22929
15K → 20K33126+305#22929#22624
20K → Half369+27#22624#22597
Half → 25K21910+209#22597#22388
25K → 30K135108+27#22388#22361
30K → 20M3689-53#22361#22414
20M → 21M7223+49#22414#22365
21M → 35K2487-485#22365#22850
35K → 23M7737+40#22850#22810
23M → 24M3627+9#22810#22801
24M → 40K1959-40#22801#22841
40K → 25.2M206+14#22841#22827
25.2M → Finish4314+29#22827#22798
TOTALS2566921+1645
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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