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BOSTON MARATHON 2023

Katherine Kay

Bib: 22929•F

ON

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F50-54)
#0 / 1207
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
28:35
Rank: #21213
Start → 5K
28:35 | 9:12/mi
10K· 6.21 mi
56:54
Rank: #21272 (-59)
5K → 10K
28:19 | 9:07/mi
15K· 9.32 mi
1:26:49
Rank: #21732 (-460)
10K → 15K
29:55 | 9:38/mi
20K· 12.43 mi
1:57:38
Rank: #21996 (-264)
15K → 20K
30:49 | 9:55/mi
Half· 13.11 mi
2:03:38
Rank: #21885 (+111)
20K → Half
6:00 | 8:48/mi
25K· 15.53 mi
2:26:37
Rank: #21690 (+195)
Half → 25K
22:59 | 9:29/mi
30K· 18.64 mi
2:57:46
Rank: #21581 (+109)
25K → 30K
31:09 | 10:02/mi
20M
3:10:21
Rank: #21341 (+240)
30K → 20M
12:35 | 9:16/mi
21M
3:20:15
Rank: #21149 (+192)
20M → 21M
9:54 | 9:54/mi
35K· 21.75 mi
3:27:02
Rank: #21043 (+106)
21M → 35K
6:47 | 9:04/mi
23M
3:39:58
Rank: #21015 (+28)
35K → 23M
12:56 | 10:20/mi
24M
3:48:50
Rank: #20828 (+187)
23M → 24M
8:52 | 8:52/mi
40K· 24.85 mi
3:56:30
Rank: #20685 (+143)
24M → 40K
7:40 | 8:58/mi
25.2M
3:59:49
Rank: #20622 (+63)
40K → 25.2M
3:19 | 9:37/mi
Finish· 26.22 mi
4:08:25
Rank: #20449 (+173)
25.2M → Finish
8:36 | 8:26/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time2:03:38
Pace9:26 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time2:04:47
Pace9:31 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:25:0228:359:1228:35
9:12
-
10K
6.21 mi11:53:2156:549:0928:19
9:07
-0:05
15K
9.32 mi12:23:161:26:499:1929:55
9:38
+0:31
20K
12.43 mi12:54:051:57:389:2830:49
9:55
+0:17
Half
13.11 mi13:00:052:03:389:266:00
8:48
-1:07
25K
15.53 mi13:23:042:26:379:2622:59
9:29
+0:41
30K
18.64 mi13:54:132:57:469:3231:09
10:02
+0:33
20M
20.00 mi14:06:483:10:219:3112:35
9:16
-0:46
21M
21.00 mi14:16:423:20:159:329:54
9:54
+0:38
35K
21.75 mi14:23:293:27:029:316:47
9:04
-0:50
23M
23.00 mi14:36:253:39:589:3412:56
10:20
+1:16
24M
24.00 mi14:45:173:48:509:328:52
8:52
-1:28
40K
24.85 mi14:52:573:56:309:317:40
8:58
+0:06
25.2M
25.20 mi14:56:163:59:499:313:19
9:37
+0:39
Finish
26.22 mi15:04:524:08:259:298:36
8:26
-1:11

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

8:26 /mi

Average Pace

9:29 /mi

Slowest Pace

10:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

31:08

13% of race

Time at Steady Pace

1:39:15

40% of race

Time at Slower Pace

1:58:02

48% of race

Average Pace: 9:28 /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 mi11:25:0228:359:1228:35
9:12
#21213
10K
6.21 mi11:53:2156:549:0928:19
9:07
#21272
15K
9.32 mi12:23:161:26:499:1929:55
9:38
#21732
20K
12.43 mi12:54:051:57:389:2830:49
9:55
#21996
Half
13.11 mi13:00:052:03:389:266:00
8:48
#21885
25K
15.53 mi13:23:042:26:379:2622:59
9:29
#21690
30K
18.64 mi13:54:132:57:469:3231:09
10:02
#21581
20M
20.00 mi14:06:483:10:219:3112:35
9:16
#21341
21M
21.00 mi14:16:423:20:159:329:54
9:54
#21149
35K
21.75 mi14:23:293:27:029:316:47
9:04
#21043
23M
23.00 mi14:36:253:39:589:3412:56
10:20
#21015
24M
24.00 mi14:45:173:48:509:328:52
8:52
#20828
40K
24.85 mi14:52:573:56:309:317:40
8:58
#20685
25.2M
25.20 mi14:56:163:59:499:313:19
9:37
#20622
Finish
26.22 mi15:04:524:08:259:298:36
8:26
#20449
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi212138482848222601(Top 85%)9129(Top 80%)9129(Top 756%)
10K6.21 mi3.10 mi21272-598463+198463+1921336(Top 80%)8461(Top 74%)8461(Top 701%)
15K9.32 mi3.11 mi21732-4608692-2298692-22922601(Top 85%)9129(Top 80%)9129(Top 756%)
20K12.43 mi3.11 mi21996-2648835-1438835-14322705(Top 85%)9190(Top 80%)9190(Top 761%)
Half13.11 mi0.68 mi21885+1118765+708765+7019524(Top 73%)7402(Top 65%)7402(Top 613%)
25K15.53 mi2.42 mi21690+1958648+1178648+11720777(Top 78%)8153(Top 71%)8153(Top 675%)
30K18.64 mi3.11 mi21581+1098605+438605+4321104(Top 79%)8403(Top 74%)8403(Top 696%)
20M20.00 mi1.36 mi21341+2408489+1168489+11617864(Top 67%)6675(Top 58%)6675(Top 553%)
21M21.00 mi1.00 mi21149+1928399+908399+9017683(Top 66%)6582(Top 58%)6582(Top 545%)
35K21.75 mi0.75 mi21043+1068351+488351+4818218(Top 68%)6970(Top 61%)6970(Top 577%)
23M23.00 mi1.25 mi21015+288339+128339+1220905(Top 79%)8465(Top 74%)8465(Top 701%)
24M24.00 mi1.00 mi20828+1878249+908249+9016641(Top 63%)6171(Top 54%)6171(Top 511%)
40K24.85 mi0.85 mi20685+1438180+698180+6916024(Top 60%)5882(Top 51%)5882(Top 487%)
25.2M25.20 mi0.35 mi20622+638147+338147+3315855(Top 60%)5811(Top 51%)5811(Top 481%)
Finish26.22 mi1.02 mi20449+1738057+908057+9015072(Top 57%)5307(Top 46%)5307(Top 440%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 85%
×21stories
+97ft-345ft

Overall

22601

Females

9129

F50-54

9129

5K→10K

3.1 - 6.2 mi

Top 80%
×5stories
+79ft-138ft

Overall

21336

Females

8461

F50-54

8461

10K→15K

6.2 - 9.3 mi

Top 85%
×3stories
+67ft-78ft

Overall

22601

Females

9129

F50-54

9129

15K→20K

9.3 - 12.4 mi

Top 85%
×5stories
+106ft-86ft

Overall

22705

Females

9190

F50-54

9190

20K→Half

12.4 - 13.1 mi

Top 73%
×2stories
+19ft-37ft

Overall

19524

Females

7402

F50-54

7402

Half→25K

13.1 - 15.5 mi

Top 78%
×4stories
+66ft-88ft

Overall

20777

Females

8153

F50-54

8153

25K→30K

15.5 - 18.6 mi

Top 79%
×9stories
+181ft-148ft

Overall

21104

Females

8403

F50-54

8403

30K→20M

18.6 - 20.0 mi

Top 67%
×5stories
+64ft-50ft

Overall

17864

Females

6675

F50-54

6675

20M→21M

20.0 - 21.0 mi

Top 66%
×8stories
+106ft-24ft

Overall

17683

Females

6582

F50-54

6582

21M→35K

21.0 - 21.8 mi

Top 68%
×7stories
+17ft-86ft

Overall

18218

Females

6970

F50-54

6970

35K→23M

21.8 - 23.0 mi

Top 79%
×5stories
+23ft-63ft

Overall

20905

Females

8465

F50-54

8465

23M→24M

23.0 - 24.0 mi

Top 63%
×6stories
+12ft-82ft

Overall

16641

Females

6171

F50-54

6171

24M→40K

24.0 - 24.9 mi

Top 60%
×1story
+6ft-20ft

Overall

16024

Females

5882

F50-54

5882

40K→25.2M

24.9 - 25.2 mi

Top 60%
×1story
+13ft-16ft

Overall

15855

Females

5811

F50-54

5811

25.2M→Finish

25.2 - 26.2 mi

Top 57%
×2stories
+22ft-21ft

Overall

15072

Females

5307

F50-54

5307

Passing Analysis

Category:
Athletes Passed
2042
Passed By
1278
Net Change
+764
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21213
5K → 10K242301-59#21213#21272
10K → 15K36496-460#21272#21732
15K → 20K57321-264#21732#21996
20K → Half1110+111#21996#21885
Half → 25K21419+195#21885#21690
25K → 30K18475+109#21690#21581
30K → 20M2422+240#21581#21341
20M → 21M1953+192#21341#21149
21M → 35K1104+106#21149#21043
35K → 23M8052+28#21043#21015
23M → 24M1870+187#21015#20828
24M → 40K1463+143#20828#20685
40K → 25.2M641+63#20685#20622
25.2M → Finish1741+173#20622#20449
TOTALS20421278+764
📊

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