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BOSTON MARATHON 2023

Kathryn Mccarthy

Bib: 18266•F

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 42%
Gender (Female)
#0 / 11423
Top 24%
Division (F18-39)
#0 / 4884
Top 40%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:44
Rank: #10931
Start → 5K
7:38/mi
23:44 split
10K· 6.21 mi
47:22
Rank: #11127 (-196)
5K → 10K
7:36/mi
23:38 split
15K· 9.32 mi
1:10:52
Rank: #10955 (+172)
10K → 15K
7:34/mi
23:30 split
20K· 12.43 mi
1:34:41
Rank: #10864 (+91)
15K → 20K
7:40/mi
23:49 split
Half· 13.11 mi
1:39:53
Rank: #10898 (-34)
20K → Half
7:37/mi
5:12 split
25K· 15.53 mi
1:58:27
Rank: #10694 (+204)
Half → 25K
7:39/mi
18:34 split
30K· 18.64 mi
2:23:01
Rank: #10545 (+149)
25K → 30K
7:54/mi
24:34 split
20M
2:34:16
Rank: #10668 (-123)
30K → 20M
8:17/mi
11:15 split
21M
2:43:23
Rank: #10852 (-184)
20M → 21M
9:07/mi
9:07 split
35K· 21.75 mi
2:49:43
Rank: #11012 (-160)
21M → 35K
8:28/mi
6:20 split
23M
3:00:16
Rank: #11114 (-102)
35K → 23M
8:26/mi
10:33 split
24M
3:08:22
Rank: #11148 (-34)
23M → 24M
8:06/mi
8:06 split
40K· 24.85 mi
3:15:34
Rank: #11202 (-54)
24M → 40K
8:25/mi
7:12 split
25.2M
3:18:37
Rank: #11188 (+14)
40K → 25.2M
8:51/mi
3:03 split
Finish· 26.22 mi
3:26:42
Rank: #11197 (-9)
25.2M → Finish
7:56/mi
8:05 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:39:53
Pace7:37 /mi
2nd Half
Distance13.11 mi
Time1:46:49
Pace8:09 /mi
📊Positive Split: 6.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:14:3823:447:3823:44
7:38
-
10K
6.21 mi11:38:1647:227:3723:38
7:36
-0:02
15K
9.32 mi12:01:461:10:527:3623:30
7:34
-0:02
20K
12.43 mi12:25:351:34:417:3723:49
7:40
+0:06
Half
13.11 mi12:30:471:39:537:375:12
7:37
-0:03
25K
15.53 mi12:49:211:58:277:3818:34
7:39
+0:02
30K
18.64 mi13:13:552:23:017:4024:34
7:54
+0:15
20M
20.00 mi13:25:102:34:167:4311:15
8:17
+0:23
21M
21.00 mi13:34:172:43:237:479:07
9:07
+0:50
35K
21.75 mi13:40:372:49:437:486:20
8:28
-0:39
23M
23.00 mi13:51:103:00:167:5010:33
8:26
-0:02
24M
24.00 mi13:59:163:08:227:518:06
8:06
-0:20
40K
24.85 mi14:06:283:15:347:527:12
8:25
+0:19
25.2M
25.20 mi14:09:313:18:377:533:03
8:51
+0:26
Finish
26.22 mi14:17:363:26:427:538:05
7:56
-0:55

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

7:34 /mi

Average Pace

7:53 /mi

Slowest Pace

9:07 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:58:27

57% of race

Time at Steady Pace

40:45

20% of race

Time at Slower Pace

47:30

23% of race

Average Pace: 7:53 /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 mi11:14:3823:447:3823:44
7:38
#10931
10K
6.21 mi11:38:1647:227:3723:38
7:36
#11127
15K
9.32 mi12:01:461:10:527:3623:30
7:34
#10955
20K
12.43 mi12:25:351:34:417:3723:49
7:40
#10864
Half
13.11 mi12:30:471:39:537:375:12
7:37
#10898
25K
15.53 mi12:49:211:58:277:3818:34
7:39
#10694
30K
18.64 mi13:13:552:23:017:4024:34
7:54
#10545
20M
20.00 mi13:25:102:34:167:4311:15
8:17
#10668
21M
21.00 mi13:34:172:43:237:479:07
9:07
#10852
35K
21.75 mi13:40:372:49:437:486:20
8:28
#11012
23M
23.00 mi13:51:103:00:167:5010:33
8:26
#11114
24M
24.00 mi13:59:163:08:227:518:06
8:06
#11148
40K
24.85 mi14:06:283:15:347:527:12
8:25
#11202
25.2M
25.20 mi14:09:313:18:377:533:03
8:51
#11188
Finish
26.22 mi14:17:363:26:427:538:05
7:56
#11197
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi109312297229710730(Top 40%)2199(Top 19%)2199(Top 45%)
10K6.21 mi3.10 mi11127-1962392-952392-9511402(Top 43%)2555(Top 22%)2555(Top 52%)
15K9.32 mi3.11 mi10955+1722311+812311+8110730(Top 40%)2199(Top 19%)2199(Top 45%)
20K12.43 mi3.11 mi10864+912274+372274+3710654(Top 40%)2234(Top 20%)2234(Top 46%)
Half13.11 mi0.68 mi10898-342287-132287-1311276(Top 42%)2507(Top 22%)2507(Top 51%)
25K15.53 mi2.42 mi10694+2042196+912196+919997(Top 38%)2009(Top 18%)2009(Top 41%)
30K18.64 mi3.11 mi10545+1492177+192177+1910207(Top 38%)2260(Top 20%)2260(Top 46%)
20M20.00 mi1.36 mi10668-1232268-912268-9112217(Top 46%)3399(Top 30%)3399(Top 70%)
21M21.00 mi1.00 mi10852-1842386-1182386-11814065(Top 53%)4512(Top 39%)4512(Top 92%)
35K21.75 mi0.75 mi11012-1602480-942480-9415106(Top 57%)5157(Top 45%)5157(Top 106%)
23M23.00 mi1.25 mi11114-1022553-732553-7312753(Top 48%)3932(Top 34%)3932(Top 81%)
24M24.00 mi1.00 mi11148-342603-502603-5011956(Top 45%)3557(Top 31%)3557(Top 73%)
40K24.85 mi0.85 mi11202-542655-522655-5212843(Top 48%)4116(Top 36%)4116(Top 84%)
25.2M25.20 mi0.35 mi11188+142662-72662-711614(Top 44%)3510(Top 31%)3510(Top 72%)
Finish26.22 mi1.02 mi11197-92686-242686-2411640(Top 44%)3511(Top 31%)3511(Top 72%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21stories
+97ft-345ft

Overall

10730

Females

2199

F18-39

2199

5K→10K

3.1 - 6.2 mi

Top 43%
×5stories
+79ft-138ft

Overall

11402

Females

2555

F18-39

2555

10K→15K

6.2 - 9.3 mi

Top 40%
×3stories
+67ft-78ft

Overall

10730

Females

2199

F18-39

2199

15K→20K

9.3 - 12.4 mi

Top 40%
×5stories
+106ft-86ft

Overall

10654

Females

2234

F18-39

2234

20K→Half

12.4 - 13.1 mi

Top 42%
×2stories
+19ft-37ft

Overall

11276

Females

2507

F18-39

2507

Half→25K

13.1 - 15.5 mi

Top 38%
×4stories
+66ft-88ft

Overall

9997

Females

2009

F18-39

2009

25K→30K

15.5 - 18.6 mi

Top 38%
×9stories
+181ft-148ft

Overall

10207

Females

2260

F18-39

2260

30K→20M

18.6 - 20.0 mi

Top 46%
×5stories
+64ft-50ft

Overall

12217

Females

3399

F18-39

3399

20M→21M

20.0 - 21.0 mi

Top 53%
×8stories
+106ft-24ft

Overall

14065

Females

4512

F18-39

4512

21M→35K

21.0 - 21.8 mi

Top 57%
×7stories
+17ft-86ft

Overall

15106

Females

5157

F18-39

5157

35K→23M

21.8 - 23.0 mi

Top 48%
×5stories
+23ft-63ft

Overall

12753

Females

3932

F18-39

3932

23M→24M

23.0 - 24.0 mi

Top 45%
×6stories
+12ft-82ft

Overall

11956

Females

3557

F18-39

3557

24M→40K

24.0 - 24.9 mi

Top 48%
×1story
+6ft-20ft

Overall

12843

Females

4116

F18-39

4116

40K→25.2M

24.9 - 25.2 mi

Top 44%
×1story
+13ft-16ft

Overall

11614

Females

3510

F18-39

3510

25.2M→Finish

25.2 - 26.2 mi

Top 44%
×2stories
+22ft-21ft

Overall

11640

Females

3511

F18-39

3511

Passing Analysis

Category:
Athletes Passed
1554*
Passed By
1820
Net Change
-266
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10931
5K → 10K213409-196#10931#11127
10K → 15K273101+172#11127#10955
15K → 20K200109+91#10955#10864
20K → Half1953-34#10864#10898
Half → 25K23430+204#10898#10694
25K → 30K249100+149#10694#10545
30K → 20M47*170-123#10545#10668
20M → 21M29213-184#10668#10852
21M → 35K16176-160#10852#11012
35K → 23M61163-102#11012#11114
23M → 24M66100-34#11114#11148
24M → 40K4195-54#11148#11202
40K → 25.2M3824+14#11202#11188
25.2M → Finish6877-9#11188#11197
TOTALS1554*1820-266

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

📊

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