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BOSTON MARATHON 2023

Kathleen Burch

Bib: 14513•F

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 37%
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
7:56/mi
24:40
↑ 97↓ 3451.5%
10K· 6.21 mi
7:50/mi
49:01
↑ 79↓ 1380.4%
15K· 9.32 mi
7:54/mi
1:13:33
↑ 67↓ 78
20K· 12.43 mi
7:59/mi
1:38:22
↑ 106↓ 860.1%
Half· 13.11 mi
7:49/mi
1:43:42
↑ 19↓ 370.5%
25K· 15.53 mi
7:53/mi
2:02:50
↑ 66↓ 880.2%
30K· 18.64 mi
8:27/mi
2:29:04
↑ 181↓ 1480.2%
20M
8:37/mi
2:40:47
↑ 64↓ 500.2%
21M
9:11/mi
2:49:58
↑ 106↓ 241.6%
35K· 21.75 mi
8:49/mi
2:56:34
↑ 17↓ 861.7%
23M
9:03/mi
3:07:54
↑ 23↓ 630.6%
24M
9:03/mi
3:16:57
↓ 821.3%
40K· 24.85 mi
9:04/mi
3:24:42
↓ 200.3%
25.2M
9:23/mi
3:27:56
↑ 13↓ 160.2%
Finish· 26.22 mi
8:08/mi
3:36:13
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:42
Pace7:55 /mi
2nd Half
Distance13.11 mi
Time1:52:31
Pace8:35 /mi
📊Positive Split: 8.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:1424:407:5624:40
7:56
-
10K
6.21 mi11:18:3549:017:5324:21
7:50
-0:06
15K
9.32 mi11:43:071:13:337:5324:32
7:54
+0:04
20K
12.43 mi12:07:561:38:227:5524:49
7:59
+0:05
Half
13.11 mi12:13:161:43:427:555:20
7:49
-0:10
25K
15.53 mi12:32:242:02:507:5419:08
7:53
+0:04
30K
18.64 mi12:58:382:29:048:0026:14
8:27
+0:34
20M
20.00 mi13:10:212:40:478:0211:43
8:37
+0:10
21M
21.00 mi13:19:322:49:588:069:11
9:11
+0:34
35K
21.75 mi13:26:082:56:348:076:36
8:49
-0:22
23M
23.00 mi13:37:283:07:548:1011:20
9:03
+0:14
24M
24.00 mi13:46:313:16:578:129:03
9:03
0:00
40K
24.85 mi13:54:163:24:428:147:45
9:04
+0:01
25.2M
25.20 mi13:57:303:27:568:153:14
9:23
+0:19
Finish
26.22 mi14:05:473:36:138:158:17
8:08
-1:15

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

7:49 /mi

Average Pace

8:15 /mi

Slowest Pace

9:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:11:07

61% of race

Time at Steady Pace

37:57

18% of race

Time at Slower Pace

47:09

22% of race

Average Pace: 8:15 /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 mi10:54:1424:407:5624:40
7:56
#13594
10K
6.21 mi11:18:3549:017:5324:21
7:50
#13502
15K
9.32 mi11:43:071:13:337:5324:32
7:54
#13509
20K
12.43 mi12:07:561:38:227:5524:49
7:59
#13446
Half
13.11 mi12:13:161:43:427:555:20
7:49
#13404
25K
15.53 mi12:32:242:02:507:5419:08
7:53
#13113
30K
18.64 mi12:58:382:29:048:0026:14
8:27
#13281
20M
20.00 mi13:10:212:40:478:0211:43
8:37
#13342
21M
21.00 mi13:19:322:49:588:069:11
9:11
#13402
35K
21.75 mi13:26:082:56:348:076:36
8:49
#13560
23M
23.00 mi13:37:283:07:548:1011:20
9:03
#13742
24M
24.00 mi13:46:313:16:578:129:03
9:03
#13930
40K
24.85 mi13:54:163:24:428:147:45
9:04
#14023
25.2M
25.20 mi13:57:303:27:568:153:14
9:23
#14029
Finish
26.22 mi14:05:473:36:138:158:17
8:08
#13980
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi135943777377713519(Top 51%)3792(Top 33%)3792(Top 78%)
10K6.21 mi3.10 mi13502+923738+393738+3913467(Top 51%)3700(Top 32%)3700(Top 76%)
15K9.32 mi3.11 mi13509-73757-193757-1913519(Top 51%)3792(Top 33%)3792(Top 78%)
20K12.43 mi3.11 mi13446+633750+73750+713328(Top 50%)3726(Top 33%)3726(Top 76%)
Half13.11 mi0.68 mi13404+423727+233727+2312963(Top 49%)3492(Top 31%)3492(Top 71%)
25K15.53 mi2.42 mi13113+2913557+1703557+17011878(Top 45%)3010(Top 26%)3010(Top 62%)
30K18.64 mi3.11 mi13281-1683716-1593716-15913960(Top 52%)4313(Top 38%)4313(Top 88%)
20M20.00 mi1.36 mi13342-613761-453761-4514421(Top 54%)4655(Top 41%)4655(Top 95%)
21M21.00 mi1.00 mi13402-603819-583819-5814407(Top 54%)4712(Top 41%)4712(Top 96%)
35K21.75 mi0.75 mi13560-1583923-1043923-10417053(Top 64%)6291(Top 55%)6291(Top 129%)
23M23.00 mi1.25 mi13742-1824070-1474070-14716316(Top 61%)5916(Top 52%)5916(Top 121%)
24M24.00 mi1.00 mi13930-1884211-1414211-14117452(Top 66%)6600(Top 58%)6600(Top 135%)
40K24.85 mi0.85 mi14023-934288-774288-7716485(Top 62%)6115(Top 54%)6115(Top 125%)
25.2M25.20 mi0.35 mi14029-64296-84296-814598(Top 55%)5064(Top 44%)5064(Top 104%)
Finish26.22 mi1.02 mi13980+494283+134283+1312998(Top 49%)4214(Top 37%)4214(Top 86%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 51%
×21story building
+97ft-345ft

Overall

13519

Females

3792

F18-39

3792

5K→10K

3.1 - 6.2 mi

Top 51%
×5story building
+79ft-138ft

Overall

13467

Females

3700

F18-39

3700

10K→15K

6.2 - 9.3 mi

Top 51%
×3story building
+67ft-78ft

Overall

13519

Females

3792

F18-39

3792

15K→20K

9.3 - 12.4 mi

Top 50%
×5story building
+106ft-86ft

Overall

13328

Females

3726

F18-39

3726

20K→Half

12.4 - 13.1 mi

Top 49%
×2story building
+19ft-37ft

Overall

12963

Females

3492

F18-39

3492

Half→25K

13.1 - 15.5 mi

Top 45%
×4story building
+66ft-88ft

Overall

11878

Females

3010

F18-39

3010

25K→30K

15.5 - 18.6 mi

Top 52%
×9story building
+181ft-148ft

Overall

13960

Females

4313

F18-39

4313

30K→20M

18.6 - 20.0 mi

Top 54%
×5story building
+64ft-50ft

Overall

14421

Females

4655

F18-39

4655

20M→21M

20.0 - 21.0 mi

Top 54%
×8story building
+106ft-24ft

Overall

14407

Females

4712

F18-39

4712

21M→35K

21.0 - 21.8 mi

Top 64%
×7story building
+17ft-86ft

Overall

17053

Females

6291

F18-39

6291

35K→23M

21.8 - 23.0 mi

Top 61%
×5story building
+23ft-63ft

Overall

16316

Females

5916

F18-39

5916

23M→24M

23.0 - 24.0 mi

Top 66%
×6story building
+12ft-82ft

Overall

17452

Females

6600

F18-39

6600

24M→40K

24.0 - 24.9 mi

Top 62%
×1story
+6ft-20ft

Overall

16485

Females

6115

F18-39

6115

40K→25.2M

24.9 - 25.2 mi

Top 55%
×1story
+13ft-16ft

Overall

14598

Females

5064

F18-39

5064

25.2M→Finish

25.2 - 26.2 mi

Top 49%
×2story building
+22ft-21ft

Overall

12998

Females

4214

F18-39

4214

Passing Analysis

Category:
Athletes Passed
1668
Passed By
2054
Net Change
-386
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13594
5K → 10K346254+92#13594#13502
10K → 15K199206-7#13502#13509
15K → 20K214151+63#13509#13446
20K → Half5614+42#13446#13404
Half → 25K32029+291#13404#13113
25K → 30K140308-168#13113#13281
30K → 20M69130-61#13281#13342
20M → 21M65125-60#13342#13402
21M → 35K22180-158#13402#13560
35K → 23M41223-182#13560#13742
23M → 24M26214-188#13742#13930
24M → 40K46139-93#13930#14023
40K → 25.2M2531-6#14023#14029
25.2M → Finish9950+49#14029#13980
TOTALS16682054-386
📊

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