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BOSTON MARATHON 2023

Katherine Groton

Bib: 9348•F

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 14%
Gender (Female)
#0 / 11423
Top 2%
Division (F18-39)
#0 / 4884
Top 4%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:49
Rank: #6393
Start → 5K
21:49 | 7:01/mi
10K· 6.21 mi
43:15
Rank: #6284 (+109)
5K → 10K
21:26 | 6:54/mi
15K· 9.32 mi
1:04:29
Rank: #5990 (+294)
10K → 15K
21:14 | 6:50/mi
20K· 12.43 mi
1:25:47
Rank: #5728 (+262)
15K → 20K
21:18 | 6:51/mi
Half· 13.11 mi
1:30:25
Rank: #5704 (+24)
20K → Half
4:38 | 6:47/mi
25K· 15.53 mi
1:46:54
Rank: #5453 (+251)
Half → 25K
16:29 | 6:48/mi
30K· 18.64 mi
2:08:07
Rank: #4957 (+496)
25K → 30K
21:13 | 6:50/mi
20M
2:17:20
Rank: #4730 (+227)
30K → 20M
9:13 | 6:47/mi
21M
2:24:15
Rank: #4492 (+238)
20M → 21M
6:55 | 6:55/mi
35K· 21.75 mi
2:29:19
Rank: #4455 (+37)
21M → 35K
5:04 | 6:46/mi
23M
2:37:48
Rank: #4277 (+178)
35K → 23M
8:29 | 6:47/mi
24M
2:44:19
Rank: #4148 (+129)
23M → 24M
6:31 | 6:31/mi
40K· 24.85 mi
2:49:57
Rank: #4008 (+140)
24M → 40K
5:38 | 6:35/mi
25.2M
2:52:19
Rank: #3929 (+79)
40K → 25.2M
2:22 | 6:52/mi
Finish· 26.22 mi
2:58:46
Rank: #3769 (+160)
25.2M → Finish
6:27 | 6:20/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:30:25
Pace6:54 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:28:21
Pace6:44 /mi
📊Negative Split: 2.3% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:47:2121:497:0121:49
7:01
-
10K
6.21 mi11:08:4743:156:5821:26
6:54
-0:07
15K
9.32 mi11:30:011:04:296:5521:14
6:50
-0:04
20K
12.43 mi11:51:191:25:476:5421:18
6:51
+0:01
Half
13.11 mi11:55:571:30:256:544:38
6:47
-0:04
25K
15.53 mi12:12:261:46:546:5316:29
6:48
+0:01
30K
18.64 mi12:33:392:08:076:5221:13
6:50
+0:02
20M
20.00 mi12:42:522:17:206:529:13
6:47
-0:03
21M
21.00 mi12:49:472:24:156:526:55
6:55
+0:08
35K
21.75 mi12:54:512:29:196:525:04
6:46
-0:09
23M
23.00 mi13:03:202:37:486:528:29
6:47
+0:01
24M
24.00 mi13:09:512:44:196:516:31
6:31
-0:16
40K
24.85 mi13:15:292:49:576:505:38
6:35
+0:04
25.2M
25.20 mi13:17:512:52:196:502:22
6:52
+0:17
Finish
26.22 mi13:24:182:58:466:496:27
6:20
-0:32

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

6:20 /mi

Average Pace

6:49 /mi

Slowest Pace

7:01 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:36:57

88% of race

Time at Steady Pace

21:49

12% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:49 /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 mi10:47:2121:497:0121:49
7:01
#6393
10K
6.21 mi11:08:4743:156:5821:26
6:54
#6284
15K
9.32 mi11:30:011:04:296:5521:14
6:50
#5990
20K
12.43 mi11:51:191:25:476:5421:18
6:51
#5728
Half
13.11 mi11:55:571:30:256:544:38
6:47
#5704
25K
15.53 mi12:12:261:46:546:5316:29
6:48
#5453
30K
18.64 mi12:33:392:08:076:5221:13
6:50
#4957
20M
20.00 mi12:42:522:17:206:529:13
6:47
#4730
21M
21.00 mi12:49:472:24:156:526:55
6:55
#4492
35K
21.75 mi12:54:512:29:196:525:04
6:46
#4455
23M
23.00 mi13:03:202:37:486:528:29
6:47
#4277
24M
24.00 mi13:09:512:44:196:516:31
6:31
#4148
40K
24.85 mi13:15:292:49:576:505:38
6:35
#4008
25.2M
25.20 mi13:17:512:52:196:502:22
6:52
#3929
Finish
26.22 mi13:24:182:58:466:496:27
6:20
#3769
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi63935745745443(Top 20%)419(Top 4%)419(Top 9%)
10K6.21 mi3.10 mi6284+1095745746132(Top 23%)560(Top 5%)560(Top 11%)
15K9.32 mi3.11 mi5990+294512+62512+625443(Top 20%)419(Top 4%)419(Top 9%)
20K12.43 mi3.11 mi5728+262455+57455+574979(Top 19%)354(Top 3%)354(Top 7%)
Half13.11 mi0.68 mi5704+24449+6449+65266(Top 20%)388(Top 3%)388(Top 8%)
25K15.53 mi2.42 mi5453+251412+37412+374157(Top 16%)262(Top 2%)262(Top 5%)
30K18.64 mi3.11 mi4957+496341+71341+713198(Top 12%)182(Top 2%)182(Top 4%)
20M20.00 mi1.36 mi4730+227319+22319+222742(Top 10%)147(Top 1%)147(Top 3%)
21M21.00 mi1.00 mi4492+238297+22297+221853(Top 7%)91(Top 0.8%)91(Top 2%)
35K21.75 mi0.75 mi4455+372972974062(Top 15%)330(Top 3%)330(Top 7%)
23M23.00 mi1.25 mi4277+178271+26271+262552(Top 10%)157(Top 1%)157(Top 3%)
24M24.00 mi1.00 mi4148+129261+10261+102201(Top 8%)138(Top 1%)138(Top 3%)
40K24.85 mi0.85 mi4008+140253+8253+81907(Top 7%)114(Top 1.0%)114(Top 2%)
25.2M25.20 mi0.35 mi3929+79246+7246+71391(Top 5%)80(Top 0.7%)80(Top 2%)
Finish26.22 mi1.02 mi3769+160228+18228+181768(Top 7%)109(Top 1.0%)109(Top 2%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 20%
×21stories
+97ft-345ft

Overall

5443

Females

419

F18-39

419

5K→10K

3.1 - 6.2 mi

Top 23%
×5stories
+79ft-138ft

Overall

6132

Females

560

F18-39

560

10K→15K

6.2 - 9.3 mi

Top 20%
×3stories
+67ft-78ft

Overall

5443

Females

419

F18-39

419

15K→20K

9.3 - 12.4 mi

Top 19%
×5stories
+106ft-86ft

Overall

4979

Females

354

F18-39

354

20K→Half

12.4 - 13.1 mi

Top 20%
×2stories
+19ft-37ft

Overall

5266

Females

388

F18-39

388

Half→25K

13.1 - 15.5 mi

Top 16%
×4stories
+66ft-88ft

Overall

4157

Females

262

F18-39

262

25K→30K

15.5 - 18.6 mi

Top 12%
×9stories
+181ft-148ft

Overall

3198

Females

182

F18-39

182

30K→20M

18.6 - 20.0 mi

Top 10%
×5stories
+64ft-50ft

Overall

2742

Females

147

F18-39

147

20M→21M

20.0 - 21.0 mi

Top 7%
×8stories
+106ft-24ft

Overall

1853

Females

91

F18-39

91

21M→35K

21.0 - 21.8 mi

Top 15%
×7stories
+17ft-86ft

Overall

4062

Females

330

F18-39

330

35K→23M

21.8 - 23.0 mi

Top 10%
×5stories
+23ft-63ft

Overall

2552

Females

157

F18-39

157

23M→24M

23.0 - 24.0 mi

Top 8%
×6stories
+12ft-82ft

Overall

2201

Females

138

F18-39

138

24M→40K

24.0 - 24.9 mi

Top 7%
×1story
+6ft-20ft

Overall

1907

Females

114

F18-39

114

40K→25.2M

24.9 - 25.2 mi

Top 5%
×1story
+13ft-16ft

Overall

1391

Females

80

F18-39

80

25.2M→Finish

25.2 - 26.2 mi

Top 7%
×2stories
+22ft-21ft

Overall

1768

Females

109

F18-39

109

Passing Analysis

Category:
Athletes Passed
2869
Passed By
245
Net Change
+2624
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6393
5K → 10K257148+109#6393#6284
10K → 15K31420+294#6284#5990
15K → 20K27513+262#5990#5728
20K → Half306+24#5728#5704
Half → 25K2532+251#5704#5453
25K → 30K4993+496#5453#4957
30K → 20M2281+227#4957#4730
20M → 21M2380+238#4730#4492
21M → 35K6326+37#4492#4455
35K → 23M18810+178#4455#4277
23M → 24M1389+129#4277#4148
24M → 40K1433+140#4148#4008
40K → 25.2M790+79#4008#3929
25.2M → Finish1644+160#3929#3769
TOTALS2869245+2624
📊

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