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BOSTON MARATHON 2023

Judy Libby

Bib: 22745•F

FL

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Top 49%
Division (F55-59)
#0 / 815
Top 27%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:56
Rank: #20405
Start → 5K
27:56 | 8:59/mi
10K· 6.21 mi
55:51
Rank: #20602 (-197)
5K → 10K
27:55 | 8:59/mi
15K· 9.32 mi
1:23:48
Rank: #20520 (+82)
10K → 15K
27:57 | 9:00/mi
20K· 12.43 mi
1:51:19
Rank: #20141 (+379)
15K → 20K
27:31 | 8:51/mi
Half· 13.11 mi
1:57:15
Rank: #20096 (+45)
20K → Half
5:56 | 8:42/mi
25K· 15.53 mi
2:18:23
Rank: #19664 (+432)
Half → 25K
21:08 | 8:43/mi
30K· 18.64 mi
2:45:23
Rank: #18961 (+703)
25K → 30K
27:00 | 8:41/mi
20M
2:57:19
Rank: #18708 (+253)
30K → 20M
11:56 | 8:47/mi
21M
3:06:33
Rank: #18446 (+262)
20M → 21M
9:14 | 9:14/mi
35K· 21.75 mi
3:12:59
Rank: #18348 (+98)
21M → 35K
6:26 | 8:36/mi
23M
3:23:46
Rank: #18096 (+252)
35K → 23M
10:47 | 8:37/mi
24M
3:32:21
Rank: #17971 (+125)
23M → 24M
8:35 | 8:35/mi
40K· 24.85 mi
3:39:46
Rank: #17855 (+116)
24M → 40K
7:25 | 8:40/mi
25.2M
3:43:03
Rank: #17814 (+41)
40K → 25.2M
3:17 | 9:31/mi
Finish· 26.22 mi
3:51:48
Rank: #17749 (+65)
25.2M → Finish
8:45 | 8:35/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:57:15
Pace8:57 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:54:33
Pace8:44 /mi
📊Negative Split: 2.3% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:24:3227:568:5927:56
8:59
-
10K
6.21 mi11:52:2755:518:5927:55
8:59
0:00
15K
9.32 mi12:20:241:23:488:5927:57
9:00
+0:01
20K
12.43 mi12:47:551:51:198:5727:31
8:51
-0:09
Half
13.11 mi12:53:511:57:158:575:56
8:42
-0:09
25K
15.53 mi13:14:592:18:238:5421:08
8:43
+0:01
30K
18.64 mi13:41:592:45:238:5227:00
8:41
-0:02
20M
20.00 mi13:53:552:57:198:5211:56
8:47
+0:06
21M
21.00 mi14:03:093:06:338:539:14
9:14
+0:27
35K
21.75 mi14:09:353:12:598:526:26
8:36
-0:38
23M
23.00 mi14:20:223:23:468:5210:47
8:37
+0:01
24M
24.00 mi14:28:573:32:218:518:35
8:35
-0:02
40K
24.85 mi14:36:223:39:468:517:25
8:40
+0:05
25.2M
25.20 mi14:39:393:43:038:513:17
9:31
+0:51
Finish
26.22 mi14:48:243:51:488:518:45
8:35
-0:56

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

8:35 /mi

Average Pace

8:51 /mi

Slowest Pace

9:31 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:48:31

99% of race

Time at Steady Pace

3:17

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:50 /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 mi11:24:3227:568:5927:56
8:59
#20405
10K
6.21 mi11:52:2755:518:5927:55
8:59
#20602
15K
9.32 mi12:20:241:23:488:5927:57
9:00
#20520
20K
12.43 mi12:47:551:51:198:5727:31
8:51
#20141
Half
13.11 mi12:53:511:57:158:575:56
8:42
#20096
25K
15.53 mi13:14:592:18:238:5421:08
8:43
#19664
30K
18.64 mi13:41:592:45:238:5227:00
8:41
#18961
20M
20.00 mi13:53:552:57:198:5211:56
8:47
#18708
21M
21.00 mi14:03:093:06:338:539:14
9:14
#18446
35K
21.75 mi14:09:353:12:598:526:26
8:36
#18348
23M
23.00 mi14:20:223:23:468:5210:47
8:37
#18096
24M
24.00 mi14:28:573:32:218:518:35
8:35
#17971
40K
24.85 mi14:36:223:39:468:517:25
8:40
#17855
25.2M
25.20 mi14:39:393:43:038:513:17
9:31
#17814
Finish
26.22 mi14:48:243:51:488:518:45
8:35
#17749
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi204058055805520492(Top 77%)7949(Top 70%)7949(Top 975%)
10K6.21 mi3.10 mi20602-1978088-338088-3320818(Top 78%)8162(Top 71%)8162(Top 1001%)
15K9.32 mi3.11 mi20520+828025+638025+6320492(Top 77%)7949(Top 70%)7949(Top 975%)
20K12.43 mi3.11 mi20141+3797796+2297796+22918983(Top 71%)7075(Top 62%)7075(Top 868%)
Half13.11 mi0.68 mi20096+457770+267770+2618940(Top 71%)7039(Top 62%)7039(Top 864%)
25K15.53 mi2.42 mi19664+4327517+2537517+25317477(Top 66%)6270(Top 55%)6270(Top 769%)
30K18.64 mi3.11 mi18961+7037116+4017116+40115476(Top 58%)5210(Top 46%)5210(Top 639%)
20M20.00 mi1.36 mi18708+2536987+1296987+12915353(Top 58%)5202(Top 46%)5202(Top 638%)
21M21.00 mi1.00 mi18446+2626853+1346853+13414682(Top 55%)4875(Top 43%)4875(Top 598%)
35K21.75 mi0.75 mi18348+986803+506803+5015907(Top 60%)5642(Top 49%)5642(Top 692%)
23M23.00 mi1.25 mi18096+2526671+1326671+13213904(Top 52%)4567(Top 40%)4567(Top 560%)
24M24.00 mi1.00 mi17971+1256608+636608+6315008(Top 56%)5246(Top 46%)5246(Top 644%)
40K24.85 mi0.85 mi17855+1166542+666542+6614416(Top 54%)4988(Top 44%)4988(Top 612%)
25.2M25.20 mi0.35 mi17814+416525+176525+1715369(Top 58%)5530(Top 48%)5530(Top 679%)
Finish26.22 mi1.02 mi17749+656502+236502+2315949(Top 60%)5784(Top 51%)5784(Top 710%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 77%
×21stories
+97ft-345ft

Overall

20492

Females

7949

F55-59

7949

5K→10K

3.1 - 6.2 mi

Top 78%
×5stories
+79ft-138ft

Overall

20818

Females

8162

F55-59

8162

10K→15K

6.2 - 9.3 mi

Top 77%
×3stories
+67ft-78ft

Overall

20492

Females

7949

F55-59

7949

15K→20K

9.3 - 12.4 mi

Top 71%
×5stories
+106ft-86ft

Overall

18983

Females

7075

F55-59

7075

20K→Half

12.4 - 13.1 mi

Top 71%
×2stories
+19ft-37ft

Overall

18940

Females

7039

F55-59

7039

Half→25K

13.1 - 15.5 mi

Top 66%
×4stories
+66ft-88ft

Overall

17477

Females

6270

F55-59

6270

25K→30K

15.5 - 18.6 mi

Top 58%
×9stories
+181ft-148ft

Overall

15476

Females

5210

F55-59

5210

30K→20M

18.6 - 20.0 mi

Top 58%
×5stories
+64ft-50ft

Overall

15353

Females

5202

F55-59

5202

20M→21M

20.0 - 21.0 mi

Top 55%
×8stories
+106ft-24ft

Overall

14682

Females

4875

F55-59

4875

21M→35K

21.0 - 21.8 mi

Top 60%
×7stories
+17ft-86ft

Overall

15907

Females

5642

F55-59

5642

35K→23M

21.8 - 23.0 mi

Top 52%
×5stories
+23ft-63ft

Overall

13904

Females

4567

F55-59

4567

23M→24M

23.0 - 24.0 mi

Top 56%
×6stories
+12ft-82ft

Overall

15008

Females

5246

F55-59

5246

24M→40K

24.0 - 24.9 mi

Top 54%
×1story
+6ft-20ft

Overall

14416

Females

4988

F55-59

4988

40K→25.2M

24.9 - 25.2 mi

Top 58%
×1story
+13ft-16ft

Overall

15369

Females

5530

F55-59

5530

25.2M→Finish

25.2 - 26.2 mi

Top 60%
×2stories
+22ft-21ft

Overall

15949

Females

5784

F55-59

5784

Passing Analysis

Category:
Athletes Passed
3315
Passed By
659
Net Change
+2656
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20405
5K → 10K205402-197#20405#20602
10K → 15K216134+82#20602#20520
15K → 20K40728+379#20520#20141
20K → Half5712+45#20141#20096
Half → 25K44210+432#20096#19664
25K → 30K7063+703#19664#18961
30K → 20M2596+253#18961#18708
20M → 21M2686+262#18708#18446
21M → 35K1057+98#18446#18348
35K → 23M2531+252#18348#18096
23M → 24M1338+125#18096#17971
24M → 40K1237+116#17971#17855
40K → 25.2M5110+41#17855#17814
25.2M → Finish9025+65#17814#17749
TOTALS3315659+2656
📊

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