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BOSTON MARATHON 2023

Jessica Libby

Bib: 25415•F

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
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
10:13/mi
31:43
↑ 97↓ 3451.5%
10K· 6.21 mi
10:33/mi
1:04:31
↑ 79↓ 1380.4%
15K· 9.32 mi
10:22/mi
1:36:43
↑ 67↓ 78
20K· 12.43 mi
10:44/mi
2:10:03
↑ 106↓ 860.1%
Half· 13.11 mi
10:10/mi
2:16:59
↑ 19↓ 370.5%
25K· 15.53 mi
11:04/mi
2:43:48
↑ 66↓ 880.2%
30K· 18.64 mi
12:04/mi
3:21:18
↑ 181↓ 1480.2%
20M
12:33/mi
3:38:21
↑ 64↓ 500.2%
21M
12:40/mi
3:51:01
↑ 106↓ 241.6%
35K· 21.75 mi
12:19/mi
4:00:14
↑ 17↓ 861.7%
23M
12:28/mi
4:15:51
↑ 23↓ 630.6%
24M
11:18/mi
4:27:09
↓ 821.3%
40K· 24.85 mi
12:40/mi
4:37:59
↓ 200.3%
25.2M
12:54/mi
4:42:26
↑ 13↓ 160.2%
Finish· 26.22 mi
10:40/mi
4:53:18
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:16:59
Pace10:27 /mi
2nd Half
Distance13.11 mi
Time2:36:19
Pace11:55 /mi
📊Positive Split: 14.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:47:4731:4310:1331:43
10:13
-
10K
6.21 mi12:20:351:04:3110:2332:48
10:33
+0:20
15K
9.32 mi12:52:471:36:4310:2332:12
10:22
-0:11
20K
12.43 mi13:26:072:10:0310:2833:20
10:44
+0:22
Half
13.11 mi13:33:032:16:5910:276:56
10:10
-0:34
25K
15.53 mi13:59:522:43:4810:3326:49
11:04
+0:54
30K
18.64 mi14:37:223:21:1810:4837:30
12:04
+1:00
20M
20.00 mi14:54:253:38:2110:5517:03
12:33
+0:29
21M
21.00 mi15:07:053:51:0111:0012:40
12:40
+0:07
35K
21.75 mi15:16:184:00:1411:039:13
12:19
-0:21
23M
23.00 mi15:31:554:15:5111:0715:37
12:28
+0:09
24M
24.00 mi15:43:134:27:0911:0811:18
11:18
-1:10
40K
24.85 mi15:54:034:37:5911:1110:50
12:40
+1:22
25.2M
25.20 mi15:58:304:42:2611:124:27
12:54
+0:14
Finish
26.22 mi16:09:224:53:1811:1210:52
10:40
-2:14

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

10:10 /mi

Average Pace

11:12 /mi

Slowest Pace

12:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:27:51

50% of race

Time at Steady Pace

38:07

13% of race

Time at Slower Pace

1:47:20

37% of race

Average Pace: 11:11 /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 mi11:47:4731:4310:1331:43
10:13
#23981
10K
6.21 mi12:20:351:04:3110:2332:48
10:33
#24459
15K
9.32 mi12:52:471:36:4310:2332:12
10:22
#24381
20K
12.43 mi13:26:072:10:0310:2833:20
10:44
#24360
Half
13.11 mi13:33:032:16:5910:276:56
10:10
#24314
25K
15.53 mi13:59:522:43:4810:3326:49
11:04
#24267
30K
18.64 mi14:37:223:21:1810:4837:30
12:04
#24364
20M
20.00 mi14:54:253:38:2110:5517:03
12:33
#24405
21M
21.00 mi15:07:053:51:0111:0012:40
12:40
#24361
35K
21.75 mi15:16:184:00:1411:039:13
12:19
#24395
23M
23.00 mi15:31:554:15:5111:0715:37
12:28
#24417
24M
24.00 mi15:43:134:27:0911:0811:18
11:18
#24390
40K
24.85 mi15:54:034:37:5911:1110:50
12:40
#24429
25.2M
25.20 mi15:58:304:42:2611:124:27
12:54
#24426
Finish
26.22 mi16:09:224:53:1811:1210:52
10:40
#24400
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi239819877987724211(Top 91%)10012(Top 88%)10012(Top 205%)
10K6.21 mi3.10 mi24459-47810137-26010137-26024783(Top 93%)10318(Top 90%)10318(Top 211%)
15K9.32 mi3.11 mi24381+7810096+4110096+4124211(Top 91%)10012(Top 88%)10012(Top 205%)
20K12.43 mi3.11 mi24360+2110099-310099-324222(Top 91%)10046(Top 88%)10046(Top 206%)
Half13.11 mi0.68 mi24314+4610071+2810071+2823623(Top 89%)9697(Top 85%)9697(Top 199%)
25K15.53 mi2.42 mi24267+4710057+1410057+1424077(Top 90%)9994(Top 87%)9994(Top 205%)
30K18.64 mi3.11 mi24364-9710132-7510132-7524583(Top 92%)10330(Top 90%)10330(Top 212%)
20M20.00 mi1.36 mi24405-4110159-2710159-2724797(Top 93%)10499(Top 92%)10499(Top 215%)
21M21.00 mi1.00 mi24361+4410141+1810141+1823676(Top 89%)9909(Top 87%)9909(Top 203%)
35K21.75 mi0.75 mi24395-3410166-2510166-2524999(Top 94%)10654(Top 93%)10654(Top 218%)
23M23.00 mi1.25 mi24417-2210189-2310189-2324556(Top 92%)10417(Top 91%)10417(Top 213%)
24M24.00 mi1.00 mi24390+2710187+210187+223597(Top 89%)9945(Top 87%)9945(Top 204%)
40K24.85 mi0.85 mi24429-3910213-2610213-2624652(Top 93%)10497(Top 92%)10497(Top 215%)
25.2M25.20 mi0.35 mi24426+310211+210211+223863(Top 90%)10122(Top 89%)10122(Top 207%)
Finish26.22 mi1.02 mi24400+2610202+910202+923363(Top 88%)9842(Top 86%)9842(Top 202%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 91%
×21story building
+97ft-345ft

Overall

24211

Females

10012

F18-39

10012

5K→10K

3.1 - 6.2 mi

Top 93%
×5story building
+79ft-138ft

Overall

24783

Females

10318

F18-39

10318

10K→15K

6.2 - 9.3 mi

Top 91%
×3story building
+67ft-78ft

Overall

24211

Females

10012

F18-39

10012

15K→20K

9.3 - 12.4 mi

Top 91%
×5story building
+106ft-86ft

Overall

24222

Females

10046

F18-39

10046

20K→Half

12.4 - 13.1 mi

Top 89%
×2story building
+19ft-37ft

Overall

23623

Females

9697

F18-39

9697

Half→25K

13.1 - 15.5 mi

Top 90%
×4story building
+66ft-88ft

Overall

24077

Females

9994

F18-39

9994

25K→30K

15.5 - 18.6 mi

Top 92%
×9story building
+181ft-148ft

Overall

24583

Females

10330

F18-39

10330

30K→20M

18.6 - 20.0 mi

Top 93%
×5story building
+64ft-50ft

Overall

24797

Females

10499

F18-39

10499

20M→21M

20.0 - 21.0 mi

Top 89%
×8story building
+106ft-24ft

Overall

23676

Females

9909

F18-39

9909

21M→35K

21.0 - 21.8 mi

Top 94%
×7story building
+17ft-86ft

Overall

24999

Females

10654

F18-39

10654

35K→23M

21.8 - 23.0 mi

Top 92%
×5story building
+23ft-63ft

Overall

24556

Females

10417

F18-39

10417

23M→24M

23.0 - 24.0 mi

Top 89%
×6story building
+12ft-82ft

Overall

23597

Females

9945

F18-39

9945

24M→40K

24.0 - 24.9 mi

Top 93%
×1story
+6ft-20ft

Overall

24652

Females

10497

F18-39

10497

40K→25.2M

24.9 - 25.2 mi

Top 90%
×1story
+13ft-16ft

Overall

23863

Females

10122

F18-39

10122

25.2M→Finish

25.2 - 26.2 mi

Top 88%
×2story building
+22ft-21ft

Overall

23363

Females

9842

F18-39

9842

Passing Analysis

Category:
Athletes Passed
820
Passed By
1239
Net Change
-419
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23981
5K → 10K53531-478#23981#24459
10K → 15K16789+78#24459#24381
15K → 20K11291+21#24381#24360
20K → Half482+46#24360#24314
Half → 25K11063+47#24314#24267
25K → 30K78175-97#24267#24364
30K → 20M3172-41#24364#24405
20M → 21M6824+44#24405#24361
21M → 35K1751-34#24361#24395
35K → 23M2951-22#24395#24417
23M → 24M4417+27#24417#24390
24M → 40K1655-39#24390#24429
40K → 25.2M107+3#24429#24426
25.2M → Finish3711+26#24426#24400
TOTALS8201239-419
📊

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