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BOSTON MARATHON 2023

Katherine Lail

Bib: 31144•F

GA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F50-54)
#0 / 1207
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
9:55/mi
30:49
↑ 97↓ 3451.5%
10K· 6.21 mi
9:17/mi
59:41
↑ 79↓ 1380.4%
15K· 9.32 mi
9:16/mi
1:28:27
↑ 67↓ 78
20K· 12.43 mi
9:29/mi
1:57:54
↑ 106↓ 860.1%
Half· 13.11 mi
9:24/mi
2:04:19
↑ 19↓ 370.5%
25K· 15.53 mi
9:40/mi
2:27:45
↑ 66↓ 880.2%
30K· 18.64 mi
10:07/mi
2:59:11
↑ 181↓ 1480.2%
20M
10:30/mi
3:13:27
↑ 64↓ 500.2%
21M
11:48/mi
3:25:15
↑ 106↓ 241.6%
35K· 21.75 mi
10:42/mi
3:33:15
↑ 17↓ 861.7%
23M
10:58/mi
3:46:59
↑ 23↓ 630.6%
24M
10:36/mi
3:57:35
↓ 821.3%
40K· 24.85 mi
10:23/mi
4:06:28
↓ 200.3%
25.2M
11:13/mi
4:10:20
↑ 13↓ 160.2%
Finish· 26.22 mi
9:50/mi
4:20:21
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:04:19
Pace9:29 /mi
2nd Half
Distance13.11 mi
Time2:16:02
Pace10:23 /mi
📊Positive Split: 9.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:50:3330:499:5530:49
9:55
-
10K
6.21 mi12:19:2559:419:3628:52
9:17
-0:38
15K
9.32 mi12:48:111:28:279:2928:46
9:16
-0:01
20K
12.43 mi13:17:381:57:549:2929:27
9:29
+0:13
Half
13.11 mi13:24:032:04:199:296:25
9:24
-0:05
25K
15.53 mi13:47:292:27:459:3123:26
9:40
+0:16
30K
18.64 mi14:18:552:59:119:3731:26
10:07
+0:27
20M
20.00 mi14:33:113:13:279:4014:16
10:30
+0:23
21M
21.00 mi14:44:593:25:159:4611:48
11:48
+1:18
35K
21.75 mi14:52:593:33:159:488:00
10:42
-1:06
23M
23.00 mi15:06:433:46:599:5213:44
10:58
+0:16
24M
24.00 mi15:17:193:57:359:5410:36
10:36
-0:22
40K
24.85 mi15:26:124:06:289:558:53
10:23
-0:13
25.2M
25.20 mi15:30:044:10:209:563:52
11:13
+0:50
Finish
26.22 mi15:40:054:20:219:5610:01
9:50
-1:23

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

9:16 /mi

Average Pace

9:56 /mi

Slowest Pace

11:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:56:56

45% of race

Time at Steady Pace

1:21:09

31% of race

Time at Slower Pace

1:02:16

24% of race

Average Pace: 9:56 /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 mi11:50:3330:499:5530:49
9:55
#23255
10K
6.21 mi12:19:2559:419:3628:52
9:17
#22623
15K
9.32 mi12:48:111:28:279:2928:46
9:16
#22280
20K
12.43 mi13:17:381:57:549:2929:27
9:29
#22067
Half
13.11 mi13:24:032:04:199:296:25
9:24
#22053
25K
15.53 mi13:47:292:27:459:3123:26
9:40
#21927
30K
18.64 mi14:18:552:59:119:3731:26
10:07
#21792
20M
20.00 mi14:33:113:13:279:4014:16
10:30
#21798
21M
21.00 mi14:44:593:25:159:4611:48
11:48
#21859
35K
21.75 mi14:52:593:33:159:488:00
10:42
#21916
23M
23.00 mi15:06:433:46:599:5213:44
10:58
#21941
24M
24.00 mi15:17:193:57:359:5410:36
10:36
#21948
40K
24.85 mi15:26:124:06:289:558:53
10:23
#21904
25.2M
25.20 mi15:30:044:10:209:563:52
11:13
#21893
Finish
26.22 mi15:40:054:20:219:5610:01
9:50
#21875
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi232559523952321513(Top 81%)8508(Top 74%)8508(Top 705%)
10K6.21 mi3.10 mi22623+6329161+3629161+36221912(Top 82%)8777(Top 77%)8777(Top 727%)
15K9.32 mi3.11 mi22280+3438976+1858976+18521513(Top 81%)8508(Top 74%)8508(Top 705%)
20K12.43 mi3.11 mi22067+2138870+1068870+10621492(Top 81%)8523(Top 75%)8523(Top 706%)
Half13.11 mi0.68 mi22053+148858+128858+1221851(Top 82%)8712(Top 76%)8712(Top 722%)
25K15.53 mi2.42 mi21927+1268785+738785+7321348(Top 80%)8467(Top 74%)8467(Top 701%)
30K18.64 mi3.11 mi21792+1358717+688717+6821333(Top 80%)8536(Top 75%)8536(Top 707%)
20M20.00 mi1.36 mi21798-68731-148731-1421735(Top 82%)8835(Top 77%)8835(Top 732%)
21M21.00 mi1.00 mi21859-618775-448775-4422425(Top 84%)9238(Top 81%)9238(Top 765%)
35K21.75 mi0.75 mi21916-578807-328807-3222741(Top 85%)9446(Top 83%)9446(Top 783%)
23M23.00 mi1.25 mi21941-258832-258832-2522289(Top 84%)9210(Top 81%)9210(Top 763%)
24M24.00 mi1.00 mi21948-78849-178849-1722239(Top 84%)9233(Top 81%)9233(Top 765%)
40K24.85 mi0.85 mi21904+448841+88841+820968(Top 79%)8585(Top 75%)8585(Top 711%)
25.2M25.20 mi0.35 mi21893+118843-28843-220978(Top 79%)8584(Top 75%)8584(Top 711%)
Finish26.22 mi1.02 mi21875+188842+18842+121270(Top 80%)8702(Top 76%)8702(Top 721%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 81%
×21story building
+97ft-345ft

Overall

21513

Females

8508

F50-54

8508

5K→10K

3.1 - 6.2 mi

Top 82%
×5story building
+79ft-138ft

Overall

21912

Females

8777

F50-54

8777

10K→15K

6.2 - 9.3 mi

Top 81%
×3story building
+67ft-78ft

Overall

21513

Females

8508

F50-54

8508

15K→20K

9.3 - 12.4 mi

Top 81%
×5story building
+106ft-86ft

Overall

21492

Females

8523

F50-54

8523

20K→Half

12.4 - 13.1 mi

Top 82%
×2story building
+19ft-37ft

Overall

21851

Females

8712

F50-54

8712

Half→25K

13.1 - 15.5 mi

Top 80%
×4story building
+66ft-88ft

Overall

21348

Females

8467

F50-54

8467

25K→30K

15.5 - 18.6 mi

Top 80%
×9story building
+181ft-148ft

Overall

21333

Females

8536

F50-54

8536

30K→20M

18.6 - 20.0 mi

Top 82%
×5story building
+64ft-50ft

Overall

21735

Females

8835

F50-54

8835

20M→21M

20.0 - 21.0 mi

Top 84%
×8story building
+106ft-24ft

Overall

22425

Females

9238

F50-54

9238

21M→35K

21.0 - 21.8 mi

Top 85%
×7story building
+17ft-86ft

Overall

22741

Females

9446

F50-54

9446

35K→23M

21.8 - 23.0 mi

Top 84%
×5story building
+23ft-63ft

Overall

22289

Females

9210

F50-54

9210

23M→24M

23.0 - 24.0 mi

Top 84%
×6story building
+12ft-82ft

Overall

22239

Females

9233

F50-54

9233

24M→40K

24.0 - 24.9 mi

Top 79%
×1story
+6ft-20ft

Overall

20968

Females

8585

F50-54

8585

40K→25.2M

24.9 - 25.2 mi

Top 79%
×1story
+13ft-16ft

Overall

20978

Females

8584

F50-54

8584

25.2M→Finish

25.2 - 26.2 mi

Top 80%
×2story building
+22ft-21ft

Overall

21270

Females

8702

F50-54

8702

Passing Analysis

Category:
Athletes Passed
2028
Passed By
648
Net Change
+1380
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23255
5K → 10K67543+632#23255#22623
10K → 15K37431+343#22623#22280
15K → 20K25239+213#22280#22067
20K → Half3521+14#22067#22053
Half → 25K15933+126#22053#21927
25K → 30K21176+135#21927#21792
30K → 20M6369-6#21792#21798
20M → 21M3899-61#21798#21859
21M → 35K865-57#21859#21916
35K → 23M5176-25#21916#21941
23M → 24M3744-7#21941#21948
24M → 40K5713+44#21948#21904
40K → 25.2M2312+11#21904#21893
25.2M → Finish4527+18#21893#21875
TOTALS2028648+1380
📊

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