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BOSTON MARATHON 2023

Lenora Sampson

Bib: 21773•F

MD

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Top 48%
Division (F45-49)
#0 / 1817
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:00
Rank: #16657
Start → 5K
26:00 | 8:22/mi
10K· 6.21 mi
51:38
Rank: #16587 (+70)
5K → 10K
25:38 | 8:15/mi
15K· 9.32 mi
1:17:37
Rank: #16712 (-125)
10K → 15K
25:59 | 8:22/mi
20K· 12.43 mi
1:44:15
Rank: #16855 (-143)
15K → 20K
26:38 | 8:34/mi
Half· 13.11 mi
1:50:01
Rank: #16898 (-43)
20K → Half
5:46 | 8:27/mi
25K· 15.53 mi
2:11:14
Rank: #17032 (-134)
Half → 25K
21:13 | 8:45/mi
30K· 18.64 mi
2:39:53
Rank: #17222 (-190)
25K → 30K
28:39 | 9:13/mi
20M
2:53:13
Rank: #17497 (-275)
30K → 20M
13:20 | 9:49/mi
21M
3:03:02
Rank: #17482 (+15)
20M → 21M
9:49 | 9:49/mi
35K· 21.75 mi
3:09:47
Rank: #17505 (-23)
21M → 35K
6:45 | 9:01/mi
23M
3:21:33
Rank: #17530 (-25)
35K → 23M
11:46 | 9:24/mi
24M
3:30:33
Rank: #17540 (-10)
23M → 24M
9:00 | 9:00/mi
40K· 24.85 mi
3:38:38
Rank: #17601 (-61)
24M → 40K
8:05 | 9:27/mi
25.2M
3:42:04
Rank: #17593 (+8)
40K → 25.2M
3:26 | 9:57/mi
Finish· 26.22 mi
3:51:16
Rank: #17626 (-33)
25.2M → Finish
9:12 | 9:02/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:50:01
Pace8:24 /mi
2nd Half
Distance13.11 mi
Time2:01:15
Pace9:15 /mi
📊Positive Split: 10.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:1726:008:2226:00
8:22
-
10K
6.21 mi11:44:5551:388:1925:38
8:15
-0:07
15K
9.32 mi12:10:541:17:378:2025:59
8:22
+0:07
20K
12.43 mi12:37:321:44:158:2326:38
8:34
+0:12
Half
13.11 mi12:43:181:50:018:245:46
8:27
-0:07
25K
15.53 mi13:04:312:11:148:2721:13
8:45
+0:18
30K
18.64 mi13:33:102:39:538:3528:39
9:13
+0:28
20M
20.00 mi13:46:302:53:138:4013:20
9:49
+0:36
21M
21.00 mi13:56:193:03:028:439:49
9:49
0:00
35K
21.75 mi14:03:043:09:478:446:45
9:01
-0:48
23M
23.00 mi14:14:503:21:338:4611:46
9:24
+0:23
24M
24.00 mi14:23:503:30:338:469:00
9:00
-0:24
40K
24.85 mi14:31:553:38:388:488:05
9:27
+0:27
25.2M
25.20 mi14:35:213:42:048:493:26
9:57
+0:30
Finish
26.22 mi14:44:333:51:168:509:12
9:02
-0:55

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

8:15 /mi

Average Pace

8:50 /mi

Slowest Pace

9:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:50:01

48% of race

Time at Steady Pace

1:14:49

32% of race

Time at Slower Pace

46:26

20% of race

Average Pace: 8:49 /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 mi11:19:1726:008:2226:00
8:22
#16657
10K
6.21 mi11:44:5551:388:1925:38
8:15
#16587
15K
9.32 mi12:10:541:17:378:2025:59
8:22
#16712
20K
12.43 mi12:37:321:44:158:2326:38
8:34
#16855
Half
13.11 mi12:43:181:50:018:245:46
8:27
#16898
25K
15.53 mi13:04:312:11:148:2721:13
8:45
#17032
30K
18.64 mi13:33:102:39:538:3528:39
9:13
#17222
20M
20.00 mi13:46:302:53:138:4013:20
9:49
#17497
21M
21.00 mi13:56:193:03:028:439:49
9:49
#17482
35K
21.75 mi14:03:043:09:478:446:45
9:01
#17505
23M
23.00 mi14:14:503:21:338:4611:46
9:24
#17530
24M
24.00 mi14:23:503:30:338:469:00
9:00
#17540
40K
24.85 mi14:31:553:38:388:488:05
9:27
#17601
25.2M
25.20 mi14:35:213:42:048:493:26
9:57
#17593
Finish
26.22 mi14:44:333:51:168:509:12
9:02
#17626
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi166575705570516950(Top 64%)5880(Top 51%)5880(Top 324%)
10K6.21 mi3.10 mi16587+705634+715634+7116602(Top 62%)5641(Top 49%)5641(Top 310%)
15K9.32 mi3.11 mi16712-1255740-1065740-10616950(Top 64%)5880(Top 51%)5880(Top 324%)
20K12.43 mi3.11 mi16855-1435839-995839-9917320(Top 65%)6120(Top 54%)6120(Top 337%)
Half13.11 mi0.68 mi16898-435865-265865-2617506(Top 66%)6189(Top 54%)6189(Top 341%)
25K15.53 mi2.42 mi17032-1345966-1015966-10117680(Top 66%)6388(Top 56%)6388(Top 352%)
30K18.64 mi3.11 mi17222-1906091-1256091-12518264(Top 69%)6797(Top 60%)6797(Top 374%)
20M20.00 mi1.36 mi17497-2756277-1866277-18619916(Top 75%)7810(Top 68%)7810(Top 430%)
21M21.00 mi1.00 mi17482+156282-56282-517294(Top 65%)6370(Top 56%)6370(Top 351%)
35K21.75 mi0.75 mi17505-236311-296311-2918013(Top 68%)6844(Top 60%)6844(Top 377%)
23M23.00 mi1.25 mi17530-256339-286339-2817941(Top 67%)6831(Top 60%)6831(Top 376%)
24M24.00 mi1.00 mi17540-106356-176356-1717254(Top 65%)6492(Top 57%)6492(Top 357%)
40K24.85 mi0.85 mi17601-616405-496405-4918185(Top 68%)7040(Top 62%)7040(Top 387%)
25.2M25.20 mi0.35 mi17593+86407-26407-217237(Top 65%)6563(Top 57%)6563(Top 361%)
Finish26.22 mi1.02 mi17626-336432-256432-2518126(Top 68%)6964(Top 61%)6964(Top 383%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 64%
×21stories
+97ft-345ft

Overall

16950

Females

5880

F45-49

5880

5K→10K

3.1 - 6.2 mi

Top 62%
×5stories
+79ft-138ft

Overall

16602

Females

5641

F45-49

5641

10K→15K

6.2 - 9.3 mi

Top 64%
×3stories
+67ft-78ft

Overall

16950

Females

5880

F45-49

5880

15K→20K

9.3 - 12.4 mi

Top 65%
×5stories
+106ft-86ft

Overall

17320

Females

6120

F45-49

6120

20K→Half

12.4 - 13.1 mi

Top 66%
×2stories
+19ft-37ft

Overall

17506

Females

6189

F45-49

6189

Half→25K

13.1 - 15.5 mi

Top 66%
×4stories
+66ft-88ft

Overall

17680

Females

6388

F45-49

6388

25K→30K

15.5 - 18.6 mi

Top 69%
×9stories
+181ft-148ft

Overall

18264

Females

6797

F45-49

6797

30K→20M

18.6 - 20.0 mi

Top 75%
×5stories
+64ft-50ft

Overall

19916

Females

7810

F45-49

7810

20M→21M

20.0 - 21.0 mi

Top 65%
×8stories
+106ft-24ft

Overall

17294

Females

6370

F45-49

6370

21M→35K

21.0 - 21.8 mi

Top 68%
×7stories
+17ft-86ft

Overall

18013

Females

6844

F45-49

6844

35K→23M

21.8 - 23.0 mi

Top 67%
×5stories
+23ft-63ft

Overall

17941

Females

6831

F45-49

6831

23M→24M

23.0 - 24.0 mi

Top 65%
×6stories
+12ft-82ft

Overall

17254

Females

6492

F45-49

6492

24M→40K

24.0 - 24.9 mi

Top 68%
×1story
+6ft-20ft

Overall

18185

Females

7040

F45-49

7040

40K→25.2M

24.9 - 25.2 mi

Top 65%
×1story
+13ft-16ft

Overall

17237

Females

6563

F45-49

6563

25.2M→Finish

25.2 - 26.2 mi

Top 68%
×2stories
+22ft-21ft

Overall

18126

Females

6964

F45-49

6964

Passing Analysis

Category:
Athletes Passed
1267
Passed By
2236
Net Change
-969
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16657
5K → 10K342272+70#16657#16587
10K → 15K154279-125#16587#16712
15K → 20K131274-143#16712#16855
20K → Half1558-43#16855#16898
Half → 25K79213-134#16898#17032
25K → 30K120310-190#17032#17222
30K → 20M35310-275#17222#17497
20M → 21M8974+15#17497#17482
21M → 35K4467-23#17482#17505
35K → 23M80105-25#17505#17530
23M → 24M5363-10#17530#17540
24M → 40K40101-61#17540#17601
40K → 25.2M3527+8#17601#17593
25.2M → Finish5083-33#17593#17626
TOTALS12672236-969
📊

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