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BOSTON MARATHON 2023

Leslie Johnson

Bib: 21581•F

AR

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
8:51/mi
27:30
↑ 97↓ 3451.5%
10K· 6.21 mi
8:58/mi
55:21
↑ 79↓ 1380.4%
15K· 9.32 mi
9:33/mi
1:25:01
↑ 67↓ 78
20K· 12.43 mi
9:18/mi
1:53:56
↑ 106↓ 860.1%
Half· 13.11 mi
9:13/mi
2:00:13
↑ 19↓ 370.5%
25K· 15.53 mi
9:40/mi
2:23:39
↑ 66↓ 880.2%
30K· 18.64 mi
9:58/mi
2:54:38
↑ 181↓ 1480.2%
20M
10:14/mi
3:08:32
↑ 64↓ 500.2%
21M
10:56/mi
3:19:28
↑ 106↓ 241.6%
35K· 21.75 mi
9:51/mi
3:26:50
↑ 17↓ 861.7%
23M
10:09/mi
3:39:32
↑ 23↓ 630.6%
24M
10:08/mi
3:49:40
↓ 821.3%
40K· 24.85 mi
10:15/mi
3:58:26
↓ 200.3%
25.2M
9:49/mi
4:01:49
↑ 13↓ 160.2%
Finish· 26.22 mi
9:07/mi
4:11:06
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:00:13
Pace9:10 /mi
2nd Half
Distance13.11 mi
Time2:10:53
Pace9:59 /mi
📊Positive Split: 8.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:2227:308:5127:30
8:51
-
10K
6.21 mi11:48:1355:218:5427:51
8:58
+0:07
15K
9.32 mi12:17:531:25:019:0729:40
9:33
+0:35
20K
12.43 mi12:46:481:53:569:1028:55
9:18
-0:15
Half
13.11 mi12:53:052:00:139:106:17
9:13
-0:05
25K
15.53 mi13:16:312:23:399:1523:26
9:40
+0:27
30K
18.64 mi13:47:302:54:389:2230:59
9:58
+0:18
20M
20.00 mi14:01:243:08:329:2613:54
10:14
+0:16
21M
21.00 mi14:12:203:19:289:3010:56
10:56
+0:42
35K
21.75 mi14:19:423:26:509:317:22
9:51
-1:05
23M
23.00 mi14:32:243:39:329:3312:42
10:09
+0:18
24M
24.00 mi14:42:323:49:409:3410:08
10:08
-0:01
40K
24.85 mi14:51:183:58:269:368:46
10:15
+0:07
25.2M
25.20 mi14:54:414:01:499:363:23
9:49
-0:26
Finish
26.22 mi15:03:584:11:069:359:17
9:07
-0:42

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

8:51 /mi

Average Pace

9:35 /mi

Slowest Pace

10:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:39:50

40% of race

Time at Steady Pace

1:34:50

38% of race

Time at Slower Pace

56:26

22% of race

Average Pace: 9:35 /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 mi11:20:2227:308:5127:30
8:51
#19758
10K
6.21 mi11:48:1355:218:5427:51
8:58
#20253
15K
9.32 mi12:17:531:25:019:0729:40
9:33
#21116
20K
12.43 mi12:46:481:53:569:1028:55
9:18
#21063
Half
13.11 mi12:53:052:00:139:106:17
9:13
#21082
25K
15.53 mi13:16:312:23:399:1523:26
9:40
#21111
30K
18.64 mi13:47:302:54:389:2230:59
9:58
#21074
20M
20.00 mi14:01:243:08:329:2613:54
10:14
#21052
21M
21.00 mi14:12:203:19:289:3010:56
10:56
#21025
35K
21.75 mi14:19:423:26:509:317:22
9:51
#21012
23M
23.00 mi14:32:243:39:329:3312:42
10:09
#20944
24M
24.00 mi14:42:323:49:409:3410:08
10:08
#20952
40K
24.85 mi14:51:183:58:269:368:46
10:15
#20924
25.2M
25.20 mi14:54:414:01:499:363:23
9:49
#20857
Finish
26.22 mi15:03:584:11:069:359:17
9:07
#20781
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi197587672767222389(Top 84%)9004(Top 79%)9004(Top 746%)
10K6.21 mi3.10 mi20253-4957896-2247896-22420734(Top 78%)8113(Top 71%)8113(Top 672%)
15K9.32 mi3.11 mi21116-8638344-4488344-44822389(Top 84%)9004(Top 79%)9004(Top 746%)
20K12.43 mi3.11 mi21063+538312+328312+3221001(Top 79%)8232(Top 72%)8232(Top 682%)
Half13.11 mi0.68 mi21082-198315-38315-321220(Top 80%)8368(Top 73%)8368(Top 693%)
25K15.53 mi2.42 mi21111-298331-168331-1621344(Top 80%)8463(Top 74%)8463(Top 701%)
30K18.64 mi3.11 mi21074+378328+38328+320957(Top 79%)8321(Top 73%)8321(Top 689%)
20M20.00 mi1.36 mi21052+228326+28326+221098(Top 79%)8466(Top 74%)8466(Top 701%)
21M21.00 mi1.00 mi21025+278329-38329-320692(Top 78%)8288(Top 73%)8288(Top 687%)
35K21.75 mi0.75 mi21012+138334-58334-520888(Top 78%)8430(Top 74%)8430(Top 698%)
23M23.00 mi1.25 mi20944+688309+258309+2520423(Top 77%)8186(Top 72%)8186(Top 678%)
24M24.00 mi1.00 mi20952-88318-98318-921159(Top 79%)8645(Top 76%)8645(Top 716%)
40K24.85 mi0.85 mi20924+288313+58313+520632(Top 77%)8404(Top 74%)8404(Top 696%)
25.2M25.20 mi0.35 mi20857+678280+338280+3316693(Top 63%)6282(Top 55%)6282(Top 520%)
Finish26.22 mi1.02 mi20781+768247+338247+3318542(Top 70%)7200(Top 63%)7200(Top 597%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 84%
×21story building
+97ft-345ft

Overall

22389

Females

9004

F50-54

9004

5K→10K

3.1 - 6.2 mi

Top 78%
×5story building
+79ft-138ft

Overall

20734

Females

8113

F50-54

8113

10K→15K

6.2 - 9.3 mi

Top 84%
×3story building
+67ft-78ft

Overall

22389

Females

9004

F50-54

9004

15K→20K

9.3 - 12.4 mi

Top 79%
×5story building
+106ft-86ft

Overall

21001

Females

8232

F50-54

8232

20K→Half

12.4 - 13.1 mi

Top 80%
×2story building
+19ft-37ft

Overall

21220

Females

8368

F50-54

8368

Half→25K

13.1 - 15.5 mi

Top 80%
×4story building
+66ft-88ft

Overall

21344

Females

8463

F50-54

8463

25K→30K

15.5 - 18.6 mi

Top 79%
×9story building
+181ft-148ft

Overall

20957

Females

8321

F50-54

8321

30K→20M

18.6 - 20.0 mi

Top 79%
×5story building
+64ft-50ft

Overall

21098

Females

8466

F50-54

8466

20M→21M

20.0 - 21.0 mi

Top 78%
×8story building
+106ft-24ft

Overall

20692

Females

8288

F50-54

8288

21M→35K

21.0 - 21.8 mi

Top 78%
×7story building
+17ft-86ft

Overall

20888

Females

8430

F50-54

8430

35K→23M

21.8 - 23.0 mi

Top 77%
×5story building
+23ft-63ft

Overall

20423

Females

8186

F50-54

8186

23M→24M

23.0 - 24.0 mi

Top 79%
×6story building
+12ft-82ft

Overall

21159

Females

8645

F50-54

8645

24M→40K

24.0 - 24.9 mi

Top 77%
×1story
+6ft-20ft

Overall

20632

Females

8404

F50-54

8404

40K→25.2M

24.9 - 25.2 mi

Top 63%
×1story
+13ft-16ft

Overall

16693

Females

6282

F50-54

6282

25.2M→Finish

25.2 - 26.2 mi

Top 70%
×2story building
+22ft-21ft

Overall

18542

Females

7200

F50-54

7200

Passing Analysis

Category:
Athletes Passed
1141
Passed By
2164
Net Change
-1023
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19758
5K → 10K123618-495#19758#20253
10K → 15K22885-863#20253#21116
15K → 20K168115+53#21116#21063
20K → Half2443-19#21063#21082
Half → 25K92121-29#21082#21111
25K → 30K156119+37#21111#21074
30K → 20M8058+22#21074#21052
20M → 21M7750+27#21052#21025
21M → 35K4633+13#21025#21012
35K → 23M10436+68#21012#20944
23M → 24M4755-8#20944#20952
24M → 40K5022+28#20952#20924
40K → 25.2M681+67#20924#20857
25.2M → Finish848+76#20857#20781
TOTALS11412164-1023
📊

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