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BOSTON MARATHON 2023

David Leiper

Bib: 31546•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M50-54)
#0 / 2052
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
8:45/mi
27:10
↑ 97↓ 3451.5%
10K· 6.21 mi
8:24/mi
53:17
↑ 79↓ 1380.4%
15K· 9.32 mi
8:38/mi
1:20:06
↑ 67↓ 78
20K· 12.43 mi
8:38/mi
1:46:56
↑ 106↓ 860.1%
Half· 13.11 mi
8:37/mi
1:52:49
↑ 19↓ 370.5%
25K· 15.53 mi
8:48/mi
2:14:09
↑ 66↓ 880.2%
30K· 18.64 mi
9:10/mi
2:42:39
↑ 181↓ 1480.2%
20M
9:21/mi
2:55:21
↑ 64↓ 500.2%
21M
9:56/mi
3:05:17
↑ 106↓ 241.6%
35K· 21.75 mi
9:11/mi
3:12:09
↑ 17↓ 861.7%
23M
9:37/mi
3:24:12
↑ 23↓ 630.6%
24M
9:24/mi
3:33:36
↓ 821.3%
40K· 24.85 mi
9:38/mi
3:41:50
↓ 200.3%
25.2M
10:32/mi
3:45:28
↑ 13↓ 160.2%
Finish· 26.22 mi
9:21/mi
3:55:00
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:52:49
Pace8:36 /mi
2nd Half
Distance13.11 mi
Time2:02:11
Pace9:19 /mi
📊Positive Split: 8.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:4527:108:4527:10
8:45
-
10K
6.21 mi12:12:5253:178:3526:07
8:24
-0:21
15K
9.32 mi12:39:411:20:068:3626:49
8:38
+0:14
20K
12.43 mi13:06:311:46:568:3626:50
8:38
0:00
Half
13.11 mi13:12:241:52:498:365:53
8:37
-0:01
25K
15.53 mi13:33:442:14:098:3821:20
8:48
+0:11
30K
18.64 mi14:02:142:42:398:4428:30
9:10
+0:22
20M
20.00 mi14:14:562:55:218:4612:42
9:21
+0:11
21M
21.00 mi14:24:523:05:178:499:56
9:56
+0:35
35K
21.75 mi14:31:443:12:098:506:52
9:11
-0:45
23M
23.00 mi14:43:473:24:128:5312:03
9:37
+0:26
24M
24.00 mi14:53:113:33:368:549:24
9:24
-0:13
40K
24.85 mi15:01:253:41:508:568:14
9:38
+0:14
25.2M
25.20 mi15:05:033:45:288:573:38
10:32
+0:54
Finish
26.22 mi15:14:353:55:008:589:32
9:21
-1:11

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

8:24 /mi

Average Pace

8:58 /mi

Slowest Pace

10:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:14:09

57% of race

Time at Steady Pace

1:07:00

29% of race

Time at Slower Pace

33:51

14% of race

Average Pace: 8:58 /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 mi11:46:4527:108:4527:10
8:45
#19138
10K
6.21 mi12:12:5253:178:3526:07
8:24
#18365
15K
9.32 mi12:39:411:20:068:3626:49
8:38
#18448
20K
12.43 mi13:06:311:46:568:3626:50
8:38
#18230
Half
13.11 mi13:12:241:52:498:365:53
8:37
#18244
25K
15.53 mi13:33:442:14:098:3821:20
8:48
#18176
30K
18.64 mi14:02:142:42:398:4428:30
9:10
#18131
20M
20.00 mi14:14:562:55:218:4612:42
9:21
#18143
21M
21.00 mi14:24:523:05:178:499:56
9:56
#18098
35K
21.75 mi14:31:443:12:098:506:52
9:11
#18136
23M
23.00 mi14:43:473:24:128:5312:03
9:37
#18198
24M
24.00 mi14:53:113:33:368:549:24
9:24
#18237
40K
24.85 mi15:01:253:41:508:568:14
9:38
#18284
25.2M
25.20 mi15:05:033:45:288:573:38
10:32
#18301
Finish
26.22 mi15:14:353:55:008:589:32
9:21
#18376
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi19138118331183318622(Top 70%)11731(Top 77%)11731(Top 572%)
10K6.21 mi3.10 mi18365+77311609+22411609+22417613(Top 66%)11345(Top 75%)11345(Top 553%)
15K9.32 mi3.11 mi18448-8311647-3811647-3818622(Top 70%)11731(Top 77%)11731(Top 572%)
20K12.43 mi3.11 mi18230+21811561+8611561+8617715(Top 67%)11346(Top 75%)11346(Top 553%)
Half13.11 mi0.68 mi18244-1411564-311564-318433(Top 69%)11672(Top 77%)11672(Top 569%)
25K15.53 mi2.42 mi18176+6811519+4511519+4517933(Top 67%)11389(Top 75%)11389(Top 555%)
30K18.64 mi3.11 mi18131+4511462+5711462+5718042(Top 68%)11346(Top 75%)11346(Top 553%)
20M20.00 mi1.36 mi18143-1211459+311459+318204(Top 68%)11331(Top 75%)11331(Top 552%)
21M21.00 mi1.00 mi18098+4511424+3511424+3517773(Top 67%)11132(Top 73%)11132(Top 542%)
35K21.75 mi0.75 mi18136-3811429-511429-518641(Top 70%)11434(Top 75%)11434(Top 557%)
23M23.00 mi1.25 mi18198-6211452-2311452-2318808(Top 71%)11487(Top 76%)11487(Top 560%)
24M24.00 mi1.00 mi18237-3911455-311455-318837(Top 71%)11461(Top 76%)11461(Top 559%)
40K24.85 mi0.85 mi18284-47114551145518783(Top 71%)11385(Top 75%)11385(Top 555%)
25.2M25.20 mi0.35 mi18301-1711461-611461-619179(Top 72%)11551(Top 76%)11551(Top 563%)
Finish26.22 mi1.02 mi18376-7511487-2611487-2619582(Top 74%)11788(Top 78%)11788(Top 574%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21story building
+97ft-345ft

Overall

18622

Males

11731

M50-54

11731

5K→10K

3.1 - 6.2 mi

Top 66%
×5story building
+79ft-138ft

Overall

17613

Males

11345

M50-54

11345

10K→15K

6.2 - 9.3 mi

Top 70%
×3story building
+67ft-78ft

Overall

18622

Males

11731

M50-54

11731

15K→20K

9.3 - 12.4 mi

Top 67%
×5story building
+106ft-86ft

Overall

17715

Males

11346

M50-54

11346

20K→Half

12.4 - 13.1 mi

Top 69%
×2story building
+19ft-37ft

Overall

18433

Males

11672

M50-54

11672

Half→25K

13.1 - 15.5 mi

Top 67%
×4story building
+66ft-88ft

Overall

17933

Males

11389

M50-54

11389

25K→30K

15.5 - 18.6 mi

Top 68%
×9story building
+181ft-148ft

Overall

18042

Males

11346

M50-54

11346

30K→20M

18.6 - 20.0 mi

Top 68%
×5story building
+64ft-50ft

Overall

18204

Males

11331

M50-54

11331

20M→21M

20.0 - 21.0 mi

Top 67%
×8story building
+106ft-24ft

Overall

17773

Males

11132

M50-54

11132

21M→35K

21.0 - 21.8 mi

Top 70%
×7story building
+17ft-86ft

Overall

18641

Males

11434

M50-54

11434

35K→23M

21.8 - 23.0 mi

Top 71%
×5story building
+23ft-63ft

Overall

18808

Males

11487

M50-54

11487

23M→24M

23.0 - 24.0 mi

Top 71%
×6story building
+12ft-82ft

Overall

18837

Males

11461

M50-54

11461

24M→40K

24.0 - 24.9 mi

Top 71%
×1story
+6ft-20ft

Overall

18783

Males

11385

M50-54

11385

40K→25.2M

24.9 - 25.2 mi

Top 72%
×1story
+13ft-16ft

Overall

19179

Males

11551

M50-54

11551

25.2M→Finish

25.2 - 26.2 mi

Top 74%
×2story building
+22ft-21ft

Overall

19582

Males

11788

M50-54

11788

Passing Analysis

Category:
Athletes Passed
2141
Passed By
1379
Net Change
+762
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19138
5K → 10K899126+773#19138#18365
10K → 15K148231-83#18365#18448
15K → 20K28264+218#18448#18230
20K → Half2337-14#18230#18244
Half → 25K15991+68#18244#18176
25K → 30K210165+45#18176#18131
30K → 20M8597-12#18131#18143
20M → 21M12075+45#18143#18098
21M → 35K3876-38#18098#18136
35K → 23M54116-62#18136#18198
23M → 24M4180-39#18198#18237
24M → 40K4188-47#18237#18284
40K → 25.2M1633-17#18284#18301
25.2M → Finish25100-75#18301#18376
TOTALS21411379+762
📊

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