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BOSTON MARATHON 2023

David Liptrot

Bib: 10525•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M45-49)
#0 / 2252
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
7:36/mi
23:36
↑ 97↓ 3451.5%
10K· 6.21 mi
7:44/mi
47:37
↑ 79↓ 1380.4%
15K· 9.32 mi
7:47/mi
1:11:48
↑ 67↓ 78
20K· 12.43 mi
7:53/mi
1:36:19
↑ 106↓ 860.1%
Half· 13.11 mi
7:50/mi
1:41:40
↑ 19↓ 370.5%
25K· 15.53 mi
8:12/mi
2:01:32
↑ 66↓ 880.2%
30K· 18.64 mi
9:26/mi
2:30:51
↑ 181↓ 1480.2%
20M
11:02/mi
2:45:50
↑ 64↓ 500.2%
21M
12:06/mi
2:57:56
↑ 106↓ 241.6%
35K· 21.75 mi
10:47/mi
3:06:00
↑ 17↓ 861.7%
23M
11:28/mi
3:20:21
↑ 23↓ 630.6%
24M
11:42/mi
3:32:03
↓ 821.3%
40K· 24.85 mi
13:22/mi
3:43:29
↓ 200.3%
25.2M
13:38/mi
3:48:11
↑ 13↓ 160.2%
Finish· 26.22 mi
11:05/mi
3:59:29
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:40
Pace7:45 /mi
2nd Half
Distance13.11 mi
Time2:17:49
Pace10:31 /mi
📊Positive Split: 35.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:4323:367:3623:36
7:36
-
10K
6.21 mi11:13:4447:377:4024:01
7:44
+0:08
15K
9.32 mi11:37:551:11:487:4224:11
7:47
+0:03
20K
12.43 mi12:02:261:36:197:4524:31
7:53
+0:06
Half
13.11 mi12:07:471:41:407:455:21
7:50
-0:03
25K
15.53 mi12:27:392:01:327:4919:52
8:12
+0:22
30K
18.64 mi12:56:582:30:518:0629:19
9:26
+1:14
20M
20.00 mi13:11:572:45:508:1714:59
11:02
+1:36
21M
21.00 mi13:24:032:57:568:2812:06
12:06
+1:04
35K
21.75 mi13:32:073:06:008:338:04
10:47
-1:19
23M
23.00 mi13:46:283:20:218:4314:21
11:28
+0:41
24M
24.00 mi13:58:103:32:038:5011:42
11:42
+0:14
40K
24.85 mi14:09:363:43:298:5911:26
13:22
+1:40
25.2M
25.20 mi14:14:183:48:119:034:42
13:38
+0:16
Finish
26.22 mi14:25:363:59:299:0811:18
11:05
-2:33

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

7:36 /mi

Average Pace

9:08 /mi

Slowest Pace

13:38 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:30:51

63% of race

Time at Steady Pace

1:00:24

25% of race

Time at Slower Pace

28:14

12% of race

Average Pace: 9:08 /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 mi10:49:4323:367:3623:36
7:36
#10502
10K
6.21 mi11:13:4447:377:4024:01
7:44
#11457
15K
9.32 mi11:37:551:11:487:4224:11
7:47
#11815
20K
12.43 mi12:02:261:36:197:4524:31
7:53
#11967
Half
13.11 mi12:07:471:41:407:455:21
7:50
#12026
25K
15.53 mi12:27:392:01:327:4919:52
8:12
#12379
30K
18.64 mi12:56:582:30:518:0629:19
9:26
#14045
20M
20.00 mi13:11:572:45:508:1714:59
11:02
#15178
21M
21.00 mi13:24:032:57:568:2812:06
12:06
#16011
35K
21.75 mi13:32:073:06:008:338:04
10:47
#16457
23M
23.00 mi13:46:283:20:218:4314:21
11:28
#17241
24M
24.00 mi13:58:103:32:038:5011:42
11:42
#17917
40K
24.85 mi14:09:363:43:298:5911:26
13:22
#18613
25.2M
25.20 mi14:14:183:48:119:034:42
13:38
#18834
Finish
26.22 mi14:25:363:59:299:0811:18
11:05
#19223
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi105028414841412589(Top 47%)9347(Top 62%)9347(Top 415%)
10K6.21 mi3.10 mi11457-9558863-4498863-44912510(Top 47%)9343(Top 62%)9343(Top 415%)
15K9.32 mi3.11 mi11815-3589009-1469009-14612589(Top 47%)9347(Top 62%)9347(Top 415%)
20K12.43 mi3.11 mi11967-1529058-499058-4912544(Top 47%)9252(Top 61%)9252(Top 411%)
Half13.11 mi0.68 mi12026-599078-209078-2013092(Top 49%)9549(Top 63%)9549(Top 424%)
25K15.53 mi2.42 mi12379-3539205-1279205-12714180(Top 53%)9843(Top 65%)9843(Top 437%)
30K18.64 mi3.11 mi14045-16669854-6499854-64919191(Top 72%)11870(Top 78%)11870(Top 527%)
20M20.00 mi1.36 mi15178-113310268-41410268-41422740(Top 85%)13334(Top 88%)13334(Top 592%)
21M21.00 mi1.00 mi16011-83310568-30010568-30022898(Top 86%)13379(Top 88%)13379(Top 594%)
35K21.75 mi0.75 mi16457-44610745-17710745-17722877(Top 86%)13320(Top 88%)13320(Top 591%)
23M23.00 mi1.25 mi17241-78411055-31011055-31023173(Top 87%)13468(Top 89%)13468(Top 598%)
24M24.00 mi1.00 mi17917-67611322-26711322-26724125(Top 91%)13873(Top 91%)13873(Top 616%)
40K24.85 mi0.85 mi18613-69611606-28411606-28425247(Top 95%)14426(Top 95%)14426(Top 641%)
25.2M25.20 mi0.35 mi18834-22111693-8711693-8724634(Top 93%)14101(Top 93%)14101(Top 626%)
Finish26.22 mi1.02 mi19223-38911863-17011863-17024116(Top 91%)13873(Top 91%)13873(Top 616%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 47%
×21story building
+97ft-345ft

Overall

12589

Males

9347

M45-49

9347

5K→10K

3.1 - 6.2 mi

Top 47%
×5story building
+79ft-138ft

Overall

12510

Males

9343

M45-49

9343

10K→15K

6.2 - 9.3 mi

Top 47%
×3story building
+67ft-78ft

Overall

12589

Males

9347

M45-49

9347

15K→20K

9.3 - 12.4 mi

Top 47%
×5story building
+106ft-86ft

Overall

12544

Males

9252

M45-49

9252

20K→Half

12.4 - 13.1 mi

Top 49%
×2story building
+19ft-37ft

Overall

13092

Males

9549

M45-49

9549

Half→25K

13.1 - 15.5 mi

Top 53%
×4story building
+66ft-88ft

Overall

14180

Males

9843

M45-49

9843

25K→30K

15.5 - 18.6 mi

Top 72%
×9story building
+181ft-148ft

Overall

19191

Males

11870

M45-49

11870

30K→20M

18.6 - 20.0 mi

Top 85%
×5story building
+64ft-50ft

Overall

22740

Males

13334

M45-49

13334

20M→21M

20.0 - 21.0 mi

Top 86%
×8story building
+106ft-24ft

Overall

22898

Males

13379

M45-49

13379

21M→35K

21.0 - 21.8 mi

Top 86%
×7story building
+17ft-86ft

Overall

22877

Males

13320

M45-49

13320

35K→23M

21.8 - 23.0 mi

Top 87%
×5story building
+23ft-63ft

Overall

23173

Males

13468

M45-49

13468

23M→24M

23.0 - 24.0 mi

Top 91%
×6story building
+12ft-82ft

Overall

24125

Males

13873

M45-49

13873

24M→40K

24.0 - 24.9 mi

Top 95%
×1story
+6ft-20ft

Overall

25247

Males

14426

M45-49

14426

40K→25.2M

24.9 - 25.2 mi

Top 93%
×1story
+13ft-16ft

Overall

24634

Males

14101

M45-49

14101

25.2M→Finish

25.2 - 26.2 mi

Top 91%
×2story building
+22ft-21ft

Overall

24116

Males

13873

M45-49

13873

Passing Analysis

Category:
Athletes Passed
372
Passed By
9093
Net Change
-8721
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10502
5K → 10K641019-955#10502#11457
10K → 15K81439-358#11457#11815
15K → 20K118270-152#11815#11967
20K → Half766-59#11967#12026
Half → 25K50403-353#12026#12379
25K → 30K111677-1666#12379#14045
30K → 20M31136-1133#14045#15178
20M → 21M3836-833#15178#16011
21M → 35K5451-446#16011#16457
35K → 23M8792-784#16457#17241
23M → 24M6682-676#17241#17917
24M → 40K4700-696#17917#18613
40K → 25.2M7228-221#18613#18834
25.2M → Finish5394-389#18834#19223
TOTALS3729093-8721
📊

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