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BOSTON MARATHON 2023

Zachary Bernstein

Bib: 25649•M

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Division (M18-39)
#0 / 5285
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
9:09/mi
28:26
↑ 97↓ 3451.5%
10K· 6.21 mi
8:52/mi
55:59
↑ 79↓ 1380.4%
15K· 9.32 mi
8:36/mi
1:22:43
↑ 67↓ 78
20K· 12.43 mi
8:36/mi
1:49:27
↑ 106↓ 860.1%
Half· 13.11 mi
8:39/mi
1:55:21
↑ 19↓ 370.5%
25K· 15.53 mi
9:12/mi
2:17:39
↑ 66↓ 880.2%
30K· 18.64 mi
9:04/mi
2:45:50
↑ 181↓ 1480.2%
20M
8:59/mi
2:58:02
↑ 64↓ 500.2%
21M
10:02/mi
3:08:04
↑ 106↓ 241.6%
35K· 21.75 mi
8:43/mi
3:14:35
↑ 17↓ 861.7%
23M
9:37/mi
3:26:38
↑ 23↓ 630.6%
24M
9:13/mi
3:35:51
↓ 821.3%
40K· 24.85 mi
9:17/mi
3:43:47
↓ 200.3%
25.2M
9:20/mi
3:47:00
↑ 13↓ 160.2%
Finish· 26.22 mi
8:40/mi
3:55:50
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:55:21
Pace8:48 /mi
2nd Half
Distance13.11 mi
Time2:00:29
Pace9:11 /mi
📊Positive Split: 4.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:44:1428:269:0928:26
9:09
-
10K
6.21 mi12:11:4755:599:0127:33
8:52
-0:17
15K
9.32 mi12:38:311:22:438:5226:44
8:36
-0:16
20K
12.43 mi13:05:151:49:278:4826:44
8:36
0:00
Half
13.11 mi13:11:091:55:218:485:54
8:39
+0:03
25K
15.53 mi13:33:272:17:398:5222:18
9:12
+0:33
30K
18.64 mi14:01:382:45:508:5428:11
9:04
-0:08
20M
20.00 mi14:13:502:58:028:5412:12
8:59
-0:05
21M
21.00 mi14:23:523:08:048:5710:02
10:02
+1:03
35K
21.75 mi14:30:233:14:358:576:31
8:43
-1:19
23M
23.00 mi14:42:263:26:388:5912:03
9:37
+0:54
24M
24.00 mi14:51:393:35:519:009:13
9:13
-0:24
40K
24.85 mi14:59:353:43:479:007:56
9:17
+0:04
25.2M
25.20 mi15:02:483:47:009:003:13
9:20
+0:03
Finish
26.22 mi15:11:383:55:509:008:50
8:40
-0:40

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

8:36 /mi

Average Pace

9:00 /mi

Slowest Pace

10:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:33:45

91% of race

Time at Steady Pace

22:05

9% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:00 /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 mi11:44:1428:269:0928:26
9:09
#21042
10K
6.21 mi12:11:4755:599:0127:33
8:52
#20680
15K
9.32 mi12:38:311:22:438:5226:44
8:36
#19996
20K
12.43 mi13:05:151:49:278:4826:44
8:36
#19356
Half
13.11 mi13:11:091:55:218:485:54
8:39
#19314
25K
15.53 mi13:33:272:17:398:5222:18
9:12
#19410
30K
18.64 mi14:01:382:45:508:5428:11
9:04
#19082
20M
20.00 mi14:13:502:58:028:5412:12
8:59
#18878
21M
21.00 mi14:23:523:08:048:5710:02
10:02
#18833
35K
21.75 mi14:30:233:14:358:576:31
8:43
#18738
23M
23.00 mi14:42:263:26:388:5912:03
9:37
#18747
24M
24.00 mi14:51:393:35:519:009:13
9:13
#18719
40K
24.85 mi14:59:353:43:479:007:56
9:17
#18682
25.2M
25.20 mi15:02:483:47:009:003:13
9:20
#18607
Finish
26.22 mi15:11:383:55:509:008:50
8:40
#18525
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi21042126251262518467(Top 69%)11670(Top 77%)11670(Top 221%)
10K6.21 mi3.10 mi20680+36212523+10212523+10220252(Top 76%)12386(Top 82%)12386(Top 234%)
15K9.32 mi3.11 mi19996+68412238+28512238+28518467(Top 69%)11670(Top 77%)11670(Top 221%)
20K12.43 mi3.11 mi19356+64011994+24411994+24417514(Top 66%)11261(Top 74%)11261(Top 213%)
Half13.11 mi0.68 mi19314+4211981+1311981+1318574(Top 70%)11735(Top 77%)11735(Top 222%)
25K15.53 mi2.42 mi19410-9612025-4412025-4419819(Top 74%)12201(Top 80%)12201(Top 231%)
30K18.64 mi3.11 mi19082+32811878+14711878+14717542(Top 66%)11144(Top 73%)11144(Top 211%)
20M20.00 mi1.36 mi18878+20411768+11011768+11016411(Top 62%)10582(Top 70%)10582(Top 200%)
21M21.00 mi1.00 mi18833+4511739+2911739+2918143(Top 68%)11283(Top 74%)11283(Top 213%)
35K21.75 mi0.75 mi18738+9511697+4211697+4216454(Top 62%)10471(Top 69%)10471(Top 198%)
23M23.00 mi1.25 mi18747-911686+1111686+1118813(Top 71%)11492(Top 76%)11492(Top 217%)
24M24.00 mi1.00 mi18719+2811661+2511661+2518108(Top 68%)11131(Top 73%)11131(Top 211%)
40K24.85 mi0.85 mi18682+3711637+2411637+2417415(Top 65%)10764(Top 71%)10764(Top 204%)
25.2M25.20 mi0.35 mi18607+7511600+3711600+3714311(Top 54%)9404(Top 62%)9404(Top 178%)
Finish26.22 mi1.02 mi18525+8211553+4711553+4716328(Top 61%)10308(Top 68%)10308(Top 195%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 69%
×21story building
+97ft-345ft

Overall

18467

Males

11670

M18-39

11670

5K→10K

3.1 - 6.2 mi

Top 76%
×5story building
+79ft-138ft

Overall

20252

Males

12386

M18-39

12386

10K→15K

6.2 - 9.3 mi

Top 69%
×3story building
+67ft-78ft

Overall

18467

Males

11670

M18-39

11670

15K→20K

9.3 - 12.4 mi

Top 66%
×5story building
+106ft-86ft

Overall

17514

Males

11261

M18-39

11261

20K→Half

12.4 - 13.1 mi

Top 70%
×2story building
+19ft-37ft

Overall

18574

Males

11735

M18-39

11735

Half→25K

13.1 - 15.5 mi

Top 74%
×4story building
+66ft-88ft

Overall

19819

Males

12201

M18-39

12201

25K→30K

15.5 - 18.6 mi

Top 66%
×9story building
+181ft-148ft

Overall

17542

Males

11144

M18-39

11144

30K→20M

18.6 - 20.0 mi

Top 62%
×5story building
+64ft-50ft

Overall

16411

Males

10582

M18-39

10582

20M→21M

20.0 - 21.0 mi

Top 68%
×8story building
+106ft-24ft

Overall

18143

Males

11283

M18-39

11283

21M→35K

21.0 - 21.8 mi

Top 62%
×7story building
+17ft-86ft

Overall

16454

Males

10471

M18-39

10471

35K→23M

21.8 - 23.0 mi

Top 71%
×5story building
+23ft-63ft

Overall

18813

Males

11492

M18-39

11492

23M→24M

23.0 - 24.0 mi

Top 68%
×6story building
+12ft-82ft

Overall

18108

Males

11131

M18-39

11131

24M→40K

24.0 - 24.9 mi

Top 65%
×1story
+6ft-20ft

Overall

17415

Males

10764

M18-39

10764

40K→25.2M

24.9 - 25.2 mi

Top 54%
×1story
+13ft-16ft

Overall

14311

Males

9404

M18-39

9404

25.2M→Finish

25.2 - 26.2 mi

Top 61%
×2story building
+22ft-21ft

Overall

16328

Males

10308

M18-39

10308

Passing Analysis

Category:
Athletes Passed
3181
Passed By
664
Net Change
+2517
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21042
5K → 10K525163+362#21042#20680
10K → 15K69713+684#20680#19996
15K → 20K6466+640#19996#19356
20K → Half5210+42#19356#19314
Half → 25K87183-96#19314#19410
25K → 30K36638+328#19410#19082
30K → 20M2139+204#19082#18878
20M → 21M10055+45#18878#18833
21M → 35K10611+95#18833#18738
35K → 23M7685-9#18738#18747
23M → 24M7042+28#18747#18719
24M → 40K6225+37#18719#18682
40K → 25.2M761+75#18682#18607
25.2M → Finish10523+82#18607#18525
TOTALS3181664+2517
📊

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