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BOSTON MARATHON 2023

Zachary Alfaro

Bib: 30531•M

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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

Start
0:00:00
Race begins
5K· 3.11 mi
30:09
Rank: #22670
Start → 5K
9:42/mi
30:09 split
10K· 6.21 mi
1:00:26
Rank: #22975 (-305)
5K → 10K
9:45/mi
30:17 split
15K· 9.32 mi
1:30:55
Rank: #23023 (-48)
10K → 15K
9:49/mi
30:29 split
20K· 12.43 mi
2:01:32
Rank: #22874 (+149)
15K → 20K
9:51/mi
30:37 split
Half· 13.11 mi
2:08:13
Rank: #22872 (+2)
20K → Half
9:48/mi
6:41 split
25K· 15.53 mi
2:32:49
Rank: #22808 (+64)
Half → 25K
10:09/mi
24:36 split
30K· 18.64 mi
3:25:21
Rank: #24702 (-1894)
25K → 30K
16:55/mi
52:32 split
20M
3:47:55
Rank: #25100 (-398)
30K → 20M
16:36/mi
22:34 split
21M
4:00:00
Rank: #25014 (+86)
20M → 21M
12:05/mi
12:05 split
35K· 21.75 mi
4:10:29
Rank: #25085 (-71)
21M → 35K
14:01/mi
10:29 split
23M
4:27:06
Rank: #25117 (-32)
35K → 23M
13:16/mi
16:37 split
24M
4:41:36
Rank: #25214 (-97)
23M → 24M
14:30/mi
14:30 split
40K· 24.85 mi
4:51:06
Rank: #25152 (+62)
24M → 40K
11:07/mi
9:30 split
25.2M
4:54:57
Rank: #25110 (+42)
40K → 25.2M
11:10/mi
3:51 split
Finish· 26.22 mi
5:05:11
Rank: #25049 (+61)
25.2M → Finish
10:03/mi
10:14 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:08:13
Pace9:47 /mi
2nd Half
Distance13.11 mi
Time2:56:58
Pace13:30 /mi
📊Positive Split: 38.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:3530:099:4230:09
9:42
-
10K
6.21 mi12:19:521:00:269:4430:17
9:45
+0:03
15K
9.32 mi12:50:211:30:559:4530:29
9:49
+0:04
20K
12.43 mi13:20:582:01:329:4730:37
9:51
+0:02
Half
13.11 mi13:27:392:08:139:476:41
9:48
-0:03
25K
15.53 mi13:52:152:32:499:5024:36
10:09
+0:21
30K
18.64 mi14:44:473:25:2111:0152:32
16:55
+6:46
20M
20.00 mi15:07:213:47:5511:2422:34
16:36
-0:19
21M
21.00 mi15:19:264:00:0011:2612:05
12:05
-4:31
35K
21.75 mi15:29:554:10:2911:3110:29
14:01
+1:56
23M
23.00 mi15:46:324:27:0611:3716:37
13:16
-0:45
24M
24.00 mi16:01:024:41:3611:4414:30
14:30
+1:14
40K
24.85 mi16:10:324:51:0611:439:30
11:07
-3:23
25.2M
25.20 mi16:14:234:54:5711:423:51
11:10
+0:03
Finish
26.22 mi16:24:375:05:1111:3910:14
10:03
-1:07

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

9:42 /mi

Average Pace

11:39 /mi

Slowest Pace

16:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:08:13

42% of race

Time at Steady Pace

1:00:16

20% of race

Time at Slower Pace

1:56:42

38% of race

Average Pace: 11:38 /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 mi11:49:3530:099:4230:09
9:42
#22670
10K
6.21 mi12:19:521:00:269:4430:17
9:45
#22975
15K
9.32 mi12:50:211:30:559:4530:29
9:49
#23023
20K
12.43 mi13:20:582:01:329:4730:37
9:51
#22874
Half
13.11 mi13:27:392:08:139:476:41
9:48
#22872
25K
15.53 mi13:52:152:32:499:5024:36
10:09
#22808
30K
18.64 mi14:44:473:25:2111:0152:32
16:55
#24702
20M
20.00 mi15:07:213:47:5511:2422:34
16:36
#25100
21M
21.00 mi15:19:264:00:0011:2612:05
12:05
#25014
35K
21.75 mi15:29:554:10:2911:3110:29
14:01
#25085
23M
23.00 mi15:46:324:27:0611:3716:37
13:16
#25117
24M
24.00 mi16:01:024:41:3611:4414:30
14:30
#25214
40K
24.85 mi16:10:324:51:0611:439:30
11:07
#25152
25.2M
25.20 mi16:14:234:54:5711:423:51
11:10
#25110
Finish
26.22 mi16:24:375:05:1111:3910:14
10:03
#25049
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi22670134301343023075(Top 87%)13670(Top 90%)13670(Top 259%)
10K6.21 mi3.10 mi22975-30513602-17213602-17223153(Top 87%)13717(Top 90%)13717(Top 260%)
15K9.32 mi3.11 mi23023-4813633-3113633-3123075(Top 87%)13670(Top 90%)13670(Top 259%)
20K12.43 mi3.11 mi22874+14913570+6313570+6322536(Top 85%)13414(Top 88%)13414(Top 254%)
Half13.11 mi0.68 mi22872+213573-313573-322855(Top 86%)13568(Top 89%)13568(Top 257%)
25K15.53 mi2.42 mi22808+6413530+4313530+4322511(Top 85%)13370(Top 88%)13370(Top 253%)
30K18.64 mi3.11 mi24702-189414367-83714367-83726597(Top 100%)15161(Top 100%)15161(Top 287%)
20M20.00 mi1.36 mi25100-39814526-15914526-15926528(Top 100%)15125(Top 100%)15125(Top 286%)
21M21.00 mi1.00 mi25014+8614478+4814478+4822887(Top 86%)13376(Top 88%)13376(Top 253%)
35K21.75 mi0.75 mi25085-7114503-2514503-2526127(Top 98%)14911(Top 98%)14911(Top 282%)
23M23.00 mi1.25 mi25117-3214507-414507-425334(Top 95%)14502(Top 96%)14502(Top 274%)
24M24.00 mi1.00 mi25214-9714547-4014547-4026259(Top 99%)14956(Top 99%)14956(Top 283%)
40K24.85 mi0.85 mi25152+6214516+3114516+3122577(Top 85%)13123(Top 86%)13123(Top 248%)
25.2M25.20 mi0.35 mi25110+4214492+2414492+2420826(Top 78%)12326(Top 81%)12326(Top 233%)
Finish26.22 mi1.02 mi25049+6114463+2914463+2921880(Top 82%)12808(Top 84%)12808(Top 242%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 87%
×21stories
+97ft-345ft

Overall

23075

Males

13670

M18-39

13670

5K→10K

3.1 - 6.2 mi

Top 87%
×5stories
+79ft-138ft

Overall

23153

Males

13717

M18-39

13717

10K→15K

6.2 - 9.3 mi

Top 87%
×3stories
+67ft-78ft

Overall

23075

Males

13670

M18-39

13670

15K→20K

9.3 - 12.4 mi

Top 85%
×5stories
+106ft-86ft

Overall

22536

Males

13414

M18-39

13414

20K→Half

12.4 - 13.1 mi

Top 86%
×2stories
+19ft-37ft

Overall

22855

Males

13568

M18-39

13568

Half→25K

13.1 - 15.5 mi

Top 85%
×4stories
+66ft-88ft

Overall

22511

Males

13370

M18-39

13370

25K→30K

15.5 - 18.6 mi

Top 100%
×9stories
+181ft-148ft

Overall

26597

Males

15161

M18-39

15161

30K→20M

18.6 - 20.0 mi

Top 100%
×5stories
+64ft-50ft

Overall

26528

Males

15125

M18-39

15125

20M→21M

20.0 - 21.0 mi

Top 86%
×8stories
+106ft-24ft

Overall

22887

Males

13376

M18-39

13376

21M→35K

21.0 - 21.8 mi

Top 98%
×7stories
+17ft-86ft

Overall

26127

Males

14911

M18-39

14911

35K→23M

21.8 - 23.0 mi

Top 95%
×5stories
+23ft-63ft

Overall

25334

Males

14502

M18-39

14502

23M→24M

23.0 - 24.0 mi

Top 99%
×6stories
+12ft-82ft

Overall

26259

Males

14956

M18-39

14956

24M→40K

24.0 - 24.9 mi

Top 85%
×1story
+6ft-20ft

Overall

22577

Males

13123

M18-39

13123

40K→25.2M

24.9 - 25.2 mi

Top 78%
×1story
+13ft-16ft

Overall

20826

Males

12326

M18-39

12326

25.2M→Finish

25.2 - 26.2 mi

Top 82%
×2stories
+22ft-21ft

Overall

21880

Males

12808

M18-39

12808

Passing Analysis

Category:
Athletes Passed
887
Passed By
3266
Net Change
-2379
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22670
5K → 10K122427-305#22670#22975
10K → 15K112160-48#22975#23023
15K → 20K20859+149#23023#22874
20K → Half2725+2#22874#22872
Half → 25K12359+64#22872#22808
25K → 30K01894-1894#22808#24702
30K → 20M3401-398#24702#25100
20M → 21M915+86#25100#25014
21M → 35K778-71#25014#25085
35K → 23M2355-32#25085#25117
23M → 24M3100-97#25117#25214
24M → 40K631+62#25214#25152
40K → 25.2M420+42#25152#25110
25.2M → Finish632+61#25110#25049
TOTALS8873266-2379
📊

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