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BOSTON MARATHON 2023

Alston Mccaslin

Bib: 5993•M

MD

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 33%
Gender (Male)
#0 / 15176
Top 48%
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
21:53
Rank: #6518
Start → 5K
21:53 | 7:03/mi
10K· 6.21 mi
43:46
Rank: #6756 (-238)
5K → 10K
21:53 | 7:03/mi
15K· 9.32 mi
1:05:33
Rank: #6697 (+59)
10K → 15K
21:47 | 7:01/mi
20K· 12.43 mi
1:27:38
Rank: #6648 (+49)
15K → 20K
22:05 | 7:06/mi
Half· 13.11 mi
1:32:31
Rank: #6689 (-41)
20K → Half
4:53 | 7:09/mi
25K· 15.53 mi
1:50:15
Rank: #6752 (-63)
Half → 25K
17:44 | 7:19/mi
30K· 18.64 mi
2:14:03
Rank: #6943 (-191)
25K → 30K
23:48 | 7:40/mi
20M
2:24:37
Rank: #7008 (-65)
30K → 20M
10:34 | 7:47/mi
21M
2:33:44
Rank: #7330 (-322)
20M → 21M
9:07 | 9:07/mi
35K· 21.75 mi
2:39:33
Rank: #7420 (-90)
21M → 35K
5:49 | 7:46/mi
23M
2:51:09
Rank: #8009 (-589)
35K → 23M
11:36 | 9:16/mi
24M
2:59:06
Rank: #8105 (-96)
23M → 24M
7:57 | 7:57/mi
40K· 24.85 mi
3:07:47
Rank: #8734 (-629)
24M → 40K
8:41 | 10:09/mi
25.2M
3:10:40
Rank: #8715 (+19)
40K → 25.2M
2:53 | 8:22/mi
Finish· 26.22 mi
3:18:45
Rank: #8815 (-100)
25.2M → Finish
8:05 | 7:56/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:32:31
Pace7:03 /mi
2nd Half
Distance13.11 mi
Time1:46:14
Pace8:06 /mi
📊Positive Split: 14.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:5021:537:0321:53
7:03
-
10K
6.21 mi10:46:4343:467:0321:53
7:03
0:00
15K
9.32 mi11:08:301:05:337:0221:47
7:01
-0:02
20K
12.43 mi11:30:351:27:387:0322:05
7:06
+0:05
Half
13.11 mi11:35:281:32:317:034:53
7:09
+0:03
25K
15.53 mi11:53:121:50:157:0617:44
7:19
+0:10
30K
18.64 mi12:17:002:14:037:1123:48
7:40
+0:21
20M
20.00 mi12:27:342:24:377:1410:34
7:47
+0:07
21M
21.00 mi12:36:412:33:447:199:07
9:07
+1:20
35K
21.75 mi12:42:302:39:337:205:49
7:46
-1:21
23M
23.00 mi12:54:062:51:097:2611:36
9:16
+1:30
24M
24.00 mi13:02:032:59:067:287:57
7:57
-1:19
40K
24.85 mi13:10:443:07:477:338:41
10:09
+2:12
25.2M
25.20 mi13:13:373:10:407:342:53
8:22
-1:47
Finish
26.22 mi13:21:423:18:457:358:05
7:56
-0:26

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

7:01 /mi

Average Pace

7:35 /mi

Slowest Pace

10:09 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:32:31

47% of race

Time at Steady Pace

1:13:57

37% of race

Time at Slower Pace

32:17

16% of race

Average Pace: 7:35 /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 mi10:24:5021:537:0321:53
7:03
#6518
10K
6.21 mi10:46:4343:467:0321:53
7:03
#6756
15K
9.32 mi11:08:301:05:337:0221:47
7:01
#6697
20K
12.43 mi11:30:351:27:387:0322:05
7:06
#6648
Half
13.11 mi11:35:281:32:317:034:53
7:09
#6689
25K
15.53 mi11:53:121:50:157:0617:44
7:19
#6752
30K
18.64 mi12:17:002:14:037:1123:48
7:40
#6943
20M
20.00 mi12:27:342:24:377:1410:34
7:47
#7008
21M
21.00 mi12:36:412:33:447:199:07
9:07
#7330
35K
21.75 mi12:42:302:39:337:205:49
7:46
#7420
23M
23.00 mi12:54:062:51:097:2611:36
9:16
#8009
24M
24.00 mi13:02:032:59:067:287:57
7:57
#8105
40K
24.85 mi13:10:443:07:477:338:41
10:09
#8734
25.2M
25.20 mi13:13:373:10:407:342:53
8:22
#8715
Finish
26.22 mi13:21:423:18:457:358:05
7:56
#8815
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi6518590259026630(Top 25%)5960(Top 39%)5960(Top 113%)
10K6.21 mi3.10 mi6756-2386080-1786080-1787095(Top 27%)6309(Top 42%)6309(Top 119%)
15K9.32 mi3.11 mi6697+596028+526028+526630(Top 25%)5960(Top 39%)5960(Top 113%)
20K12.43 mi3.11 mi6648+495974+545974+546602(Top 25%)5916(Top 39%)5916(Top 112%)
Half13.11 mi0.68 mi6689-416009-356009-357576(Top 28%)6635(Top 44%)6635(Top 126%)
25K15.53 mi2.42 mi6752-636048-396048-397376(Top 28%)6404(Top 42%)6404(Top 121%)
30K18.64 mi3.11 mi6943-1916168-1206168-1208364(Top 31%)6905(Top 45%)6905(Top 131%)
20M20.00 mi1.36 mi7008-656214-466214-468666(Top 33%)6999(Top 46%)6999(Top 132%)
21M21.00 mi1.00 mi7330-3226410-1966410-19614032(Top 53%)9504(Top 63%)9504(Top 180%)
35K21.75 mi0.75 mi7420-906456-466456-4610416(Top 39%)7821(Top 52%)7821(Top 148%)
23M23.00 mi1.25 mi8009-5896808-3526808-35217332(Top 65%)10837(Top 71%)10837(Top 205%)
24M24.00 mi1.00 mi8105-966855-476855-4710848(Top 41%)7821(Top 52%)7821(Top 148%)
40K24.85 mi0.85 mi8734-6297213-3587213-35820361(Top 76%)12074(Top 80%)12074(Top 228%)
25.2M25.20 mi0.35 mi8715+197196+177196+178625(Top 32%)6526(Top 43%)6526(Top 123%)
Finish26.22 mi1.02 mi8815-1007236-407236-4011581(Top 44%)8074(Top 53%)8074(Top 153%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 25%
×21stories
+97ft-345ft

Overall

6630

Males

5960

M18-39

5960

5K→10K

3.1 - 6.2 mi

Top 27%
×5stories
+79ft-138ft

Overall

7095

Males

6309

M18-39

6309

10K→15K

6.2 - 9.3 mi

Top 25%
×3stories
+67ft-78ft

Overall

6630

Males

5960

M18-39

5960

15K→20K

9.3 - 12.4 mi

Top 25%
×5stories
+106ft-86ft

Overall

6602

Males

5916

M18-39

5916

20K→Half

12.4 - 13.1 mi

Top 28%
×2stories
+19ft-37ft

Overall

7576

Males

6635

M18-39

6635

Half→25K

13.1 - 15.5 mi

Top 28%
×4stories
+66ft-88ft

Overall

7376

Males

6404

M18-39

6404

25K→30K

15.5 - 18.6 mi

Top 31%
×9stories
+181ft-148ft

Overall

8364

Males

6905

M18-39

6905

30K→20M

18.6 - 20.0 mi

Top 33%
×5stories
+64ft-50ft

Overall

8666

Males

6999

M18-39

6999

20M→21M

20.0 - 21.0 mi

Top 53%
×8stories
+106ft-24ft

Overall

14032

Males

9504

M18-39

9504

21M→35K

21.0 - 21.8 mi

Top 39%
×7stories
+17ft-86ft

Overall

10416

Males

7821

M18-39

7821

35K→23M

21.8 - 23.0 mi

Top 65%
×5stories
+23ft-63ft

Overall

17332

Males

10837

M18-39

10837

23M→24M

23.0 - 24.0 mi

Top 41%
×6stories
+12ft-82ft

Overall

10848

Males

7821

M18-39

7821

24M→40K

24.0 - 24.9 mi

Top 76%
×1story
+6ft-20ft

Overall

20361

Males

12074

M18-39

12074

40K→25.2M

24.9 - 25.2 mi

Top 32%
×1story
+13ft-16ft

Overall

8625

Males

6526

M18-39

6526

25.2M→Finish

25.2 - 26.2 mi

Top 44%
×2stories
+22ft-21ft

Overall

11581

Males

8074

M18-39

8074

Passing Analysis

Category:
Athletes Passed
692
Passed By
2989
Net Change
-2297
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6518
5K → 10K104342-238#6518#6756
10K → 15K14384+59#6756#6697
15K → 20K13485+49#6697#6648
20K → Half849-41#6648#6689
Half → 25K61124-63#6689#6752
25K → 30K65256-191#6752#6943
30K → 20M3297-65#6943#7008
20M → 21M8330-322#7008#7330
21M → 35K24114-90#7330#7420
35K → 23M12601-589#7420#8009
23M → 24M34130-96#8009#8105
24M → 40K4633-629#8105#8734
40K → 25.2M3617+19#8734#8715
25.2M → Finish27127-100#8715#8815
TOTALS6922989-2297
📊

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