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BOSTON MARATHON 2023

Karl Smith

Bib: 4798•M

OR

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 13%
Gender (Male)
#0 / 15176
Top 21%
Division (M18-39)
#0 / 5285
Top 44%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:30
Rank: #5709
Start → 5K
21:30 | 6:55/mi
10K· 6.21 mi
41:55
Rank: #4430 (+1279)
5K → 10K
20:25 | 6:34/mi
15K· 9.32 mi
1:02:22
Rank: #3929 (+501)
10K → 15K
20:27 | 6:35/mi
20K· 12.43 mi
1:23:02
Rank: #3698 (+231)
15K → 20K
20:40 | 6:39/mi
Half· 13.11 mi
1:27:34
Rank: #3698
20K → Half
4:32 | 6:39/mi
25K· 15.53 mi
1:44:01
Rank: #3732 (-34)
Half → 25K
16:27 | 6:47/mi
30K· 18.64 mi
2:05:51
Rank: #3862 (-130)
25K → 30K
21:50 | 7:02/mi
20M
2:15:10
Rank: #3759 (+103)
30K → 20M
9:19 | 6:51/mi
21M
2:22:17
Rank: #3661 (+98)
20M → 21M
7:07 | 7:07/mi
35K· 21.75 mi
2:27:10
Rank: #3593 (+68)
21M → 35K
4:53 | 6:32/mi
23M
2:35:44
Rank: #3500 (+93)
35K → 23M
8:34 | 6:51/mi
24M
2:42:15
Rank: #3407 (+93)
23M → 24M
6:31 | 6:31/mi
40K· 24.85 mi
2:48:08
Rank: #3381 (+26)
24M → 40K
5:53 | 6:53/mi
25.2M
2:50:50
Rank: #3423 (-42)
40K → 25.2M
2:42 | 7:50/mi
Finish· 26.22 mi
2:57:44
Rank: #3408 (+15)
25.2M → Finish
6:54 | 6:46/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:34
Pace6:41 /mi
2nd Half
Distance13.11 mi
Time1:30:10
Pace6:53 /mi
📊Positive Split: 3.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:4421:306:5521:30
6:55
-
10K
6.21 mi10:44:0941:556:4520:25
6:34
-0:21
15K
9.32 mi11:04:361:02:226:4120:27
6:35
+0:01
20K
12.43 mi11:25:161:23:026:4120:40
6:39
+0:04
Half
13.11 mi11:29:481:27:346:414:32
6:39
0:00
25K
15.53 mi11:46:151:44:016:4216:27
6:47
+0:08
30K
18.64 mi12:08:052:05:516:4521:50
7:02
+0:15
20M
20.00 mi12:17:242:15:106:459:19
6:51
-0:11
21M
21.00 mi12:24:312:22:176:477:07
7:07
+0:16
35K
21.75 mi12:29:242:27:106:464:53
6:32
-0:35
23M
23.00 mi12:37:582:35:446:468:34
6:51
+0:19
24M
24.00 mi12:44:292:42:156:466:31
6:31
-0:20
40K
24.85 mi12:50:222:48:086:465:53
6:53
+0:22
25.2M
25.20 mi12:53:042:50:506:472:42
7:50
+0:57
Finish
26.22 mi12:59:582:57:446:476:54
6:46
-1:04

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

6:31 /mi

Average Pace

6:47 /mi

Slowest Pace

7:50 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

52:16

29% of race

Time at Steady Pace

1:33:49

53% of race

Time at Slower Pace

31:39

18% of race

Average Pace: 6:47 /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 mi10:23:4421:306:5521:30
6:55
#5709
10K
6.21 mi10:44:0941:556:4520:25
6:34
#4430
15K
9.32 mi11:04:361:02:226:4120:27
6:35
#3929
20K
12.43 mi11:25:161:23:026:4120:40
6:39
#3698
Half
13.11 mi11:29:481:27:346:414:32
6:39
#3698
25K
15.53 mi11:46:151:44:016:4216:27
6:47
#3732
30K
18.64 mi12:08:052:05:516:4521:50
7:02
#3862
20M
20.00 mi12:17:242:15:106:459:19
6:51
#3759
21M
21.00 mi12:24:312:22:176:477:07
7:07
#3661
35K
21.75 mi12:29:242:27:106:464:53
6:32
#3593
23M
23.00 mi12:37:582:35:446:468:34
6:51
#3500
24M
24.00 mi12:44:292:42:156:466:31
6:31
#3407
40K
24.85 mi12:50:222:48:086:465:53
6:53
#3381
25.2M
25.20 mi12:53:042:50:506:472:42
7:50
#3423
Finish
26.22 mi12:59:582:57:446:476:54
6:46
#3408
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi5709524552453158(Top 12%)3007(Top 20%)3007(Top 57%)
10K6.21 mi3.10 mi4430+12794144+11014144+11013288(Top 12%)3130(Top 21%)3130(Top 59%)
15K9.32 mi3.11 mi3929+5013699+4453699+4453158(Top 12%)3007(Top 20%)3007(Top 57%)
20K12.43 mi3.11 mi3698+2313497+2023497+2023199(Top 12%)3040(Top 20%)3040(Top 58%)
Half13.11 mi0.68 mi3698349734973769(Top 14%)3553(Top 23%)3553(Top 67%)
25K15.53 mi2.42 mi3732-343529-323529-323988(Top 15%)3739(Top 25%)3739(Top 71%)
30K18.64 mi3.11 mi3862-1303641-1123641-1124514(Top 17%)4178(Top 28%)4178(Top 79%)
20M20.00 mi1.36 mi3759+1033547+943547+943159(Top 12%)2965(Top 20%)2965(Top 56%)
21M21.00 mi1.00 mi3661+983461+863461+862696(Top 10%)2532(Top 17%)2532(Top 48%)
35K21.75 mi0.75 mi3593+683398+633398+632598(Top 10%)2457(Top 16%)2457(Top 46%)
23M23.00 mi1.25 mi3500+933308+903308+902905(Top 11%)2715(Top 18%)2715(Top 51%)
24M24.00 mi1.00 mi3407+933221+873221+872177(Top 8%)2043(Top 13%)2043(Top 39%)
40K24.85 mi0.85 mi3381+263195+263195+263219(Top 12%)2949(Top 19%)2949(Top 56%)
25.2M25.20 mi0.35 mi3423-423233-383233-385445(Top 20%)4544(Top 30%)4544(Top 86%)
Finish26.22 mi1.02 mi3408+153212+213212+213881(Top 15%)3437(Top 23%)3437(Top 65%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 12%
×21stories
+97ft-345ft

Overall

3158

Males

3007

M18-39

3007

5K→10K

3.1 - 6.2 mi

Top 12%
×5stories
+79ft-138ft

Overall

3288

Males

3130

M18-39

3130

10K→15K

6.2 - 9.3 mi

Top 12%
×3stories
+67ft-78ft

Overall

3158

Males

3007

M18-39

3007

15K→20K

9.3 - 12.4 mi

Top 12%
×5stories
+106ft-86ft

Overall

3199

Males

3040

M18-39

3040

20K→Half

12.4 - 13.1 mi

Top 14%
×2stories
+19ft-37ft

Overall

3769

Males

3553

M18-39

3553

Half→25K

13.1 - 15.5 mi

Top 15%
×4stories
+66ft-88ft

Overall

3988

Males

3739

M18-39

3739

25K→30K

15.5 - 18.6 mi

Top 17%
×9stories
+181ft-148ft

Overall

4514

Males

4178

M18-39

4178

30K→20M

18.6 - 20.0 mi

Top 12%
×5stories
+64ft-50ft

Overall

3159

Males

2965

M18-39

2965

20M→21M

20.0 - 21.0 mi

Top 10%
×8stories
+106ft-24ft

Overall

2696

Males

2532

M18-39

2532

21M→35K

21.0 - 21.8 mi

Top 10%
×7stories
+17ft-86ft

Overall

2598

Males

2457

M18-39

2457

35K→23M

21.8 - 23.0 mi

Top 11%
×5stories
+23ft-63ft

Overall

2905

Males

2715

M18-39

2715

23M→24M

23.0 - 24.0 mi

Top 8%
×6stories
+12ft-82ft

Overall

2177

Males

2043

M18-39

2043

24M→40K

24.0 - 24.9 mi

Top 12%
×1story
+6ft-20ft

Overall

3219

Males

2949

M18-39

2949

40K→25.2M

24.9 - 25.2 mi

Top 20%
×1story
+13ft-16ft

Overall

5445

Males

4544

M18-39

4544

25.2M→Finish

25.2 - 26.2 mi

Top 15%
×2stories
+22ft-21ft

Overall

3881

Males

3437

M18-39

3437

Passing Analysis

Category:
Athletes Passed
2826
Passed By
525
Net Change
+2301
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5709
5K → 10K12845+1279#5709#4430
10K → 15K51110+501#4430#3929
15K → 20K24716+231#3929#3698
20K → Half12120#3698#3698
Half → 25K72106-34#3698#3732
25K → 30K68198-130#3732#3862
30K → 20M11310+103#3862#3759
20M → 21M11719+98#3759#3661
21M → 35K746+68#3661#3593
35K → 23M11219+93#3593#3500
23M → 24M1007+93#3500#3407
24M → 40K4923+26#3407#3381
40K → 25.2M1052-42#3381#3423
25.2M → Finish5742+15#3423#3408
TOTALS2826525+2301
📊

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