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BOSTON MARATHON 2023

Peter Kostelnick

Bib: 627•M

AZ

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 6%
Gender (Male)
#0 / 15176
Top 11%
Division (M18-39)
#0 / 5285
Top 25%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:45
Rank: #757
Start → 5K
18:45 | 6:02/mi
10K· 6.21 mi
37:26
Rank: #791 (-34)
5K → 10K
18:41 | 6:01/mi
15K· 9.32 mi
56:16
Rank: #798 (-7)
10K → 15K
18:50 | 6:04/mi
20K· 12.43 mi
1:15:25
Rank: #820 (-22)
15K → 20K
19:09 | 6:10/mi
Half· 13.11 mi
1:19:32
Rank: #821 (-1)
20K → Half
4:07 | 6:02/mi
25K· 15.53 mi
1:36:01
Rank: #1075 (-254)
Half → 25K
16:29 | 6:48/mi
30K· 18.64 mi
1:56:49
Rank: #1227 (-152)
25K → 30K
20:48 | 6:42/mi
20M
2:06:20
Rank: #1355 (-128)
30K → 20M
9:31 | 7:00/mi
21M
2:13:59
Rank: #1493 (-138)
20M → 21M
7:39 | 7:39/mi
35K· 21.75 mi
2:19:04
Rank: #1555 (-62)
21M → 35K
5:05 | 6:48/mi
23M
2:27:49
Rank: #1626 (-71)
35K → 23M
8:45 | 6:59/mi
24M
2:34:37
Rank: #1679 (-53)
23M → 24M
6:48 | 6:48/mi
40K· 24.85 mi
2:40:18
Rank: #1660 (+19)
24M → 40K
5:41 | 6:39/mi
25.2M
2:42:45
Rank: #1664 (-4)
40K → 25.2M
2:27 | 7:06/mi
Finish· 26.22 mi
2:49:42
Rank: #1725 (-61)
25.2M → Finish
6:57 | 6:49/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:19:32
Pace6:04 /mi
2nd Half
Distance13.11 mi
Time1:30:10
Pace6:53 /mi
📊Positive Split: 13.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:18:5918:456:0218:45
6:02
-
10K
6.21 mi10:37:4037:266:0118:41
6:01
-0:01
15K
9.32 mi10:56:3056:166:0218:50
6:04
+0:03
20K
12.43 mi11:15:391:15:256:0419:09
6:10
+0:06
Half
13.11 mi11:19:461:19:326:044:07
6:02
-0:08
25K
15.53 mi11:36:151:36:016:1116:29
6:48
+0:46
30K
18.64 mi11:57:031:56:496:1620:48
6:42
-0:06
20M
20.00 mi12:06:342:06:206:199:31
7:00
+0:18
21M
21.00 mi12:14:132:13:596:237:39
7:39
+0:39
35K
21.75 mi12:19:182:19:046:245:05
6:48
-0:51
23M
23.00 mi12:28:032:27:496:268:45
6:59
+0:11
24M
24.00 mi12:34:512:34:376:276:48
6:48
-0:11
40K
24.85 mi12:40:322:40:186:275:41
6:39
-0:09
25.2M
25.20 mi12:42:592:42:456:282:27
7:06
+0:27
Finish
26.22 mi12:49:562:49:426:296:57
6:49
-0:17

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

6:01 /mi

Average Pace

6:29 /mi

Slowest Pace

7:39 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:19:32

47% of race

Time at Steady Pace

1:20:04

47% of race

Time at Slower Pace

10:06

6% of race

Average Pace: 6:28 /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 mi10:18:5918:456:0218:45
6:02
#757
10K
6.21 mi10:37:4037:266:0118:41
6:01
#791
15K
9.32 mi10:56:3056:166:0218:50
6:04
#798
20K
12.43 mi11:15:391:15:256:0419:09
6:10
#820
Half
13.11 mi11:19:461:19:326:044:07
6:02
#821
25K
15.53 mi11:36:151:36:016:1116:29
6:48
#1075
30K
18.64 mi11:57:031:56:496:1620:48
6:42
#1227
20M
20.00 mi12:06:342:06:206:199:31
7:00
#1355
21M
21.00 mi12:14:132:13:596:237:39
7:39
#1493
35K
21.75 mi12:19:182:19:046:245:05
6:48
#1555
23M
23.00 mi12:28:032:27:496:268:45
6:59
#1626
24M
24.00 mi12:34:512:34:376:276:48
6:48
#1679
40K
24.85 mi12:40:322:40:186:275:41
6:39
#1660
25.2M
25.20 mi12:42:592:42:456:282:27
7:06
#1664
Finish
26.22 mi12:49:562:49:426:296:57
6:49
#1725
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi757709709860(Top 3%)813(Top 5%)813(Top 15%)
10K6.21 mi3.10 mi791-34746-37746-37835(Top 3%)789(Top 5%)789(Top 15%)
15K9.32 mi3.11 mi798-7753-7753-7860(Top 3%)813(Top 5%)813(Top 15%)
20K12.43 mi3.11 mi820-22775-22775-22955(Top 4%)907(Top 6%)907(Top 17%)
Half13.11 mi0.68 mi821-1776-1776-1876(Top 3%)834(Top 5%)834(Top 16%)
25K15.53 mi2.42 mi1075-2541020-2441020-2444102(Top 15%)3842(Top 25%)3842(Top 73%)
30K18.64 mi3.11 mi1227-1521172-1521172-1522363(Top 9%)2249(Top 15%)2249(Top 43%)
20M20.00 mi1.36 mi1355-1281295-1231295-1234015(Top 15%)3715(Top 24%)3715(Top 70%)
21M21.00 mi1.00 mi1493-1381426-1311426-1315319(Top 20%)4691(Top 31%)4691(Top 89%)
35K21.75 mi0.75 mi1555-621486-601486-604086(Top 15%)3736(Top 25%)3736(Top 71%)
23M23.00 mi1.25 mi1626-711556-701556-703693(Top 14%)3407(Top 22%)3407(Top 64%)
24M24.00 mi1.00 mi1679-531606-501606-503607(Top 14%)3306(Top 22%)3306(Top 63%)
40K24.85 mi0.85 mi1660+191586+201586+202085(Top 8%)1949(Top 13%)1949(Top 37%)
25.2M25.20 mi0.35 mi1664-41589-31589-32086(Top 8%)1942(Top 13%)1942(Top 37%)
Finish26.22 mi1.02 mi1725-611649-601649-604146(Top 16%)3650(Top 24%)3650(Top 69%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 3%
×21stories
+97ft-345ft

Overall

860

Males

813

M18-39

813

5K→10K

3.1 - 6.2 mi

Top 3%
×5stories
+79ft-138ft

Overall

835

Males

789

M18-39

789

10K→15K

6.2 - 9.3 mi

Top 3%
×3stories
+67ft-78ft

Overall

860

Males

813

M18-39

813

15K→20K

9.3 - 12.4 mi

Top 4%
×5stories
+106ft-86ft

Overall

955

Males

907

M18-39

907

20K→Half

12.4 - 13.1 mi

Top 3%
×2stories
+19ft-37ft

Overall

876

Males

834

M18-39

834

Half→25K

13.1 - 15.5 mi

Top 15%
×4stories
+66ft-88ft

Overall

4102

Males

3842

M18-39

3842

25K→30K

15.5 - 18.6 mi

Top 9%
×9stories
+181ft-148ft

Overall

2363

Males

2249

M18-39

2249

30K→20M

18.6 - 20.0 mi

Top 15%
×5stories
+64ft-50ft

Overall

4015

Males

3715

M18-39

3715

20M→21M

20.0 - 21.0 mi

Top 20%
×8stories
+106ft-24ft

Overall

5319

Males

4691

M18-39

4691

21M→35K

21.0 - 21.8 mi

Top 15%
×7stories
+17ft-86ft

Overall

4086

Males

3736

M18-39

3736

35K→23M

21.8 - 23.0 mi

Top 14%
×5stories
+23ft-63ft

Overall

3693

Males

3407

M18-39

3407

23M→24M

23.0 - 24.0 mi

Top 14%
×6stories
+12ft-82ft

Overall

3607

Males

3306

M18-39

3306

24M→40K

24.0 - 24.9 mi

Top 8%
×1story
+6ft-20ft

Overall

2085

Males

1949

M18-39

1949

40K→25.2M

24.9 - 25.2 mi

Top 8%
×1story
+13ft-16ft

Overall

2086

Males

1942

M18-39

1942

25.2M→Finish

25.2 - 26.2 mi

Top 16%
×2stories
+22ft-21ft

Overall

4146

Males

3650

M18-39

3650

Passing Analysis

Category:
Athletes Passed
159
Passed By
1127
Net Change
-968
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#757
5K → 10K2559-34#757#791
10K → 15K1522-7#791#798
15K → 20K1941-22#798#820
20K → Half34-1#820#821
Half → 25K2256-254#821#1075
25K → 30K10162-152#1075#1227
30K → 20M4132-128#1227#1355
20M → 21M5143-138#1355#1493
21M → 35K163-62#1493#1555
35K → 23M980-71#1555#1626
23M → 24M1164-53#1626#1679
24M → 40K3617+19#1679#1660
40K → 25.2M812-4#1660#1664
25.2M → Finish1172-61#1664#1725
TOTALS1591127-968
📊

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