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BOSTON MARATHON 2023

John Karas

Bib: 14319•M

WI

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 33%
Gender (Male)
#0 / 15176
Top 48%
Masters (Masters Men)
#0 / 9891
Top 36%
Division (M50-54)
#0 / 2052
Top 33%
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
7:25/mi
23:04
↑ 97↓ 3451.5%
10K· 6.21 mi
7:31/mi
46:26
↑ 79↓ 1380.4%
15K· 9.32 mi
7:28/mi
1:09:39
↑ 67↓ 78
20K· 12.43 mi
7:35/mi
1:33:14
↑ 106↓ 860.1%
Half· 13.11 mi
7:27/mi
1:38:19
↑ 19↓ 370.5%
25K· 15.53 mi
7:38/mi
1:56:49
↑ 66↓ 880.2%
30K· 18.64 mi
7:40/mi
2:20:37
↑ 181↓ 1480.2%
20M
7:44/mi
2:31:07
↑ 64↓ 500.2%
21M
8:10/mi
2:39:17
↑ 106↓ 241.6%
35K· 21.75 mi
7:29/mi
2:44:53
↑ 17↓ 861.7%
23M
7:39/mi
2:54:28
↑ 23↓ 630.6%
24M
7:30/mi
3:01:58
↓ 821.3%
40K· 24.85 mi
7:51/mi
3:08:41
↓ 200.3%
25.2M
8:04/mi
3:11:28
↑ 13↓ 160.2%
Finish· 26.22 mi
7:22/mi
3:18:58
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:19
Pace7:30 /mi
2nd Half
Distance13.11 mi
Time1:40:39
Pace7:41 /mi
📊Positive Split: 2.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:0823:047:2523:04
7:25
-
10K
6.21 mi11:17:3046:267:2823:22
7:31
+0:06
15K
9.32 mi11:40:431:09:397:2823:13
7:28
-0:03
20K
12.43 mi12:04:181:33:147:3023:35
7:35
+0:07
Half
13.11 mi12:09:231:38:197:305:05
7:27
-0:08
25K
15.53 mi12:27:531:56:497:3118:30
7:38
+0:11
30K
18.64 mi12:51:412:20:377:3323:48
7:40
+0:02
20M
20.00 mi13:02:112:31:077:3310:30
7:44
+0:04
21M
21.00 mi13:10:212:39:177:358:10
8:10
+0:26
35K
21.75 mi13:15:572:44:537:355:36
7:29
-0:41
23M
23.00 mi13:25:322:54:287:359:35
7:39
+0:10
24M
24.00 mi13:33:023:01:587:357:30
7:30
-0:09
40K
24.85 mi13:39:453:08:417:356:43
7:51
+0:21
25.2M
25.20 mi13:42:323:11:287:362:47
8:04
+0:13
Finish
26.22 mi13:50:023:18:587:367:30
7:22
-0:42

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

7:22 /mi

Average Pace

7:36 /mi

Slowest Pace

8:10 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:10:48

96% of race

Time at Steady Pace

8:10

4% of race

Time at Slower Pace

0:00

0% 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 mi10:54:0823:047:2523:04
7:25
#9016
10K
6.21 mi11:17:3046:267:2823:22
7:31
#9760
15K
9.32 mi11:40:431:09:397:2823:13
7:28
#9796
20K
12.43 mi12:04:181:33:147:3023:35
7:35
#9846
Half
13.11 mi12:09:231:38:197:305:05
7:27
#9833
25K
15.53 mi12:27:531:56:497:3118:30
7:38
#9811
30K
18.64 mi12:51:412:20:377:3323:48
7:40
#9522
20M
20.00 mi13:02:112:31:077:3310:30
7:44
#9409
21M
21.00 mi13:10:212:39:177:358:10
8:10
#9304
35K
21.75 mi13:15:572:44:537:355:36
7:29
#9253
23M
23.00 mi13:25:322:54:287:359:35
7:39
#9120
24M
24.00 mi13:33:023:01:587:357:30
7:30
#9036
40K
24.85 mi13:39:453:08:417:356:43
7:51
#9013
25.2M
25.20 mi13:42:323:11:287:362:47
8:04
#8959
Finish
26.22 mi13:50:023:18:587:367:30
7:22
#8869
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi9016760376039938(Top 37%)8110(Top 53%)8110(Top 395%)
10K6.21 mi3.10 mi9760-7448019-4168019-41610601(Top 40%)8480(Top 56%)8480(Top 413%)
15K9.32 mi3.11 mi9796-368036-178036-179938(Top 37%)8110(Top 53%)8110(Top 395%)
20K12.43 mi3.11 mi9846-508060-248060-2410001(Top 38%)8069(Top 53%)8069(Top 393%)
Half13.11 mi0.68 mi9833+138058+28058+29754(Top 37%)7947(Top 52%)7947(Top 387%)
25K15.53 mi2.42 mi9811+228029+298029+299764(Top 37%)7851(Top 52%)7851(Top 383%)
30K18.64 mi3.11 mi9522+2897817+2127817+2128365(Top 31%)6906(Top 46%)6906(Top 337%)
20M20.00 mi1.36 mi9409+1137724+937724+938362(Top 31%)6815(Top 45%)6815(Top 332%)
21M21.00 mi1.00 mi9304+1057637+877637+878410(Top 32%)6716(Top 44%)6716(Top 327%)
35K21.75 mi0.75 mi9253+517590+477590+478432(Top 32%)6763(Top 45%)6763(Top 330%)
23M23.00 mi1.25 mi9120+1337483+1077483+1077452(Top 28%)6093(Top 40%)6093(Top 297%)
24M24.00 mi1.00 mi9036+847413+707413+707695(Top 29%)6133(Top 40%)6133(Top 299%)
40K24.85 mi0.85 mi9013+237385+287385+289004(Top 34%)6814(Top 45%)6814(Top 332%)
25.2M25.20 mi0.35 mi8959+547344+417344+416898(Top 26%)5530(Top 36%)5530(Top 269%)
Finish26.22 mi1.02 mi8869+907272+727272+727505(Top 28%)5872(Top 39%)5872(Top 286%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 37%
×21story building
+97ft-345ft

Overall

9938

Males

8110

M50-54

8110

5K→10K

3.1 - 6.2 mi

Top 40%
×5story building
+79ft-138ft

Overall

10601

Males

8480

M50-54

8480

10K→15K

6.2 - 9.3 mi

Top 37%
×3story building
+67ft-78ft

Overall

9938

Males

8110

M50-54

8110

15K→20K

9.3 - 12.4 mi

Top 38%
×5story building
+106ft-86ft

Overall

10001

Males

8069

M50-54

8069

20K→Half

12.4 - 13.1 mi

Top 37%
×2story building
+19ft-37ft

Overall

9754

Males

7947

M50-54

7947

Half→25K

13.1 - 15.5 mi

Top 37%
×4story building
+66ft-88ft

Overall

9764

Males

7851

M50-54

7851

25K→30K

15.5 - 18.6 mi

Top 31%
×9story building
+181ft-148ft

Overall

8365

Males

6906

M50-54

6906

30K→20M

18.6 - 20.0 mi

Top 31%
×5story building
+64ft-50ft

Overall

8362

Males

6815

M50-54

6815

20M→21M

20.0 - 21.0 mi

Top 32%
×8story building
+106ft-24ft

Overall

8410

Males

6716

M50-54

6716

21M→35K

21.0 - 21.8 mi

Top 32%
×7story building
+17ft-86ft

Overall

8432

Males

6763

M50-54

6763

35K→23M

21.8 - 23.0 mi

Top 28%
×5story building
+23ft-63ft

Overall

7452

Males

6093

M50-54

6093

23M→24M

23.0 - 24.0 mi

Top 29%
×6story building
+12ft-82ft

Overall

7695

Males

6133

M50-54

6133

24M→40K

24.0 - 24.9 mi

Top 34%
×1story
+6ft-20ft

Overall

9004

Males

6814

M50-54

6814

40K→25.2M

24.9 - 25.2 mi

Top 26%
×1story
+13ft-16ft

Overall

6898

Males

5530

M50-54

5530

25.2M→Finish

25.2 - 26.2 mi

Top 28%
×2story building
+22ft-21ft

Overall

7505

Males

5872

M50-54

5872

Passing Analysis

Category:
Athletes Passed
1714*
Passed By
1567
Net Change
+147
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9016
5K → 10K85829-744#9016#9760
10K → 15K156192-36#9760#9796
15K → 20K142*192-50#9796#9846
20K → Half3017+13#9846#9833
Half → 25K126104+22#9833#9811
25K → 30K335*46+289#9811#9522
30K → 20M14128+113#9522#9409
20M → 21M13732+105#9409#9304
21M → 35K7019+51#9304#9253
35K → 23M15926+133#9253#9120
23M → 24M10319+84#9120#9036
24M → 40K6239+23#9036#9013
40K → 25.2M595+54#9013#8959
25.2M → Finish10919+90#8959#8869
TOTALS1714*1567+147

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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