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BOSTON MARATHON 2023

Nicholas Katsefaras

Bib: 673•M

MI

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 2%
Gender (Male)
#0 / 15176
Top 3%
Division (M18-39)
#0 / 5285
Top 7%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:25
Rank: #579
Start → 5K
18:25 | 5:56/mi
10K· 6.21 mi
36:31
Rank: #515 (+64)
5K → 10K
18:06 | 5:50/mi
15K· 9.32 mi
54:45
Rank: #495 (+20)
10K → 15K
18:14 | 5:52/mi
20K· 12.43 mi
1:13:15
Rank: #488 (+7)
15K → 20K
18:30 | 5:57/mi
Half· 13.11 mi
1:17:15
Rank: #485 (+3)
20K → Half
4:00 | 5:52/mi
25K· 15.53 mi
1:31:47
Rank: #493 (-8)
Half → 25K
14:32 | 6:00/mi
30K· 18.64 mi
1:50:38
Rank: #482 (+11)
25K → 30K
18:51 | 6:04/mi
20M
1:58:52
Rank: #467 (+15)
30K → 20M
8:14 | 6:04/mi
21M
2:05:22
Rank: #462 (+5)
20M → 21M
6:30 | 6:30/mi
35K· 21.75 mi
2:09:44
Rank: #456 (+6)
21M → 35K
4:22 | 5:50/mi
23M
2:17:26
Rank: #448 (+8)
35K → 23M
7:42 | 6:09/mi
24M
2:23:26
Rank: #452 (-4)
23M → 24M
6:00 | 6:00/mi
40K· 24.85 mi
2:28:42
Rank: #447 (+5)
24M → 40K
5:16 | 6:10/mi
25.2M
2:30:57
Rank: #444 (+3)
40K → 25.2M
2:15 | 6:31/mi
Finish· 26.22 mi
2:37:05
Rank: #436 (+8)
25.2M → Finish
6:08 | 6:01/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:17:15
Pace5:54 /mi
2nd Half
Distance13.11 mi
Time1:19:50
Pace6:05 /mi
📊Positive Split: 3.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:18:3818:255:5618:25
5:56
-
10K
6.21 mi10:36:4436:315:5318:06
5:50
-0:06
15K
9.32 mi10:54:5854:455:5218:14
5:52
+0:02
20K
12.43 mi11:13:281:13:155:5418:30
5:57
+0:05
Half
13.11 mi11:17:281:17:155:544:00
5:52
-0:05
25K
15.53 mi11:32:001:31:475:5514:32
6:00
+0:08
30K
18.64 mi11:50:511:50:385:5618:51
6:04
+0:04
20M
20.00 mi11:59:051:58:525:578:14
6:04
0:00
21M
21.00 mi12:05:352:05:225:586:30
6:30
+0:26
35K
21.75 mi12:09:572:09:445:584:22
5:50
-0:40
23M
23.00 mi12:17:392:17:265:597:42
6:09
+0:19
24M
24.00 mi12:23:392:23:265:596:00
6:00
-0:09
40K
24.85 mi12:28:552:28:425:595:16
6:10
+0:10
25.2M
25.20 mi12:31:102:30:575:592:15
6:31
+0:21
Finish
26.22 mi12:37:182:37:056:006:08
6:01
-0:30

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

5:50 /mi

Average Pace

6:00 /mi

Slowest Pace

6:31 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:28:20

94% of race

Time at Steady Pace

8:45

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 5:59 /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 mi10:18:3818:255:5618:25
5:56
#579
10K
6.21 mi10:36:4436:315:5318:06
5:50
#515
15K
9.32 mi10:54:5854:455:5218:14
5:52
#495
20K
12.43 mi11:13:281:13:155:5418:30
5:57
#488
Half
13.11 mi11:17:281:17:155:544:00
5:52
#485
25K
15.53 mi11:32:001:31:475:5514:32
6:00
#493
30K
18.64 mi11:50:511:50:385:5618:51
6:04
#482
20M
20.00 mi11:59:051:58:525:578:14
6:04
#467
21M
21.00 mi12:05:352:05:225:586:30
6:30
#462
35K
21.75 mi12:09:572:09:445:584:22
5:50
#456
23M
23.00 mi12:17:392:17:265:597:42
6:09
#448
24M
24.00 mi12:23:392:23:265:596:00
6:00
#452
40K
24.85 mi12:28:552:28:425:595:16
6:10
#447
25.2M
25.20 mi12:31:102:30:575:592:15
6:31
#444
Finish
26.22 mi12:37:182:37:056:006:08
6:01
#436
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi579536536453(Top 2%)418(Top 3%)418(Top 8%)
10K6.21 mi3.10 mi515+64473+63473+63461(Top 2%)426(Top 3%)426(Top 8%)
15K9.32 mi3.11 mi495+20455+18455+18453(Top 2%)418(Top 3%)418(Top 8%)
20K12.43 mi3.11 mi488+7449+6449+6499(Top 2%)459(Top 3%)459(Top 9%)
Half13.11 mi0.68 mi485+3446+3446+3476(Top 2%)438(Top 3%)438(Top 8%)
25K15.53 mi2.42 mi493-8453-7453-7536(Top 2%)499(Top 3%)499(Top 9%)
30K18.64 mi3.11 mi482+11444+9444+9461(Top 2%)429(Top 3%)429(Top 8%)
20M20.00 mi1.36 mi467+15432+12432+12424(Top 2%)390(Top 3%)390(Top 7%)
21M21.00 mi1.00 mi462+5427+5427+5640(Top 2%)602(Top 4%)602(Top 11%)
35K21.75 mi0.75 mi456+6421+6421+6420(Top 2%)389(Top 3%)389(Top 7%)
23M23.00 mi1.25 mi448+8412+9412+9534(Top 2%)503(Top 3%)503(Top 10%)
24M24.00 mi1.00 mi452-4416-4416-4538(Top 2%)508(Top 3%)508(Top 10%)
40K24.85 mi0.85 mi447+5411+5411+5582(Top 2%)548(Top 4%)548(Top 10%)
25.2M25.20 mi0.35 mi444+3409+2409+2526(Top 2%)494(Top 3%)494(Top 9%)
Finish26.22 mi1.02 mi436+8401+8401+8751(Top 3%)718(Top 5%)718(Top 14%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 2%
×21stories
+97ft-345ft

Overall

453

Males

418

M18-39

418

5K→10K

3.1 - 6.2 mi

Top 2%
×5stories
+79ft-138ft

Overall

461

Males

426

M18-39

426

10K→15K

6.2 - 9.3 mi

Top 2%
×3stories
+67ft-78ft

Overall

453

Males

418

M18-39

418

15K→20K

9.3 - 12.4 mi

Top 2%
×5stories
+106ft-86ft

Overall

499

Males

459

M18-39

459

20K→Half

12.4 - 13.1 mi

Top 2%
×2stories
+19ft-37ft

Overall

476

Males

438

M18-39

438

Half→25K

13.1 - 15.5 mi

Top 2%
×4stories
+66ft-88ft

Overall

536

Males

499

M18-39

499

25K→30K

15.5 - 18.6 mi

Top 2%
×9stories
+181ft-148ft

Overall

461

Males

429

M18-39

429

30K→20M

18.6 - 20.0 mi

Top 2%
×5stories
+64ft-50ft

Overall

424

Males

390

M18-39

390

20M→21M

20.0 - 21.0 mi

Top 2%
×8stories
+106ft-24ft

Overall

640

Males

602

M18-39

602

21M→35K

21.0 - 21.8 mi

Top 2%
×7stories
+17ft-86ft

Overall

420

Males

389

M18-39

389

35K→23M

21.8 - 23.0 mi

Top 2%
×5stories
+23ft-63ft

Overall

534

Males

503

M18-39

503

23M→24M

23.0 - 24.0 mi

Top 2%
×6stories
+12ft-82ft

Overall

538

Males

508

M18-39

508

24M→40K

24.0 - 24.9 mi

Top 2%
×1story
+6ft-20ft

Overall

582

Males

548

M18-39

548

40K→25.2M

24.9 - 25.2 mi

Top 2%
×1story
+13ft-16ft

Overall

526

Males

494

M18-39

494

25.2M→Finish

25.2 - 26.2 mi

Top 3%
×2stories
+22ft-21ft

Overall

751

Males

718

M18-39

718

Passing Analysis

Category:
Athletes Passed
240
Passed By
97
Net Change
+143
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#579
5K → 10K7511+64#579#515
10K → 15K266+20#515#495
15K → 20K2316+7#495#488
20K → Half41+3#488#485
Half → 25K816-8#485#493
25K → 30K2514+11#493#482
30K → 20M172+15#482#467
20M → 21M94+5#467#462
21M → 35K60+6#462#456
35K → 23M135+8#456#448
23M → 24M48-4#448#452
24M → 40K83+5#452#447
40K → 25.2M74+3#447#444
25.2M → Finish157+8#444#436
TOTALS24097+143
📊

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