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BOSTON MARATHON 2023

John Chladnicek

Bib: 13209•M

NJ

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 30%
Gender (Male)
#0 / 15176
Top 44%
Masters (Masters Men)
#0 / 9891
Top 31%
Division (M45-49)
#0 / 2252
Top 42%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:30
Rank: #10173
Start → 5K
23:30 | 7:34/mi
10K· 6.21 mi
46:13
Rank: #9471 (+702)
5K → 10K
22:43 | 7:19/mi
15K· 9.32 mi
1:09:07
Rank: #9315 (+156)
10K → 15K
22:54 | 7:22/mi
20K· 12.43 mi
1:32:16
Rank: #9183 (+132)
15K → 20K
23:09 | 7:27/mi
Half· 13.11 mi
1:37:11
Rank: #9111 (+72)
20K → Half
4:55 | 7:12/mi
25K· 15.53 mi
1:55:15
Rank: #8966 (+145)
Half → 25K
18:04 | 7:27/mi
30K· 18.64 mi
2:19:15
Rank: #8919 (+47)
25K → 30K
24:00 | 7:43/mi
20M
2:29:40
Rank: #8813 (+106)
30K → 20M
10:25 | 7:40/mi
21M
2:37:40
Rank: #8719 (+94)
20M → 21M
8:00 | 8:00/mi
35K· 21.75 mi
2:43:03
Rank: #8615 (+104)
21M → 35K
5:23 | 7:12/mi
23M
2:52:38
Rank: #8512 (+103)
35K → 23M
9:35 | 7:39/mi
24M
2:59:57
Rank: #8385 (+127)
23M → 24M
7:19 | 7:19/mi
40K· 24.85 mi
3:06:09
Rank: #8231 (+154)
24M → 40K
6:12 | 7:15/mi
25.2M
3:08:50
Rank: #8169 (+62)
40K → 25.2M
2:41 | 7:47/mi
Finish· 26.22 mi
3:15:33
Rank: #7880 (+289)
25.2M → Finish
6:43 | 6:35/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:37:11
Pace7:25 /mi
2nd Half
Distance13.11 mi
Time1:38:22
Pace7:30 /mi
📊Positive Split: 1.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:14:0023:307:3423:30
7:34
-
10K
6.21 mi11:36:4346:137:2622:43
7:19
-0:15
15K
9.32 mi11:59:371:09:077:2522:54
7:22
+0:03
20K
12.43 mi12:22:461:32:167:2523:09
7:27
+0:05
Half
13.11 mi12:27:411:37:117:254:55
7:12
-0:15
25K
15.53 mi12:45:451:55:157:2518:04
7:27
+0:15
30K
18.64 mi13:09:452:19:157:2824:00
7:43
+0:16
20M
20.00 mi13:20:102:29:407:2910:25
7:40
-0:03
21M
21.00 mi13:28:102:37:407:308:00
8:00
+0:20
35K
21.75 mi13:33:332:43:037:305:23
7:12
-0:48
23M
23.00 mi13:43:082:52:387:309:35
7:39
+0:27
24M
24.00 mi13:50:272:59:577:307:19
7:19
-0:20
40K
24.85 mi13:56:393:06:097:296:12
7:15
-0:04
25.2M
25.20 mi13:59:203:08:507:302:41
7:47
+0:32
Finish
26.22 mi14:06:033:15:337:286:43
6:35
-1:12

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

6:35 /mi

Average Pace

7:28 /mi

Slowest Pace

8:00 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

23:13

12% of race

Time at Steady Pace

1:57:39

60% of race

Time at Slower Pace

54:41

28% of race

Average Pace: 7:27 /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 mi11:14:0023:307:3423:30
7:34
#10173
10K
6.21 mi11:36:4346:137:2622:43
7:19
#9471
15K
9.32 mi11:59:371:09:077:2522:54
7:22
#9315
20K
12.43 mi12:22:461:32:167:2523:09
7:27
#9183
Half
13.11 mi12:27:411:37:117:254:55
7:12
#9111
25K
15.53 mi12:45:451:55:157:2518:04
7:27
#8966
30K
18.64 mi13:09:452:19:157:2824:00
7:43
#8919
20M
20.00 mi13:20:102:29:407:2910:25
7:40
#8813
21M
21.00 mi13:28:102:37:407:308:00
8:00
#8719
35K
21.75 mi13:33:332:43:037:305:23
7:12
#8615
23M
23.00 mi13:43:082:52:387:309:35
7:39
#8512
24M
24.00 mi13:50:272:59:577:307:19
7:19
#8385
40K
24.85 mi13:56:393:06:097:296:12
7:15
#8231
25.2M
25.20 mi13:59:203:08:507:302:41
7:47
#8169
Finish
26.22 mi14:06:033:15:337:286:43
6:35
#7880
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi10173821382139083(Top 34%)7586(Top 50%)7586(Top 337%)
10K6.21 mi3.10 mi9471+7027858+3557858+3558919(Top 34%)7529(Top 50%)7529(Top 334%)
15K9.32 mi3.11 mi9315+1567755+1037755+1039083(Top 34%)7586(Top 50%)7586(Top 337%)
20K12.43 mi3.11 mi9183+1327664+917664+918902(Top 33%)7441(Top 49%)7441(Top 330%)
Half13.11 mi0.68 mi9111+727616+487616+487875(Top 30%)6823(Top 45%)6823(Top 303%)
25K15.53 mi2.42 mi8966+1457523+937523+938399(Top 32%)7060(Top 47%)7060(Top 313%)
30K18.64 mi3.11 mi8919+477452+717452+718814(Top 33%)7163(Top 47%)7163(Top 318%)
20M20.00 mi1.36 mi8813+1067372+807372+807902(Top 30%)6528(Top 43%)6528(Top 290%)
21M21.00 mi1.00 mi8719+947297+757297+757336(Top 28%)6081(Top 40%)6081(Top 270%)
35K21.75 mi0.75 mi8615+1047214+837214+836501(Top 24%)5581(Top 37%)5581(Top 248%)
23M23.00 mi1.25 mi8512+1037124+907124+907438(Top 28%)6079(Top 40%)6079(Top 270%)
24M24.00 mi1.00 mi8385+1277029+957029+956479(Top 24%)5409(Top 36%)5409(Top 240%)
40K24.85 mi0.85 mi8231+1546910+1196910+1195167(Top 19%)4463(Top 29%)4463(Top 198%)
25.2M25.20 mi0.35 mi8169+626862+486862+485299(Top 20%)4479(Top 30%)4479(Top 199%)
Finish26.22 mi1.02 mi7880+2896661+2016661+2012965(Top 11%)2690(Top 18%)2690(Top 119%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 34%
×21stories
+97ft-345ft

Overall

9083

Males

7586

M45-49

7586

5K→10K

3.1 - 6.2 mi

Top 34%
×5stories
+79ft-138ft

Overall

8919

Males

7529

M45-49

7529

10K→15K

6.2 - 9.3 mi

Top 34%
×3stories
+67ft-78ft

Overall

9083

Males

7586

M45-49

7586

15K→20K

9.3 - 12.4 mi

Top 33%
×5stories
+106ft-86ft

Overall

8902

Males

7441

M45-49

7441

20K→Half

12.4 - 13.1 mi

Top 30%
×2stories
+19ft-37ft

Overall

7875

Males

6823

M45-49

6823

Half→25K

13.1 - 15.5 mi

Top 32%
×4stories
+66ft-88ft

Overall

8399

Males

7060

M45-49

7060

25K→30K

15.5 - 18.6 mi

Top 33%
×9stories
+181ft-148ft

Overall

8814

Males

7163

M45-49

7163

30K→20M

18.6 - 20.0 mi

Top 30%
×5stories
+64ft-50ft

Overall

7902

Males

6528

M45-49

6528

20M→21M

20.0 - 21.0 mi

Top 28%
×8stories
+106ft-24ft

Overall

7336

Males

6081

M45-49

6081

21M→35K

21.0 - 21.8 mi

Top 24%
×7stories
+17ft-86ft

Overall

6501

Males

5581

M45-49

5581

35K→23M

21.8 - 23.0 mi

Top 28%
×5stories
+23ft-63ft

Overall

7438

Males

6079

M45-49

6079

23M→24M

23.0 - 24.0 mi

Top 24%
×6stories
+12ft-82ft

Overall

6479

Males

5409

M45-49

5409

24M→40K

24.0 - 24.9 mi

Top 19%
×1story
+6ft-20ft

Overall

5167

Males

4463

M45-49

4463

40K→25.2M

24.9 - 25.2 mi

Top 20%
×1story
+13ft-16ft

Overall

5299

Males

4479

M45-49

4479

25.2M→Finish

25.2 - 26.2 mi

Top 11%
×2stories
+22ft-21ft

Overall

2965

Males

2690

M45-49

2690

Passing Analysis

Category:
Athletes Passed
2818*
Passed By
525
Net Change
+2293
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10173
5K → 10K779*77+702#10173#9471
10K → 15K23276+156#9471#9315
15K → 20K20775+132#9315#9183
20K → Half742+72#9183#9111
Half → 25K18439+145#9111#8966
25K → 30K195148+47#8966#8919
30K → 20M12923+106#8919#8813
20M → 21M12733+94#8813#8719
21M → 35K1084+104#8719#8615
35K → 23M13431+103#8615#8512
23M → 24M13912+127#8512#8385
24M → 40K1584+154#8385#8231
40K → 25.2M620+62#8231#8169
25.2M → Finish2901+289#8169#7880
TOTALS2818*525+2293

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

📊

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