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BOSTON MARATHON 2023

Joseph Kafka

Bib: 3835•M

ID

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 10%
Gender (Male)
#0 / 15176
Top 16%
Masters (Masters Men)
#0 / 9891
Top 6%
Division (M40-44)
#0 / 2241
Top 16%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:26
Rank: #2710
Start → 5K
20:26 | 6:35/mi
10K· 6.21 mi
40:15
Rank: #2373 (+337)
5K → 10K
19:49 | 6:23/mi
15K· 9.32 mi
1:00:11
Rank: #2298 (+75)
10K → 15K
19:56 | 6:25/mi
20K· 12.43 mi
1:20:16
Rank: #2235 (+63)
15K → 20K
20:05 | 6:28/mi
Half· 13.11 mi
1:24:36
Rank: #2220 (+15)
20K → Half
4:20 | 6:21/mi
25K· 15.53 mi
1:40:20
Rank: #2194 (+26)
Half → 25K
15:44 | 6:29/mi
30K· 18.64 mi
2:01:19
Rank: #2276 (-82)
25K → 30K
20:59 | 6:45/mi
20M
2:10:35
Rank: #2290 (-14)
30K → 20M
9:16 | 6:49/mi
21M
2:17:51
Rank: #2315 (-25)
20M → 21M
7:16 | 7:16/mi
35K· 21.75 mi
2:22:49
Rank: #2324 (-9)
21M → 35K
4:58 | 6:38/mi
23M
2:31:33
Rank: #2360 (-36)
35K → 23M
8:44 | 6:59/mi
24M
2:38:28
Rank: #2397 (-37)
23M → 24M
6:55 | 6:55/mi
40K· 24.85 mi
2:44:42
Rank: #2453 (-56)
24M → 40K
6:14 | 7:17/mi
25.2M
2:47:24
Rank: #2497 (-44)
40K → 25.2M
2:42 | 7:50/mi
Finish· 26.22 mi
2:54:38
Rank: #2610 (-113)
25.2M → Finish
7:14 | 7:06/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:24:36
Pace6:27 /mi
2nd Half
Distance13.11 mi
Time1:30:02
Pace6:52 /mi
📊Positive Split: 6.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:4020:266:3520:26
6:35
-
10K
6.21 mi10:41:2940:156:2919:49
6:23
-0:12
15K
9.32 mi11:01:251:00:116:2719:56
6:25
+0:02
20K
12.43 mi11:21:301:20:166:2820:05
6:28
+0:03
Half
13.11 mi11:25:501:24:366:274:20
6:21
-0:07
25K
15.53 mi11:41:341:40:206:2815:44
6:29
+0:08
30K
18.64 mi12:02:332:01:196:3020:59
6:45
+0:16
20M
20.00 mi12:11:492:10:356:329:16
6:49
+0:04
21M
21.00 mi12:19:052:17:516:347:16
7:16
+0:27
35K
21.75 mi12:24:032:22:496:344:58
6:38
-0:38
23M
23.00 mi12:32:472:31:336:358:44
6:59
+0:21
24M
24.00 mi12:39:422:38:286:366:55
6:55
-0:04
40K
24.85 mi12:45:562:44:426:386:14
7:17
+0:22
25.2M
25.20 mi12:48:382:47:246:392:42
7:50
+0:33
Finish
26.22 mi12:55:522:54:386:407:14
7:06
-0:44

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

6:21 /mi

Average Pace

6:40 /mi

Slowest Pace

7:50 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:19:54

46% of race

Time at Steady Pace

1:02:34

36% of race

Time at Slower Pace

32:10

18% of race

Average Pace: 6:40 /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 mi10:21:4020:266:3520:26
6:35
#2710
10K
6.21 mi10:41:2940:156:2919:49
6:23
#2373
15K
9.32 mi11:01:251:00:116:2719:56
6:25
#2298
20K
12.43 mi11:21:301:20:166:2820:05
6:28
#2235
Half
13.11 mi11:25:501:24:366:274:20
6:21
#2220
25K
15.53 mi11:41:341:40:206:2815:44
6:29
#2194
30K
18.64 mi12:02:332:01:196:3020:59
6:45
#2276
20M
20.00 mi12:11:492:10:356:329:16
6:49
#2290
21M
21.00 mi12:19:052:17:516:347:16
7:16
#2315
35K
21.75 mi12:24:032:22:496:344:58
6:38
#2324
23M
23.00 mi12:32:472:31:336:358:44
6:59
#2360
24M
24.00 mi12:39:422:38:286:366:55
6:55
#2397
40K
24.85 mi12:45:562:44:426:386:14
7:17
#2453
25.2M
25.20 mi12:48:382:47:246:392:42
7:50
#2497
Finish
26.22 mi12:55:522:54:386:407:14
7:06
#2610
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi2710258125812184(Top 8%)2097(Top 14%)2097(Top 94%)
10K6.21 mi3.10 mi2373+3372265+3162265+3162130(Top 8%)2041(Top 13%)2041(Top 91%)
15K9.32 mi3.11 mi2298+752201+642201+642184(Top 8%)2097(Top 14%)2097(Top 94%)
20K12.43 mi3.11 mi2235+632140+612140+612106(Top 8%)2021(Top 13%)2021(Top 90%)
Half13.11 mi0.68 mi2220+152126+142126+142030(Top 8%)1953(Top 13%)1953(Top 87%)
25K15.53 mi2.42 mi2194+262104+222104+222128(Top 8%)2041(Top 13%)2041(Top 91%)
30K18.64 mi3.11 mi2276-822184-802184-802702(Top 10%)2566(Top 17%)2566(Top 115%)
20M20.00 mi1.36 mi2290-142197-132197-132918(Top 11%)2743(Top 18%)2743(Top 122%)
21M21.00 mi1.00 mi2315-252218-212218-213423(Top 13%)3181(Top 21%)3181(Top 142%)
35K21.75 mi0.75 mi2324-92227-92227-93195(Top 12%)2980(Top 20%)2980(Top 133%)
23M23.00 mi1.25 mi2360-362259-322259-323633(Top 14%)3357(Top 22%)3357(Top 150%)
24M24.00 mi1.00 mi2397-372294-352294-354224(Top 16%)3836(Top 25%)3836(Top 171%)
40K24.85 mi0.85 mi2453-562344-502344-505324(Top 20%)4554(Top 30%)4554(Top 203%)
25.2M25.20 mi0.35 mi2497-442383-392383-395429(Top 20%)4528(Top 30%)4528(Top 202%)
Finish26.22 mi1.02 mi2610-1132488-1052488-1055775(Top 22%)4767(Top 31%)4767(Top 213%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 8%
×21stories
+97ft-345ft

Overall

2184

Males

2097

M40-44

2097

5K→10K

3.1 - 6.2 mi

Top 8%
×5stories
+79ft-138ft

Overall

2130

Males

2041

M40-44

2041

10K→15K

6.2 - 9.3 mi

Top 8%
×3stories
+67ft-78ft

Overall

2184

Males

2097

M40-44

2097

15K→20K

9.3 - 12.4 mi

Top 8%
×5stories
+106ft-86ft

Overall

2106

Males

2021

M40-44

2021

20K→Half

12.4 - 13.1 mi

Top 8%
×2stories
+19ft-37ft

Overall

2030

Males

1953

M40-44

1953

Half→25K

13.1 - 15.5 mi

Top 8%
×4stories
+66ft-88ft

Overall

2128

Males

2041

M40-44

2041

25K→30K

15.5 - 18.6 mi

Top 10%
×9stories
+181ft-148ft

Overall

2702

Males

2566

M40-44

2566

30K→20M

18.6 - 20.0 mi

Top 11%
×5stories
+64ft-50ft

Overall

2918

Males

2743

M40-44

2743

20M→21M

20.0 - 21.0 mi

Top 13%
×8stories
+106ft-24ft

Overall

3423

Males

3181

M40-44

3181

21M→35K

21.0 - 21.8 mi

Top 12%
×7stories
+17ft-86ft

Overall

3195

Males

2980

M40-44

2980

35K→23M

21.8 - 23.0 mi

Top 14%
×5stories
+23ft-63ft

Overall

3633

Males

3357

M40-44

3357

23M→24M

23.0 - 24.0 mi

Top 16%
×6stories
+12ft-82ft

Overall

4224

Males

3836

M40-44

3836

24M→40K

24.0 - 24.9 mi

Top 20%
×1story
+6ft-20ft

Overall

5324

Males

4554

M40-44

4554

40K→25.2M

24.9 - 25.2 mi

Top 20%
×1story
+13ft-16ft

Overall

5429

Males

4528

M40-44

4528

25.2M→Finish

25.2 - 26.2 mi

Top 22%
×2stories
+22ft-21ft

Overall

5775

Males

4767

M40-44

4767

Passing Analysis

Category:
Athletes Passed
844
Passed By
744
Net Change
+100
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2710
5K → 10K36730+337#2710#2373
10K → 15K11944+75#2373#2298
15K → 20K9936+63#2298#2235
20K → Half194+15#2235#2220
Half → 25K5832+26#2220#2194
25K → 30K38120-82#2194#2276
30K → 20M3145-14#2276#2290
20M → 21M2550-25#2290#2315
21M → 35K1928-9#2315#2324
35K → 23M2763-36#2324#2360
23M → 24M1552-37#2360#2397
24M → 40K1167-56#2397#2453
40K → 25.2M751-44#2453#2497
25.2M → Finish9122-113#2497#2610
TOTALS844744+100
📊

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