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BOSTON MARATHON 2024

John Krolak

Bib: 4082•M

CO

0:00
0:00
/ mi
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Overall
#0 / 25550
Top 21%
Gender (Male)
#0 / 14578
Top 31%
Division (M18-39)
#0 / 4849
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:42
Rank: #4511
Start → 5K
20:42 | 6:40/mi
10K· 6.21 mi
41:11
Rank: #3978 (+533)
5K → 10K
20:29 | 6:36/mi
15K· 9.32 mi
1:01:44
Rank: #3741 (+237)
10K → 15K
20:33 | 6:37/mi
20K· 12.43 mi
1:24:00
Rank: #4418 (-677)
15K → 20K
22:16 | 7:10/mi
Half· 13.11 mi
1:28:28
Rank: #4306 (+112)
20K → Half
4:28 | 6:33/mi
25K· 15.53 mi
1:44:43
Rank: #3922 (+384)
Half → 25K
16:15 | 6:42/mi
30K· 18.64 mi
2:06:29
Rank: #3609 (+313)
25K → 30K
21:46 | 7:00/mi
20M
2:16:23
Rank: #3551 (+58)
30K → 20M
9:54 | 7:17/mi
21M
2:23:54
Rank: #3425 (+126)
20M → 21M
7:31 | 7:31/mi
35K· 21.75 mi
2:29:23
Rank: #3448 (-23)
21M → 35K
5:29 | 7:20/mi
23M
2:44:06
Rank: #4653 (-1205)
35K → 23M
14:43 | 11:45/mi
24M
2:52:15
Rank: #4682 (-29)
23M → 24M
8:09 | 8:09/mi
40K· 24.85 mi
3:00:14
Rank: #4846 (-164)
24M → 40K
7:59 | 9:20/mi
25.2M
3:04:01
Rank: #4993 (-147)
40K → 25.2M
3:47 | 10:58/mi
Finish· 26.22 mi
3:13:10
Rank: #5272 (-279)
25.2M → Finish
9:09 | 8:59/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:28:28
Pace6:45 /mi
2nd Half
Distance13.11 mi
Time1:44:42
Pace7:59 /mi
📊Positive Split: 18.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:1320:426:4020:42
6:40
-
10K
6.21 mi10:44:4241:116:3820:29
6:36
-0:04
15K
9.32 mi11:05:151:01:446:3720:33
6:37
+0:01
20K
12.43 mi11:27:311:24:006:4622:16
7:10
+0:33
Half
13.11 mi11:31:591:28:286:454:28
6:33
-0:37
25K
15.53 mi11:48:141:44:436:4416:15
6:42
+0:09
30K
18.64 mi12:10:002:06:296:4721:46
7:00
+0:18
20M
20.00 mi12:19:542:16:236:499:54
7:17
+0:17
21M
21.00 mi12:27:252:23:546:517:31
7:31
+0:14
35K
21.75 mi12:32:542:29:236:525:29
7:20
-0:11
23M
23.00 mi12:47:372:44:067:0814:43
11:45
+4:25
24M
24.00 mi12:55:462:52:157:118:09
8:09
-3:36
40K
24.85 mi13:03:453:00:147:157:59
9:20
+1:11
25.2M
25.20 mi13:07:323:04:017:183:47
10:58
+1:38
Finish
26.22 mi13:16:413:13:107:229:09
8:59
-1:59

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

6:33 /mi

Average Pace

7:22 /mi

Slowest Pace

11:45 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:29:23

77% of race

Time at Slower Pace

43:47

23% of race

Average Pace: 7:22 /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 mi10:24:1320:426:4020:42
6:40
#4511
10K
6.21 mi10:44:4241:116:3820:29
6:36
#3978
15K
9.32 mi11:05:151:01:446:3720:33
6:37
#3741
20K
12.43 mi11:27:311:24:006:4622:16
7:10
#4418
Half
13.11 mi11:31:591:28:286:454:28
6:33
#4306
25K
15.53 mi11:48:141:44:436:4416:15
6:42
#3922
30K
18.64 mi12:10:002:06:296:4721:46
7:00
#3609
20M
20.00 mi12:19:542:16:236:499:54
7:17
#3551
21M
21.00 mi12:27:252:23:546:517:31
7:31
#3425
35K
21.75 mi12:32:542:29:236:525:29
7:20
#3448
23M
23.00 mi12:47:372:44:067:0814:43
11:45
#4653
24M
24.00 mi12:55:462:52:157:118:09
8:09
#4682
40K
24.85 mi13:03:453:00:147:157:59
9:20
#4846
25.2M
25.20 mi13:07:323:04:017:183:47
10:58
#4993
Finish
26.22 mi13:16:413:13:107:229:09
8:59
#5272
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi4511422442243362(Top 13%)3196(Top 22%)3196(Top 66%)
10K6.21 mi3.10 mi3978+5333755+4693755+4693574(Top 14%)3385(Top 23%)3385(Top 70%)
15K9.32 mi3.11 mi3741+2373543+2123543+2123362(Top 13%)3196(Top 22%)3196(Top 66%)
20K12.43 mi3.11 mi4418-6774117-5744117-5746169(Top 24%)5431(Top 37%)5431(Top 112%)
Half13.11 mi0.68 mi4306+1124019+984019+982891(Top 11%)2761(Top 19%)2761(Top 57%)
25K15.53 mi2.42 mi3922+3843689+3303689+3302664(Top 10%)2530(Top 17%)2530(Top 52%)
30K18.64 mi3.11 mi3609+3133396+2933396+2932910(Top 11%)2713(Top 19%)2713(Top 56%)
20M20.00 mi1.36 mi3551+583330+663330+663495(Top 14%)3164(Top 22%)3164(Top 65%)
21M21.00 mi1.00 mi3425+1263210+1203210+1202565(Top 10%)2342(Top 16%)2342(Top 48%)
35K21.75 mi0.75 mi3448-233220-103220-104283(Top 17%)3658(Top 25%)3658(Top 75%)
23M23.00 mi1.25 mi4653-12054204-9844204-98420213(Top 79%)11668(Top 80%)11668(Top 241%)
24M24.00 mi1.00 mi4682-294197+74197+77435(Top 29%)5198(Top 36%)5198(Top 107%)
40K24.85 mi0.85 mi4846-1644299-1024299-10212391(Top 48%)7629(Top 52%)7629(Top 157%)
25.2M25.20 mi0.35 mi4993-1474389-904389-9014318(Top 56%)8555(Top 59%)8555(Top 176%)
Finish26.22 mi1.02 mi5272-2794558-1694558-16914054(Top 55%)8509(Top 58%)8509(Top 175%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 13%
×21stories
+97ft-345ft

Overall

3362

Males

3196

M18-39

3196

5K→10K

3.1 - 6.2 mi

Top 14%
×5stories
+79ft-138ft

Overall

3574

Males

3385

M18-39

3385

10K→15K

6.2 - 9.3 mi

Top 13%
×3stories
+67ft-78ft

Overall

3362

Males

3196

M18-39

3196

15K→20K

9.3 - 12.4 mi

Top 24%
×5stories
+106ft-86ft

Overall

6169

Males

5431

M18-39

5431

20K→Half

12.4 - 13.1 mi

Top 11%
×2stories
+19ft-37ft

Overall

2891

Males

2761

M18-39

2761

Half→25K

13.1 - 15.5 mi

Top 10%
×4stories
+66ft-88ft

Overall

2664

Males

2530

M18-39

2530

25K→30K

15.5 - 18.6 mi

Top 11%
×9stories
+181ft-148ft

Overall

2910

Males

2713

M18-39

2713

30K→20M

18.6 - 20.0 mi

Top 14%
×5stories
+64ft-50ft

Overall

3495

Males

3164

M18-39

3164

20M→21M

20.0 - 21.0 mi

Top 10%
×8stories
+106ft-24ft

Overall

2565

Males

2342

M18-39

2342

21M→35K

21.0 - 21.8 mi

Top 17%
×7stories
+17ft-86ft

Overall

4283

Males

3658

M18-39

3658

35K→23M

21.8 - 23.0 mi

Top 79%
×5stories
+23ft-63ft

Overall

20213

Males

11668

M18-39

11668

23M→24M

23.0 - 24.0 mi

Top 29%
×6stories
+12ft-82ft

Overall

7435

Males

5198

M18-39

5198

24M→40K

24.0 - 24.9 mi

Top 48%
×1story
+6ft-20ft

Overall

12391

Males

7629

M18-39

7629

40K→25.2M

24.9 - 25.2 mi

Top 56%
×1story
+13ft-16ft

Overall

14318

Males

8555

M18-39

8555

25.2M→Finish

25.2 - 26.2 mi

Top 55%
×2stories
+22ft-21ft

Overall

14054

Males

8509

M18-39

8509

Passing Analysis

Category:
Athletes Passed
2142
Passed By
2903
Net Change
-761
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4511
5K → 10K55623+533#4511#3978
10K → 15K27033+237#3978#3741
15K → 20K45722-677#3741#4418
20K → Half1131+112#4418#4306
Half → 25K3873+384#4306#3922
25K → 30K35542+313#3922#3609
30K → 20M11557+58#3609#3551
20M → 21M14822+126#3551#3425
21M → 35K3760-23#3425#3448
35K → 23M61211-1205#3448#4653
23M → 24M6089-29#4653#4682
24M → 40K25189-164#4682#4846
40K → 25.2M8155-147#4846#4993
25.2M → Finish17296-279#4993#5272
TOTALS21422903-761
📊

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