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BOSTON MARATHON 2023

David Krulewich

Bib: 6529•M

CT

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 15%
Gender (Male)
#0 / 15176
Top 25%
Division (M18-39)
#0 / 5285
Top 49%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:28
Rank: #2797
Start → 5K
20:28 | 6:35/mi
10K· 6.21 mi
40:43
Rank: #2830 (-33)
5K → 10K
20:15 | 6:31/mi
15K· 9.32 mi
1:00:58
Rank: #2779 (+51)
10K → 15K
20:15 | 6:31/mi
20K· 12.43 mi
1:21:29
Rank: #2794 (-15)
15K → 20K
20:31 | 6:36/mi
Half· 13.11 mi
1:25:56
Rank: #2782 (+12)
20K → Half
4:27 | 6:31/mi
25K· 15.53 mi
1:42:13
Rank: #2868 (-86)
Half → 25K
16:17 | 6:43/mi
30K· 18.64 mi
2:04:00
Rank: #3053 (-185)
25K → 30K
21:47 | 7:01/mi
20M
2:13:47
Rank: #3209 (-156)
30K → 20M
9:47 | 7:12/mi
21M
2:22:20
Rank: #3683 (-474)
20M → 21M
8:33 | 8:33/mi
35K· 21.75 mi
2:27:24
Rank: #3684 (-1)
21M → 35K
5:04 | 6:46/mi
23M
2:36:32
Rank: #3802 (-118)
35K → 23M
9:08 | 7:18/mi
24M
2:43:30
Rank: #3840 (-38)
23M → 24M
6:58 | 6:58/mi
40K· 24.85 mi
2:49:43
Rank: #3932 (-92)
24M → 40K
6:13 | 7:16/mi
25.2M
2:52:25
Rank: #3965 (-33)
40K → 25.2M
2:42 | 7:50/mi
Finish· 26.22 mi
2:59:26
Rank: #4011 (-46)
25.2M → Finish
7:01 | 6:53/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:25:56
Pace6:33 /mi
2nd Half
Distance13.11 mi
Time1:33:30
Pace7:08 /mi
📊Positive Split: 8.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:4020:286:3520:28
6:35
-
10K
6.21 mi10:43:5540:436:3320:15
6:31
-0:04
15K
9.32 mi11:04:101:00:586:3220:15
6:31
0:00
20K
12.43 mi11:24:411:21:296:3320:31
6:36
+0:05
Half
13.11 mi11:29:081:25:566:334:27
6:31
-0:05
25K
15.53 mi11:45:251:42:136:3516:17
6:43
+0:12
30K
18.64 mi12:07:122:04:006:3921:47
7:01
+0:18
20M
20.00 mi12:16:592:13:476:419:47
7:12
+0:11
21M
21.00 mi12:25:322:22:206:478:33
8:33
+1:21
35K
21.75 mi12:30:362:27:246:475:04
6:46
-1:47
23M
23.00 mi12:39:442:36:326:489:08
7:18
+0:32
24M
24.00 mi12:46:422:43:306:496:58
6:58
-0:20
40K
24.85 mi12:52:552:49:436:506:13
7:16
+0:18
25.2M
25.20 mi12:55:372:52:256:512:42
7:50
+0:34
Finish
26.22 mi13:02:382:59:266:517:01
6:53
-0:57

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

6:31 /mi

Average Pace

6:51 /mi

Slowest Pace

8:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:25:56

48% of race

Time at Steady Pace

57:07

32% of race

Time at Slower Pace

36:23

20% of race

Average Pace: 6:51 /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 mi10:23:4020:286:3520:28
6:35
#2797
10K
6.21 mi10:43:5540:436:3320:15
6:31
#2830
15K
9.32 mi11:04:101:00:586:3220:15
6:31
#2779
20K
12.43 mi11:24:411:21:296:3320:31
6:36
#2794
Half
13.11 mi11:29:081:25:566:334:27
6:31
#2782
25K
15.53 mi11:45:251:42:136:3516:17
6:43
#2868
30K
18.64 mi12:07:122:04:006:3921:47
7:01
#3053
20M
20.00 mi12:16:592:13:476:419:47
7:12
#3209
21M
21.00 mi12:25:322:22:206:478:33
8:33
#3683
35K
21.75 mi12:30:362:27:246:475:04
6:46
#3684
23M
23.00 mi12:39:442:36:326:489:08
7:18
#3802
24M
24.00 mi12:46:422:43:306:496:58
6:58
#3840
40K
24.85 mi12:52:552:49:436:506:13
7:16
#3932
25.2M
25.20 mi12:55:372:52:256:512:42
7:50
#3965
Finish
26.22 mi13:02:382:59:266:517:01
6:53
#4011
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2797266026602756(Top 10%)2632(Top 17%)2632(Top 50%)
10K6.21 mi3.10 mi2830-332696-362696-362920(Top 11%)2790(Top 18%)2790(Top 53%)
15K9.32 mi3.11 mi2779+512654+422654+422756(Top 10%)2632(Top 17%)2632(Top 50%)
20K12.43 mi3.11 mi2794-152670-162670-162894(Top 11%)2760(Top 18%)2760(Top 52%)
Half13.11 mi0.68 mi2782+122661+92661+93010(Top 11%)2875(Top 19%)2875(Top 54%)
25K15.53 mi2.42 mi2868-862741-802741-803516(Top 13%)3321(Top 22%)3321(Top 63%)
30K18.64 mi3.11 mi3053-1852909-1682909-1684438(Top 17%)4115(Top 27%)4115(Top 78%)
20M20.00 mi1.36 mi3209-1563049-1403049-1405131(Top 19%)4639(Top 31%)4639(Top 88%)
21M21.00 mi1.00 mi3683-4743479-4303479-43010807(Top 41%)8007(Top 53%)8007(Top 152%)
35K21.75 mi0.75 mi3684-13476+33476+34081(Top 15%)3731(Top 25%)3731(Top 71%)
23M23.00 mi1.25 mi3802-1183579-1033579-1035314(Top 20%)4689(Top 31%)4689(Top 89%)
24M24.00 mi1.00 mi3840-383607-283607-284552(Top 17%)4088(Top 27%)4088(Top 77%)
40K24.85 mi0.85 mi3932-923682-753682-755310(Top 20%)4540(Top 30%)4540(Top 86%)
25.2M25.20 mi0.35 mi3965-333711-293711-295662(Top 21%)4686(Top 31%)4686(Top 89%)
Finish26.22 mi1.02 mi4011-463753-423753-424589(Top 17%)3978(Top 26%)3978(Top 75%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 10%
×21stories
+97ft-345ft

Overall

2756

Males

2632

M18-39

2632

5K→10K

3.1 - 6.2 mi

Top 11%
×5stories
+79ft-138ft

Overall

2920

Males

2790

M18-39

2790

10K→15K

6.2 - 9.3 mi

Top 10%
×3stories
+67ft-78ft

Overall

2756

Males

2632

M18-39

2632

15K→20K

9.3 - 12.4 mi

Top 11%
×5stories
+106ft-86ft

Overall

2894

Males

2760

M18-39

2760

20K→Half

12.4 - 13.1 mi

Top 11%
×2stories
+19ft-37ft

Overall

3010

Males

2875

M18-39

2875

Half→25K

13.1 - 15.5 mi

Top 13%
×4stories
+66ft-88ft

Overall

3516

Males

3321

M18-39

3321

25K→30K

15.5 - 18.6 mi

Top 17%
×9stories
+181ft-148ft

Overall

4438

Males

4115

M18-39

4115

30K→20M

18.6 - 20.0 mi

Top 19%
×5stories
+64ft-50ft

Overall

5131

Males

4639

M18-39

4639

20M→21M

20.0 - 21.0 mi

Top 41%
×8stories
+106ft-24ft

Overall

10807

Males

8007

M18-39

8007

21M→35K

21.0 - 21.8 mi

Top 15%
×7stories
+17ft-86ft

Overall

4081

Males

3731

M18-39

3731

35K→23M

21.8 - 23.0 mi

Top 20%
×5stories
+23ft-63ft

Overall

5314

Males

4689

M18-39

4689

23M→24M

23.0 - 24.0 mi

Top 17%
×6stories
+12ft-82ft

Overall

4552

Males

4088

M18-39

4088

24M→40K

24.0 - 24.9 mi

Top 20%
×1story
+6ft-20ft

Overall

5310

Males

4540

M18-39

4540

40K→25.2M

24.9 - 25.2 mi

Top 21%
×1story
+13ft-16ft

Overall

5662

Males

4686

M18-39

4686

25.2M→Finish

25.2 - 26.2 mi

Top 17%
×2stories
+22ft-21ft

Overall

4589

Males

3978

M18-39

3978

Passing Analysis

Category:
Athletes Passed
615
Passed By
1829
Net Change
-1214
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2797
5K → 10K144177-33#2797#2830
10K → 15K11968+51#2830#2779
15K → 20K6479-15#2779#2794
20K → Half219+12#2794#2782
Half → 25K35121-86#2782#2868
25K → 30K41226-185#2868#3053
30K → 20M16172-156#3053#3209
20M → 21M3477-474#3209#3683
21M → 35K2324-1#3683#3684
35K → 23M34152-118#3684#3802
23M → 24M3977-38#3802#3840
24M → 40K27119-92#3840#3932
40K → 25.2M1750-33#3932#3965
25.2M → Finish3278-46#3965#4011
TOTALS6151829-1214
📊

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