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BOSTON MARATHON 2023

Erik Chazin

Bib: 1337•M

VA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 10%
Gender (Male)
#0 / 15176
Top 16%
Division (M18-39)
#0 / 5285
Top 36%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:52
Rank: #3797
Start → 5K
20:52 | 6:43/mi
10K· 6.21 mi
41:33
Rank: #3830 (-33)
5K → 10K
20:41 | 6:39/mi
15K· 9.32 mi
1:02:21
Rank: #3901 (-71)
10K → 15K
20:48 | 6:42/mi
20K· 12.43 mi
1:23:05
Rank: #3721 (+180)
15K → 20K
20:44 | 6:40/mi
Half· 13.11 mi
1:27:37
Rank: #3724 (-3)
20K → Half
4:32 | 6:39/mi
25K· 15.53 mi
1:43:54
Rank: #3663 (+61)
Half → 25K
16:17 | 6:43/mi
30K· 18.64 mi
2:04:34
Rank: #3303 (+360)
25K → 30K
20:40 | 6:39/mi
20M
2:13:19
Rank: #3039 (+264)
30K → 20M
8:45 | 6:26/mi
21M
2:20:02
Rank: #2863 (+176)
20M → 21M
6:43 | 6:43/mi
35K· 21.75 mi
2:24:40
Rank: #2759 (+104)
21M → 35K
4:38 | 6:12/mi
23M
2:32:44
Rank: #2590 (+169)
35K → 23M
8:04 | 6:27/mi
24M
2:39:08
Rank: #2513 (+77)
23M → 24M
6:24 | 6:24/mi
40K· 24.85 mi
2:44:50
Rank: #2484 (+29)
24M → 40K
5:42 | 6:40/mi
25.2M
2:47:22
Rank: #2484
40K → 25.2M
2:32 | 7:21/mi
Finish· 26.22 mi
2:54:37
Rank: #2607 (-123)
25.2M → Finish
7:15 | 7:07/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:27:37
Pace6:41 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:27:00
Pace6:38 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:0920:526:4320:52
6:43
-
10K
6.21 mi10:41:5041:336:4120:41
6:39
-0:04
15K
9.32 mi11:02:381:02:216:4120:48
6:42
+0:03
20K
12.43 mi11:23:221:23:056:4120:44
6:40
-0:02
Half
13.11 mi11:27:541:27:376:414:32
6:39
-0:01
25K
15.53 mi11:44:111:43:546:4116:17
6:43
+0:04
30K
18.64 mi12:04:512:04:346:4120:40
6:39
-0:04
20M
20.00 mi12:13:362:13:196:408:45
6:26
-0:13
21M
21.00 mi12:20:192:20:026:406:43
6:43
+0:17
35K
21.75 mi12:24:572:24:406:394:38
6:12
-0:31
23M
23.00 mi12:33:012:32:446:388:04
6:27
+0:15
24M
24.00 mi12:39:252:39:086:386:24
6:24
-0:03
40K
24.85 mi12:45:072:44:506:385:42
6:40
+0:16
25.2M
25.20 mi12:47:392:47:226:382:32
7:21
+0:41
Finish
26.22 mi12:54:542:54:376:407:15
7:07
-0:14

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

6:12 /mi

Average Pace

6:40 /mi

Slowest Pace

7:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:44:50

94% of race

Time at Steady Pace

7:15

4% of race

Time at Slower Pace

2:32

1% 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 mi10:21:0920:526:4320:52
6:43
#3797
10K
6.21 mi10:41:5041:336:4120:41
6:39
#3830
15K
9.32 mi11:02:381:02:216:4120:48
6:42
#3901
20K
12.43 mi11:23:221:23:056:4120:44
6:40
#3721
Half
13.11 mi11:27:541:27:376:414:32
6:39
#3724
25K
15.53 mi11:44:111:43:546:4116:17
6:43
#3663
30K
18.64 mi12:04:512:04:346:4120:40
6:39
#3303
20M
20.00 mi12:13:362:13:196:408:45
6:26
#3039
21M
21.00 mi12:20:192:20:026:406:43
6:43
#2863
35K
21.75 mi12:24:572:24:406:394:38
6:12
#2759
23M
23.00 mi12:33:012:32:446:388:04
6:27
#2590
24M
24.00 mi12:39:252:39:086:386:24
6:24
#2513
40K
24.85 mi12:45:072:44:506:385:42
6:40
#2484
25.2M
25.20 mi12:47:392:47:226:382:32
7:21
#2484
Finish
26.22 mi12:54:542:54:376:407:15
7:07
#2607
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3797356835684058(Top 15%)3807(Top 25%)3807(Top 72%)
10K6.21 mi3.10 mi3830-333605-373605-373928(Top 15%)3698(Top 24%)3698(Top 70%)
15K9.32 mi3.11 mi3901-713674-693674-694058(Top 15%)3807(Top 25%)3807(Top 72%)
20K12.43 mi3.11 mi3721+1803519+1553519+1553347(Top 13%)3175(Top 21%)3175(Top 60%)
Half13.11 mi0.68 mi3724-33520-13520-13715(Top 14%)3499(Top 23%)3499(Top 66%)
25K15.53 mi2.42 mi3663+613462+583462+583456(Top 13%)3269(Top 22%)3269(Top 62%)
30K18.64 mi3.11 mi3303+3603134+3283134+3282191(Top 8%)2092(Top 14%)2092(Top 40%)
20M20.00 mi1.36 mi3039+2642896+2382896+2381256(Top 5%)1197(Top 8%)1197(Top 23%)
21M21.00 mi1.00 mi2863+1762735+1612735+1611159(Top 4%)1105(Top 7%)1105(Top 21%)
35K21.75 mi0.75 mi2759+1042638+972638+971251(Top 5%)1194(Top 8%)1194(Top 23%)
23M23.00 mi1.25 mi2590+1692476+1622476+1621260(Top 5%)1191(Top 8%)1191(Top 23%)
24M24.00 mi1.00 mi2513+772403+732403+731690(Top 6%)1598(Top 11%)1598(Top 30%)
40K24.85 mi0.85 mi2484+292373+302373+302191(Top 8%)2042(Top 13%)2042(Top 39%)
25.2M25.20 mi0.35 mi24842370+32370+33108(Top 12%)2831(Top 19%)2831(Top 54%)
Finish26.22 mi1.02 mi2607-1232485-1152485-1155867(Top 22%)4833(Top 32%)4833(Top 91%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 15%
×21stories
+97ft-345ft

Overall

4058

Males

3807

M18-39

3807

5K→10K

3.1 - 6.2 mi

Top 15%
×5stories
+79ft-138ft

Overall

3928

Males

3698

M18-39

3698

10K→15K

6.2 - 9.3 mi

Top 15%
×3stories
+67ft-78ft

Overall

4058

Males

3807

M18-39

3807

15K→20K

9.3 - 12.4 mi

Top 13%
×5stories
+106ft-86ft

Overall

3347

Males

3175

M18-39

3175

20K→Half

12.4 - 13.1 mi

Top 14%
×2stories
+19ft-37ft

Overall

3715

Males

3499

M18-39

3499

Half→25K

13.1 - 15.5 mi

Top 13%
×4stories
+66ft-88ft

Overall

3456

Males

3269

M18-39

3269

25K→30K

15.5 - 18.6 mi

Top 8%
×9stories
+181ft-148ft

Overall

2191

Males

2092

M18-39

2092

30K→20M

18.6 - 20.0 mi

Top 5%
×5stories
+64ft-50ft

Overall

1256

Males

1197

M18-39

1197

20M→21M

20.0 - 21.0 mi

Top 4%
×8stories
+106ft-24ft

Overall

1159

Males

1105

M18-39

1105

21M→35K

21.0 - 21.8 mi

Top 5%
×7stories
+17ft-86ft

Overall

1251

Males

1194

M18-39

1194

35K→23M

21.8 - 23.0 mi

Top 5%
×5stories
+23ft-63ft

Overall

1260

Males

1191

M18-39

1191

23M→24M

23.0 - 24.0 mi

Top 6%
×6stories
+12ft-82ft

Overall

1690

Males

1598

M18-39

1598

24M→40K

24.0 - 24.9 mi

Top 8%
×1story
+6ft-20ft

Overall

2191

Males

2042

M18-39

2042

40K→25.2M

24.9 - 25.2 mi

Top 12%
×1story
+13ft-16ft

Overall

3108

Males

2831

M18-39

2831

25.2M→Finish

25.2 - 26.2 mi

Top 22%
×2stories
+22ft-21ft

Overall

5867

Males

4833

M18-39

4833

Passing Analysis

Category:
Athletes Passed
1848
Passed By
658
Net Change
+1190
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3797
5K → 10K197230-33#3797#3830
10K → 15K82153-71#3830#3901
15K → 20K20929+180#3901#3721
20K → Half1922-3#3721#3724
Half → 25K11251+61#3724#3663
25K → 30K3633+360#3663#3303
30K → 20M2640+264#3303#3039
20M → 21M1760+176#3039#2863
21M → 35K1073+104#2863#2759
35K → 23M1690+169#2759#2590
23M → 24M781+77#2590#2513
24M → 40K4819+29#2513#2484
40K → 25.2M15150#2484#2484
25.2M → Finish9132-123#2484#2607
TOTALS1848658+1190
📊

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