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BOSTON MARATHON 2023

Brian Lozes

Bib: 2454•M

CO

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 14%
Gender (Male)
#0 / 15176
Top 23%
Division (M18-39)
#0 / 5285
Top 47%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:57
Rank: #4060
Start → 5K
20:57 | 6:45/mi
10K· 6.21 mi
41:36
Rank: #3925 (+135)
5K → 10K
20:39 | 6:39/mi
15K· 9.32 mi
1:01:52
Rank: #3465 (+460)
10K → 15K
20:16 | 6:31/mi
20K· 12.43 mi
1:22:23
Rank: #3292 (+173)
15K → 20K
20:31 | 6:36/mi
Half· 13.11 mi
1:26:54
Rank: #3304 (-12)
20K → Half
4:31 | 6:37/mi
25K· 15.53 mi
1:44:01
Rank: #3735 (-431)
Half → 25K
17:07 | 7:04/mi
30K· 18.64 mi
2:05:52
Rank: #3872 (-137)
25K → 30K
21:51 | 7:02/mi
20M
2:15:42
Rank: #4010 (-138)
30K → 20M
9:50 | 7:14/mi
21M
2:23:19
Rank: #4090 (-80)
20M → 21M
7:37 | 7:37/mi
35K· 21.75 mi
2:28:29
Rank: #4118 (-28)
21M → 35K
5:10 | 6:54/mi
23M
2:37:09
Rank: #4042 (+76)
35K → 23M
8:40 | 6:55/mi
24M
2:43:48
Rank: #3966 (+76)
23M → 24M
6:39 | 6:39/mi
40K· 24.85 mi
2:49:29
Rank: #3835 (+131)
24M → 40K
5:41 | 6:39/mi
25.2M
2:51:57
Rank: #3784 (+51)
40K → 25.2M
2:28 | 7:09/mi
Finish· 26.22 mi
2:58:35
Rank: #3691 (+93)
25.2M → Finish
6:38 | 6:31/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:26:54
Pace6:38 /mi
2nd Half
Distance13.11 mi
Time1:31:41
Pace7:00 /mi
📊Positive Split: 5.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:5220:576:4520:57
6:45
-
10K
6.21 mi10:45:3141:366:4220:39
6:39
-0:06
15K
9.32 mi11:05:471:01:526:3820:16
6:31
-0:08
20K
12.43 mi11:26:181:22:236:3820:31
6:36
+0:05
Half
13.11 mi11:30:491:26:546:384:31
6:37
+0:01
25K
15.53 mi11:47:561:44:016:4217:07
7:04
+0:27
30K
18.64 mi12:09:472:05:526:4521:51
7:02
-0:02
20M
20.00 mi12:19:372:15:426:479:50
7:14
+0:12
21M
21.00 mi12:27:142:23:196:497:37
7:37
+0:23
35K
21.75 mi12:32:242:28:296:505:10
6:54
-0:43
23M
23.00 mi12:41:042:37:096:508:40
6:55
+0:01
24M
24.00 mi12:47:432:43:486:506:39
6:39
-0:16
40K
24.85 mi12:53:242:49:296:495:41
6:39
0:00
25.2M
25.20 mi12:55:522:51:576:492:28
7:09
+0:30
Finish
26.22 mi13:02:302:58:356:496:38
6:31
-0:38

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

6:49 /mi

Slowest Pace

7:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:41:08

90% of race

Time at Steady Pace

17:27

10% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:49 /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 mi10:24:5220:576:4520:57
6:45
#4060
10K
6.21 mi10:45:3141:366:4220:39
6:39
#3925
15K
9.32 mi11:05:471:01:526:3820:16
6:31
#3465
20K
12.43 mi11:26:181:22:236:3820:31
6:36
#3292
Half
13.11 mi11:30:491:26:546:384:31
6:37
#3304
25K
15.53 mi11:47:561:44:016:4217:07
7:04
#3735
30K
18.64 mi12:09:472:05:526:4521:51
7:02
#3872
20M
20.00 mi12:19:372:15:426:479:50
7:14
#4010
21M
21.00 mi12:27:142:23:196:497:37
7:37
#4090
35K
21.75 mi12:32:242:28:296:505:10
6:54
#4118
23M
23.00 mi12:41:042:37:096:508:40
6:55
#4042
24M
24.00 mi12:47:432:43:486:506:39
6:39
#3966
40K
24.85 mi12:53:242:49:296:495:41
6:39
#3835
25.2M
25.20 mi12:55:522:51:576:492:28
7:09
#3784
Finish
26.22 mi13:02:302:58:356:496:38
6:31
#3691
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi4060380738072777(Top 10%)2653(Top 17%)2653(Top 50%)
10K6.21 mi3.10 mi3925+1353695+1123695+1123858(Top 14%)3635(Top 24%)3635(Top 69%)
15K9.32 mi3.11 mi3465+4603283+4123283+4122777(Top 10%)2653(Top 17%)2653(Top 50%)
20K12.43 mi3.11 mi3292+1733130+1533130+1532884(Top 11%)2752(Top 18%)2752(Top 52%)
Half13.11 mi0.68 mi3304-123142-123142-123598(Top 14%)3406(Top 22%)3406(Top 64%)
25K15.53 mi2.42 mi3735-4313532-3903532-3905882(Top 22%)5354(Top 35%)5354(Top 101%)
30K18.64 mi3.11 mi3872-1373650-1183650-1184547(Top 17%)4209(Top 28%)4209(Top 80%)
20M20.00 mi1.36 mi4010-1383771-1213771-1215274(Top 20%)4749(Top 31%)4749(Top 90%)
21M21.00 mi1.00 mi4090-803836-653836-655152(Top 19%)4577(Top 30%)4577(Top 87%)
35K21.75 mi0.75 mi4118-283858-223858-224764(Top 18%)4300(Top 28%)4300(Top 81%)
23M23.00 mi1.25 mi4042+763788+703788+703369(Top 13%)3122(Top 21%)3122(Top 59%)
24M24.00 mi1.00 mi3966+763715+733715+732846(Top 11%)2647(Top 17%)2647(Top 50%)
40K24.85 mi0.85 mi3835+1313604+1113604+1112120(Top 8%)1984(Top 13%)1984(Top 38%)
25.2M25.20 mi0.35 mi3784+513557+473557+472352(Top 9%)2185(Top 14%)2185(Top 41%)
Finish26.22 mi1.02 mi3691+933468+893468+892540(Top 10%)2334(Top 15%)2334(Top 44%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 10%
×21stories
+97ft-345ft

Overall

2777

Males

2653

M18-39

2653

5K→10K

3.1 - 6.2 mi

Top 14%
×5stories
+79ft-138ft

Overall

3858

Males

3635

M18-39

3635

10K→15K

6.2 - 9.3 mi

Top 10%
×3stories
+67ft-78ft

Overall

2777

Males

2653

M18-39

2653

15K→20K

9.3 - 12.4 mi

Top 11%
×5stories
+106ft-86ft

Overall

2884

Males

2752

M18-39

2752

20K→Half

12.4 - 13.1 mi

Top 14%
×2stories
+19ft-37ft

Overall

3598

Males

3406

M18-39

3406

Half→25K

13.1 - 15.5 mi

Top 22%
×4stories
+66ft-88ft

Overall

5882

Males

5354

M18-39

5354

25K→30K

15.5 - 18.6 mi

Top 17%
×9stories
+181ft-148ft

Overall

4547

Males

4209

M18-39

4209

30K→20M

18.6 - 20.0 mi

Top 20%
×5stories
+64ft-50ft

Overall

5274

Males

4749

M18-39

4749

20M→21M

20.0 - 21.0 mi

Top 19%
×8stories
+106ft-24ft

Overall

5152

Males

4577

M18-39

4577

21M→35K

21.0 - 21.8 mi

Top 18%
×7stories
+17ft-86ft

Overall

4764

Males

4300

M18-39

4300

35K→23M

21.8 - 23.0 mi

Top 13%
×5stories
+23ft-63ft

Overall

3369

Males

3122

M18-39

3122

23M→24M

23.0 - 24.0 mi

Top 11%
×6stories
+12ft-82ft

Overall

2846

Males

2647

M18-39

2647

24M→40K

24.0 - 24.9 mi

Top 8%
×1story
+6ft-20ft

Overall

2120

Males

1984

M18-39

1984

40K→25.2M

24.9 - 25.2 mi

Top 9%
×1story
+13ft-16ft

Overall

2352

Males

2185

M18-39

2185

25.2M→Finish

25.2 - 26.2 mi

Top 10%
×2stories
+22ft-21ft

Overall

2540

Males

2334

M18-39

2334

Passing Analysis

Category:
Athletes Passed
1646
Passed By
1277
Net Change
+369
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4060
5K → 10K298163+135#4060#3925
10K → 15K4688+460#3925#3465
15K → 20K19017+173#3465#3292
20K → Half1729-12#3292#3304
Half → 25K17448-431#3304#3735
25K → 30K65202-137#3735#3872
30K → 20M28166-138#3872#4010
20M → 21M49129-80#4010#4090
21M → 35K2452-28#4090#4118
35K → 23M9923+76#4118#4042
23M → 24M9216+76#4042#3966
24M → 40K1365+131#3966#3835
40K → 25.2M532+51#3835#3784
25.2M → Finish11017+93#3784#3691
TOTALS16461277+369
📊

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