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BOSTON MARATHON 2023

Derek Brozowski

Bib: 29846•M

MA

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
31:32
Rank: #23800
Start → 5K
10:09/mi
31:32 split
10K· 6.21 mi
1:01:01
Rank: #23205 (+595)
5K → 10K
9:29/mi
29:29 split
15K· 9.32 mi
1:28:40
Rank: #22358 (+847)
10K → 15K
8:54/mi
27:39 split
20K· 12.43 mi
1:57:09
Rank: #21880 (+478)
15K → 20K
9:10/mi
28:29 split
Half· 13.11 mi
2:02:56
Rank: #21745 (+135)
20K → Half
8:29/mi
5:47 split
25K· 15.53 mi
2:24:46
Rank: #21341 (+404)
Half → 25K
9:00/mi
21:50 split
30K· 18.64 mi
2:53:02
Rank: #20763 (+578)
25K → 30K
9:06/mi
28:16 split
20M
3:05:41
Rank: #20562 (+201)
30K → 20M
9:19/mi
12:39 split
21M
3:15:12
Rank: #20317 (+245)
20M → 21M
9:31/mi
9:31 split
35K· 21.75 mi
3:21:49
Rank: #20218 (+99)
21M → 35K
8:51/mi
6:37 split
23M
3:33:12
Rank: #20015 (+203)
35K → 23M
9:05/mi
11:23 split
24M
3:42:32
Rank: #19964 (+51)
23M → 24M
9:20/mi
9:20 split
40K· 24.85 mi
3:50:49
Rank: #19928 (+36)
24M → 40K
9:41/mi
8:17 split
25.2M
3:54:21
Rank: #19905 (+23)
40K → 25.2M
10:15/mi
3:32 split
Finish· 26.22 mi
4:04:14
Rank: #19936 (-31)
25.2M → Finish
9:42/mi
9:53 split

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time2:02:56
Pace9:23 /mi
2nd Half✓ Faster
Distance13.11 mi
Time2:01:18
Pace9:15 /mi
📊Negative Split: 1.3% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:3031:3210:0931:32
10:09
-
10K
6.21 mi12:20:591:01:019:4929:29
9:29
-0:40
15K
9.32 mi12:48:381:28:409:3127:39
8:54
-0:35
20K
12.43 mi13:17:071:57:099:2628:29
9:10
+0:16
Half
13.11 mi13:22:542:02:569:235:47
8:29
-0:41
25K
15.53 mi13:44:442:24:469:1921:50
9:00
+0:31
30K
18.64 mi14:13:002:53:029:1728:16
9:06
+0:06
20M
20.00 mi14:25:393:05:419:1712:39
9:19
+0:13
21M
21.00 mi14:35:103:15:129:189:31
9:31
+0:12
35K
21.75 mi14:41:473:21:499:176:37
8:51
-0:40
23M
23.00 mi14:53:103:33:129:1611:23
9:05
+0:14
24M
24.00 mi15:02:303:42:329:169:20
9:20
+0:15
40K
24.85 mi15:10:473:50:499:178:17
9:41
+0:21
25.2M
25.20 mi15:14:193:54:219:183:32
10:15
+0:34
Finish
26.22 mi15:24:124:04:149:199:53
9:42
-0:33

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

8:29 /mi

Average Pace

9:19 /mi

Slowest Pace

10:15 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:13:16

30% of race

Time at Steady Pace

1:57:44

48% of race

Time at Slower Pace

53:14

22% of race

Average Pace: 9:19 /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 mi11:51:3031:3210:0931:32
10:09
#23800
10K
6.21 mi12:20:591:01:019:4929:29
9:29
#23205
15K
9.32 mi12:48:381:28:409:3127:39
8:54
#22358
20K
12.43 mi13:17:071:57:099:2628:29
9:10
#21880
Half
13.11 mi13:22:542:02:569:235:47
8:29
#21745
25K
15.53 mi13:44:442:24:469:1921:50
9:00
#21341
30K
18.64 mi14:13:002:53:029:1728:16
9:06
#20763
20M
20.00 mi14:25:393:05:419:1712:39
9:19
#20562
21M
21.00 mi14:35:103:15:129:189:31
9:31
#20317
35K
21.75 mi14:41:473:21:499:176:37
8:51
#20218
23M
23.00 mi14:53:103:33:129:1611:23
9:05
#20015
24M
24.00 mi15:02:303:42:329:169:20
9:20
#19964
40K
24.85 mi15:10:473:50:499:178:17
9:41
#19928
25.2M
25.20 mi15:14:193:54:219:183:32
10:15
#19905
Finish
26.22 mi15:24:124:04:149:199:53
9:42
#19936
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi23800139861398620037(Top 75%)12313(Top 81%)12313(Top 233%)
10K6.21 mi3.10 mi23205+59513710+27613710+27622480(Top 84%)13380(Top 88%)13380(Top 253%)
15K9.32 mi3.11 mi22358+84713314+39613314+39620037(Top 75%)12313(Top 81%)12313(Top 233%)
20K12.43 mi3.11 mi21880+47813096+21813096+21820431(Top 77%)12488(Top 82%)12488(Top 236%)
Half13.11 mi0.68 mi21745+13513044+5213044+5217576(Top 66%)11337(Top 75%)11337(Top 215%)
25K15.53 mi2.42 mi21341+40412866+17812866+17818975(Top 71%)11841(Top 78%)11841(Top 224%)
30K18.64 mi3.11 mi20763+57812603+26312603+26317678(Top 66%)11207(Top 74%)11207(Top 212%)
20M20.00 mi1.36 mi20562+20112486+11712486+11718060(Top 68%)11272(Top 74%)11272(Top 213%)
21M21.00 mi1.00 mi20317+24512367+11912367+11916029(Top 60%)10372(Top 68%)10372(Top 196%)
35K21.75 mi0.75 mi20218+9912313+5412313+5417175(Top 65%)10794(Top 71%)10794(Top 204%)
23M23.00 mi1.25 mi20015+20312218+9512218+9516496(Top 62%)10462(Top 69%)10462(Top 198%)
24M24.00 mi1.00 mi19964+5112192+2612192+2618595(Top 70%)11356(Top 75%)11356(Top 215%)
40K24.85 mi0.85 mi19928+3612166+2612166+2618976(Top 71%)11476(Top 76%)11476(Top 217%)
25.2M25.20 mi0.35 mi19905+2312158+812158+818262(Top 69%)11157(Top 74%)11157(Top 211%)
Finish26.22 mi1.02 mi19936-3112162-412162-420773(Top 78%)12302(Top 81%)12302(Top 233%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 75%
×21story building
+97ft-345ft

Overall

20037

Males

12313

M18-39

12313

5K→10K

3.1 - 6.2 mi

Top 84%
×5story building
+79ft-138ft

Overall

22480

Males

13380

M18-39

13380

10K→15K

6.2 - 9.3 mi

Top 75%
×3story building
+67ft-78ft

Overall

20037

Males

12313

M18-39

12313

15K→20K

9.3 - 12.4 mi

Top 77%
×5story building
+106ft-86ft

Overall

20431

Males

12488

M18-39

12488

20K→Half

12.4 - 13.1 mi

Top 66%
×2story building
+19ft-37ft

Overall

17576

Males

11337

M18-39

11337

Half→25K

13.1 - 15.5 mi

Top 71%
×4story building
+66ft-88ft

Overall

18975

Males

11841

M18-39

11841

25K→30K

15.5 - 18.6 mi

Top 66%
×9story building
+181ft-148ft

Overall

17678

Males

11207

M18-39

11207

30K→20M

18.6 - 20.0 mi

Top 68%
×5story building
+64ft-50ft

Overall

18060

Males

11272

M18-39

11272

20M→21M

20.0 - 21.0 mi

Top 60%
×8story building
+106ft-24ft

Overall

16029

Males

10372

M18-39

10372

21M→35K

21.0 - 21.8 mi

Top 65%
×7story building
+17ft-86ft

Overall

17175

Males

10794

M18-39

10794

35K→23M

21.8 - 23.0 mi

Top 62%
×5story building
+23ft-63ft

Overall

16496

Males

10462

M18-39

10462

23M→24M

23.0 - 24.0 mi

Top 70%
×6story building
+12ft-82ft

Overall

18595

Males

11356

M18-39

11356

24M→40K

24.0 - 24.9 mi

Top 71%
×1story
+6ft-20ft

Overall

18976

Males

11476

M18-39

11476

40K→25.2M

24.9 - 25.2 mi

Top 69%
×1story
+13ft-16ft

Overall

18262

Males

11157

M18-39

11157

25.2M→Finish

25.2 - 26.2 mi

Top 78%
×2story building
+22ft-21ft

Overall

20773

Males

12302

M18-39

12302

Passing Analysis

Category:
Athletes Passed
4073
Passed By
209
Net Change
+3864
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23800
5K → 10K63439+595#23800#23205
10K → 15K8503+847#23205#22358
15K → 20K4813+478#22358#21880
20K → Half1383+135#21880#21745
Half → 25K4051+404#21745#21341
25K → 30K5824+578#21341#20763
30K → 20M2043+201#20763#20562
20M → 21M2483+245#20562#20317
21M → 35K990+99#20317#20218
35K → 23M2129+203#20218#20015
23M → 24M8635+51#20015#19964
24M → 40K6630+36#19964#19928
40K → 25.2M3411+23#19928#19905
25.2M → Finish3465-31#19905#19936
TOTALS4073209+3864
📊

Passing Visuals

Category:
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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