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BOSTON MARATHON 2023

Louis Szura

Bib: 11143•M

MI

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 42%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 46%
Division (M45-49)
#0 / 2252
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:35/mi
23:34
↑ 97↓ 3451.5%
10K· 6.21 mi
7:28/mi
46:45
↑ 79↓ 1380.4%
15K· 9.32 mi
7:30/mi
1:10:02
↑ 67↓ 78
20K· 12.43 mi
7:35/mi
1:33:36
↑ 106↓ 860.1%
Half· 13.11 mi
7:21/mi
1:38:37
↑ 19↓ 370.5%
25K· 15.53 mi
7:32/mi
1:56:53
↑ 66↓ 880.2%
30K· 18.64 mi
7:39/mi
2:20:38
↑ 181↓ 1480.2%
20M
7:37/mi
2:30:59
↑ 64↓ 500.2%
21M
8:47/mi
2:39:46
↑ 106↓ 241.6%
35K· 21.75 mi
7:38/mi
2:45:29
↑ 17↓ 861.7%
23M
8:57/mi
2:56:41
↑ 23↓ 630.6%
24M
8:50/mi
3:05:31
↓ 821.3%
40K· 24.85 mi
9:25/mi
3:13:34
↓ 200.3%
25.2M
10:29/mi
3:17:11
↑ 13↓ 160.2%
Finish· 26.22 mi
9:00/mi
3:26:21
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:37
Pace7:31 /mi
2nd Half
Distance13.11 mi
Time1:47:44
Pace8:13 /mi
📊Positive Split: 9.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:2523:347:3523:34
7:35
-
10K
6.21 mi11:13:3646:457:3123:11
7:28
-0:07
15K
9.32 mi11:36:531:10:027:3123:17
7:30
+0:02
20K
12.43 mi12:00:271:33:367:3223:34
7:35
+0:05
Half
13.11 mi12:05:281:38:377:315:01
7:21
-0:14
25K
15.53 mi12:23:441:56:537:3118:16
7:32
+0:11
30K
18.64 mi12:47:292:20:387:3323:45
7:39
+0:07
20M
20.00 mi12:57:502:30:597:3310:21
7:37
-0:02
21M
21.00 mi13:06:372:39:467:368:47
8:47
+1:10
35K
21.75 mi13:12:202:45:297:375:43
7:38
-1:09
23M
23.00 mi13:23:322:56:417:4111:12
8:57
+1:19
24M
24.00 mi13:32:223:05:317:448:50
8:50
-0:07
40K
24.85 mi13:40:253:13:347:478:03
9:25
+0:35
25.2M
25.20 mi13:44:023:17:117:493:37
10:29
+1:04
Finish
26.22 mi13:53:123:26:217:539:10
9:00
-1:29

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

7:21 /mi

Average Pace

7:53 /mi

Slowest Pace

10:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:36:42

76% of race

Time at Slower Pace

49:39

24% of race

Average Pace: 7:52 /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 mi10:50:2523:347:3523:34
7:35
#10388
10K
6.21 mi11:13:3646:457:3123:11
7:28
#10253
15K
9.32 mi11:36:531:10:027:3123:17
7:30
#10186
20K
12.43 mi12:00:271:33:367:3223:34
7:35
#10101
Half
13.11 mi12:05:281:38:377:315:01
7:21
#10030
25K
15.53 mi12:23:441:56:537:3118:16
7:32
#9845
30K
18.64 mi12:47:292:20:387:3323:45
7:39
#9534
20M
20.00 mi12:57:502:30:597:3310:21
7:37
#9354
21M
21.00 mi13:06:372:39:467:368:47
8:47
#9495
35K
21.75 mi13:12:202:45:297:375:43
7:38
#9478
23M
23.00 mi13:23:322:56:417:4111:12
8:57
#9863
24M
24.00 mi13:32:223:05:317:448:50
8:50
#10171
40K
24.85 mi13:40:253:13:347:478:03
9:25
#10537
25.2M
25.20 mi13:44:023:17:117:493:37
10:29
#10721
Finish
26.22 mi13:53:123:26:217:539:10
9:00
#11071
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi103888347834710123(Top 38%)8210(Top 54%)8210(Top 365%)
10K6.21 mi3.10 mi10253+1358289+588289+5810160(Top 38%)8255(Top 54%)8255(Top 367%)
15K9.32 mi3.11 mi10186+678270+198270+1910123(Top 38%)8210(Top 54%)8210(Top 365%)
20K12.43 mi3.11 mi10101+858208+628208+629974(Top 37%)8061(Top 53%)8061(Top 358%)
Half13.11 mi0.68 mi10030+718167+418167+419032(Top 34%)7548(Top 50%)7548(Top 335%)
25K15.53 mi2.42 mi9845+1858047+1208047+1209031(Top 34%)7460(Top 49%)7460(Top 331%)
30K18.64 mi3.11 mi9534+3117825+2227825+2228264(Top 31%)6848(Top 45%)6848(Top 304%)
20M20.00 mi1.36 mi9354+1807687+1387687+1387605(Top 29%)6350(Top 42%)6350(Top 282%)
21M21.00 mi1.00 mi9495-1417753-667753-6612134(Top 46%)8639(Top 57%)8639(Top 384%)
35K21.75 mi0.75 mi9478+177727+267727+269550(Top 36%)7387(Top 49%)7387(Top 328%)
23M23.00 mi1.25 mi9863-3857920-1937920-19315743(Top 59%)10117(Top 67%)10117(Top 449%)
24M24.00 mi1.00 mi10171-3088049-1298049-12916355(Top 61%)10324(Top 68%)10324(Top 458%)
40K24.85 mi0.85 mi10537-3668193-1448193-14417986(Top 68%)11014(Top 73%)11014(Top 489%)
25.2M25.20 mi0.35 mi10721-1848283-908283-9018989(Top 71%)11445(Top 75%)11445(Top 508%)
Finish26.22 mi1.02 mi11071-3508433-1508433-15017929(Top 67%)11025(Top 73%)11025(Top 490%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 38%
×21story building
+97ft-345ft

Overall

10123

Males

8210

M45-49

8210

5K→10K

3.1 - 6.2 mi

Top 38%
×5story building
+79ft-138ft

Overall

10160

Males

8255

M45-49

8255

10K→15K

6.2 - 9.3 mi

Top 38%
×3story building
+67ft-78ft

Overall

10123

Males

8210

M45-49

8210

15K→20K

9.3 - 12.4 mi

Top 37%
×5story building
+106ft-86ft

Overall

9974

Males

8061

M45-49

8061

20K→Half

12.4 - 13.1 mi

Top 34%
×2story building
+19ft-37ft

Overall

9032

Males

7548

M45-49

7548

Half→25K

13.1 - 15.5 mi

Top 34%
×4story building
+66ft-88ft

Overall

9031

Males

7460

M45-49

7460

25K→30K

15.5 - 18.6 mi

Top 31%
×9story building
+181ft-148ft

Overall

8264

Males

6848

M45-49

6848

30K→20M

18.6 - 20.0 mi

Top 29%
×5story building
+64ft-50ft

Overall

7605

Males

6350

M45-49

6350

20M→21M

20.0 - 21.0 mi

Top 46%
×8story building
+106ft-24ft

Overall

12134

Males

8639

M45-49

8639

21M→35K

21.0 - 21.8 mi

Top 36%
×7story building
+17ft-86ft

Overall

9550

Males

7387

M45-49

7387

35K→23M

21.8 - 23.0 mi

Top 59%
×5story building
+23ft-63ft

Overall

15743

Males

10117

M45-49

10117

23M→24M

23.0 - 24.0 mi

Top 61%
×6story building
+12ft-82ft

Overall

16355

Males

10324

M45-49

10324

24M→40K

24.0 - 24.9 mi

Top 68%
×1story
+6ft-20ft

Overall

17986

Males

11014

M45-49

11014

40K→25.2M

24.9 - 25.2 mi

Top 71%
×1story
+13ft-16ft

Overall

18989

Males

11445

M45-49

11445

25.2M→Finish

25.2 - 26.2 mi

Top 67%
×2story building
+22ft-21ft

Overall

17929

Males

11025

M45-49

11025

Passing Analysis

Category:
Athletes Passed
1796*
Passed By
2477
Net Change
-683
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10388
5K → 10K374*239+135#10388#10253
10K → 15K209142+67#10253#10186
15K → 20K199*114+85#10186#10101
20K → Half78*7+71#10101#10030
Half → 25K215*30+185#10030#9845
25K → 30K347*36+311#9845#9534
30K → 20M19010+180#9534#9354
20M → 21M52193-141#9354#9495
21M → 35K5942+17#9495#9478
35K → 23M20405-385#9478#9863
23M → 24M20326-308#9863#10171
24M → 40K16382-366#10171#10537
40K → 25.2M7191-184#10537#10721
25.2M → Finish10360-350#10721#11071
TOTALS1796*2477-683

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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