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BOSTON MARATHON 2023

Mark Schiefsky

Bib: 25107•M

DC

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M50-54)
#0 / 2052
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
8:49/mi
27:25
↑ 97↓ 3451.5%
10K· 6.21 mi
8:47/mi
54:42
↑ 79↓ 1380.4%
15K· 9.32 mi
8:48/mi
1:22:03
↑ 67↓ 78
20K· 12.43 mi
8:41/mi
1:49:01
↑ 106↓ 860.1%
Half· 13.11 mi
8:36/mi
1:54:53
↑ 19↓ 370.5%
25K· 15.53 mi
8:48/mi
2:16:13
↑ 66↓ 880.2%
30K· 18.64 mi
9:00/mi
2:44:11
↑ 181↓ 1480.2%
20M
9:10/mi
2:56:38
↑ 64↓ 500.2%
21M
9:27/mi
3:06:05
↑ 106↓ 241.6%
35K· 21.75 mi
9:05/mi
3:12:53
↑ 17↓ 861.7%
23M
9:12/mi
3:24:24
↑ 23↓ 630.6%
24M
8:56/mi
3:33:20
↓ 821.3%
40K· 24.85 mi
9:07/mi
3:41:08
↓ 200.3%
25.2M
10:18/mi
3:44:41
↑ 13↓ 160.2%
Finish· 26.22 mi
9:02/mi
3:53:53
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:54:53
Pace8:46 /mi
2nd Half
Distance13.11 mi
Time1:59:00
Pace9:05 /mi
📊Positive Split: 3.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:42:5627:258:4927:25
8:49
-
10K
6.21 mi12:10:1354:428:4827:17
8:47
-0:02
15K
9.32 mi12:37:341:22:038:4827:21
8:48
+0:01
20K
12.43 mi13:04:321:49:018:4626:58
8:41
-0:07
Half
13.11 mi13:10:241:54:538:465:52
8:36
-0:05
25K
15.53 mi13:31:442:16:138:4621:20
8:48
+0:12
30K
18.64 mi13:59:422:44:118:4827:58
9:00
+0:12
20M
20.00 mi14:12:092:56:388:5012:27
9:10
+0:10
21M
21.00 mi14:21:363:06:058:529:27
9:27
+0:17
35K
21.75 mi14:28:243:12:538:526:48
9:05
-0:22
23M
23.00 mi14:39:553:24:248:5311:31
9:12
+0:07
24M
24.00 mi14:48:513:33:208:538:56
8:56
-0:16
40K
24.85 mi14:56:393:41:088:547:48
9:07
+0:11
25.2M
25.20 mi15:00:123:44:418:553:33
10:18
+1:11
Finish
26.22 mi15:09:243:53:538:569:12
9:02
-1:16

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

8:36 /mi

Average Pace

8:56 /mi

Slowest Pace

10:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:50:20

98% of race

Time at Steady Pace

0:00

0% of race

Time at Slower Pace

3:33

2% of race

Average Pace: 8:55 /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 mi11:42:5627:258:4927:25
8:49
#19588
10K
6.21 mi12:10:1354:428:4827:17
8:47
#19690
15K
9.32 mi12:37:341:22:038:4827:21
8:48
#19617
20K
12.43 mi13:04:321:49:018:4626:58
8:41
#19185
Half
13.11 mi13:10:241:54:538:465:52
8:36
#19136
25K
15.53 mi13:31:442:16:138:4621:20
8:48
#18938
30K
18.64 mi13:59:422:44:118:4827:58
9:00
#18629
20M
20.00 mi14:12:092:56:388:5012:27
9:10
#18506
21M
21.00 mi14:21:363:06:058:529:27
9:27
#18341
35K
21.75 mi14:28:243:12:538:526:48
9:05
#18329
23M
23.00 mi14:39:553:24:248:5311:31
9:12
#18239
24M
24.00 mi14:48:513:33:208:538:56
8:56
#18184
40K
24.85 mi14:56:393:41:088:547:48
9:07
#18137
25.2M
25.20 mi15:00:123:44:418:553:33
10:18
#18153
Finish
26.22 mi15:09:243:53:538:569:12
9:02
#18149
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi19588119971199719517(Top 73%)12095(Top 80%)12095(Top 589%)
10K6.21 mi3.10 mi19690-10212088-9112088-9119830(Top 74%)12211(Top 80%)12211(Top 595%)
15K9.32 mi3.11 mi19617+7312072+1612072+1619517(Top 73%)12095(Top 80%)12095(Top 589%)
20K12.43 mi3.11 mi19185+43211938+13411938+13417987(Top 68%)11466(Top 76%)11466(Top 559%)
Half13.11 mi0.68 mi19136+4911917+2111917+2118293(Top 69%)11612(Top 77%)11612(Top 566%)
25K15.53 mi2.42 mi18938+19811831+8611831+8617931(Top 67%)11387(Top 75%)11387(Top 555%)
30K18.64 mi3.11 mi18629+30911673+15811673+15817174(Top 65%)10979(Top 72%)10979(Top 535%)
20M20.00 mi1.36 mi18506+12311613+6011613+6017359(Top 65%)10974(Top 72%)10974(Top 535%)
21M21.00 mi1.00 mi18341+16511528+8511528+8515722(Top 59%)10240(Top 67%)10240(Top 499%)
35K21.75 mi0.75 mi18329+1211513+1511513+1518248(Top 69%)11250(Top 74%)11250(Top 548%)
23M23.00 mi1.25 mi18239+9011468+4511468+4517038(Top 64%)10712(Top 71%)10712(Top 522%)
24M24.00 mi1.00 mi18184+5511430+3811430+3816914(Top 64%)10591(Top 70%)10591(Top 516%)
40K24.85 mi0.85 mi18137+4711398+3211398+3216714(Top 63%)10452(Top 69%)10452(Top 509%)
25.2M25.20 mi0.35 mi18153-1611400-211400-218425(Top 69%)11217(Top 74%)11217(Top 547%)
Finish26.22 mi1.02 mi18149+411393+711393+718098(Top 68%)11127(Top 73%)11127(Top 542%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 73%
×21story building
+97ft-345ft

Overall

19517

Males

12095

M50-54

12095

5K→10K

3.1 - 6.2 mi

Top 74%
×5story building
+79ft-138ft

Overall

19830

Males

12211

M50-54

12211

10K→15K

6.2 - 9.3 mi

Top 73%
×3story building
+67ft-78ft

Overall

19517

Males

12095

M50-54

12095

15K→20K

9.3 - 12.4 mi

Top 68%
×5story building
+106ft-86ft

Overall

17987

Males

11466

M50-54

11466

20K→Half

12.4 - 13.1 mi

Top 69%
×2story building
+19ft-37ft

Overall

18293

Males

11612

M50-54

11612

Half→25K

13.1 - 15.5 mi

Top 67%
×4story building
+66ft-88ft

Overall

17931

Males

11387

M50-54

11387

25K→30K

15.5 - 18.6 mi

Top 65%
×9story building
+181ft-148ft

Overall

17174

Males

10979

M50-54

10979

30K→20M

18.6 - 20.0 mi

Top 65%
×5story building
+64ft-50ft

Overall

17359

Males

10974

M50-54

10974

20M→21M

20.0 - 21.0 mi

Top 59%
×8story building
+106ft-24ft

Overall

15722

Males

10240

M50-54

10240

21M→35K

21.0 - 21.8 mi

Top 69%
×7story building
+17ft-86ft

Overall

18248

Males

11250

M50-54

11250

35K→23M

21.8 - 23.0 mi

Top 64%
×5story building
+23ft-63ft

Overall

17038

Males

10712

M50-54

10712

23M→24M

23.0 - 24.0 mi

Top 64%
×6story building
+12ft-82ft

Overall

16914

Males

10591

M50-54

10591

24M→40K

24.0 - 24.9 mi

Top 63%
×1story
+6ft-20ft

Overall

16714

Males

10452

M50-54

10452

40K→25.2M

24.9 - 25.2 mi

Top 69%
×1story
+13ft-16ft

Overall

18425

Males

11217

M50-54

11217

25.2M→Finish

25.2 - 26.2 mi

Top 68%
×2story building
+22ft-21ft

Overall

18098

Males

11127

M50-54

11127

Passing Analysis

Category:
Athletes Passed
2287
Passed By
848
Net Change
+1439
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19588
5K → 10K259361-102#19588#19690
10K → 15K221148+73#19690#19617
15K → 20K45321+432#19617#19185
20K → Half556+49#19185#19136
Half → 25K22224+198#19136#18938
25K → 30K34940+309#18938#18629
30K → 20M15431+123#18629#18506
20M → 21M18217+165#18506#18341
21M → 35K4634+12#18341#18329
35K → 23M12939+90#18329#18239
23M → 24M7621+55#18239#18184
24M → 40K6821+47#18184#18137
40K → 25.2M1632-16#18137#18153
25.2M → Finish5753+4#18153#18149
TOTALS2287848+1439
📊

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