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BOSTON MARATHON 2023

Chris Seminowicz

Bib: 10483•M

NJ

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 24%
Gender (Male)
#0 / 15176
Top 38%
Masters (Masters Men)
#0 / 9891
Top 24%
Division (M45-49)
#0 / 2252
Top 31%
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
7:02/mi
21:51
↑ 97↓ 3451.5%
10K· 6.21 mi
6:54/mi
43:16
↑ 79↓ 1380.4%
15K· 9.32 mi
6:57/mi
1:04:51
↑ 67↓ 78
20K· 12.43 mi
7:05/mi
1:26:52
↑ 106↓ 860.1%
Half· 13.11 mi
7:12/mi
1:31:47
↑ 19↓ 370.5%
25K· 15.53 mi
7:16/mi
1:49:23
↑ 66↓ 880.2%
30K· 18.64 mi
7:28/mi
2:12:34
↑ 181↓ 1480.2%
20M
7:40/mi
2:22:59
↑ 64↓ 500.2%
21M
8:05/mi
2:31:04
↑ 106↓ 241.6%
35K· 21.75 mi
7:20/mi
2:36:33
↑ 17↓ 861.7%
23M
7:31/mi
2:45:58
↑ 23↓ 630.6%
24M
7:32/mi
2:53:30
↓ 821.3%
40K· 24.85 mi
7:30/mi
2:59:55
↓ 200.3%
25.2M
8:07/mi
3:02:43
↑ 13↓ 160.2%
Finish· 26.22 mi
7:28/mi
3:10:20
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:31:47
Pace7:00 /mi
2nd Half
Distance13.11 mi
Time1:38:33
Pace7:31 /mi
📊Positive Split: 7.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:1521:517:0221:51
7:02
-
10K
6.21 mi11:09:4043:166:5821:25
6:54
-0:08
15K
9.32 mi11:31:151:04:516:5721:35
6:57
+0:03
20K
12.43 mi11:53:161:26:526:5922:01
7:05
+0:08
Half
13.11 mi11:58:111:31:477:004:55
7:12
+0:07
25K
15.53 mi12:15:471:49:237:0217:36
7:16
+0:04
30K
18.64 mi12:38:582:12:347:0723:11
7:28
+0:12
20M
20.00 mi12:49:232:22:597:0910:25
7:40
+0:12
21M
21.00 mi12:57:282:31:047:128:05
8:05
+0:25
35K
21.75 mi13:02:572:36:337:125:29
7:20
-0:45
23M
23.00 mi13:12:222:45:587:139:25
7:31
+0:11
24M
24.00 mi13:19:542:53:307:147:32
7:32
+0:01
40K
24.85 mi13:26:192:59:557:146:25
7:30
-0:02
25.2M
25.20 mi13:29:073:02:437:152:48
8:07
+0:37
Finish
26.22 mi13:36:443:10:207:167:37
7:28
-0:39

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

6:54 /mi

Average Pace

7:16 /mi

Slowest Pace

8:07 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:49:02

89% of race

Time at Steady Pace

21:18

11% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:16 /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 mi10:48:1521:517:0221:51
7:02
#6451
10K
6.21 mi11:09:4043:166:5821:25
6:54
#6298
15K
9.32 mi11:31:151:04:516:5721:35
6:57
#6244
20K
12.43 mi11:53:161:26:526:5922:01
7:05
#6296
Half
13.11 mi11:58:111:31:477:004:55
7:12
#6374
25K
15.53 mi12:15:471:49:237:0217:36
7:16
#6451
30K
18.64 mi12:38:582:12:347:0723:11
7:28
#6464
20M
20.00 mi12:49:232:22:597:0910:25
7:40
#6506
21M
21.00 mi12:57:282:31:047:128:05
8:05
#6545
35K
21.75 mi13:02:572:36:337:125:29
7:20
#6536
23M
23.00 mi13:12:222:45:587:139:25
7:31
#6505
24M
24.00 mi13:19:542:53:307:147:32
7:32
#6512
40K
24.85 mi13:26:192:59:557:146:25
7:30
#6472
25.2M
25.20 mi13:29:073:02:437:152:48
8:07
#6447
Finish
26.22 mi13:36:443:10:207:167:37
7:28
#6496
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi6451584958496247(Top 23%)5657(Top 37%)5657(Top 251%)
10K6.21 mi3.10 mi6298+1535712+1375712+1376074(Top 23%)5521(Top 36%)5521(Top 245%)
15K9.32 mi3.11 mi6244+545668+445668+446247(Top 23%)5657(Top 37%)5657(Top 251%)
20K12.43 mi3.11 mi6296-525703-355703-356482(Top 24%)5827(Top 38%)5827(Top 259%)
Half13.11 mi0.68 mi6374-785760-575760-577834(Top 29%)6782(Top 45%)6782(Top 301%)
25K15.53 mi2.42 mi6451-775813-535813-536994(Top 26%)6148(Top 41%)6148(Top 273%)
30K18.64 mi3.11 mi6464-135815-25815-26962(Top 26%)6036(Top 40%)6036(Top 268%)
20M20.00 mi1.36 mi6506-425833-185833-187884(Top 30%)6510(Top 43%)6510(Top 289%)
21M21.00 mi1.00 mi6545-395848-155848-157859(Top 30%)6389(Top 42%)6389(Top 284%)
35K21.75 mi0.75 mi6536+95833+155833+157289(Top 27%)6062(Top 40%)6062(Top 269%)
23M23.00 mi1.25 mi6505+315796+375796+376527(Top 25%)5523(Top 36%)5523(Top 245%)
24M24.00 mi1.00 mi6512-75791+55791+57893(Top 30%)6241(Top 41%)6241(Top 277%)
40K24.85 mi0.85 mi6472+405751+405751+406729(Top 25%)5466(Top 36%)5466(Top 243%)
25.2M25.20 mi0.35 mi6447+255728+235728+237135(Top 27%)5649(Top 37%)5649(Top 251%)
Finish26.22 mi1.02 mi6496-495746-185746-188328(Top 31%)6344(Top 42%)6344(Top 282%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 23%
×21story building
+97ft-345ft

Overall

6247

Males

5657

M45-49

5657

5K→10K

3.1 - 6.2 mi

Top 23%
×5story building
+79ft-138ft

Overall

6074

Males

5521

M45-49

5521

10K→15K

6.2 - 9.3 mi

Top 23%
×3story building
+67ft-78ft

Overall

6247

Males

5657

M45-49

5657

15K→20K

9.3 - 12.4 mi

Top 24%
×5story building
+106ft-86ft

Overall

6482

Males

5827

M45-49

5827

20K→Half

12.4 - 13.1 mi

Top 29%
×2story building
+19ft-37ft

Overall

7834

Males

6782

M45-49

6782

Half→25K

13.1 - 15.5 mi

Top 26%
×4story building
+66ft-88ft

Overall

6994

Males

6148

M45-49

6148

25K→30K

15.5 - 18.6 mi

Top 26%
×9story building
+181ft-148ft

Overall

6962

Males

6036

M45-49

6036

30K→20M

18.6 - 20.0 mi

Top 30%
×5story building
+64ft-50ft

Overall

7884

Males

6510

M45-49

6510

20M→21M

20.0 - 21.0 mi

Top 30%
×8story building
+106ft-24ft

Overall

7859

Males

6389

M45-49

6389

21M→35K

21.0 - 21.8 mi

Top 27%
×7story building
+17ft-86ft

Overall

7289

Males

6062

M45-49

6062

35K→23M

21.8 - 23.0 mi

Top 25%
×5story building
+23ft-63ft

Overall

6527

Males

5523

M45-49

5523

23M→24M

23.0 - 24.0 mi

Top 30%
×6story building
+12ft-82ft

Overall

7893

Males

6241

M45-49

6241

24M→40K

24.0 - 24.9 mi

Top 25%
×1story
+6ft-20ft

Overall

6729

Males

5466

M45-49

5466

40K→25.2M

24.9 - 25.2 mi

Top 27%
×1story
+13ft-16ft

Overall

7135

Males

5649

M45-49

5649

25.2M→Finish

25.2 - 26.2 mi

Top 31%
×2story building
+22ft-21ft

Overall

8328

Males

6344

M45-49

6344

Passing Analysis

Category:
Athletes Passed
1073
Passed By
1118
Net Change
-45
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6451
5K → 10K282129+153#6451#6298
10K → 15K14086+54#6298#6244
15K → 20K78130-52#6244#6296
20K → Half280-78#6296#6374
Half → 25K56133-77#6374#6451
25K → 30K108121-13#6451#6464
30K → 20M5092-42#6464#6506
20M → 21M4685-39#6506#6545
21M → 35K4940+9#6545#6536
35K → 23M7847+31#6536#6505
23M → 24M4956-7#6505#6512
24M → 40K6626+40#6512#6472
40K → 25.2M3813+25#6472#6447
25.2M → Finish3180-49#6447#6496
TOTALS10731118-45
📊

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