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BOSTON MARATHON 2023

Shaun Tamosaitis

Bib: 31665•M

CT

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M40-44)
#0 / 2241
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
8:36/mi
26:42
↑ 97↓ 3451.5%
10K· 6.21 mi
8:40/mi
53:38
↑ 79↓ 1380.4%
15K· 9.32 mi
9:12/mi
1:22:12
↑ 67↓ 78
20K· 12.43 mi
10:07/mi
1:53:38
↑ 106↓ 860.1%
Half· 13.11 mi
10:01/mi
2:00:28
↑ 19↓ 370.5%
25K· 15.53 mi
10:52/mi
2:26:49
↑ 66↓ 880.2%
30K· 18.64 mi
11:16/mi
3:01:50
↑ 181↓ 1480.2%
20M
11:41/mi
3:17:43
↑ 64↓ 500.2%
21M
12:06/mi
3:29:49
↑ 106↓ 241.6%
35K· 21.75 mi
9:35/mi
3:36:59
↑ 17↓ 861.7%
23M
10:43/mi
3:50:24
↑ 23↓ 630.6%
24M
10:16/mi
4:00:40
↓ 821.3%
40K· 24.85 mi
10:28/mi
4:09:37
↓ 200.3%
25.2M
11:30/mi
4:13:35
↑ 13↓ 160.2%
Finish· 26.22 mi
9:41/mi
4:23:27
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:00:28
Pace9:11 /mi
2nd Half
Distance13.11 mi
Time2:22:59
Pace10:54 /mi
📊Positive Split: 18.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:1426:428:3626:42
8:36
-
10K
6.21 mi12:13:1053:388:3826:56
8:40
+0:04
15K
9.32 mi12:41:441:22:128:4928:34
9:12
+0:32
20K
12.43 mi13:13:101:53:389:0931:26
10:07
+0:55
Half
13.11 mi13:20:002:00:289:116:50
10:01
-0:06
25K
15.53 mi13:46:212:26:499:2726:21
10:52
+0:51
30K
18.64 mi14:21:223:01:509:4535:01
11:16
+0:24
20M
20.00 mi14:37:153:17:439:5315:53
11:41
+0:25
21M
21.00 mi14:49:213:29:499:5912:06
12:06
+0:25
35K
21.75 mi14:56:313:36:599:597:10
9:35
-2:31
23M
23.00 mi15:09:563:50:2410:0113:25
10:43
+1:08
24M
24.00 mi15:20:124:00:4010:0210:16
10:16
-0:27
40K
24.85 mi15:29:094:09:3710:038:57
10:28
+0:12
25.2M
25.20 mi15:33:074:13:3510:043:58
11:30
+1:02
Finish
26.22 mi15:42:594:23:2710:039:52
9:41
-1:49

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

10:03 /mi

Slowest Pace

12:06 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:39:14

38% of race

Time at Steady Pace

1:10:54

27% of race

Time at Slower Pace

1:33:19

35% of race

Average Pace: 10:03 /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 mi11:46:1426:428:3626:42
8:36
#18187
10K
6.21 mi12:13:1053:388:3826:56
8:40
#18693
15K
9.32 mi12:41:441:22:128:4928:34
9:12
#19700
20K
12.43 mi13:13:101:53:389:0931:26
10:07
#20964
Half
13.11 mi13:20:002:00:289:116:50
10:01
#21147
25K
15.53 mi13:46:212:26:499:2726:21
10:52
#21729
30K
18.64 mi14:21:223:01:509:4535:01
11:16
#22226
20M
20.00 mi14:37:153:17:439:5315:53
11:41
#22374
21M
21.00 mi14:49:213:29:499:5912:06
12:06
#22398
35K
21.75 mi14:56:313:36:599:597:10
9:35
#22320
23M
23.00 mi15:09:563:50:2410:0113:25
10:43
#22291
24M
24.00 mi15:20:124:00:4010:0210:16
10:16
#22257
40K
24.85 mi15:29:094:09:3710:038:57
10:28
#22220
25.2M
25.20 mi15:33:074:13:3510:043:58
11:30
#22207
Finish
26.22 mi15:42:594:23:2710:039:52
9:41
#22145
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi18187114971149721287(Top 80%)12873(Top 85%)12873(Top 574%)
10K6.21 mi3.10 mi18693-50611732-23511732-23519240(Top 72%)11997(Top 79%)11997(Top 535%)
15K9.32 mi3.11 mi19700-100712111-37912111-37921287(Top 80%)12873(Top 85%)12873(Top 574%)
20K12.43 mi3.11 mi20964-126412693-58212693-58223138(Top 87%)13694(Top 90%)13694(Top 611%)
Half13.11 mi0.68 mi21147-18312781-8812781-8823283(Top 87%)13750(Top 91%)13750(Top 614%)
25K15.53 mi2.42 mi21729-58213039-25813039-25823768(Top 89%)13914(Top 92%)13914(Top 621%)
30K18.64 mi3.11 mi22226-49713243-20413243-20423526(Top 88%)13755(Top 91%)13755(Top 614%)
20M20.00 mi1.36 mi22374-14813298-5513298-5523798(Top 89%)13813(Top 91%)13813(Top 616%)
21M21.00 mi1.00 mi22398-2413290+813290+822900(Top 86%)13381(Top 88%)13381(Top 597%)
35K21.75 mi0.75 mi22320+7813249+4113249+4120091(Top 75%)12092(Top 80%)12092(Top 540%)
23M23.00 mi1.25 mi22291+2913235+1413235+1421787(Top 82%)12806(Top 84%)12806(Top 571%)
24M24.00 mi1.00 mi22257+3413212+2313212+2321474(Top 81%)12622(Top 83%)12622(Top 563%)
40K24.85 mi0.85 mi22220+3713189+2313189+2321129(Top 79%)12425(Top 82%)12425(Top 554%)
25.2M25.20 mi0.35 mi22207+1313182+713182+721560(Top 81%)12651(Top 83%)12651(Top 565%)
Finish26.22 mi1.02 mi22145+6213139+4313139+4320730(Top 78%)12288(Top 81%)12288(Top 548%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 80%
×21story building
+97ft-345ft

Overall

21287

Males

12873

M40-44

12873

5K→10K

3.1 - 6.2 mi

Top 72%
×5story building
+79ft-138ft

Overall

19240

Males

11997

M40-44

11997

10K→15K

6.2 - 9.3 mi

Top 80%
×3story building
+67ft-78ft

Overall

21287

Males

12873

M40-44

12873

15K→20K

9.3 - 12.4 mi

Top 87%
×5story building
+106ft-86ft

Overall

23138

Males

13694

M40-44

13694

20K→Half

12.4 - 13.1 mi

Top 87%
×2story building
+19ft-37ft

Overall

23283

Males

13750

M40-44

13750

Half→25K

13.1 - 15.5 mi

Top 89%
×4story building
+66ft-88ft

Overall

23768

Males

13914

M40-44

13914

25K→30K

15.5 - 18.6 mi

Top 88%
×9story building
+181ft-148ft

Overall

23526

Males

13755

M40-44

13755

30K→20M

18.6 - 20.0 mi

Top 89%
×5story building
+64ft-50ft

Overall

23798

Males

13813

M40-44

13813

20M→21M

20.0 - 21.0 mi

Top 86%
×8story building
+106ft-24ft

Overall

22900

Males

13381

M40-44

13381

21M→35K

21.0 - 21.8 mi

Top 75%
×7story building
+17ft-86ft

Overall

20091

Males

12092

M40-44

12092

35K→23M

21.8 - 23.0 mi

Top 82%
×5story building
+23ft-63ft

Overall

21787

Males

12806

M40-44

12806

23M→24M

23.0 - 24.0 mi

Top 81%
×6story building
+12ft-82ft

Overall

21474

Males

12622

M40-44

12622

24M→40K

24.0 - 24.9 mi

Top 79%
×1story
+6ft-20ft

Overall

21129

Males

12425

M40-44

12425

40K→25.2M

24.9 - 25.2 mi

Top 81%
×1story
+13ft-16ft

Overall

21560

Males

12651

M40-44

12651

25.2M→Finish

25.2 - 26.2 mi

Top 78%
×2story building
+22ft-21ft

Overall

20730

Males

12288

M40-44

12288

Passing Analysis

Category:
Athletes Passed
650
Passed By
4608
Net Change
-3958
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18187
5K → 10K130636-506#18187#18693
10K → 15K191026-1007#18693#19700
15K → 20K151279-1264#19700#20964
20K → Half4187-183#20964#21147
Half → 25K13595-582#21147#21729
25K → 30K34531-497#21729#22226
30K → 20M25173-148#22226#22374
20M → 21M4771-24#22374#22398
21M → 35K824+78#22398#22320
35K → 23M7142+29#22320#22291
23M → 24M5723+34#22291#22257
24M → 40K5619+37#22257#22220
40K → 25.2M2411+13#22220#22207
25.2M → Finish7311+62#22207#22145
TOTALS6504608-3958
📊

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