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BOSTON MARATHON 2023

Sebastien Shao

Bib: 10359•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 22%
Gender (Male)
#0 / 15176
Top 35%
Masters (Masters Men)
#0 / 9891
Top 20%
Division (M45-49)
#0 / 2252
Top 26%
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
7:01/mi
21:47
↑ 97↓ 3451.5%
10K· 6.21 mi
6:43/mi
42:39
↑ 79↓ 1380.4%
15K· 9.32 mi
6:52/mi
1:03:58
↑ 67↓ 78
20K· 12.43 mi
7:02/mi
1:25:50
↑ 106↓ 860.1%
Half· 13.11 mi
7:05/mi
1:30:40
↑ 19↓ 370.5%
25K· 15.53 mi
7:09/mi
1:48:01
↑ 66↓ 880.2%
30K· 18.64 mi
7:24/mi
2:10:59
↑ 181↓ 1480.2%
20M
7:21/mi
2:20:58
↑ 64↓ 500.2%
21M
7:56/mi
2:28:54
↑ 106↓ 241.6%
35K· 21.75 mi
7:29/mi
2:34:30
↑ 17↓ 861.7%
23M
7:41/mi
2:44:07
↑ 23↓ 630.6%
24M
7:10/mi
2:51:17
↓ 821.3%
40K· 24.85 mi
7:16/mi
2:57:30
↓ 200.3%
25.2M
7:56/mi
3:00:14
↑ 13↓ 160.2%
Finish· 26.22 mi
7:11/mi
3:07:33
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:30:40
Pace6:55 /mi
2nd Half
Distance13.11 mi
Time1:36:53
Pace7:23 /mi
📊Positive Split: 6.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:2121:477:0121:47
7:01
-
10K
6.21 mi11:09:1342:396:5220:52
6:43
-0:18
15K
9.32 mi11:30:321:03:586:5221:19
6:52
+0:09
20K
12.43 mi11:52:241:25:506:5421:52
7:02
+0:10
Half
13.11 mi11:57:141:30:406:554:50
7:05
+0:03
25K
15.53 mi12:14:351:48:016:5717:21
7:09
+0:04
30K
18.64 mi12:37:332:10:597:0222:58
7:24
+0:15
20M
20.00 mi12:47:322:20:587:039:59
7:21
-0:03
21M
21.00 mi12:55:282:28:547:057:56
7:56
+0:35
35K
21.75 mi13:01:042:34:307:065:36
7:29
-0:27
23M
23.00 mi13:10:412:44:077:089:37
7:41
+0:12
24M
24.00 mi13:17:512:51:177:087:10
7:10
-0:31
40K
24.85 mi13:24:042:57:307:086:13
7:16
+0:06
25.2M
25.20 mi13:26:483:00:147:092:44
7:56
+0:40
Finish
26.22 mi13:34:073:07:337:107:19
7:11
-0:45

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

6:43 /mi

Average Pace

7:10 /mi

Slowest Pace

7:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:18:42

74% of race

Time at Steady Pace

38:11

20% of race

Time at Slower Pace

10:40

6% of race

Average Pace: 7:09 /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 mi10:48:2121:477:0121:47
7:01
#6306
10K
6.21 mi11:09:1342:396:5220:52
6:43
#5533
15K
9.32 mi11:30:321:03:586:5221:19
6:52
#5574
20K
12.43 mi11:52:241:25:506:5421:52
7:02
#5749
Half
13.11 mi11:57:141:30:406:554:50
7:05
#5816
25K
15.53 mi12:14:351:48:016:5717:21
7:09
#5927
30K
18.64 mi12:37:332:10:597:0222:58
7:24
#5981
20M
20.00 mi12:47:322:20:587:039:59
7:21
#5939
21M
21.00 mi12:55:282:28:547:057:56
7:56
#5930
35K
21.75 mi13:01:042:34:307:065:36
7:29
#5987
23M
23.00 mi13:10:412:44:077:089:37
7:41
#6022
24M
24.00 mi13:17:512:51:177:087:10
7:10
#5944
40K
24.85 mi13:24:042:57:307:086:13
7:16
#5877
25.2M
25.20 mi13:26:483:00:147:092:44
7:56
#5862
Finish
26.22 mi13:34:073:07:337:107:19
7:11
#5835
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi6306574257425665(Top 21%)5202(Top 34%)5202(Top 231%)
10K6.21 mi3.10 mi5533+7735104+6385104+6384516(Top 17%)4221(Top 28%)4221(Top 187%)
15K9.32 mi3.11 mi5574-415135-315135-315665(Top 21%)5202(Top 34%)5202(Top 231%)
20K12.43 mi3.11 mi5749-1755284-1495284-1496208(Top 23%)5629(Top 37%)5629(Top 250%)
Half13.11 mi0.68 mi5816-675337-535337-536997(Top 26%)6214(Top 41%)6214(Top 276%)
25K15.53 mi2.42 mi5927-1115422-855422-856407(Top 24%)5727(Top 38%)5727(Top 254%)
30K18.64 mi3.11 mi5981-545454-325454-326557(Top 25%)5770(Top 38%)5770(Top 256%)
20M20.00 mi1.36 mi5939+425408+465408+465886(Top 22%)5205(Top 34%)5205(Top 231%)
21M21.00 mi1.00 mi5930+95385+235385+236900(Top 26%)5796(Top 38%)5796(Top 257%)
35K21.75 mi0.75 mi5987-575421-365421-368372(Top 31%)6703(Top 44%)6703(Top 298%)
23M23.00 mi1.25 mi6022-355433-125433-127598(Top 29%)6174(Top 41%)6174(Top 274%)
24M24.00 mi1.00 mi5944+785364+695364+695548(Top 21%)4810(Top 32%)4810(Top 214%)
40K24.85 mi0.85 mi5877+675303+615303+615242(Top 20%)4503(Top 30%)4503(Top 200%)
25.2M25.20 mi0.35 mi5862+155288+155288+156026(Top 23%)4957(Top 33%)4957(Top 220%)
Finish26.22 mi1.02 mi5835+275255+335255+336265(Top 24%)5104(Top 34%)5104(Top 227%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 21%
×21story building
+97ft-345ft

Overall

5665

Males

5202

M45-49

5202

5K→10K

3.1 - 6.2 mi

Top 17%
×5story building
+79ft-138ft

Overall

4516

Males

4221

M45-49

4221

10K→15K

6.2 - 9.3 mi

Top 21%
×3story building
+67ft-78ft

Overall

5665

Males

5202

M45-49

5202

15K→20K

9.3 - 12.4 mi

Top 23%
×5story building
+106ft-86ft

Overall

6208

Males

5629

M45-49

5629

20K→Half

12.4 - 13.1 mi

Top 26%
×2story building
+19ft-37ft

Overall

6997

Males

6214

M45-49

6214

Half→25K

13.1 - 15.5 mi

Top 24%
×4story building
+66ft-88ft

Overall

6407

Males

5727

M45-49

5727

25K→30K

15.5 - 18.6 mi

Top 25%
×9story building
+181ft-148ft

Overall

6557

Males

5770

M45-49

5770

30K→20M

18.6 - 20.0 mi

Top 22%
×5story building
+64ft-50ft

Overall

5886

Males

5205

M45-49

5205

20M→21M

20.0 - 21.0 mi

Top 26%
×8story building
+106ft-24ft

Overall

6900

Males

5796

M45-49

5796

21M→35K

21.0 - 21.8 mi

Top 31%
×7story building
+17ft-86ft

Overall

8372

Males

6703

M45-49

6703

35K→23M

21.8 - 23.0 mi

Top 29%
×5story building
+23ft-63ft

Overall

7598

Males

6174

M45-49

6174

23M→24M

23.0 - 24.0 mi

Top 21%
×6story building
+12ft-82ft

Overall

5548

Males

4810

M45-49

4810

24M→40K

24.0 - 24.9 mi

Top 20%
×1story
+6ft-20ft

Overall

5242

Males

4503

M45-49

4503

40K→25.2M

24.9 - 25.2 mi

Top 23%
×1story
+13ft-16ft

Overall

6026

Males

4957

M45-49

4957

25.2M→Finish

25.2 - 26.2 mi

Top 24%
×2story building
+22ft-21ft

Overall

6265

Males

5104

M45-49

5104

Passing Analysis

Category:
Athletes Passed
1594
Passed By
1123
Net Change
+471
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6306
5K → 10K79017+773#6306#5533
10K → 15K102143-41#5533#5574
15K → 20K57232-175#5574#5749
20K → Half471-67#5749#5816
Half → 25K39150-111#5816#5927
25K → 30K112166-54#5927#5981
30K → 20M8139+42#5981#5939
20M → 21M6051+9#5939#5930
21M → 35K1976-57#5930#5987
35K → 23M5590-35#5987#6022
23M → 24M9315+78#6022#5944
24M → 40K8417+67#5944#5877
40K → 25.2M2611+15#5877#5862
25.2M → Finish7245+27#5862#5835
TOTALS15941123+471
📊

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