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BOSTON MARATHON 2023

Sin On So

Bib: 19553 M HK

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 43%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 48%
Division (M55-59)
#0 / 1422
Top 32%
Race Day Weather
49°/39°F
light intensity drizzle

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
8:01/mi
24:53
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:46/mi
49:00
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:49/mi
1:13:18
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:58/mi
1:38:02
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
8:01/mi
1:43:30
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
8:02/mi
2:02:59
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
8:08/mi
2:28:14
↑ 181↓ 1480.2%
138 ft elev
20M
8:09/mi
2:39:19
↑ 64↓ 500.2%
148 ft elev
21M
8:06/mi
2:47:25
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
7:33/mi
2:53:04
↑ 17↓ 861.7%
156 ft elev
23M
7:52/mi
3:02:55
↑ 23↓ 630.6%
116 ft elev
24M
7:42/mi
3:10:37
↓ 821.3%
34 ft elev
40K· 24.85 mi
7:50/mi
3:17:19
↓ 200.3%
20 ft elev
25.2M
8:13/mi
3:20:09
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
7:24/mi
3:27:41
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:43:307:54 /mi⚖️ balanced
2nd Half
1:44:117:57 /mi⚖️ balanced
Even split — consistent pacing between halves
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Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
5K
24:538:013.11 mi24:53
8:01
-
10K
49:007:533.10 mi24:07
7:46
-0:15
15K
1:13:187:523.11 mi24:18
7:49
+0:03
20K
1:38:027:533.11 mi24:44
7:58
+0:09
Half(13.11 mi)
1:43:307:540.68 mi5:28
8:01
+0:03
25K
2:02:597:552.42 mi19:29
8:02
+0:01
30K
2:28:147:573.11 mi25:15
8:08
+0:06
20M
2:39:197:581.36 mi11:05
8:09
+0:01
21M
2:47:257:581.00 mi8:06
8:06
-0:03
35K
2:53:047:570.75 mi5:39
7:33
-0:33
23M
3:02:557:571.25 mi9:51
7:52
+0:19
24M
3:10:377:571.00 mi7:42
7:42
-0:10
40K
3:17:197:560.85 mi6:42
7:50
+0:08
25.2M
3:20:097:570.35 mi2:50
8:13
+0:23
Finish(26.22 mi)
3:27:417:561.02 mi7:32
7:24
-0:49
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

7:24 /mi

Average Pace

7:56 /mi

Slowest Pace

8:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

3:13:46

93% of race

Time at Steady Pace

13:55

7% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:55 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

Heatmap

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0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi14073997499741289294679467
10K6.21 mi3.10 mi13459+6149728+2469728+2461277794589458
15K9.32 mi3.11 mi13262+1979630+989630+981289294679467
20K12.43 mi3.11 mi13211+519584+469584+461309494789478
Half13.11 mi0.68 mi13271-609605-219605-21144021004110041
25K15.53 mi2.42 mi13197+749568+379568+371300493539353
30K18.64 mi3.11 mi12915+2829399+1699399+1691182387298729
20M20.00 mi1.36 mi12754+1619310+899310+891137884408440
21M21.00 mi1.00 mi12429+3259162+1489162+148801764946494
35K21.75 mi0.75 mi12293+1369087+759087+75892170457045
23M23.00 mi1.25 mi12065+2288954+1338954+133886169046904
24M24.00 mi1.00 mi11925+1408875+798875+79908169376937
40K24.85 mi0.85 mi11788+1378797+788797+78890467666766
25.2M25.20 mi0.35 mi11718+708759+388759+38778760636063
Finish26.22 mi1.02 mi11508+2108636+1238636+123773760236023

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 48%
×21story building
+97ft-345ft

Overall

12892

Males

9467

M55-59

9467

5K→10K

3.1 - 6.2 mi

Top 48%
×5story building
+79ft-138ft

Overall

12777

Males

9458

M55-59

9458

10K→15K

6.2 - 9.3 mi

Top 48%
×3story building
+67ft-78ft

Overall

12892

Males

9467

M55-59

9467

15K→20K

9.3 - 12.4 mi

Top 49%
×5story building
+106ft-86ft

Overall

13094

Males

9478

M55-59

9478

20K→Half

12.4 - 13.1 mi

Top 54%
×2story building
+19ft-37ft

Overall

14402

Males

10041

M55-59

10041

Half→25K

13.1 - 15.5 mi

Top 49%
×4story building
+66ft-88ft

Overall

13004

Males

9353

M55-59

9353

25K→30K

15.5 - 18.6 mi

Top 44%
×9story building
+181ft-148ft

Overall

11823

Males

8729

M55-59

8729

30K→20M

18.6 - 20.0 mi

Top 43%
×5story building
+64ft-50ft

Overall

11378

Males

8440

M55-59

8440

20M→21M

20.0 - 21.0 mi

Top 30%
×8story building
+106ft-24ft

Overall

8017

Males

6494

M55-59

6494

21M→35K

21.0 - 21.8 mi

Top 34%
×7story building
+17ft-86ft

Overall

8921

Males

7045

M55-59

7045

35K→23M

21.8 - 23.0 mi

Top 33%
×5story building
+23ft-63ft

Overall

8861

Males

6904

M55-59

6904

23M→24M

23.0 - 24.0 mi

Top 34%
×6story building
+12ft-82ft

Overall

9081

Males

6937

M55-59

6937

24M→40K

24.0 - 24.9 mi

Top 33%
×1story
+6ft-20ft

Overall

8904

Males

6766

M55-59

6766

40K→25.2M

24.9 - 25.2 mi

Top 29%
×1story
+13ft-16ft

Overall

7787

Males

6063

M55-59

6063

25.2M→Finish

25.2 - 26.2 mi

Top 29%
×2story building
+22ft-21ft

Overall

7737

Males

6023

M55-59

6023

Passing Analysis

Category:
Athletes Passed
3256
Passed By
691
Net Change
+2565
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14073
5K → 10K715101+614#14073#13459
10K → 15K317120+197#13459#13262
15K → 20K207156+51#13262#13211
20K → Half1373-60#13211#13271
Half → 25K174100+74#13271#13197
25K → 30K34967+282#13197#12915
30K → 20M19029+161#12915#12754
20M → 21M3272+325#12754#12429
21M → 35K1371+136#12429#12293
35K → 23M23911+228#12293#12065
23M → 24M15111+140#12065#11925
24M → 40K14912+137#11925#11788
40K → 25.2M733+70#11788#11718
25.2M → Finish2155+210#11718#11508
TOTALS3256691+2565

Passing Charts

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