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BOSTON MARATHON 2023

Siu Hung Chau

Bib: 19721•M

NY

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M65-69)
#0 / 549
Top 18%
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
7:15/mi
22:30
↑ 97↓ 3451.5%
10K· 6.21 mi
7:16/mi
45:04
↑ 79↓ 1380.4%
15K· 9.32 mi
7:38/mi
1:08:47
↑ 67↓ 78
20K· 12.43 mi
8:03/mi
1:33:48
↑ 106↓ 860.1%
Half· 13.11 mi
8:01/mi
1:39:16
↑ 19↓ 370.5%
25K· 15.53 mi
8:20/mi
1:59:29
↑ 66↓ 880.2%
30K· 18.64 mi
8:49/mi
2:26:53
↑ 181↓ 1480.2%
20M
10:33/mi
2:41:13
↑ 64↓ 500.2%
21M
10:27/mi
2:51:40
↑ 106↓ 241.6%
35K· 21.75 mi
8:51/mi
2:58:17
↑ 17↓ 861.7%
23M
10:49/mi
3:11:49
↑ 23↓ 630.6%
24M
10:41/mi
3:22:30
↓ 821.3%
40K· 24.85 mi
9:39/mi
3:30:45
↓ 200.3%
25.2M
10:06/mi
3:34:14
↑ 13↓ 160.2%
Finish· 26.22 mi
10:02/mi
3:44:27
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:39:16
Pace7:34 /mi
2nd Half
Distance13.11 mi
Time2:05:11
Pace9:33 /mi
📊Positive Split: 26.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:13:5122:307:1522:30
7:15
-
10K
6.21 mi11:36:2545:047:1522:34
7:16
+0:01
15K
9.32 mi12:00:081:08:477:2323:43
7:38
+0:22
20K
12.43 mi12:25:091:33:487:3325:01
8:03
+0:25
Half
13.11 mi12:30:371:39:167:345:28
8:01
-0:02
25K
15.53 mi12:50:501:59:297:4120:13
8:20
+0:19
30K
18.64 mi13:18:142:26:537:5327:24
8:49
+0:29
20M
20.00 mi13:32:342:41:138:0414:20
10:33
+1:44
21M
21.00 mi13:43:012:51:408:1010:27
10:27
-0:06
35K
21.75 mi13:49:382:58:178:126:37
8:51
-1:36
23M
23.00 mi14:03:103:11:498:2013:32
10:49
+1:58
24M
24.00 mi14:13:513:22:308:2610:41
10:41
-0:08
40K
24.85 mi14:22:063:30:458:298:15
9:39
-1:02
25.2M
25.20 mi14:25:353:34:148:303:29
10:06
+0:27
Finish
26.22 mi14:35:483:44:278:3410:13
10:02
-0:04

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

7:15 /mi

Average Pace

8:34 /mi

Slowest Pace

10:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:39:16

44% of race

Time at Steady Pace

54:14

24% of race

Time at Slower Pace

1:10:57

32% of race

Average Pace: 8:34 /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 mi11:13:5122:307:1522:30
7:15
#7755
10K
6.21 mi11:36:2545:047:1522:34
7:16
#8137
15K
9.32 mi12:00:081:08:477:2323:43
7:38
#9047
20K
12.43 mi12:25:091:33:487:3325:01
8:03
#10256
Half
13.11 mi12:30:371:39:167:345:28
8:01
#10480
25K
15.53 mi12:50:501:59:297:4120:13
8:20
#11231
30K
18.64 mi13:18:142:26:537:5327:24
8:49
#12301
20M
20.00 mi13:32:342:41:138:0414:20
10:33
#13516
21M
21.00 mi13:43:012:51:408:1010:27
10:27
#14020
35K
21.75 mi13:49:382:58:178:126:37
8:51
#14152
23M
23.00 mi14:03:103:11:498:2013:32
10:49
#14926
24M
24.00 mi14:13:513:22:308:2610:41
10:41
#15471
40K
24.85 mi14:22:063:30:458:298:15
9:39
#15645
25.2M
25.20 mi14:25:353:34:148:303:29
10:06
#15678
Finish
26.22 mi14:35:483:44:278:3410:13
10:02
#16037
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM65-69Seg. OverallSeg. MalesSeg. M65-69
5K3.11 mi3.11 mi77556819681911299(Top 42%)8774(Top 58%)8774(Top 1598%)
10K6.21 mi3.10 mi8137-3827051-2327051-2328588(Top 32%)7327(Top 48%)7327(Top 1335%)
15K9.32 mi3.11 mi9047-9107591-5407591-54011299(Top 42%)8774(Top 58%)8774(Top 1598%)
20K12.43 mi3.11 mi10256-12098291-7008291-70013849(Top 52%)9823(Top 65%)9823(Top 1789%)
Half13.11 mi0.68 mi10480-2248406-1158406-11514454(Top 54%)10093(Top 67%)10093(Top 1838%)
25K15.53 mi2.42 mi11231-7518725-3198725-31915181(Top 57%)10213(Top 67%)10213(Top 1860%)
30K18.64 mi3.11 mi12301-10709132-4079132-40716185(Top 61%)10560(Top 70%)10560(Top 1923%)
20M20.00 mi1.36 mi13516-12159631-4999631-49921831(Top 82%)12919(Top 85%)12919(Top 2353%)
21M21.00 mi1.00 mi14020-5049806-1759806-17519417(Top 73%)11799(Top 78%)11799(Top 2149%)
35K21.75 mi0.75 mi14152-1329835-299835-2917142(Top 64%)10761(Top 71%)10761(Top 1960%)
23M23.00 mi1.25 mi14926-77410119-28410119-28421973(Top 83%)12892(Top 85%)12892(Top 2348%)
24M24.00 mi1.00 mi15471-54510293-17410293-17422400(Top 84%)13061(Top 86%)13061(Top 2379%)
40K24.85 mi0.85 mi15645-17410352-5910352-5918842(Top 71%)11415(Top 75%)11415(Top 2079%)
25.2M25.20 mi0.35 mi15678-3310367-1510367-1517725(Top 67%)10884(Top 72%)10884(Top 1983%)
Finish26.22 mi1.02 mi16037-35910505-13810505-13821810(Top 82%)12770(Top 84%)12770(Top 2326%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 42%
×21story building
+97ft-345ft

Overall

11299

Males

8774

M65-69

8774

5K→10K

3.1 - 6.2 mi

Top 32%
×5story building
+79ft-138ft

Overall

8588

Males

7327

M65-69

7327

10K→15K

6.2 - 9.3 mi

Top 42%
×3story building
+67ft-78ft

Overall

11299

Males

8774

M65-69

8774

15K→20K

9.3 - 12.4 mi

Top 52%
×5story building
+106ft-86ft

Overall

13849

Males

9823

M65-69

9823

20K→Half

12.4 - 13.1 mi

Top 54%
×2story building
+19ft-37ft

Overall

14454

Males

10093

M65-69

10093

Half→25K

13.1 - 15.5 mi

Top 57%
×4story building
+66ft-88ft

Overall

15181

Males

10213

M65-69

10213

25K→30K

15.5 - 18.6 mi

Top 61%
×9story building
+181ft-148ft

Overall

16185

Males

10560

M65-69

10560

30K→20M

18.6 - 20.0 mi

Top 82%
×5story building
+64ft-50ft

Overall

21831

Males

12919

M65-69

12919

20M→21M

20.0 - 21.0 mi

Top 73%
×8story building
+106ft-24ft

Overall

19417

Males

11799

M65-69

11799

21M→35K

21.0 - 21.8 mi

Top 64%
×7story building
+17ft-86ft

Overall

17142

Males

10761

M65-69

10761

35K→23M

21.8 - 23.0 mi

Top 83%
×5story building
+23ft-63ft

Overall

21973

Males

12892

M65-69

12892

23M→24M

23.0 - 24.0 mi

Top 84%
×6story building
+12ft-82ft

Overall

22400

Males

13061

M65-69

13061

24M→40K

24.0 - 24.9 mi

Top 71%
×1story
+6ft-20ft

Overall

18842

Males

11415

M65-69

11415

40K→25.2M

24.9 - 25.2 mi

Top 67%
×1story
+13ft-16ft

Overall

17725

Males

10884

M65-69

10884

25.2M→Finish

25.2 - 26.2 mi

Top 82%
×2story building
+22ft-21ft

Overall

21810

Males

12770

M65-69

12770

Passing Analysis

Category:
Athletes Passed
278
Passed By
8559
Net Change
-8282
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7755
5K → 10K84466-382#7755#8137
10K → 15K13923-910#8137#9047
15K → 20K131221-1209#9047#10256
20K → Half1225-224#10256#10480
Half → 25K26777-751#10480#11231
25K → 30K281098-1070#11231#12301
30K → 20M81223-1215#12301#13516
20M → 21M14518-504#13516#14020
21M → 35K14146-132#14020#14152
35K → 23M9783-774#14152#14926
23M → 24M11556-545#14926#15471
24M → 40K27201-174#15471#15645
40K → 25.2M1750-33#15645#15678
25.2M → Finish13372-359#15678#16037
TOTALS2788559-8282
📊

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