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BOSTON MARATHON 2023

Chwee (aka Justin) Chan

Bib: 18659•M

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0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M55-59)
#0 / 1422
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
8:23/mi
26:04
↑ 97↓ 3451.5%
10K· 6.21 mi
8:07/mi
51:18
↑ 79↓ 1380.4%
15K· 9.32 mi
8:12/mi
1:16:46
↑ 67↓ 78
20K· 12.43 mi
8:08/mi
1:42:02
↑ 106↓ 860.1%
Half· 13.11 mi
8:05/mi
1:47:33
↑ 19↓ 370.5%
25K· 15.53 mi
8:15/mi
2:07:33
↑ 66↓ 880.2%
30K· 18.64 mi
8:50/mi
2:35:01
↑ 181↓ 1480.2%
20M
9:10/mi
2:47:29
↑ 64↓ 500.2%
21M
9:57/mi
2:57:26
↑ 106↓ 241.6%
35K· 21.75 mi
9:04/mi
3:04:13
↑ 17↓ 861.7%
23M
8:50/mi
3:15:17
↑ 23↓ 630.6%
24M
8:36/mi
3:23:53
↓ 821.3%
40K· 24.85 mi
9:23/mi
3:31:54
↓ 200.3%
25.2M
10:26/mi
3:35:30
↑ 13↓ 160.2%
Finish· 26.22 mi
9:19/mi
3:45:00
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:47:33
Pace8:12 /mi
2nd Half
Distance13.11 mi
Time1:57:27
Pace8:58 /mi
📊Positive Split: 9.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:2626:048:2326:04
8:23
-
10K
6.21 mi11:42:4051:188:1525:14
8:07
-0:16
15K
9.32 mi12:08:081:16:468:1425:28
8:12
+0:05
20K
12.43 mi12:33:241:42:028:1325:16
8:08
-0:04
Half
13.11 mi12:38:551:47:338:125:31
8:05
-0:03
25K
15.53 mi12:58:552:07:338:1320:00
8:15
+0:10
30K
18.64 mi13:26:232:35:018:1927:28
8:50
+0:35
20M
20.00 mi13:38:512:47:298:2212:28
9:10
+0:20
21M
21.00 mi13:48:482:57:268:279:57
9:57
+0:47
35K
21.75 mi13:55:353:04:138:286:47
9:04
-0:53
23M
23.00 mi14:06:393:15:178:2911:04
8:50
-0:14
24M
24.00 mi14:15:153:23:538:308:36
8:36
-0:14
40K
24.85 mi14:23:163:31:548:328:01
9:23
+0:47
25.2M
25.20 mi14:26:523:35:308:333:36
10:26
+1:03
Finish
26.22 mi14:36:223:45:008:359:30
9:19
-1:07

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

8:05 /mi

Average Pace

8:35 /mi

Slowest Pace

10:26 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:07:33

57% of race

Time at Steady Pace

1:06:23

30% of race

Time at Slower Pace

31:04

14% of race

Average Pace: 8:35 /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 mi11:17:2626:048:2326:04
8:23
#16790
10K
6.21 mi11:42:4051:188:1525:14
8:07
#16208
15K
9.32 mi12:08:081:16:468:1425:28
8:12
#16084
20K
12.43 mi12:33:241:42:028:1325:16
8:08
#15643
Half
13.11 mi12:38:551:47:338:125:31
8:05
#15620
25K
15.53 mi12:58:552:07:338:1320:00
8:15
#15417
30K
18.64 mi13:26:232:35:018:1927:28
8:50
#15589
20M
20.00 mi13:38:512:47:298:2212:28
9:10
#15696
21M
21.00 mi13:48:482:57:268:279:57
9:57
#15858
35K
21.75 mi13:55:353:04:138:286:47
9:04
#15941
23M
23.00 mi14:06:393:15:178:2911:04
8:50
#15887
24M
24.00 mi14:15:153:23:538:308:36
8:36
#15850
40K
24.85 mi14:23:163:31:548:328:01
9:23
#15928
25.2M
25.20 mi14:26:523:35:308:333:36
10:26
#15989
Finish
26.22 mi14:36:223:45:008:359:30
9:19
#16177
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi16790109811098115843(Top 60%)10632(Top 70%)10632(Top 748%)
10K6.21 mi3.10 mi16208+58210789+19210789+19215667(Top 59%)10587(Top 70%)10587(Top 745%)
15K9.32 mi3.11 mi16084+12410729+6010729+6015843(Top 60%)10632(Top 70%)10632(Top 748%)
20K12.43 mi3.11 mi15643+44110543+18610543+18614448(Top 54%)10064(Top 66%)10064(Top 708%)
Half13.11 mi0.68 mi15620+2310530+1310530+1315017(Top 56%)10317(Top 68%)10317(Top 726%)
25K15.53 mi2.42 mi15417+20310422+10810422+10814574(Top 55%)9994(Top 66%)9994(Top 703%)
30K18.64 mi3.11 mi15589-17210452-3010452-3016304(Top 61%)10610(Top 70%)10610(Top 746%)
20M20.00 mi1.36 mi15696-10710469-1710469-1717412(Top 65%)10989(Top 72%)10989(Top 773%)
21M21.00 mi1.00 mi15858-16210507-3810507-3817830(Top 67%)11148(Top 73%)11148(Top 784%)
35K21.75 mi0.75 mi15941-8310526-1910526-1918135(Top 68%)11198(Top 74%)11198(Top 787%)
23M23.00 mi1.25 mi15887+5410474+5210474+5215191(Top 57%)9892(Top 65%)9892(Top 696%)
24M24.00 mi1.00 mi15850+3710443+3110443+3115044(Top 57%)9775(Top 64%)9775(Top 687%)
40K24.85 mi0.85 mi15928-7810469-2610469-2617831(Top 67%)10953(Top 72%)10953(Top 770%)
25.2M25.20 mi0.35 mi15989-6110491-2210491-2218861(Top 71%)11396(Top 75%)11396(Top 801%)
Finish26.22 mi1.02 mi16177-18810559-6810559-6819446(Top 73%)11721(Top 77%)11721(Top 824%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 60%
×21story building
+97ft-345ft

Overall

15843

Males

10632

M55-59

10632

5K→10K

3.1 - 6.2 mi

Top 59%
×5story building
+79ft-138ft

Overall

15667

Males

10587

M55-59

10587

10K→15K

6.2 - 9.3 mi

Top 60%
×3story building
+67ft-78ft

Overall

15843

Males

10632

M55-59

10632

15K→20K

9.3 - 12.4 mi

Top 54%
×5story building
+106ft-86ft

Overall

14448

Males

10064

M55-59

10064

20K→Half

12.4 - 13.1 mi

Top 56%
×2story building
+19ft-37ft

Overall

15017

Males

10317

M55-59

10317

Half→25K

13.1 - 15.5 mi

Top 55%
×4story building
+66ft-88ft

Overall

14574

Males

9994

M55-59

9994

25K→30K

15.5 - 18.6 mi

Top 61%
×9story building
+181ft-148ft

Overall

16304

Males

10610

M55-59

10610

30K→20M

18.6 - 20.0 mi

Top 65%
×5story building
+64ft-50ft

Overall

17412

Males

10989

M55-59

10989

20M→21M

20.0 - 21.0 mi

Top 67%
×8story building
+106ft-24ft

Overall

17830

Males

11148

M55-59

11148

21M→35K

21.0 - 21.8 mi

Top 68%
×7story building
+17ft-86ft

Overall

18135

Males

11198

M55-59

11198

35K→23M

21.8 - 23.0 mi

Top 57%
×5story building
+23ft-63ft

Overall

15191

Males

9892

M55-59

9892

23M→24M

23.0 - 24.0 mi

Top 57%
×6story building
+12ft-82ft

Overall

15044

Males

9775

M55-59

9775

24M→40K

24.0 - 24.9 mi

Top 67%
×1story
+6ft-20ft

Overall

17831

Males

10953

M55-59

10953

40K→25.2M

24.9 - 25.2 mi

Top 71%
×1story
+13ft-16ft

Overall

18861

Males

11396

M55-59

11396

25.2M→Finish

25.2 - 26.2 mi

Top 73%
×2story building
+22ft-21ft

Overall

19446

Males

11721

M55-59

11721

Passing Analysis

Category:
Athletes Passed
2237
Passed By
1624
Net Change
+613
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16790
5K → 10K689107+582#16790#16208
10K → 15K261137+124#16208#16084
15K → 20K46322+441#16084#15643
20K → Half4421+23#15643#15620
Half → 25K24643+203#15620#15417
25K → 30K122294-172#15417#15589
30K → 20M57164-107#15589#15696
20M → 21M37199-162#15696#15858
21M → 35K34117-83#15858#15941
35K → 23M11763+54#15941#15887
23M → 24M8952+37#15887#15850
24M → 40K40118-78#15850#15928
40K → 25.2M1677-61#15928#15989
25.2M → Finish22210-188#15989#16177
TOTALS22371624+613
📊

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