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BOSTON MARATHON 2023

Shih-Hung Chuang

Bib: 15257 M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 47%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M50-54)
#0 / 2052
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
7:51/mi
24:22
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:54/mi
48:56
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
8:02/mi
1:13:52
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
8:07/mi
1:39:05
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:45/mi
1:44:22
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
8:04/mi
2:03:55
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
8:11/mi
2:29:21
↑ 181↓ 1480.2%
138 ft elev
20M
8:15/mi
2:40:34
↑ 64↓ 500.2%
148 ft elev
21M
8:57/mi
2:49:31
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
8:03/mi
2:55:32
↑ 17↓ 861.7%
156 ft elev
23M
8:03/mi
3:05:37
↑ 23↓ 630.6%
116 ft elev
24M
7:33/mi
3:13:10
↓ 821.3%
34 ft elev
40K· 24.85 mi
7:51/mi
3:19:53
↓ 200.3%
20 ft elev
25.2M
8:36/mi
3:22:51
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
8:04/mi
3:31:04
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:22
Pace7:58 /mi
2nd Half
Distance13.11 mi
Time1:46:42
Pace8:08 /mi
📊Positive Split: 2.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:2624:227:5124:22
7:51
-
10K
6.21 mi11:19:0048:567:5324:34
7:54
+0:03
15K
9.32 mi11:43:561:13:527:5624:56
8:02
+0:08
20K
12.43 mi12:09:091:39:057:5825:13
8:07
+0:05
Half
13.11 mi12:14:261:44:227:585:17
7:45
-0:22
25K
15.53 mi12:33:592:03:557:5919:33
8:04
+0:19
30K
18.64 mi12:59:252:29:218:0125:26
8:11
+0:07
20M
20.00 mi13:10:382:40:348:0211:13
8:15
+0:04
21M
21.00 mi13:19:352:49:318:048:57
8:57
+0:42
35K
21.75 mi13:25:362:55:328:046:01
8:03
-0:54
23M
23.00 mi13:35:413:05:378:0410:05
8:03
0:00
24M
24.00 mi13:43:143:13:108:037:33
7:33
-0:30
40K
24.85 mi13:49:573:19:538:036:43
7:51
+0:18
25.2M
25.20 mi13:52:553:22:518:032:58
8:36
+0:45
Finish
26.22 mi14:01:083:31:048:038:13
8:04
-0:32

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

7:33 /mi

Average Pace

8:03 /mi

Slowest Pace

8:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:19:09

94% of race

Time at Steady Pace

2:58

1% of race

Time at Slower Pace

8:57

4% of race

Average Pace: 8:03 /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 mi10:54:2624:227:5124:22
7:51
#12767
10K
6.21 mi11:19:0048:567:5324:34
7:54
#13381
15K
9.32 mi11:43:561:13:527:5624:56
8:02
#13771
20K
12.43 mi12:09:091:39:057:5825:13
8:07
#13879
Half
13.11 mi12:14:261:44:227:585:17
7:45
#13790
25K
15.53 mi12:33:592:03:557:5919:33
8:04
#13687
30K
18.64 mi12:59:252:29:218:0125:26
8:11
#13386
20M
20.00 mi13:10:382:40:348:0211:13
8:15
#13263
21M
21.00 mi13:19:352:49:318:048:57
8:57
#13226
35K
21.75 mi13:25:362:55:328:046:01
8:03
#13181
23M
23.00 mi13:35:413:05:378:0410:05
8:03
#12966
24M
24.00 mi13:43:143:13:108:037:33
7:33
#12751
40K
24.85 mi13:49:573:19:538:036:43
7:51
#12607
25.2M
25.20 mi13:52:553:22:518:032:58
8:36
#12560
Finish
26.22 mi14:01:083:31:048:038:13
8:04
#12556
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi127679439943914569(Top 55%)10121(Top 67%)10121(Top 493%)
10K6.21 mi3.10 mi13381-6149689-2509689-25014034(Top 53%)9950(Top 66%)9950(Top 485%)
15K9.32 mi3.11 mi13771-3909828-1399828-13914569(Top 55%)10121(Top 67%)10121(Top 493%)
20K12.43 mi3.11 mi13879-1089850-229850-2214310(Top 54%)9997(Top 66%)9997(Top 487%)
Half13.11 mi0.68 mi13790+899818+329818+3212206(Top 46%)9160(Top 60%)9160(Top 446%)
25K15.53 mi2.42 mi13687+1039748+709748+7013233(Top 50%)9450(Top 62%)9450(Top 461%)
30K18.64 mi3.11 mi13386+3019599+1499599+14912241(Top 46%)8904(Top 59%)8904(Top 434%)
20M20.00 mi1.36 mi13263+1239532+679532+6712032(Top 45%)8722(Top 57%)8722(Top 425%)
21M21.00 mi1.00 mi13226+379502+309502+3013097(Top 49%)9079(Top 60%)9079(Top 442%)
35K21.75 mi0.75 mi13181+459466+369466+3612397(Top 47%)8731(Top 58%)8731(Top 425%)
23M23.00 mi1.25 mi12966+2159337+1299337+12910129(Top 38%)7560(Top 50%)7560(Top 368%)
24M24.00 mi1.00 mi12751+2159233+1049233+1048050(Top 30%)6358(Top 42%)6358(Top 310%)
40K24.85 mi0.85 mi12607+1449157+769157+769041(Top 34%)6851(Top 45%)6851(Top 334%)
25.2M25.20 mi0.35 mi12560+479131+269131+2610150(Top 38%)7384(Top 49%)7384(Top 360%)
Finish26.22 mi1.02 mi12556+49097+349097+3412537(Top 47%)8544(Top 56%)8544(Top 416%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 55%
×21story building
+97ft-345ft

Overall

14569

Males

10121

M50-54

10121

5K→10K

3.1 - 6.2 mi

Top 53%
×5story building
+79ft-138ft

Overall

14034

Males

9950

M50-54

9950

10K→15K

6.2 - 9.3 mi

Top 55%
×3story building
+67ft-78ft

Overall

14569

Males

10121

M50-54

10121

15K→20K

9.3 - 12.4 mi

Top 54%
×5story building
+106ft-86ft

Overall

14310

Males

9997

M50-54

9997

20K→Half

12.4 - 13.1 mi

Top 46%
×2story building
+19ft-37ft

Overall

12206

Males

9160

M50-54

9160

Half→25K

13.1 - 15.5 mi

Top 50%
×4story building
+66ft-88ft

Overall

13233

Males

9450

M50-54

9450

25K→30K

15.5 - 18.6 mi

Top 46%
×9story building
+181ft-148ft

Overall

12241

Males

8904

M50-54

8904

30K→20M

18.6 - 20.0 mi

Top 45%
×5story building
+64ft-50ft

Overall

12032

Males

8722

M50-54

8722

20M→21M

20.0 - 21.0 mi

Top 49%
×8story building
+106ft-24ft

Overall

13097

Males

9079

M50-54

9079

21M→35K

21.0 - 21.8 mi

Top 47%
×7story building
+17ft-86ft

Overall

12397

Males

8731

M50-54

8731

35K→23M

21.8 - 23.0 mi

Top 38%
×5story building
+23ft-63ft

Overall

10129

Males

7560

M50-54

7560

23M→24M

23.0 - 24.0 mi

Top 30%
×6story building
+12ft-82ft

Overall

8050

Males

6358

M50-54

6358

24M→40K

24.0 - 24.9 mi

Top 34%
×1story
+6ft-20ft

Overall

9041

Males

6851

M50-54

6851

40K→25.2M

24.9 - 25.2 mi

Top 38%
×1story
+13ft-16ft

Overall

10150

Males

7384

M50-54

7384

25.2M→Finish

25.2 - 26.2 mi

Top 47%
×2story building
+22ft-21ft

Overall

12537

Males

8544

M50-54

8544

Passing Analysis

Category:
Athletes Passed
2028
Passed By
1817
Net Change
+211
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12767
5K → 10K101715-614#12767#13381
10K → 15K81471-390#13381#13771
15K → 20K145253-108#13771#13879
20K → Half945+89#13879#13790
Half → 25K18683+103#13790#13687
25K → 30K36261+301#13687#13386
30K → 20M15431+123#13386#13263
20M → 21M10063+37#13263#13226
21M → 35K7833+45#13226#13181
35K → 23M2227+215#13181#12966
23M → 24M2194+215#12966#12751
24M → 40K1528+144#12751#12607
40K → 25.2M536+47#12607#12560
25.2M → Finish8177+4#12560#12556
TOTALS20281817+211
📊

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