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BOSTON MARATHON 2023

Chih Hsien Chiu

Bib: 10804 M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M45-49)
#0 / 2252
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
7:24/mi
23:00
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:19/mi
45:45
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:29/mi
1:08:59
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:43/mi
1:32:56
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:37/mi
1:38:08
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
8:08/mi
1:57:51
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
8:50/mi
2:25:19
↑ 181↓ 1480.2%
138 ft elev
20M
9:56/mi
2:38:49
↑ 64↓ 500.2%
148 ft elev
21M
13:19/mi
2:52:08
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
8:48/mi
2:58:43
↑ 17↓ 861.7%
156 ft elev
23M
8:58/mi
3:09:56
↑ 23↓ 630.6%
116 ft elev
24M
9:15/mi
3:19:11
↓ 821.3%
34 ft elev
40K· 24.85 mi
8:54/mi
3:26:48
↓ 200.3%
20 ft elev
25.2M
9:17/mi
3:30:00
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
8:22/mi
3:38:32
↑ 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
Time1:38:08
Pace7:29 /mi
2nd Half
Distance13.11 mi
Time2:00:24
Pace9:11 /mi
📊Positive Split: 22.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:1823:007:2423:00
7:24
-
10K
6.21 mi11:12:0345:457:2222:45
7:19
-0:05
15K
9.32 mi11:35:171:08:597:2423:14
7:29
+0:10
20K
12.43 mi11:59:141:32:567:2923:57
7:43
+0:14
Half
13.11 mi12:04:261:38:087:295:12
7:37
-0:06
25K
15.53 mi12:24:091:57:517:3519:43
8:08
+0:31
30K
18.64 mi12:51:372:25:197:4827:28
8:50
+0:42
20M
20.00 mi13:05:072:38:497:5613:30
9:56
+1:06
21M
21.00 mi13:18:262:52:088:1213:19
13:19
+3:23
35K
21.75 mi13:25:012:58:438:136:35
8:48
-4:31
23M
23.00 mi13:36:143:09:568:1511:13
8:58
+0:10
24M
24.00 mi13:45:293:19:118:189:15
9:15
+0:17
40K
24.85 mi13:53:063:26:488:197:37
8:54
-0:21
25.2M
25.20 mi13:56:183:30:008:203:12
9:17
+0:23
Finish
26.22 mi14:04:503:38:328:208:32
8:22
-0:55

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

7:19 /mi

Average Pace

8:20 /mi

Slowest Pace

13:19 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:38:08

45% of race

Time at Steady Pace

1:33:35

43% of race

Time at Slower Pace

26:49

12% of race

Average Pace: 8:20 /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 mi10:49:1823:007:2423:00
7:24
#8850
10K
6.21 mi11:12:0345:457:2222:45
7:19
#8913
15K
9.32 mi11:35:171:08:597:2423:14
7:29
#9190
20K
12.43 mi11:59:141:32:567:2923:57
7:43
#9636
Half
13.11 mi12:04:261:38:087:295:12
7:37
#9708
25K
15.53 mi12:24:091:57:517:3519:43
8:08
#10363
30K
18.64 mi12:51:372:25:197:4827:28
8:50
#11575
20M
20.00 mi13:05:072:38:497:5613:30
9:56
#12560
21M
21.00 mi13:18:262:52:088:1213:19
13:19
#14194
35K
21.75 mi13:25:012:58:438:136:35
8:48
#14288
23M
23.00 mi13:36:143:09:568:1511:13
8:58
#14385
24M
24.00 mi13:45:293:19:118:189:15
9:15
#14571
40K
24.85 mi13:53:063:26:488:197:37
8:54
#14599
25.2M
25.20 mi13:56:183:30:008:203:12
9:17
#14583
Finish
26.22 mi14:04:503:38:328:208:32
8:22
#14564
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi8850750975099998(Top 38%)8150(Top 54%)8150(Top 362%)
10K6.21 mi3.10 mi8913-637527-187527-189033(Top 34%)7604(Top 50%)7604(Top 338%)
15K9.32 mi3.11 mi9190-2777681-1547681-1549998(Top 38%)8150(Top 54%)8150(Top 362%)
20K12.43 mi3.11 mi9636-4467947-2667947-26610988(Top 41%)8578(Top 57%)8578(Top 381%)
Half13.11 mi0.68 mi9708-727987-407987-4011212(Top 42%)8744(Top 58%)8744(Top 388%)
25K15.53 mi2.42 mi10363-6558324-3378324-33713732(Top 52%)9663(Top 64%)9663(Top 429%)
30K18.64 mi3.11 mi11575-12128826-5028826-50216299(Top 61%)10605(Top 70%)10605(Top 471%)
20M20.00 mi1.36 mi12560-9859237-4119237-41120268(Top 76%)12235(Top 81%)12235(Top 543%)
21M21.00 mi1.00 mi14194-16349867-6309867-63024402(Top 92%)14083(Top 93%)14083(Top 625%)
35K21.75 mi0.75 mi14288-949889-229889-2216899(Top 63%)10648(Top 70%)10648(Top 473%)
23M23.00 mi1.25 mi14385-979905-169905-1615822(Top 59%)10154(Top 67%)10154(Top 451%)
24M24.00 mi1.00 mi14571-1869961-569961-5618232(Top 68%)11183(Top 74%)11183(Top 497%)
40K24.85 mi0.85 mi14599-289940+219940+2115640(Top 59%)9966(Top 66%)9966(Top 443%)
25.2M25.20 mi0.35 mi14583+169926+149926+1414034(Top 53%)9252(Top 61%)9252(Top 411%)
Finish26.22 mi1.02 mi14564+199909+179909+1714541(Top 55%)9510(Top 63%)9510(Top 422%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 38%
×21story building
+97ft-345ft

Overall

9998

Males

8150

M45-49

8150

5K→10K

3.1 - 6.2 mi

Top 34%
×5story building
+79ft-138ft

Overall

9033

Males

7604

M45-49

7604

10K→15K

6.2 - 9.3 mi

Top 38%
×3story building
+67ft-78ft

Overall

9998

Males

8150

M45-49

8150

15K→20K

9.3 - 12.4 mi

Top 41%
×5story building
+106ft-86ft

Overall

10988

Males

8578

M45-49

8578

20K→Half

12.4 - 13.1 mi

Top 42%
×2story building
+19ft-37ft

Overall

11212

Males

8744

M45-49

8744

Half→25K

13.1 - 15.5 mi

Top 52%
×4story building
+66ft-88ft

Overall

13732

Males

9663

M45-49

9663

25K→30K

15.5 - 18.6 mi

Top 61%
×9story building
+181ft-148ft

Overall

16299

Males

10605

M45-49

10605

30K→20M

18.6 - 20.0 mi

Top 76%
×5story building
+64ft-50ft

Overall

20268

Males

12235

M45-49

12235

20M→21M

20.0 - 21.0 mi

Top 92%
×8story building
+106ft-24ft

Overall

24402

Males

14083

M45-49

14083

21M→35K

21.0 - 21.8 mi

Top 63%
×7story building
+17ft-86ft

Overall

16899

Males

10648

M45-49

10648

35K→23M

21.8 - 23.0 mi

Top 59%
×5story building
+23ft-63ft

Overall

15822

Males

10154

M45-49

10154

23M→24M

23.0 - 24.0 mi

Top 68%
×6story building
+12ft-82ft

Overall

18232

Males

11183

M45-49

11183

24M→40K

24.0 - 24.9 mi

Top 59%
×1story
+6ft-20ft

Overall

15640

Males

9966

M45-49

9966

40K→25.2M

24.9 - 25.2 mi

Top 53%
×1story
+13ft-16ft

Overall

14034

Males

9252

M45-49

9252

25.2M→Finish

25.2 - 26.2 mi

Top 55%
×2story building
+22ft-21ft

Overall

14541

Males

9510

M45-49

9510

Passing Analysis

Category:
Athletes Passed
694
Passed By
6406
Net Change
-5714
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8850
5K → 10K243306-63#8850#8913
10K → 15K66343-277#8913#9190
15K → 20K44490-446#9190#9636
20K → Half779-72#9636#9708
Half → 25K28681-655#9708#10363
25K → 30K221234-1212#10363#11575
30K → 20M6991-985#11575#12560
20M → 21M11635-1634#12560#14194
21M → 35K27121-94#14194#14288
35K → 23M59156-97#14288#14385
23M → 24M33219-186#14385#14571
24M → 40K5179-28#14571#14599
40K → 25.2M3822+16#14599#14583
25.2M → Finish6950+19#14583#14564
TOTALS6946406-5714
📊

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