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BOSTON MARATHON 2023

Chien Ming Liao

Bib: 12913•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
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

Start
0:00:00
Race begins
5K· 3.11 mi
25:21
Rank: #15139
Start → 5K
25:21 | 8:10/mi
10K· 6.21 mi
51:05
Rank: #15967 (-828)
5K → 10K
25:44 | 8:17/mi
15K· 9.32 mi
1:17:42
Rank: #16760 (-793)
10K → 15K
26:37 | 8:34/mi
20K· 12.43 mi
1:44:45
Rank: #17138 (-378)
15K → 20K
27:03 | 8:42/mi
Half· 13.11 mi
1:50:44
Rank: #17236 (-98)
20K → Half
5:59 | 8:46/mi
25K· 15.53 mi
2:12:03
Rank: #17318 (-82)
Half → 25K
21:19 | 8:48/mi
30K· 18.64 mi
2:40:14
Rank: #17322 (-4)
25K → 30K
28:11 | 9:04/mi
20M
2:52:52
Rank: #17376 (-54)
30K → 20M
12:38 | 9:18/mi
21M
3:02:44
Rank: #17387 (-11)
20M → 21M
9:52 | 9:52/mi
35K· 21.75 mi
3:09:11
Rank: #17328 (+59)
21M → 35K
6:27 | 8:37/mi
23M
3:20:47
Rank: #17344 (-16)
35K → 23M
11:36 | 9:16/mi
24M
3:29:32
Rank: #17276 (+68)
23M → 24M
8:45 | 8:45/mi
40K· 24.85 mi
3:37:06
Rank: #17194 (+82)
24M → 40K
7:34 | 8:51/mi
25.2M
3:40:23
Rank: #17175 (+19)
40K → 25.2M
3:17 | 9:31/mi
Finish· 26.22 mi
3:49:05
Rank: #17124 (+51)
25.2M → Finish
8:42 | 8:32/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:50:44
Pace8:27 /mi
2nd Half
Distance13.11 mi
Time1:58:21
Pace9:02 /mi
📊Positive Split: 6.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:5325:218:1025:21
8:10
-
10K
6.21 mi11:18:3751:058:1325:44
8:17
+0:07
15K
9.32 mi11:45:141:17:428:2026:37
8:34
+0:17
20K
12.43 mi12:12:171:44:458:2627:03
8:42
+0:08
Half
13.11 mi12:18:161:50:448:275:59
8:46
+0:04
25K
15.53 mi12:39:352:12:038:3021:19
8:48
+0:02
30K
18.64 mi13:07:462:40:148:3628:11
9:04
+0:16
20M
20.00 mi13:20:242:52:528:3912:38
9:18
+0:14
21M
21.00 mi13:30:163:02:448:429:52
9:52
+0:34
35K
21.75 mi13:36:433:09:118:426:27
8:37
-1:15
23M
23.00 mi13:48:193:20:478:4411:36
9:16
+0:39
24M
24.00 mi13:57:043:29:328:448:45
8:45
-0:31
40K
24.85 mi14:04:383:37:068:447:34
8:51
+0:06
25.2M
25.20 mi14:07:553:40:238:453:17
9:31
+0:40
Finish
26.22 mi14:16:373:49:058:458:42
8:32
-0:59

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

8:10 /mi

Average Pace

8:45 /mi

Slowest Pace

9:52 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

59:47

26% of race

Time at Steady Pace

1:43:44

45% of race

Time at Slower Pace

1:05:34

29% of race

Average Pace: 8:44 /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 mi10:52:5325:218:1025:21
8:10
#15139
10K
6.21 mi11:18:3751:058:1325:44
8:17
#15967
15K
9.32 mi11:45:141:17:428:2026:37
8:34
#16760
20K
12.43 mi12:12:171:44:458:2627:03
8:42
#17138
Half
13.11 mi12:18:161:50:448:275:59
8:46
#17236
25K
15.53 mi12:39:352:12:038:3021:19
8:48
#17318
30K
18.64 mi13:07:462:40:148:3628:11
9:04
#17322
20M
20.00 mi13:20:242:52:528:3912:38
9:18
#17376
21M
21.00 mi13:30:163:02:448:429:52
9:52
#17387
35K
21.75 mi13:36:433:09:118:426:27
8:37
#17328
23M
23.00 mi13:48:193:20:478:4411:36
9:16
#17344
24M
24.00 mi13:57:043:29:328:448:45
8:45
#17276
40K
24.85 mi14:04:383:37:068:447:34
8:51
#17194
25.2M
25.20 mi14:07:553:40:238:453:17
9:31
#17175
Finish
26.22 mi14:16:373:49:058:458:42
8:32
#17124
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi15139103881038818234(Top 68%)11577(Top 76%)11577(Top 564%)
10K6.21 mi3.10 mi15967-82810685-29710685-29716798(Top 63%)11035(Top 73%)11035(Top 538%)
15K9.32 mi3.11 mi16760-79310968-28310968-28318234(Top 68%)11577(Top 76%)11577(Top 564%)
20K12.43 mi3.11 mi17138-37811105-13711105-13718149(Top 68%)11539(Top 76%)11539(Top 562%)
Half13.11 mi0.68 mi17236-9811147-4211147-4219289(Top 72%)11995(Top 79%)11995(Top 585%)
25K15.53 mi2.42 mi17318-8211169-2211169-2217897(Top 67%)11361(Top 75%)11361(Top 554%)
30K18.64 mi3.11 mi17322-411153+1611153+1617534(Top 66%)11136(Top 73%)11136(Top 543%)
20M20.00 mi1.36 mi17376-5411151+211151+217994(Top 68%)11229(Top 74%)11229(Top 547%)
21M21.00 mi1.00 mi17387-1111142+911142+917494(Top 66%)10995(Top 72%)10995(Top 536%)
35K21.75 mi0.75 mi17328+5911103+3911103+3915952(Top 60%)10275(Top 68%)10275(Top 501%)
23M23.00 mi1.25 mi17344-1611101+211101+217345(Top 65%)10850(Top 71%)10850(Top 529%)
24M24.00 mi1.00 mi17276+6811066+3511066+3515922(Top 60%)10140(Top 67%)10140(Top 494%)
40K24.85 mi0.85 mi17194+8211004+6211004+6215341(Top 58%)9839(Top 65%)9839(Top 479%)
25.2M25.20 mi0.35 mi17175+1910995+910995+915254(Top 57%)9795(Top 65%)9795(Top 477%)
Finish26.22 mi1.02 mi17124+5110961+3410961+3415617(Top 59%)10003(Top 66%)10003(Top 487%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 68%
×21stories
+97ft-345ft

Overall

18234

Males

11577

M50-54

11577

5K→10K

3.1 - 6.2 mi

Top 63%
×5stories
+79ft-138ft

Overall

16798

Males

11035

M50-54

11035

10K→15K

6.2 - 9.3 mi

Top 68%
×3stories
+67ft-78ft

Overall

18234

Males

11577

M50-54

11577

15K→20K

9.3 - 12.4 mi

Top 68%
×5stories
+106ft-86ft

Overall

18149

Males

11539

M50-54

11539

20K→Half

12.4 - 13.1 mi

Top 72%
×2stories
+19ft-37ft

Overall

19289

Males

11995

M50-54

11995

Half→25K

13.1 - 15.5 mi

Top 67%
×4stories
+66ft-88ft

Overall

17897

Males

11361

M50-54

11361

25K→30K

15.5 - 18.6 mi

Top 66%
×9stories
+181ft-148ft

Overall

17534

Males

11136

M50-54

11136

30K→20M

18.6 - 20.0 mi

Top 68%
×5stories
+64ft-50ft

Overall

17994

Males

11229

M50-54

11229

20M→21M

20.0 - 21.0 mi

Top 66%
×8stories
+106ft-24ft

Overall

17494

Males

10995

M50-54

10995

21M→35K

21.0 - 21.8 mi

Top 60%
×7stories
+17ft-86ft

Overall

15952

Males

10275

M50-54

10275

35K→23M

21.8 - 23.0 mi

Top 65%
×5stories
+23ft-63ft

Overall

17345

Males

10850

M50-54

10850

23M→24M

23.0 - 24.0 mi

Top 60%
×6stories
+12ft-82ft

Overall

15922

Males

10140

M50-54

10140

24M→40K

24.0 - 24.9 mi

Top 58%
×1story
+6ft-20ft

Overall

15341

Males

9839

M50-54

9839

40K→25.2M

24.9 - 25.2 mi

Top 57%
×1story
+13ft-16ft

Overall

15254

Males

9795

M50-54

9795

25.2M→Finish

25.2 - 26.2 mi

Top 59%
×2stories
+22ft-21ft

Overall

15617

Males

10003

M50-54

10003

Passing Analysis

Category:
Athletes Passed
1082
Passed By
3067
Net Change
-1985
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15139
5K → 10K67895-828#15139#15967
10K → 15K30823-793#15967#16760
15K → 20K82460-378#16760#17138
20K → Half4102-98#17138#17236
Half → 25K100182-82#17236#17318
25K → 30K170174-4#17318#17322
30K → 20M66120-54#17322#17376
20M → 21M7990-11#17376#17387
21M → 35K8425+59#17387#17328
35K → 23M7894-16#17328#17344
23M → 24M9527+68#17344#17276
24M → 40K10927+82#17276#17194
40K → 25.2M2910+19#17194#17175
25.2M → Finish8938+51#17175#17124
TOTALS10823067-1985
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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