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BOSTON MARATHON 2023

Alex Cha

Bib: 5425•M

CA

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
26:21
Rank: #17416
Start → 5K
26:21 | 8:29/mi
10K· 6.21 mi
51:33
Rank: #16469 (+947)
5K → 10K
25:12 | 8:07/mi
15K· 9.32 mi
1:16:44
Rank: #16059 (+410)
10K → 15K
25:11 | 8:06/mi
20K· 12.43 mi
1:42:03
Rank: #15653 (+406)
15K → 20K
25:19 | 8:09/mi
Half· 13.11 mi
1:47:31
Rank: #15596 (+57)
20K → Half
5:28 | 8:01/mi
25K· 15.53 mi
2:07:58
Rank: #15601 (-5)
Half → 25K
20:27 | 8:26/mi
30K· 18.64 mi
2:35:12
Rank: #15646 (-45)
25K → 30K
27:14 | 8:46/mi
20M
2:47:38
Rank: #15751 (-105)
30K → 20M
12:26 | 9:09/mi
21M
2:57:33
Rank: #15898 (-147)
20M → 21M
9:55 | 9:55/mi
35K· 21.75 mi
3:04:14
Rank: #15945 (-47)
21M → 35K
6:41 | 8:56/mi
23M
3:15:34
Rank: #15970 (-25)
35K → 23M
11:20 | 9:03/mi
24M
3:24:10
Rank: #15923 (+47)
23M → 24M
8:36 | 8:36/mi
40K· 24.85 mi
3:31:45
Rank: #15899 (+24)
24M → 40K
7:35 | 8:52/mi
25.2M
3:34:58
Rank: #15850 (+49)
40K → 25.2M
3:13 | 9:20/mi
Finish· 26.22 mi
3:43:56
Rank: #15916 (-66)
25.2M → Finish
8:58 | 8:48/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:47:31
Pace8:12 /mi
2nd Half
Distance13.11 mi
Time1:56:25
Pace8:53 /mi
📊Positive Split: 8.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:0126:218:2926:21
8:29
-
10K
6.21 mi11:17:1351:338:1825:12
8:07
-0:22
15K
9.32 mi11:42:241:16:448:1425:11
8:06
-0:01
20K
12.43 mi12:07:431:42:038:1325:19
8:09
+0:03
Half
13.11 mi12:13:111:47:318:125:28
8:01
-0:08
25K
15.53 mi12:33:382:07:588:1420:27
8:26
+0:25
30K
18.64 mi13:00:522:35:128:2027:14
8:46
+0:20
20M
20.00 mi13:13:182:47:388:2312:26
9:09
+0:23
21M
21.00 mi13:23:132:57:338:279:55
9:55
+0:46
35K
21.75 mi13:29:543:04:148:286:41
8:56
-0:59
23M
23.00 mi13:41:143:15:348:3011:20
9:03
+0:07
24M
24.00 mi13:49:503:24:108:308:36
8:36
-0:27
40K
24.85 mi13:57:253:31:458:317:35
8:52
+0:16
25.2M
25.20 mi14:00:383:34:588:323:13
9:20
+0:28
Finish
26.22 mi14:09:363:43:568:338:58
8:48
-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

8:01 /mi

Average Pace

8:33 /mi

Slowest Pace

9:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:07:58

57% of race

Time at Steady Pace

59:04

26% of race

Time at Slower Pace

36:54

16% of race

Average Pace: 8:32 /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 mi10:52:0126:218:2926:21
8:29
#17416
10K
6.21 mi11:17:1351:338:1825:12
8:07
#16469
15K
9.32 mi11:42:241:16:448:1425:11
8:06
#16059
20K
12.43 mi12:07:431:42:038:1325:19
8:09
#15653
Half
13.11 mi12:13:111:47:318:125:28
8:01
#15596
25K
15.53 mi12:33:382:07:588:1420:27
8:26
#15601
30K
18.64 mi13:00:522:35:128:2027:14
8:46
#15646
20M
20.00 mi13:13:182:47:388:2312:26
9:09
#15751
21M
21.00 mi13:23:132:57:338:279:55
9:55
#15898
35K
21.75 mi13:29:543:04:148:286:41
8:56
#15945
23M
23.00 mi13:41:143:15:348:3011:20
9:03
#15970
24M
24.00 mi13:49:503:24:108:308:36
8:36
#15923
40K
24.85 mi13:57:253:31:458:317:35
8:52
#15899
25.2M
25.20 mi14:00:383:34:588:323:13
9:20
#15850
Finish
26.22 mi14:09:363:43:568:338:58
8:48
#15916
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi17416111921119215204(Top 57%)10394(Top 68%)10394(Top 507%)
10K6.21 mi3.10 mi16469+94710886+30610886+30615582(Top 59%)10558(Top 70%)10558(Top 515%)
15K9.32 mi3.11 mi16059+41010720+16610720+16615204(Top 57%)10394(Top 68%)10394(Top 507%)
20K12.43 mi3.11 mi15653+40610547+17310547+17314581(Top 55%)10116(Top 67%)10116(Top 493%)
Half13.11 mi0.68 mi15596+5710519+2810519+2814453(Top 54%)10092(Top 66%)10092(Top 492%)
25K15.53 mi2.42 mi15601-510489+3010489+3015786(Top 59%)10460(Top 69%)10460(Top 510%)
30K18.64 mi3.11 mi15646-4510477+1210477+1215852(Top 60%)10415(Top 69%)10415(Top 508%)
20M20.00 mi1.36 mi15751-10510492-1510492-1517287(Top 65%)10932(Top 72%)10932(Top 533%)
21M21.00 mi1.00 mi15898-14710524-3210524-3217696(Top 66%)11092(Top 73%)11092(Top 541%)
35K21.75 mi0.75 mi15945-4710527-310527-317588(Top 66%)10959(Top 72%)10959(Top 534%)
23M23.00 mi1.25 mi15970-2510506+2110506+2116298(Top 61%)10367(Top 68%)10367(Top 505%)
24M24.00 mi1.00 mi15923+4710475+3110475+3115042(Top 57%)9773(Top 64%)9773(Top 476%)
40K24.85 mi0.85 mi15899+2410459+1610459+1615440(Top 58%)9873(Top 65%)9873(Top 481%)
25.2M25.20 mi0.35 mi15850+4910435+2410435+2414280(Top 54%)9373(Top 62%)9373(Top 457%)
Finish26.22 mi1.02 mi15916-6610457-2210457-2217014(Top 64%)10610(Top 70%)10610(Top 517%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 57%
×21stories
+97ft-345ft

Overall

15204

Males

10394

M50-54

10394

5K→10K

3.1 - 6.2 mi

Top 59%
×5stories
+79ft-138ft

Overall

15582

Males

10558

M50-54

10558

10K→15K

6.2 - 9.3 mi

Top 57%
×3stories
+67ft-78ft

Overall

15204

Males

10394

M50-54

10394

15K→20K

9.3 - 12.4 mi

Top 55%
×5stories
+106ft-86ft

Overall

14581

Males

10116

M50-54

10116

20K→Half

12.4 - 13.1 mi

Top 54%
×2stories
+19ft-37ft

Overall

14453

Males

10092

M50-54

10092

Half→25K

13.1 - 15.5 mi

Top 59%
×4stories
+66ft-88ft

Overall

15786

Males

10460

M50-54

10460

25K→30K

15.5 - 18.6 mi

Top 60%
×9stories
+181ft-148ft

Overall

15852

Males

10415

M50-54

10415

30K→20M

18.6 - 20.0 mi

Top 65%
×5stories
+64ft-50ft

Overall

17287

Males

10932

M50-54

10932

20M→21M

20.0 - 21.0 mi

Top 66%
×8stories
+106ft-24ft

Overall

17696

Males

11092

M50-54

11092

21M→35K

21.0 - 21.8 mi

Top 66%
×7stories
+17ft-86ft

Overall

17588

Males

10959

M50-54

10959

35K→23M

21.8 - 23.0 mi

Top 61%
×5stories
+23ft-63ft

Overall

16298

Males

10367

M50-54

10367

23M→24M

23.0 - 24.0 mi

Top 57%
×6stories
+12ft-82ft

Overall

15042

Males

9773

M50-54

9773

24M→40K

24.0 - 24.9 mi

Top 58%
×1story
+6ft-20ft

Overall

15440

Males

9873

M50-54

9873

40K→25.2M

24.9 - 25.2 mi

Top 54%
×1story
+13ft-16ft

Overall

14280

Males

9373

M50-54

9373

25.2M→Finish

25.2 - 26.2 mi

Top 64%
×2stories
+22ft-21ft

Overall

17014

Males

10610

M50-54

10610

Passing Analysis

Category:
Athletes Passed
2755
Passed By
1255
Net Change
+1500
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17416
5K → 10K102275+947#17416#16469
10K → 15K47060+410#16469#16059
15K → 20K43529+406#16059#15653
20K → Half669+57#15653#15596
Half → 25K144149-5#15596#15601
25K → 30K149194-45#15601#15646
30K → 20M56161-105#15646#15751
20M → 21M47194-147#15751#15898
21M → 35K3986-47#15898#15945
35K → 23M77102-25#15945#15970
23M → 24M9447+47#15970#15923
24M → 40K6743+24#15923#15899
40K → 25.2M567+49#15899#15850
25.2M → Finish3399-66#15850#15916
TOTALS27551255+1500
📊

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