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BOSTON MARATHON 2024

Chun Yu Chang

Bib: 23483•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 25550
Gender (Male)
#0 / 14578
Masters (Masters Men)
#0 / 9729
Division (M70-74)
#0 / 195
Race Day Weather
55°/45°F
scattered clouds

⏱️ 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
9:11/mi
28:33
↑ 97↓ 3451.5%
10K· 6.21 mi
9:38/mi
58:30
↑ 79↓ 1380.4%
15K· 9.32 mi
9:49/mi
1:29:00
↑ 67↓ 78
20K· 12.43 mi
10:41/mi
2:02:11
↑ 106↓ 860.1%
Half· 13.11 mi
10:30/mi
2:09:21
↑ 19↓ 370.5%
25K· 15.53 mi
11:18/mi
2:36:45
↑ 66↓ 880.2%
30K· 18.64 mi
12:30/mi
3:15:35
↑ 181↓ 1480.2%
20M
13:51/mi
3:34:24
↑ 64↓ 500.2%
21M
18:14/mi
3:52:38
↑ 106↓ 241.6%
35K· 21.75 mi
13:09/mi
4:02:28
↑ 17↓ 861.7%
23M
12:32/mi
4:18:10
↑ 23↓ 630.6%
24M
11:54/mi
4:30:04
↓ 821.3%
40K· 24.85 mi
12:51/mi
4:41:03
↓ 200.3%
25.2M
14:01/mi
4:45:53
↑ 13↓ 160.2%
Finish· 26.22 mi
12:27/mi
4:58:34
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:09:21
Pace9:52 /mi
2nd Half
Distance13.11 mi
Time2:49:13
Pace12:55 /mi
📊Positive Split: 30.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:28:4528:339:1128:33
9:11
-
10K
6.21 mi11:58:4258:309:2529:57
9:38
+0:27
15K
9.32 mi12:29:121:29:009:3330:30
9:49
+0:11
20K
12.43 mi13:02:232:02:119:5033:11
10:41
+0:52
Half
13.11 mi13:09:332:09:219:527:10
10:30
-0:11
25K
15.53 mi13:36:572:36:4510:0527:24
11:18
+0:48
30K
18.64 mi14:15:473:15:3510:3038:50
12:30
+1:12
20M
20.00 mi14:34:363:34:2410:4318:49
13:51
+1:21
21M
21.00 mi14:52:503:52:3811:0518:14
18:14
+4:23
35K
21.75 mi15:02:404:02:2811:099:50
13:09
-5:05
23M
23.00 mi15:18:224:18:1011:1315:42
12:32
-0:37
24M
24.00 mi15:30:164:30:0411:1511:54
11:54
-0:38
40K
24.85 mi15:41:154:41:0311:1810:59
12:51
+0:57
25.2M
25.20 mi15:46:054:45:5311:214:50
14:01
+1:10
Finish
26.22 mi15:58:464:58:3411:2412:41
12:27
-1:34

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

9:11 /mi

Average Pace

11:24 /mi

Slowest Pace

18:14 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:36:45

53% of race

Time at Steady Pace

1:39:56

33% of race

Time at Slower Pace

41:53

14% of race

Average Pace: 11:23 /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 mi11:28:4528:339:1128:33
9:11
#20761
10K
6.21 mi11:58:4258:309:2529:57
9:38
#21305
15K
9.32 mi12:29:121:29:009:3330:30
9:49
#21368
20K
12.43 mi13:02:232:02:119:5033:11
10:41
#21564
Half
13.11 mi13:09:332:09:219:527:10
10:30
#21614
25K
15.53 mi13:36:572:36:4510:0527:24
11:18
#21707
30K
18.64 mi14:15:473:15:3510:3038:50
12:30
#21942
20M
20.00 mi14:34:363:34:2410:4318:49
13:51
#22156
21M
21.00 mi14:52:503:52:3811:0518:14
18:14
#22607
35K
21.75 mi15:02:404:02:2811:099:50
13:09
#22664
23M
23.00 mi15:18:224:18:1011:1315:42
12:32
#22625
24M
24.00 mi15:30:164:30:0411:1511:54
11:54
#22576
40K
24.85 mi15:41:154:41:0311:1810:59
12:51
#22565
25.2M
25.20 mi15:46:054:45:5311:214:50
14:01
#22560
Finish
26.22 mi15:58:464:58:3411:2412:41
12:27
#22665
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM70-74Seg. OverallSeg. MalesSeg. M70-74
5K3.11 mi3.11 mi20761124371243721477(Top 84%)12843(Top 88%)12843(Top 6586%)
10K6.21 mi3.10 mi21305-54412723-28612723-28621716(Top 85%)12906(Top 89%)12906(Top 6618%)
15K9.32 mi3.11 mi21368-6312755-3212755-3221477(Top 84%)12843(Top 88%)12843(Top 6586%)
20K12.43 mi3.11 mi21564-19612847-9212847-9222043(Top 86%)13065(Top 90%)13065(Top 6700%)
Half13.11 mi0.68 mi21614-5012860-1312860-1322644(Top 89%)13300(Top 91%)13300(Top 6821%)
25K15.53 mi2.42 mi21707-9312899-3912899-3922091(Top 86%)12999(Top 89%)12999(Top 6666%)
30K18.64 mi3.11 mi21942-23512961-6212961-6222682(Top 89%)13145(Top 90%)13145(Top 6741%)
20M20.00 mi1.36 mi22156-21413044-8313044-8323819(Top 93%)13621(Top 93%)13621(Top 6985%)
21M21.00 mi1.00 mi22607-45113237-19313237-19325311(Top 99%)14422(Top 99%)14422(Top 7396%)
35K21.75 mi0.75 mi22664-5713248-1113248-1123397(Top 92%)13336(Top 91%)13336(Top 6839%)
23M23.00 mi1.25 mi22625+3913220+2813220+2821767(Top 85%)12476(Top 86%)12476(Top 6398%)
24M24.00 mi1.00 mi22576+4913172+4813172+4821254(Top 83%)12149(Top 83%)12149(Top 6230%)
40K24.85 mi0.85 mi22565+1113159+1313159+1322013(Top 86%)12499(Top 86%)12499(Top 6410%)
25.2M25.20 mi0.35 mi22560+513151+813151+821606(Top 85%)12290(Top 84%)12290(Top 6303%)
Finish26.22 mi1.02 mi22665-10513200-4913200-4923800(Top 93%)13453(Top 92%)13453(Top 6899%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 84%
×21story building
+97ft-345ft

Overall

21477

Males

12843

M70-74

12843

5K→10K

3.1 - 6.2 mi

Top 85%
×5story building
+79ft-138ft

Overall

21716

Males

12906

M70-74

12906

10K→15K

6.2 - 9.3 mi

Top 84%
×3story building
+67ft-78ft

Overall

21477

Males

12843

M70-74

12843

15K→20K

9.3 - 12.4 mi

Top 86%
×5story building
+106ft-86ft

Overall

22043

Males

13065

M70-74

13065

20K→Half

12.4 - 13.1 mi

Top 89%
×2story building
+19ft-37ft

Overall

22644

Males

13300

M70-74

13300

Half→25K

13.1 - 15.5 mi

Top 86%
×4story building
+66ft-88ft

Overall

22091

Males

12999

M70-74

12999

25K→30K

15.5 - 18.6 mi

Top 89%
×9story building
+181ft-148ft

Overall

22682

Males

13145

M70-74

13145

30K→20M

18.6 - 20.0 mi

Top 93%
×5story building
+64ft-50ft

Overall

23819

Males

13621

M70-74

13621

20M→21M

20.0 - 21.0 mi

Top 99%
×8story building
+106ft-24ft

Overall

25311

Males

14422

M70-74

14422

21M→35K

21.0 - 21.8 mi

Top 92%
×7story building
+17ft-86ft

Overall

23397

Males

13336

M70-74

13336

35K→23M

21.8 - 23.0 mi

Top 85%
×5story building
+23ft-63ft

Overall

21767

Males

12476

M70-74

12476

23M→24M

23.0 - 24.0 mi

Top 83%
×6story building
+12ft-82ft

Overall

21254

Males

12149

M70-74

12149

24M→40K

24.0 - 24.9 mi

Top 86%
×1story
+6ft-20ft

Overall

22013

Males

12499

M70-74

12499

40K→25.2M

24.9 - 25.2 mi

Top 85%
×1story
+13ft-16ft

Overall

21606

Males

12290

M70-74

12290

25.2M→Finish

25.2 - 26.2 mi

Top 93%
×2story building
+22ft-21ft

Overall

23800

Males

13453

M70-74

13453

Passing Analysis

Category:
Athletes Passed
895
Passed By
2799
Net Change
-1904
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20761
5K → 10K84628-544#20761#21305
10K → 15K152215-63#21305#21368
15K → 20K127323-196#21368#21564
20K → Half1969-50#21564#21614
Half → 25K114207-93#21614#21707
25K → 30K98333-235#21707#21942
30K → 20M27241-214#21942#22156
20M → 21M7458-451#22156#22607
21M → 35K2279-57#22607#22664
35K → 23M8647+39#22664#22625
23M → 24M7324+49#22625#22576
24M → 40K4938+11#22576#22565
40K → 25.2M2015+5#22565#22560
25.2M → Finish17122-105#22560#22665
TOTALS8952799-1904
📊

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