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BOSTON MARATHON 2025

Shao-Chi Cheng

Bib: 3168•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Division (M18-39)
#0 / 5642
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:03
Rank: #3506
Start → 5K
20:03 | 6:27/mi
10K· 6.21 mi
40:53
Rank: #4339 (-833)
5K → 10K
20:50 | 6:42/mi
15K· 9.32 mi
1:04:57
Rank: #7557 (-3218)
10K → 15K
24:04 | 7:45/mi
20K· 12.43 mi
1:30:11
Rank: #9473 (-1916)
15K → 20K
25:14 | 8:07/mi
Half· 13.11 mi
1:35:23
Rank: #9656 (-183)
20K → Half
5:12 | 7:37/mi
25K· 15.53 mi
1:56:22
Rank: #11256 (-1600)
Half → 25K
20:59 | 8:39/mi
30K· 18.64 mi
2:25:52
Rank: #13299 (-2043)
25K → 30K
29:30 | 9:30/mi
20M
2:38:57
Rank: #13894 (-595)
30K → 20M
13:05 | 9:38/mi
21M
2:50:18
Rank: #14735 (-841)
20M → 21M
11:21 | 11:21/mi
35K· 21.75 mi
2:57:52
Rank: #15145 (-410)
21M → 35K
7:34 | 10:07/mi
23M
3:12:09
Rank: #16033 (-888)
35K → 23M
14:17 | 11:24/mi
24M
3:22:03
Rank: #16323 (-290)
23M → 24M
9:54 | 9:54/mi
40K· 24.85 mi
3:31:35
Rank: #16824 (-501)
24M → 40K
9:32 | 11:09/mi
25.2M
3:35:18
Rank: #16903 (-79)
40K → 25.2M
3:43 | 10:47/mi
Finish· 26.22 mi
3:43:57
Rank: #16881 (+22)
25.2M → Finish
8:39 | 8:29/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:23
Pace7:17 /mi
2nd Half
Distance13.11 mi
Time2:08:34
Pace9:48 /mi
📊Positive Split: 34.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:2120:036:2720:03
6:27
-
10K
6.21 mi10:42:1140:536:3520:50
6:42
+0:15
15K
9.32 mi11:06:151:04:576:5824:04
7:45
+1:03
20K
12.43 mi11:31:291:30:117:1525:14
8:07
+0:22
Half
13.11 mi11:36:411:35:237:175:12
7:37
-0:30
25K
15.53 mi11:57:401:56:227:2920:59
8:39
+1:02
30K
18.64 mi12:27:102:25:527:4929:30
9:30
+0:51
20M
20.00 mi12:40:152:38:577:5713:05
9:38
+0:08
21M
21.00 mi12:51:362:50:188:0711:21
11:21
+1:43
35K
21.75 mi12:59:102:57:528:117:34
10:07
-1:14
23M
23.00 mi13:13:273:12:098:2114:17
11:24
+1:17
24M
24.00 mi13:23:213:22:038:259:54
9:54
-1:30
40K
24.85 mi13:32:533:31:358:319:32
11:09
+1:15
25.2M
25.20 mi13:36:363:35:188:333:43
10:47
-0:22
Finish
26.22 mi13:45:153:43:578:338:39
8:29
-2:18

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

6:27 /mi

Average Pace

8:33 /mi

Slowest Pace

11:24 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:05:01

56% of race

Time at Steady Pace

1:00:03

27% of race

Time at Slower Pace

38:53

17% 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 mi10:21:2120:036:2720:03
6:27
#3506
10K
6.21 mi10:42:1140:536:3520:50
6:42
#4339
15K
9.32 mi11:06:151:04:576:5824:04
7:45
#7557
20K
12.43 mi11:31:291:30:117:1525:14
8:07
#9473
Half
13.11 mi11:36:411:35:237:175:12
7:37
#9656
25K
15.53 mi11:57:401:56:227:2920:59
8:39
#11256
30K
18.64 mi12:27:102:25:527:4929:30
9:30
#13299
20M
20.00 mi12:40:152:38:577:5713:05
9:38
#13894
21M
21.00 mi12:51:362:50:188:0711:21
11:21
#14735
35K
21.75 mi12:59:102:57:528:117:34
10:07
#15145
23M
23.00 mi13:13:273:12:098:2114:17
11:24
#16033
24M
24.00 mi13:23:213:22:038:259:54
9:54
#16323
40K
24.85 mi13:32:533:31:358:319:32
11:09
#16824
25.2M
25.20 mi13:36:363:35:188:333:43
10:47
#16903
Finish
26.22 mi13:45:153:43:578:338:39
8:29
#16881
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi35063333333313901(Top 49%)9908(Top 62%)9908(Top 176%)
10K6.21 mi3.10 mi4339-8334079-7464079-7465407(Top 19%)4999(Top 31%)4999(Top 89%)
15K9.32 mi3.11 mi7557-32186682-26036682-260313901(Top 49%)9908(Top 62%)9908(Top 176%)
20K12.43 mi3.11 mi9473-19167823-11417823-114115788(Top 56%)10654(Top 66%)10654(Top 189%)
Half13.11 mi0.68 mi9656-1837916-937916-9312756(Top 45%)9379(Top 58%)9379(Top 166%)
25K15.53 mi2.42 mi11256-16008708-7928708-79218098(Top 64%)11566(Top 72%)11566(Top 205%)
30K18.64 mi3.11 mi13299-20439547-8399547-83919912(Top 70%)12243(Top 76%)12243(Top 217%)
20M20.00 mi1.36 mi13894-5959769-2229769-22219692(Top 69%)12012(Top 75%)12012(Top 213%)
21M21.00 mi1.00 mi14735-84110122-35310122-35322259(Top 78%)13084(Top 81%)13084(Top 232%)
35K21.75 mi0.75 mi15145-41010282-16010282-16022196(Top 78%)13000(Top 81%)13000(Top 230%)
23M23.00 mi1.25 mi16033-88810614-33210614-33224089(Top 85%)13883(Top 86%)13883(Top 246%)
24M24.00 mi1.00 mi16323-29010720-10610720-10621042(Top 74%)12358(Top 77%)12358(Top 219%)
40K24.85 mi0.85 mi16824-50110891-17110891-17123444(Top 83%)13466(Top 84%)13466(Top 239%)
25.2M25.20 mi0.35 mi16903-7910912-2110912-2119922(Top 70%)11744(Top 73%)11744(Top 208%)
Finish26.22 mi1.02 mi16881+2210883+2910883+2916127(Top 57%)9993(Top 62%)9993(Top 177%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 49%
×21stories
+97ft-345ft

Overall

13901

Males

9908

M18-39

9908

5K→10K

3.1 - 6.2 mi

Top 19%
×5stories
+79ft-138ft

Overall

5407

Males

4999

M18-39

4999

10K→15K

6.2 - 9.3 mi

Top 49%
×3stories
+67ft-78ft

Overall

13901

Males

9908

M18-39

9908

15K→20K

9.3 - 12.4 mi

Top 56%
×5stories
+106ft-86ft

Overall

15788

Males

10654

M18-39

10654

20K→Half

12.4 - 13.1 mi

Top 45%
×2stories
+19ft-37ft

Overall

12756

Males

9379

M18-39

9379

Half→25K

13.1 - 15.5 mi

Top 64%
×4stories
+66ft-88ft

Overall

18098

Males

11566

M18-39

11566

25K→30K

15.5 - 18.6 mi

Top 70%
×9stories
+181ft-148ft

Overall

19912

Males

12243

M18-39

12243

30K→20M

18.6 - 20.0 mi

Top 69%
×5stories
+64ft-50ft

Overall

19692

Males

12012

M18-39

12012

20M→21M

20.0 - 21.0 mi

Top 78%
×8stories
+106ft-24ft

Overall

22259

Males

13084

M18-39

13084

21M→35K

21.0 - 21.8 mi

Top 78%
×7stories
+17ft-86ft

Overall

22196

Males

13000

M18-39

13000

35K→23M

21.8 - 23.0 mi

Top 85%
×5stories
+23ft-63ft

Overall

24089

Males

13883

M18-39

13883

23M→24M

23.0 - 24.0 mi

Top 74%
×6stories
+12ft-82ft

Overall

21042

Males

12358

M18-39

12358

24M→40K

24.0 - 24.9 mi

Top 83%
×1story
+6ft-20ft

Overall

23444

Males

13466

M18-39

13466

40K→25.2M

24.9 - 25.2 mi

Top 70%
×1story
+13ft-16ft

Overall

19922

Males

11744

M18-39

11744

25.2M→Finish

25.2 - 26.2 mi

Top 57%
×2stories
+22ft-21ft

Overall

16127

Males

9993

M18-39

9993

Passing Analysis

Category:
Athletes Passed
269
Passed By
13642
Net Change
-13375
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3506
5K → 10K8841-833#3506#4339
10K → 15K23220-3218#4339#7557
15K → 20K71923-1916#7557#9473
20K → Half4187-183#9473#9656
Half → 25K191617-1600#9656#11256
25K → 30K182061-2043#11256#13299
30K → 20M37632-595#13299#13894
20M → 21M12853-841#13894#14735
21M → 35K14424-410#14735#15145
35K → 23M17905-888#15145#16033
23M → 24M22312-290#16033#16323
24M → 40K11512-501#16323#16824
40K → 25.2M1594-79#16824#16903
25.2M → Finish8361+22#16903#16881
TOTALS26913642-13375
📊

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