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BOSTON MARATHON 2025

Weichieh Chung

Bib: 4180•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 39%
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
20:11
Rank: #3819
Start → 5K
20:11 | 6:30/mi
10K· 6.21 mi
40:25
Rank: #3818 (+1)
5K → 10K
20:14 | 6:31/mi
15K· 9.32 mi
1:00:37
Rank: #3722 (+96)
10K → 15K
20:12 | 6:30/mi
20K· 12.43 mi
1:21:39
Rank: #3949 (-227)
15K → 20K
21:02 | 6:46/mi
Half· 13.11 mi
1:26:11
Rank: #3979 (-30)
20K → Half
4:32 | 6:39/mi
25K· 15.53 mi
1:43:05
Rank: #4264 (-285)
Half → 25K
16:54 | 6:58/mi
30K· 18.64 mi
2:05:58
Rank: #4810 (-546)
25K → 30K
22:53 | 7:22/mi
20M
2:17:12
Rank: #5448 (-638)
30K → 20M
11:14 | 8:16/mi
21M
2:27:36
Rank: #6266 (-818)
20M → 21M
10:24 | 10:24/mi
35K· 21.75 mi
2:34:30
Rank: #6658 (-392)
21M → 35K
6:54 | 9:13/mi
23M
2:46:59
Rank: #7531 (-873)
35K → 23M
12:29 | 9:58/mi
24M
2:56:55
Rank: #8273 (-742)
23M → 24M
9:56 | 9:56/mi
40K· 24.85 mi
3:09:14
Rank: #10185 (-1912)
24M → 40K
12:19 | 14:24/mi
25.2M
3:13:38
Rank: #10607 (-422)
40K → 25.2M
4:24 | 12:46/mi
Finish· 26.22 mi
3:23:19
Rank: #11122 (-515)
25.2M → Finish
9:41 | 9:30/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:26:11
Pace6:34 /mi
2nd Half
Distance13.11 mi
Time1:57:08
Pace8:56 /mi
📊Positive Split: 35.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:5420:116:3020:11
6:30
-
10K
6.21 mi10:43:0840:256:3020:14
6:31
+0:01
15K
9.32 mi11:03:201:00:376:3020:12
6:30
-0:01
20K
12.43 mi11:24:221:21:396:3421:02
6:46
+0:16
Half
13.11 mi11:28:541:26:116:344:32
6:39
-0:07
25K
15.53 mi11:45:481:43:056:3816:54
6:58
+0:19
30K
18.64 mi12:08:412:05:586:4522:53
7:22
+0:24
20M
20.00 mi12:19:552:17:126:5211:14
8:16
+0:54
21M
21.00 mi12:30:192:27:367:0210:24
10:24
+2:08
35K
21.75 mi12:37:132:34:307:066:54
9:13
-1:11
23M
23.00 mi12:49:422:46:597:1612:29
9:58
+0:45
24M
24.00 mi12:59:382:56:557:229:56
9:56
-0:02
40K
24.85 mi13:11:573:09:147:3712:19
14:24
+4:28
25.2M
25.20 mi13:16:213:13:387:414:24
12:46
-1:38
Finish
26.22 mi13:26:023:23:197:469:41
9:30
-3:16

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

6:30 /mi

Average Pace

7:46 /mi

Slowest Pace

14:24 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:43:05

51% of race

Time at Steady Pace

41:01

20% of race

Time at Slower Pace

59:13

29% of race

Average Pace: 7:45 /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 mi10:22:5420:116:3020:11
6:30
#3819
10K
6.21 mi10:43:0840:256:3020:14
6:31
#3818
15K
9.32 mi11:03:201:00:376:3020:12
6:30
#3722
20K
12.43 mi11:24:221:21:396:3421:02
6:46
#3949
Half
13.11 mi11:28:541:26:116:344:32
6:39
#3979
25K
15.53 mi11:45:481:43:056:3816:54
6:58
#4264
30K
18.64 mi12:08:412:05:586:4522:53
7:22
#4810
20M
20.00 mi12:19:552:17:126:5211:14
8:16
#5448
21M
21.00 mi12:30:192:27:367:0210:24
10:24
#6266
35K
21.75 mi12:37:132:34:307:066:54
9:13
#6658
23M
23.00 mi12:49:422:46:597:1612:29
9:58
#7531
24M
24.00 mi12:59:382:56:557:229:56
9:56
#8273
40K
24.85 mi13:11:573:09:147:3712:19
14:24
#10185
25.2M
25.20 mi13:16:213:13:387:414:24
12:46
#10607
Finish
26.22 mi13:26:023:23:197:469:41
9:30
#11122
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3819361436143594(Top 13%)3398(Top 21%)3398(Top 60%)
10K6.21 mi3.10 mi3818+13611+33611+33843(Top 14%)3624(Top 23%)3624(Top 64%)
15K9.32 mi3.11 mi3722+963519+923519+923594(Top 13%)3398(Top 21%)3398(Top 60%)
20K12.43 mi3.11 mi3949-2273719-2003719-2005023(Top 18%)4639(Top 29%)4639(Top 82%)
Half13.11 mi0.68 mi3979-303747-283747-284878(Top 17%)4538(Top 28%)4538(Top 80%)
25K15.53 mi2.42 mi4264-2853999-2523999-2526129(Top 22%)5501(Top 34%)5501(Top 98%)
30K18.64 mi3.11 mi4810-5464452-4534452-4536852(Top 24%)5881(Top 37%)5881(Top 104%)
20M20.00 mi1.36 mi5448-6384987-5354987-53512239(Top 43%)8636(Top 54%)8636(Top 153%)
21M21.00 mi1.00 mi6266-8185617-6305617-63019685(Top 69%)11895(Top 74%)11895(Top 211%)
35K21.75 mi0.75 mi6658-3925892-2755892-27519221(Top 68%)11597(Top 72%)11597(Top 206%)
23M23.00 mi1.25 mi7531-8736445-5536445-55320369(Top 72%)12084(Top 75%)12084(Top 214%)
24M24.00 mi1.00 mi8273-7426878-4336878-43321142(Top 74%)12405(Top 77%)12405(Top 220%)
40K24.85 mi0.85 mi10185-19127888-10107888-101027462(Top 97%)15543(Top 97%)15543(Top 275%)
25.2M25.20 mi0.35 mi10607-4228091-2038091-20324643(Top 87%)14078(Top 87%)14078(Top 250%)
Finish26.22 mi1.02 mi11122-5158285-1948285-19421170(Top 75%)12367(Top 77%)12367(Top 219%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 13%
×21stories
+97ft-345ft

Overall

3594

Males

3398

M18-39

3398

5K→10K

3.1 - 6.2 mi

Top 14%
×5stories
+79ft-138ft

Overall

3843

Males

3624

M18-39

3624

10K→15K

6.2 - 9.3 mi

Top 13%
×3stories
+67ft-78ft

Overall

3594

Males

3398

M18-39

3398

15K→20K

9.3 - 12.4 mi

Top 18%
×5stories
+106ft-86ft

Overall

5023

Males

4639

M18-39

4639

20K→Half

12.4 - 13.1 mi

Top 17%
×2stories
+19ft-37ft

Overall

4878

Males

4538

M18-39

4538

Half→25K

13.1 - 15.5 mi

Top 22%
×4stories
+66ft-88ft

Overall

6129

Males

5501

M18-39

5501

25K→30K

15.5 - 18.6 mi

Top 24%
×9stories
+181ft-148ft

Overall

6852

Males

5881

M18-39

5881

30K→20M

18.6 - 20.0 mi

Top 43%
×5stories
+64ft-50ft

Overall

12239

Males

8636

M18-39

8636

20M→21M

20.0 - 21.0 mi

Top 69%
×8stories
+106ft-24ft

Overall

19685

Males

11895

M18-39

11895

21M→35K

21.0 - 21.8 mi

Top 68%
×7stories
+17ft-86ft

Overall

19221

Males

11597

M18-39

11597

35K→23M

21.8 - 23.0 mi

Top 72%
×5stories
+23ft-63ft

Overall

20369

Males

12084

M18-39

12084

23M→24M

23.0 - 24.0 mi

Top 74%
×6stories
+12ft-82ft

Overall

21142

Males

12405

M18-39

12405

24M→40K

24.0 - 24.9 mi

Top 97%
×1story
+6ft-20ft

Overall

27462

Males

15543

M18-39

15543

40K→25.2M

24.9 - 25.2 mi

Top 87%
×1story
+13ft-16ft

Overall

24643

Males

14078

M18-39

14078

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2stories
+22ft-21ft

Overall

21170

Males

12367

M18-39

12367

Passing Analysis

Category:
Athletes Passed
458
Passed By
7759
Net Change
-7303
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3819
5K → 10K134133+1#3819#3818
10K → 15K15963+96#3818#3722
15K → 20K42269-227#3722#3949
20K → Half939-30#3949#3979
Half → 25K28313-285#3979#4264
25K → 30K42588-546#4264#4810
30K → 20M8646-638#4810#5448
20M → 21M4822-818#5448#6266
21M → 35K8400-392#6266#6658
35K → 23M12885-873#6658#7531
23M → 24M5747-742#7531#8273
24M → 40K01910-1912#8273#10185
40K → 25.2M1423-422#10185#10607
25.2M → Finish6521-515#10607#11122
TOTALS4587759-7303
📊

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