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BOSTON MARATHON 2025

Chih-Wen Su

Bib: 7882•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 20%
Gender (Male)
#0 / 16105
Top 31%
Masters (Masters Men)
#0 / 10463
Top 17%
Division (M45-49)
#0 / 2386
Top 23%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:59
Rank: #5947
Start → 5K
20:59 | 6:45/mi
10K· 6.21 mi
42:12
Rank: #6223 (-276)
5K → 10K
21:13 | 6:50/mi
15K· 9.32 mi
1:03:41
Rank: #6501 (-278)
10K → 15K
21:29 | 6:55/mi
20K· 12.43 mi
1:25:13
Rank: #6469 (+32)
15K → 20K
21:32 | 6:56/mi
Half· 13.11 mi
1:29:50
Rank: #6434 (+35)
20K → Half
4:37 | 6:46/mi
25K· 15.53 mi
1:46:52
Rank: #6409 (+25)
Half → 25K
17:02 | 7:02/mi
30K· 18.64 mi
2:09:06
Rank: #6149 (+260)
25K → 30K
22:14 | 7:09/mi
20M
2:18:58
Rank: #6053 (+96)
30K → 20M
9:52 | 7:16/mi
21M
2:26:36
Rank: #5966 (+87)
20M → 21M
7:38 | 7:38/mi
35K· 21.75 mi
2:31:50
Rank: #5907 (+59)
21M → 35K
5:14 | 7:00/mi
23M
2:40:53
Rank: #5776 (+131)
35K → 23M
9:03 | 7:14/mi
24M
2:48:00
Rank: #5696 (+80)
23M → 24M
7:07 | 7:07/mi
40K· 24.85 mi
2:54:18
Rank: #5644 (+52)
24M → 40K
6:18 | 7:22/mi
25.2M
2:57:05
Rank: #5610 (+34)
40K → 25.2M
2:47 | 8:04/mi
Finish· 26.22 mi
3:04:23
Rank: #5608 (+2)
25.2M → Finish
7:18 | 7:10/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:29:50
Pace6:51 /mi
2nd Half
Distance13.11 mi
Time1:34:33
Pace7:13 /mi
📊Positive Split: 5.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:28:3820:596:4520:59
6:45
-
10K
6.21 mi10:49:5142:126:4721:13
6:50
+0:05
15K
9.32 mi11:11:201:03:416:5021:29
6:55
+0:05
20K
12.43 mi11:32:521:25:136:5121:32
6:56
+0:01
Half
13.11 mi11:37:291:29:506:514:37
6:46
-0:10
25K
15.53 mi11:54:311:46:526:5317:02
7:02
+0:16
30K
18.64 mi12:16:452:09:066:5622:14
7:09
+0:07
20M
20.00 mi12:26:372:18:586:579:52
7:16
+0:07
21M
21.00 mi12:34:152:26:366:597:38
7:38
+0:22
35K
21.75 mi12:39:292:31:506:595:14
7:00
-0:38
23M
23.00 mi12:48:322:40:537:009:03
7:14
+0:14
24M
24.00 mi12:55:392:48:007:007:07
7:07
-0:07
40K
24.85 mi13:01:572:54:187:016:18
7:22
+0:15
25.2M
25.20 mi13:04:442:57:057:022:47
8:04
+0:42
Finish
26.22 mi13:12:023:04:237:027:18
7:10
-0:54

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

6:45 /mi

Average Pace

7:02 /mi

Slowest Pace

8:04 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:53:58

94% of race

Time at Steady Pace

7:38

4% of race

Time at Slower Pace

2:47

2% of race

Average Pace: 7:02 /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 mi10:28:3820:596:4520:59
6:45
#5947
10K
6.21 mi10:49:5142:126:4721:13
6:50
#6223
15K
9.32 mi11:11:201:03:416:5021:29
6:55
#6501
20K
12.43 mi11:32:521:25:136:5121:32
6:56
#6469
Half
13.11 mi11:37:291:29:506:514:37
6:46
#6434
25K
15.53 mi11:54:311:46:526:5317:02
7:02
#6409
30K
18.64 mi12:16:452:09:066:5622:14
7:09
#6149
20M
20.00 mi12:26:372:18:586:579:52
7:16
#6053
21M
21.00 mi12:34:152:26:366:597:38
7:38
#5966
35K
21.75 mi12:39:292:31:506:595:14
7:00
#5907
23M
23.00 mi12:48:322:40:537:009:03
7:14
#5776
24M
24.00 mi12:55:392:48:007:007:07
7:07
#5696
40K
24.85 mi13:01:572:54:187:016:18
7:22
#5644
25.2M
25.20 mi13:04:442:57:057:022:47
8:04
#5610
Finish
26.22 mi13:12:023:04:237:027:18
7:10
#5608
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi5947547354737046(Top 25%)6281(Top 39%)6281(Top 263%)
10K6.21 mi3.10 mi6223-2765699-2265699-2266693(Top 24%)6038(Top 37%)6038(Top 253%)
15K9.32 mi3.11 mi6501-2785890-1915890-1917046(Top 25%)6281(Top 39%)6281(Top 263%)
20K12.43 mi3.11 mi6469+325856+345856+346427(Top 23%)5767(Top 36%)5767(Top 242%)
Half13.11 mi0.68 mi6434+355826+305826+305859(Top 21%)5346(Top 33%)5346(Top 224%)
25K15.53 mi2.42 mi6409+255794+325794+326475(Top 23%)5750(Top 36%)5750(Top 241%)
30K18.64 mi3.11 mi6149+2605547+2475547+2475660(Top 20%)5063(Top 31%)5063(Top 212%)
20M20.00 mi1.36 mi6053+965461+865461+865557(Top 20%)4882(Top 30%)4882(Top 205%)
21M21.00 mi1.00 mi5966+875380+815380+815306(Top 19%)4605(Top 29%)4605(Top 193%)
35K21.75 mi0.75 mi5907+595331+495331+495340(Top 19%)4622(Top 29%)4622(Top 194%)
23M23.00 mi1.25 mi5776+1315207+1245207+1245050(Top 18%)4357(Top 27%)4357(Top 183%)
24M24.00 mi1.00 mi5696+805128+795128+795307(Top 19%)4474(Top 28%)4474(Top 188%)
40K24.85 mi0.85 mi5644+525080+485080+486010(Top 21%)4856(Top 30%)4856(Top 204%)
25.2M25.20 mi0.35 mi5610+345039+415039+416281(Top 22%)4914(Top 31%)4914(Top 206%)
Finish26.22 mi1.02 mi5608+25025+145025+146791(Top 24%)5201(Top 32%)5201(Top 218%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 25%
×21stories
+97ft-345ft

Overall

7046

Males

6281

M45-49

6281

5K→10K

3.1 - 6.2 mi

Top 24%
×5stories
+79ft-138ft

Overall

6693

Males

6038

M45-49

6038

10K→15K

6.2 - 9.3 mi

Top 25%
×3stories
+67ft-78ft

Overall

7046

Males

6281

M45-49

6281

15K→20K

9.3 - 12.4 mi

Top 23%
×5stories
+106ft-86ft

Overall

6427

Males

5767

M45-49

5767

20K→Half

12.4 - 13.1 mi

Top 21%
×2stories
+19ft-37ft

Overall

5859

Males

5346

M45-49

5346

Half→25K

13.1 - 15.5 mi

Top 23%
×4stories
+66ft-88ft

Overall

6475

Males

5750

M45-49

5750

25K→30K

15.5 - 18.6 mi

Top 20%
×9stories
+181ft-148ft

Overall

5660

Males

5063

M45-49

5063

30K→20M

18.6 - 20.0 mi

Top 20%
×5stories
+64ft-50ft

Overall

5557

Males

4882

M45-49

4882

20M→21M

20.0 - 21.0 mi

Top 19%
×8stories
+106ft-24ft

Overall

5306

Males

4605

M45-49

4605

21M→35K

21.0 - 21.8 mi

Top 19%
×7stories
+17ft-86ft

Overall

5340

Males

4622

M45-49

4622

35K→23M

21.8 - 23.0 mi

Top 18%
×5stories
+23ft-63ft

Overall

5050

Males

4357

M45-49

4357

23M→24M

23.0 - 24.0 mi

Top 19%
×6stories
+12ft-82ft

Overall

5307

Males

4474

M45-49

4474

24M→40K

24.0 - 24.9 mi

Top 21%
×1story
+6ft-20ft

Overall

6010

Males

4856

M45-49

4856

40K→25.2M

24.9 - 25.2 mi

Top 22%
×1story
+13ft-16ft

Overall

6281

Males

4914

M45-49

4914

25.2M→Finish

25.2 - 26.2 mi

Top 24%
×2stories
+22ft-21ft

Overall

6791

Males

5201

M45-49

5201

Passing Analysis

Category:
Athletes Passed
1537
Passed By
1198
Net Change
+339
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5947
5K → 10K88364-276#5947#6223
10K → 15K79357-278#6223#6501
15K → 20K152120+32#6501#6469
20K → Half438+35#6469#6434
Half → 25K139114+25#6434#6409
25K → 30K30848+260#6409#6149
30K → 20M11822+96#6149#6053
20M → 21M10821+87#6053#5966
21M → 35K7718+59#5966#5907
35K → 23M15524+131#5907#5776
23M → 24M9818+80#5776#5696
24M → 40K7725+52#5696#5644
40K → 25.2M4915+34#5644#5610
25.2M → Finish4644+2#5610#5608
TOTALS15371198+339
📊

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