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BOSTON MARATHON 2025

Chao-Wen Hsiao

Bib: 8639•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 36%
Gender (Male)
#0 / 16105
Top 49%
Masters (Masters Men)
#0 / 10463
Top 39%
Division (M50-54)
#0 / 1996
Top 40%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:39
Rank: #10255
Start → 5K
22:39 | 7:17/mi
10K· 6.21 mi
45:02
Rank: #9855 (+400)
5K → 10K
22:23 | 7:12/mi
15K· 9.32 mi
1:07:27
Rank: #9631 (+224)
10K → 15K
22:25 | 7:13/mi
20K· 12.43 mi
1:30:15
Rank: #9518 (+113)
15K → 20K
22:48 | 7:20/mi
Half· 13.11 mi
1:35:09
Rank: #9474 (+44)
20K → Half
4:54 | 7:11/mi
25K· 15.53 mi
1:53:17
Rank: #9514 (-40)
Half → 25K
18:08 | 7:29/mi
30K· 18.64 mi
2:19:09
Rank: #10266 (-752)
25K → 30K
25:52 | 8:20/mi
20M
2:30:14
Rank: #10349 (-83)
30K → 20M
11:05 | 8:09/mi
21M
2:39:12
Rank: #10528 (-179)
20M → 21M
8:58 | 8:58/mi
35K· 21.75 mi
2:45:01
Rank: #10505 (+23)
21M → 35K
5:49 | 7:46/mi
23M
2:54:58
Rank: #10391 (+114)
35K → 23M
9:57 | 7:57/mi
24M
3:02:45
Rank: #10348 (+43)
23M → 24M
7:47 | 7:47/mi
40K· 24.85 mi
3:09:35
Rank: #10300 (+48)
24M → 40K
6:50 | 8:00/mi
25.2M
3:12:40
Rank: #10313 (-13)
40K → 25.2M
3:05 | 8:56/mi
Finish· 26.22 mi
3:20:42
Rank: #10345 (-32)
25.2M → Finish
8:02 | 7:53/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:09
Pace7:15 /mi
2nd Half
Distance13.11 mi
Time1:45:33
Pace8:03 /mi
📊Positive Split: 10.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:47:5122:397:1722:39
7:17
-
10K
6.21 mi11:10:1445:027:1522:23
7:12
-0:05
15K
9.32 mi11:32:391:07:277:1422:25
7:13
+0:01
20K
12.43 mi11:55:271:30:157:1622:48
7:20
+0:07
Half
13.11 mi12:00:211:35:097:154:54
7:11
-0:09
25K
15.53 mi12:18:291:53:177:1818:08
7:29
+0:18
30K
18.64 mi12:44:212:19:097:2825:52
8:20
+0:51
20M
20.00 mi12:55:262:30:147:3111:05
8:09
-0:11
21M
21.00 mi13:04:242:39:127:358:58
8:58
+0:49
35K
21.75 mi13:10:132:45:017:355:49
7:46
-1:12
23M
23.00 mi13:20:102:54:587:369:57
7:57
+0:11
24M
24.00 mi13:27:573:02:457:377:47
7:47
-0:10
40K
24.85 mi13:34:473:09:357:386:50
8:00
+0:13
25.2M
25.20 mi13:37:523:12:407:393:05
8:56
+0:56
Finish
26.22 mi13:45:543:20:427:408:02
7:53
-1:03

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

7:11 /mi

Average Pace

7:40 /mi

Slowest Pace

8:58 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:53:17

56% of race

Time at Steady Pace

38:25

19% of race

Time at Slower Pace

49:00

24% of race

Average Pace: 7:39 /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 mi10:47:5122:397:1722:39
7:17
#10255
10K
6.21 mi11:10:1445:027:1522:23
7:12
#9855
15K
9.32 mi11:32:391:07:277:1422:25
7:13
#9631
20K
12.43 mi11:55:271:30:157:1622:48
7:20
#9518
Half
13.11 mi12:00:211:35:097:154:54
7:11
#9474
25K
15.53 mi12:18:291:53:177:1818:08
7:29
#9514
30K
18.64 mi12:44:212:19:097:2825:52
8:20
#10266
20M
20.00 mi12:55:262:30:147:3111:05
8:09
#10349
21M
21.00 mi13:04:242:39:127:358:58
8:58
#10528
35K
21.75 mi13:10:132:45:017:355:49
7:46
#10505
23M
23.00 mi13:20:102:54:587:369:57
7:57
#10391
24M
24.00 mi13:27:573:02:457:377:47
7:47
#10348
40K
24.85 mi13:34:473:09:357:386:50
8:00
#10300
25.2M
25.20 mi13:37:523:12:407:393:05
8:56
#10313
Finish
26.22 mi13:45:543:20:427:408:02
7:53
#10345
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi10255830283029252(Top 33%)7687(Top 48%)7687(Top 385%)
10K6.21 mi3.10 mi9855+4008096+2068096+2069515(Top 33%)7887(Top 49%)7887(Top 395%)
15K9.32 mi3.11 mi9631+2247944+1527944+1529252(Top 33%)7687(Top 48%)7687(Top 385%)
20K12.43 mi3.11 mi9518+1137843+1017843+1019350(Top 33%)7658(Top 48%)7658(Top 384%)
Half13.11 mi0.68 mi9474+447815+287815+288924(Top 31%)7446(Top 46%)7446(Top 373%)
25K15.53 mi2.42 mi9514-407798+177798+179791(Top 34%)7756(Top 48%)7756(Top 389%)
30K18.64 mi3.11 mi10266-7528156-3588156-35813643(Top 48%)9437(Top 59%)9437(Top 473%)
20M20.00 mi1.36 mi10349-838148+88148+811481(Top 40%)8270(Top 51%)8270(Top 414%)
21M21.00 mi1.00 mi10528-1798193-458193-4513275(Top 47%)8982(Top 56%)8982(Top 450%)
35K21.75 mi0.75 mi10505+238166+278166+2710590(Top 37%)7659(Top 48%)7659(Top 384%)
23M23.00 mi1.25 mi10391+1148059+1078059+1079617(Top 34%)7039(Top 44%)7039(Top 353%)
24M24.00 mi1.00 mi10348+438012+478012+479669(Top 34%)7001(Top 43%)7001(Top 351%)
40K24.85 mi0.85 mi10300+487948+647948+6410112(Top 36%)7103(Top 44%)7103(Top 356%)
25.2M25.20 mi0.35 mi10313-137938+107938+1011400(Top 40%)7660(Top 48%)7660(Top 384%)
Finish26.22 mi1.02 mi10345-327926+127926+1212020(Top 42%)8042(Top 50%)8042(Top 403%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 33%
×21stories
+97ft-345ft

Overall

9252

Males

7687

M50-54

7687

5K→10K

3.1 - 6.2 mi

Top 33%
×5stories
+79ft-138ft

Overall

9515

Males

7887

M50-54

7887

10K→15K

6.2 - 9.3 mi

Top 33%
×3stories
+67ft-78ft

Overall

9252

Males

7687

M50-54

7687

15K→20K

9.3 - 12.4 mi

Top 33%
×5stories
+106ft-86ft

Overall

9350

Males

7658

M50-54

7658

20K→Half

12.4 - 13.1 mi

Top 31%
×2stories
+19ft-37ft

Overall

8924

Males

7446

M50-54

7446

Half→25K

13.1 - 15.5 mi

Top 34%
×4stories
+66ft-88ft

Overall

9791

Males

7756

M50-54

7756

25K→30K

15.5 - 18.6 mi

Top 48%
×9stories
+181ft-148ft

Overall

13643

Males

9437

M50-54

9437

30K→20M

18.6 - 20.0 mi

Top 40%
×5stories
+64ft-50ft

Overall

11481

Males

8270

M50-54

8270

20M→21M

20.0 - 21.0 mi

Top 47%
×8stories
+106ft-24ft

Overall

13275

Males

8982

M50-54

8982

21M→35K

21.0 - 21.8 mi

Top 37%
×7stories
+17ft-86ft

Overall

10590

Males

7659

M50-54

7659

35K→23M

21.8 - 23.0 mi

Top 34%
×5stories
+23ft-63ft

Overall

9617

Males

7039

M50-54

7039

23M→24M

23.0 - 24.0 mi

Top 34%
×6stories
+12ft-82ft

Overall

9669

Males

7001

M50-54

7001

24M→40K

24.0 - 24.9 mi

Top 36%
×1story
+6ft-20ft

Overall

10112

Males

7103

M50-54

7103

40K→25.2M

24.9 - 25.2 mi

Top 40%
×1story
+13ft-16ft

Overall

11400

Males

7660

M50-54

7660

25.2M→Finish

25.2 - 26.2 mi

Top 42%
×2stories
+22ft-21ft

Overall

12020

Males

8042

M50-54

8042

Passing Analysis

Category:
Athletes Passed
1950*
Passed By
2038
Net Change
-90
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10255
5K → 10K492*92+400#10255#9855
10K → 15K29571+224#9855#9631
15K → 20K222109+113#9631#9518
20K → Half5915+44#9518#9474
Half → 25K146186-40#9474#9514
25K → 30K72822-752#9514#10266
30K → 20M95178-83#10266#10349
20M → 21M57236-179#10349#10528
21M → 35K6239+23#10528#10505
35K → 23M15743+114#10505#10391
23M → 24M10158+43#10391#10348
24M → 40K10153+48#10348#10300
40K → 25.2M2538-13#10300#10313
25.2M → Finish6698-32#10313#10345
TOTALS1950*2038-90

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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