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BOSTON MARATHON 2025

Wan-Bor Chiu

Bib: 12085•M

NY

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 33%
Gender (Male)
#0 / 16105
Top 46%
Masters (Masters Men)
#0 / 10463
Top 34%
Division (M50-54)
#0 / 1996
Top 34%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:46
Rank: #10625
Start → 5K
22:46 | 7:20/mi
10K· 6.21 mi
45:42
Rank: #10803 (-178)
5K → 10K
22:56 | 7:23/mi
15K· 9.32 mi
1:08:37
Rank: #10726 (+77)
10K → 15K
22:55 | 7:23/mi
20K· 12.43 mi
1:31:28
Rank: #10391 (+335)
15K → 20K
22:51 | 7:21/mi
Half· 13.11 mi
1:36:24
Rank: #10328 (+63)
20K → Half
4:56 | 7:14/mi
25K· 15.53 mi
1:54:23
Rank: #10117 (+211)
Half → 25K
17:59 | 7:25/mi
30K· 18.64 mi
2:18:19
Rank: #9871 (+246)
25K → 30K
23:56 | 7:42/mi
20M
2:28:59
Rank: #9783 (+88)
30K → 20M
10:40 | 7:51/mi
21M
2:37:14
Rank: #9701 (+82)
20M → 21M
8:15 | 8:15/mi
35K· 21.75 mi
2:42:58
Rank: #9683 (+18)
21M → 35K
5:44 | 7:40/mi
23M
2:52:38
Rank: #9546 (+137)
35K → 23M
9:40 | 7:43/mi
24M
3:00:08
Rank: #9418 (+128)
23M → 24M
7:30 | 7:30/mi
40K· 24.85 mi
3:06:46
Rank: #9363 (+55)
24M → 40K
6:38 | 7:45/mi
25.2M
3:09:43
Rank: #9336 (+27)
40K → 25.2M
2:57 | 8:33/mi
Finish· 26.22 mi
3:17:13
Rank: #9272 (+64)
25.2M → Finish
7:30 | 7:22/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:36:24
Pace7:21 /mi
2nd Half
Distance13.11 mi
Time1:40:49
Pace7:41 /mi
📊Positive Split: 4.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:1422:467:2022:46
7:20
-
10K
6.21 mi11:14:1045:427:2122:56
7:23
+0:03
15K
9.32 mi11:37:051:08:377:2222:55
7:23
0:00
20K
12.43 mi11:59:561:31:287:2222:51
7:21
-0:02
Half
13.11 mi12:04:521:36:247:214:56
7:14
-0:07
25K
15.53 mi12:22:511:54:237:2217:59
7:25
+0:11
30K
18.64 mi12:46:472:18:197:2523:56
7:42
+0:17
20M
20.00 mi12:57:272:28:597:2710:40
7:51
+0:09
21M
21.00 mi13:05:422:37:147:298:15
8:15
+0:24
35K
21.75 mi13:11:262:42:587:305:44
7:40
-0:35
23M
23.00 mi13:21:062:52:387:309:40
7:43
+0:03
24M
24.00 mi13:28:363:00:087:307:30
7:30
-0:13
40K
24.85 mi13:35:143:06:467:316:38
7:45
+0:15
25.2M
25.20 mi13:38:113:09:437:322:57
8:33
+0:48
Finish
26.22 mi13:45:413:17:137:327:30
7:22
-1:11

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

7:14 /mi

Average Pace

7:32 /mi

Slowest Pace

8:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:06:01

94% of race

Time at Steady Pace

8:15

4% of race

Time at Slower Pace

2:57

1% of race

Average Pace: 7:31 /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 mi10:51:1422:467:2022:46
7:20
#10625
10K
6.21 mi11:14:1045:427:2122:56
7:23
#10803
15K
9.32 mi11:37:051:08:377:2222:55
7:23
#10726
20K
12.43 mi11:59:561:31:287:2222:51
7:21
#10391
Half
13.11 mi12:04:521:36:247:214:56
7:14
#10328
25K
15.53 mi12:22:511:54:237:2217:59
7:25
#10117
30K
18.64 mi12:46:472:18:197:2523:56
7:42
#9871
20M
20.00 mi12:57:272:28:597:2710:40
7:51
#9783
21M
21.00 mi13:05:422:37:147:298:15
8:15
#9701
35K
21.75 mi13:11:262:42:587:305:44
7:40
#9683
23M
23.00 mi13:21:062:52:387:309:40
7:43
#9546
24M
24.00 mi13:28:363:00:087:307:30
7:30
#9418
40K
24.85 mi13:35:143:06:467:316:38
7:45
#9363
25.2M
25.20 mi13:38:113:09:437:322:57
8:33
#9336
Finish
26.22 mi13:45:413:17:137:327:30
7:22
#9272
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi106258497849710631(Top 37%)8409(Top 52%)8409(Top 421%)
10K6.21 mi3.10 mi10803-1788566-698566-6911001(Top 39%)8664(Top 54%)8664(Top 434%)
15K9.32 mi3.11 mi10726+778504+628504+6210631(Top 37%)8409(Top 52%)8409(Top 421%)
20K12.43 mi3.11 mi10391+3358312+1928312+1929492(Top 33%)7733(Top 48%)7733(Top 387%)
Half13.11 mi0.68 mi10328+638268+448268+449307(Top 33%)7650(Top 48%)7650(Top 383%)
25K15.53 mi2.42 mi10117+2118124+1448124+1449282(Top 33%)7492(Top 47%)7492(Top 375%)
30K18.64 mi3.11 mi9871+2467946+1787946+1789211(Top 32%)7260(Top 45%)7260(Top 364%)
20M20.00 mi1.36 mi9783+887863+837863+839347(Top 33%)7174(Top 45%)7174(Top 359%)
21M21.00 mi1.00 mi9701+827792+717792+718873(Top 31%)6751(Top 42%)6751(Top 338%)
35K21.75 mi0.75 mi9683+187761+317761+319761(Top 34%)7239(Top 45%)7239(Top 363%)
23M23.00 mi1.25 mi9546+1377640+1217640+1218019(Top 28%)6175(Top 38%)6175(Top 309%)
24M24.00 mi1.00 mi9418+1287535+1057535+1057680(Top 27%)5928(Top 37%)5928(Top 297%)
40K24.85 mi0.85 mi9363+557470+657470+658461(Top 30%)6235(Top 39%)6235(Top 312%)
25.2M25.20 mi0.35 mi9336+277434+367434+369060(Top 32%)6479(Top 40%)6479(Top 325%)
Finish26.22 mi1.02 mi9272+647363+717363+718187(Top 29%)6020(Top 37%)6020(Top 302%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 37%
×21stories
+97ft-345ft

Overall

10631

Males

8409

M50-54

8409

5K→10K

3.1 - 6.2 mi

Top 39%
×5stories
+79ft-138ft

Overall

11001

Males

8664

M50-54

8664

10K→15K

6.2 - 9.3 mi

Top 37%
×3stories
+67ft-78ft

Overall

10631

Males

8409

M50-54

8409

15K→20K

9.3 - 12.4 mi

Top 33%
×5stories
+106ft-86ft

Overall

9492

Males

7733

M50-54

7733

20K→Half

12.4 - 13.1 mi

Top 33%
×2stories
+19ft-37ft

Overall

9307

Males

7650

M50-54

7650

Half→25K

13.1 - 15.5 mi

Top 33%
×4stories
+66ft-88ft

Overall

9282

Males

7492

M50-54

7492

25K→30K

15.5 - 18.6 mi

Top 32%
×9stories
+181ft-148ft

Overall

9211

Males

7260

M50-54

7260

30K→20M

18.6 - 20.0 mi

Top 33%
×5stories
+64ft-50ft

Overall

9347

Males

7174

M50-54

7174

20M→21M

20.0 - 21.0 mi

Top 31%
×8stories
+106ft-24ft

Overall

8873

Males

6751

M50-54

6751

21M→35K

21.0 - 21.8 mi

Top 34%
×7stories
+17ft-86ft

Overall

9761

Males

7239

M50-54

7239

35K→23M

21.8 - 23.0 mi

Top 28%
×5stories
+23ft-63ft

Overall

8019

Males

6175

M50-54

6175

23M→24M

23.0 - 24.0 mi

Top 27%
×6stories
+12ft-82ft

Overall

7680

Males

5928

M50-54

5928

24M→40K

24.0 - 24.9 mi

Top 30%
×1story
+6ft-20ft

Overall

8461

Males

6235

M50-54

6235

40K→25.2M

24.9 - 25.2 mi

Top 32%
×1story
+13ft-16ft

Overall

9060

Males

6479

M50-54

6479

25.2M→Finish

25.2 - 26.2 mi

Top 29%
×2stories
+22ft-21ft

Overall

8187

Males

6020

M50-54

6020

Passing Analysis

Category:
Athletes Passed
2343*
Passed By
989
Net Change
+1353
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10625
5K → 10K175353-178#10625#10803
10K → 15K200123+77#10803#10726
15K → 20K36934+335#10726#10391
20K → Half685+63#10391#10328
Half → 25K26251+211#10328#10117
25K → 30K343*97+246#10117#9871
30K → 20M15263+88#9871#9783
20M → 21M12846+82#9783#9701
21M → 35K6749+18#9701#9683
35K → 23M18043+137#9683#9546
23M → 24M14618+128#9546#9418
24M → 40K9742+55#9418#9363
40K → 25.2M5427+27#9363#9336
25.2M → Finish10238+64#9336#9272
TOTALS2343*989+1353

* 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