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BOSTON MARATHON 2025

Tat Yiu Chu

Bib: 11489•M

ON

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:42
Rank: #16177
Start → 5K
24:42 | 7:57/mi
10K· 6.21 mi
49:25
Rank: #16119 (+58)
5K → 10K
24:43 | 7:57/mi
15K· 9.32 mi
1:14:17
Rank: #16079 (+40)
10K → 15K
24:52 | 8:00/mi
20K· 12.43 mi
1:39:23
Rank: #15891 (+188)
15K → 20K
25:06 | 8:05/mi
Half· 13.11 mi
1:44:43
Rank: #15829 (+62)
20K → Half
5:20 | 7:49/mi
25K· 15.53 mi
2:04:14
Rank: #15518 (+311)
Half → 25K
19:31 | 8:03/mi
30K· 18.64 mi
2:30:15
Rank: #15216 (+302)
25K → 30K
26:01 | 8:22/mi
20M
2:41:54
Rank: #15093 (+123)
30K → 20M
11:39 | 8:34/mi
21M
2:50:56
Rank: #14955 (+138)
20M → 21M
9:02 | 9:02/mi
35K· 21.75 mi
2:56:45
Rank: #14760 (+195)
21M → 35K
5:49 | 7:46/mi
23M
3:07:27
Rank: #14666 (+94)
35K → 23M
10:42 | 8:33/mi
24M
3:15:36
Rank: #14543 (+123)
23M → 24M
8:09 | 8:09/mi
40K· 24.85 mi
3:22:52
Rank: #14471 (+72)
24M → 40K
7:16 | 8:30/mi
25.2M
3:26:08
Rank: #14455 (+16)
40K → 25.2M
3:16 | 9:28/mi
Finish· 26.22 mi
3:34:38
Rank: #14464 (-9)
25.2M → Finish
8:30 | 8:20/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:43
Pace7:59 /mi
2nd Half
Distance13.11 mi
Time1:49:55
Pace8:23 /mi
📊Positive Split: 5.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:2724:427:5724:42
7:57
-
10K
6.21 mi11:40:1049:257:5724:43
7:57
0:00
15K
9.32 mi12:05:021:14:177:5824:52
8:00
+0:03
20K
12.43 mi12:30:081:39:238:0025:06
8:05
+0:05
Half
13.11 mi12:35:281:44:437:595:20
7:49
-0:16
25K
15.53 mi12:54:592:04:148:0019:31
8:03
+0:14
30K
18.64 mi13:21:002:30:158:0426:01
8:22
+0:19
20M
20.00 mi13:32:392:41:548:0611:39
8:34
+0:12
21M
21.00 mi13:41:412:50:568:089:02
9:02
+0:28
35K
21.75 mi13:47:302:56:458:085:49
7:46
-1:16
23M
23.00 mi13:58:123:07:278:0910:42
8:33
+0:47
24M
24.00 mi14:06:213:15:368:098:09
8:09
-0:24
40K
24.85 mi14:13:373:22:528:107:16
8:30
+0:21
25.2M
25.20 mi14:16:533:26:088:113:16
9:28
+0:58
Finish
26.22 mi14:25:233:34:388:128:30
8:20
-1:08

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

7:46 /mi

Average Pace

8:12 /mi

Slowest Pace

9:28 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

11:09

5% of race

Time at Steady Pace

2:41:34

75% of race

Time at Slower Pace

41:55

20% of race

Average Pace: 8:11 /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 mi11:15:2724:427:5724:42
7:57
#16177
10K
6.21 mi11:40:1049:257:5724:43
7:57
#16119
15K
9.32 mi12:05:021:14:177:5824:52
8:00
#16079
20K
12.43 mi12:30:081:39:238:0025:06
8:05
#15891
Half
13.11 mi12:35:281:44:437:595:20
7:49
#15829
25K
15.53 mi12:54:592:04:148:0019:31
8:03
#15518
30K
18.64 mi13:21:002:30:158:0426:01
8:22
#15216
20M
20.00 mi13:32:392:41:548:0611:39
8:34
#15093
21M
21.00 mi13:41:412:50:568:089:02
9:02
#14955
35K
21.75 mi13:47:302:56:458:085:49
7:46
#14760
23M
23.00 mi13:58:123:07:278:0910:42
8:33
#14666
24M
24.00 mi14:06:213:15:368:098:09
8:09
#14543
40K
24.85 mi14:13:373:22:528:107:16
8:30
#14471
25.2M
25.20 mi14:16:533:26:088:113:16
9:28
#14455
Finish
26.22 mi14:25:233:34:388:128:30
8:20
#14464
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi16177108761087616064(Top 57%)10837(Top 67%)10837(Top 454%)
10K6.21 mi3.10 mi16119+5810858+1810858+1816096(Top 57%)10868(Top 67%)10868(Top 455%)
15K9.32 mi3.11 mi16079+4010847+1110847+1116064(Top 57%)10837(Top 67%)10837(Top 454%)
20K12.43 mi3.11 mi15891+18810756+9110756+9115480(Top 54%)10532(Top 65%)10532(Top 441%)
Half13.11 mi0.68 mi15829+6210733+2310733+2314357(Top 51%)10050(Top 62%)10050(Top 421%)
25K15.53 mi2.42 mi15518+31110573+16010573+16014257(Top 50%)9875(Top 61%)9875(Top 414%)
30K18.64 mi3.11 mi15216+30210387+18610387+18613972(Top 49%)9589(Top 60%)9589(Top 402%)
20M20.00 mi1.36 mi15093+12310294+9310294+9314232(Top 50%)9565(Top 59%)9565(Top 401%)
21M21.00 mi1.00 mi14955+13810216+7810216+7813699(Top 48%)9198(Top 57%)9198(Top 385%)
35K21.75 mi0.75 mi14760+19510113+10310113+10310624(Top 37%)7693(Top 48%)7693(Top 322%)
23M23.00 mi1.25 mi14666+9410038+7510038+7513585(Top 48%)8977(Top 56%)8977(Top 376%)
24M24.00 mi1.00 mi14543+1239964+749964+7412236(Top 43%)8292(Top 51%)8292(Top 348%)
40K24.85 mi0.85 mi14471+729900+649900+6413406(Top 47%)8717(Top 54%)8717(Top 365%)
25.2M25.20 mi0.35 mi14455+169877+239877+2314396(Top 51%)9125(Top 57%)9125(Top 382%)
Finish26.22 mi1.02 mi14464-99850+279850+2715167(Top 53%)9551(Top 59%)9551(Top 400%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 57%
×21stories
+97ft-345ft

Overall

16064

Males

10837

M45-49

10837

5K→10K

3.1 - 6.2 mi

Top 57%
×5stories
+79ft-138ft

Overall

16096

Males

10868

M45-49

10868

10K→15K

6.2 - 9.3 mi

Top 57%
×3stories
+67ft-78ft

Overall

16064

Males

10837

M45-49

10837

15K→20K

9.3 - 12.4 mi

Top 54%
×5stories
+106ft-86ft

Overall

15480

Males

10532

M45-49

10532

20K→Half

12.4 - 13.1 mi

Top 51%
×2stories
+19ft-37ft

Overall

14357

Males

10050

M45-49

10050

Half→25K

13.1 - 15.5 mi

Top 50%
×4stories
+66ft-88ft

Overall

14257

Males

9875

M45-49

9875

25K→30K

15.5 - 18.6 mi

Top 49%
×9stories
+181ft-148ft

Overall

13972

Males

9589

M45-49

9589

30K→20M

18.6 - 20.0 mi

Top 50%
×5stories
+64ft-50ft

Overall

14232

Males

9565

M45-49

9565

20M→21M

20.0 - 21.0 mi

Top 48%
×8stories
+106ft-24ft

Overall

13699

Males

9198

M45-49

9198

21M→35K

21.0 - 21.8 mi

Top 37%
×7stories
+17ft-86ft

Overall

10624

Males

7693

M45-49

7693

35K→23M

21.8 - 23.0 mi

Top 48%
×5stories
+23ft-63ft

Overall

13585

Males

8977

M45-49

8977

23M→24M

23.0 - 24.0 mi

Top 43%
×6stories
+12ft-82ft

Overall

12236

Males

8292

M45-49

8292

24M→40K

24.0 - 24.9 mi

Top 47%
×1story
+6ft-20ft

Overall

13406

Males

8717

M45-49

8717

40K→25.2M

24.9 - 25.2 mi

Top 51%
×1story
+13ft-16ft

Overall

14396

Males

9125

M45-49

9125

25.2M→Finish

25.2 - 26.2 mi

Top 53%
×2stories
+22ft-21ft

Overall

15167

Males

9551

M45-49

9551

Passing Analysis

Category:
Athletes Passed
2724
Passed By
1011
Net Change
+1713
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16177
5K → 10K327269+58#16177#16119
10K → 15K230190+40#16119#16079
15K → 20K28597+188#16079#15891
20K → Half7513+62#15891#15829
Half → 25K34332+311#15829#15518
25K → 30K39088+302#15518#15216
30K → 20M18461+123#15216#15093
20M → 21M18345+138#15093#14955
21M → 35K1950+195#14955#14760
35K → 23M14753+94#14760#14666
23M → 24M14320+123#14666#14543
24M → 40K10634+72#14543#14471
40K → 25.2M3923+16#14471#14455
25.2M → Finish7786-9#14455#14464
TOTALS27241011+1713
📊

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