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BOSTON MARATHON 2025

Ka Kui Chan

Bib: 674•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 2%
Gender (Male)
#0 / 16105
Top 4%
Division (M18-39)
#0 / 5642
Top 10%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
16:48
Rank: #130
Start → 5K
16:48 | 5:24/mi
10K· 6.21 mi
34:24
Rank: #248 (-118)
5K → 10K
17:36 | 5:40/mi
15K· 9.32 mi
52:32
Rank: #317 (-69)
10K → 15K
18:08 | 5:50/mi
20K· 12.43 mi
1:11:48
Rank: #494 (-177)
15K → 20K
19:16 | 6:12/mi
Half· 13.11 mi
1:15:45
Rank: #495 (-1)
20K → Half
3:57 | 5:47/mi
25K· 15.53 mi
1:30:44
Rank: #569 (-74)
Half → 25K
14:59 | 6:11/mi
30K· 18.64 mi
1:50:08
Rank: #609 (-40)
25K → 30K
19:24 | 6:15/mi
20M
1:59:06
Rank: #672 (-63)
30K → 20M
8:58 | 6:36/mi
21M
2:05:33
Rank: #648 (+24)
20M → 21M
6:27 | 6:27/mi
35K· 21.75 mi
2:09:59
Rank: #633 (+15)
21M → 35K
4:26 | 5:56/mi
23M
2:18:13
Rank: #671 (-38)
35K → 23M
8:14 | 6:35/mi
24M
2:24:12
Rank: #649 (+22)
23M → 24M
5:59 | 5:59/mi
40K· 24.85 mi
2:30:08
Rank: #691 (-42)
24M → 40K
5:56 | 6:56/mi
25.2M
2:32:44
Rank: #701 (-10)
40K → 25.2M
2:36 | 7:32/mi
Finish· 26.22 mi
2:38:35
Rank: #684 (+17)
25.2M → Finish
5:51 | 5:44/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:15:45
Pace5:47 /mi
2nd Half
Distance13.11 mi
Time1:22:50
Pace6:19 /mi
📊Positive Split: 9.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:16:5516:485:2416:48
5:24
-
10K
6.21 mi10:34:3134:245:3217:36
5:40
+0:16
15K
9.32 mi10:52:3952:325:3818:08
5:50
+0:10
20K
12.43 mi11:11:551:11:485:4719:16
6:12
+0:22
Half
13.11 mi11:15:521:15:455:473:57
5:47
-0:25
25K
15.53 mi11:30:511:30:445:5014:59
6:11
+0:24
30K
18.64 mi11:50:151:50:085:5419:24
6:15
+0:04
20M
20.00 mi11:59:131:59:065:578:58
6:36
+0:21
21M
21.00 mi12:05:402:05:335:596:27
6:27
-0:09
35K
21.75 mi12:10:062:09:595:594:26
5:56
-0:31
23M
23.00 mi12:18:202:18:136:018:14
6:35
+0:39
24M
24.00 mi12:24:192:24:126:015:59
5:59
-0:36
40K
24.85 mi12:30:152:30:086:025:56
6:56
+0:57
25.2M
25.20 mi12:32:512:32:446:042:36
7:32
+0:36
Finish
26.22 mi12:38:422:38:356:035:51
5:44
-1:48

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

5:24 /mi

Average Pace

6:03 /mi

Slowest Pace

7:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:02:20

39% of race

Time at Steady Pace

1:04:04

40% of race

Time at Slower Pace

32:11

20% of race

Average Pace: 6:03 /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 mi10:16:5516:485:2416:48
5:24
#130
10K
6.21 mi10:34:3134:245:3217:36
5:40
#248
15K
9.32 mi10:52:3952:325:3818:08
5:50
#317
20K
12.43 mi11:11:551:11:485:4719:16
6:12
#494
Half
13.11 mi11:15:521:15:455:473:57
5:47
#495
25K
15.53 mi11:30:511:30:445:5014:59
6:11
#569
30K
18.64 mi11:50:151:50:085:5419:24
6:15
#609
20M
20.00 mi11:59:131:59:065:578:58
6:36
#672
21M
21.00 mi12:05:402:05:335:596:27
6:27
#648
35K
21.75 mi12:10:062:09:595:594:26
5:56
#633
23M
23.00 mi12:18:202:18:136:018:14
6:35
#671
24M
24.00 mi12:24:192:24:126:015:59
5:59
#649
40K
24.85 mi12:30:152:30:086:025:56
6:56
#691
25.2M
25.20 mi12:32:512:32:446:042:36
7:32
#701
Finish
26.22 mi12:38:422:38:356:035:51
5:44
#684
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi130129129603(Top 2%)561(Top 3%)561(Top 10%)
10K6.21 mi3.10 mi248-118219-90219-90387(Top 1%)357(Top 2%)357(Top 6%)
15K9.32 mi3.11 mi317-69288-69288-69603(Top 2%)561(Top 3%)561(Top 10%)
20K12.43 mi3.11 mi494-177458-170458-1701580(Top 6%)1500(Top 9%)1500(Top 27%)
Half13.11 mi0.68 mi495-1459-1459-1568(Top 2%)534(Top 3%)534(Top 9%)
25K15.53 mi2.42 mi569-74524-65524-651356(Top 5%)1285(Top 8%)1285(Top 23%)
30K18.64 mi3.11 mi609-40562-38562-381040(Top 4%)977(Top 6%)977(Top 17%)
20M20.00 mi1.36 mi672-63625-63625-631987(Top 7%)1877(Top 12%)1877(Top 33%)
21M21.00 mi1.00 mi648+24601+24601+24586(Top 2%)550(Top 3%)550(Top 10%)
35K21.75 mi0.75 mi633+15586+15586+15571(Top 2%)530(Top 3%)530(Top 9%)
23M23.00 mi1.25 mi671-38623-37623-371713(Top 6%)1601(Top 10%)1601(Top 28%)
24M24.00 mi1.00 mi649+22601+22601+22549(Top 2%)513(Top 3%)513(Top 9%)
40K24.85 mi0.85 mi691-42642-41642-413515(Top 12%)3111(Top 19%)3111(Top 55%)
25.2M25.20 mi0.35 mi701-10652-10652-103482(Top 12%)3026(Top 19%)3026(Top 54%)
Finish26.22 mi1.02 mi684+17635+17635+17417(Top 1%)391(Top 2%)391(Top 7%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 2%
×21stories
+97ft-345ft

Overall

603

Males

561

M18-39

561

5K→10K

3.1 - 6.2 mi

Top 1%
×5stories
+79ft-138ft

Overall

387

Males

357

M18-39

357

10K→15K

6.2 - 9.3 mi

Top 2%
×3stories
+67ft-78ft

Overall

603

Males

561

M18-39

561

15K→20K

9.3 - 12.4 mi

Top 6%
×5stories
+106ft-86ft

Overall

1580

Males

1500

M18-39

1500

20K→Half

12.4 - 13.1 mi

Top 2%
×2stories
+19ft-37ft

Overall

568

Males

534

M18-39

534

Half→25K

13.1 - 15.5 mi

Top 5%
×4stories
+66ft-88ft

Overall

1356

Males

1285

M18-39

1285

25K→30K

15.5 - 18.6 mi

Top 4%
×9stories
+181ft-148ft

Overall

1040

Males

977

M18-39

977

30K→20M

18.6 - 20.0 mi

Top 7%
×5stories
+64ft-50ft

Overall

1987

Males

1877

M18-39

1877

20M→21M

20.0 - 21.0 mi

Top 2%
×8stories
+106ft-24ft

Overall

586

Males

550

M18-39

550

21M→35K

21.0 - 21.8 mi

Top 2%
×7stories
+17ft-86ft

Overall

571

Males

530

M18-39

530

35K→23M

21.8 - 23.0 mi

Top 6%
×5stories
+23ft-63ft

Overall

1713

Males

1601

M18-39

1601

23M→24M

23.0 - 24.0 mi

Top 2%
×6stories
+12ft-82ft

Overall

549

Males

513

M18-39

513

24M→40K

24.0 - 24.9 mi

Top 12%
×1story
+6ft-20ft

Overall

3515

Males

3111

M18-39

3111

40K→25.2M

24.9 - 25.2 mi

Top 12%
×1story
+13ft-16ft

Overall

3482

Males

3026

M18-39

3026

25.2M→Finish

25.2 - 26.2 mi

Top 1%
×2stories
+22ft-21ft

Overall

417

Males

391

M18-39

391

Passing Analysis

Category:
Athletes Passed
131
Passed By
685
Net Change
-554
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#130
5K → 10K0118-118#130#248
10K → 15K170-69#248#317
15K → 20K0177-177#317#494
20K → Half23-1#494#495
Half → 25K579-74#495#569
25K → 30K2060-40#569#609
30K → 20M366-63#609#672
20M → 21M306+24#672#648
21M → 35K172+15#648#633
35K → 23M442-38#633#671
23M → 24M220+22#671#649
24M → 40K446-42#649#691
40K → 25.2M414-10#691#701
25.2M → Finish192+17#701#684
TOTALS131685-554
📊

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