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BOSTON MARATHON 2025

Kang Ngai

Bib: 392•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 0.8%
Gender (Male)
#0 / 16105
Top 1%
Division (M18-39)
#0 / 5642
Top 3%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
16:58
Rank: #189
Start → 5K
16:58 | 5:28/mi
10K· 6.21 mi
34:13
Rank: #213 (-24)
5K → 10K
17:15 | 5:33/mi
15K· 9.32 mi
51:56
Rank: #255 (-42)
10K → 15K
17:43 | 5:42/mi
20K· 12.43 mi
1:09:43
Rank: #268 (-13)
15K → 20K
17:47 | 5:43/mi
Half· 13.11 mi
1:13:33
Rank: #268
20K → Half
3:50 | 5:37/mi
25K· 15.53 mi
1:27:09
Rank: #244 (+24)
Half → 25K
13:36 | 5:37/mi
30K· 18.64 mi
1:45:33
Rank: #261 (-17)
25K → 30K
18:24 | 5:55/mi
20M
1:53:25
Rank: #245 (+16)
30K → 20M
7:52 | 5:47/mi
21M
1:59:45
Rank: #244 (+1)
20M → 21M
6:20 | 6:20/mi
35K· 21.75 mi
2:04:09
Rank: #244
21M → 35K
4:24 | 5:53/mi
23M
2:11:41
Rank: #245 (-1)
35K → 23M
7:32 | 6:01/mi
24M
2:17:39
Rank: #243 (+2)
23M → 24M
5:58 | 5:58/mi
40K· 24.85 mi
2:22:45
Rank: #244 (-1)
24M → 40K
5:06 | 5:58/mi
25.2M
2:24:53
Rank: #237 (+7)
40K → 25.2M
2:08 | 6:11/mi
Finish· 26.22 mi
2:30:35
Rank: #232 (+5)
25.2M → Finish
5:42 | 5:36/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:13:33
Pace5:37 /mi
2nd Half
Distance13.11 mi
Time1:17:02
Pace5:53 /mi
📊Positive Split: 4.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:17:0216:585:2816:58
5:28
-
10K
6.21 mi10:34:1734:135:3017:15
5:33
+0:05
15K
9.32 mi10:52:0051:565:3417:43
5:42
+0:09
20K
12.43 mi11:09:471:09:435:3717:47
5:43
+0:01
Half
13.11 mi11:13:371:13:335:373:50
5:37
-0:06
25K
15.53 mi11:27:131:27:095:3713:36
5:37
0:00
30K
18.64 mi11:45:371:45:335:4018:24
5:55
+0:18
20M
20.00 mi11:53:291:53:255:407:52
5:47
-0:08
21M
21.00 mi11:59:491:59:455:426:20
6:20
+0:33
35K
21.75 mi12:04:132:04:095:434:24
5:53
-0:27
23M
23.00 mi12:11:452:11:415:447:32
6:01
+0:08
24M
24.00 mi12:17:432:17:395:445:58
5:58
-0:03
40K
24.85 mi12:22:492:22:455:455:06
5:58
0:00
25.2M
25.20 mi12:24:572:24:535:452:08
6:11
+0:13
Finish
26.22 mi12:30:392:30:355:455:42
5:36
-0:35

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

5:28 /mi

Average Pace

5:45 /mi

Slowest Pace

6:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:14:35

89% of race

Time at Steady Pace

16:00

11% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 5:45 /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 mi10:17:0216:585:2816:58
5:28
#189
10K
6.21 mi10:34:1734:135:3017:15
5:33
#213
15K
9.32 mi10:52:0051:565:3417:43
5:42
#255
20K
12.43 mi11:09:471:09:435:3717:47
5:43
#268
Half
13.11 mi11:13:371:13:335:373:50
5:37
#268
25K
15.53 mi11:27:131:27:095:3713:36
5:37
#244
30K
18.64 mi11:45:371:45:335:4018:24
5:55
#261
20M
20.00 mi11:53:291:53:255:407:52
5:47
#245
21M
21.00 mi11:59:491:59:455:426:20
6:20
#244
35K
21.75 mi12:04:132:04:095:434:24
5:53
#244
23M
23.00 mi12:11:452:11:415:447:32
6:01
#245
24M
24.00 mi12:17:432:17:395:445:58
5:58
#243
40K
24.85 mi12:22:492:22:455:455:06
5:58
#244
25.2M
25.20 mi12:24:572:24:535:452:08
6:11
#237
Finish
26.22 mi12:30:392:30:355:455:42
5:36
#232
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi189164164387(Top 1%)357(Top 2%)357(Top 6%)
10K6.21 mi3.10 mi213-24187-23187-23249(Top 0.9%)220(Top 1%)220(Top 4%)
15K9.32 mi3.11 mi255-42227-40227-40387(Top 1%)357(Top 2%)357(Top 6%)
20K12.43 mi3.11 mi268-13240-13240-13345(Top 1%)316(Top 2%)316(Top 6%)
Half13.11 mi0.68 mi268240240318(Top 1%)292(Top 2%)292(Top 5%)
25K15.53 mi2.42 mi244+24218+22218+22199(Top 0.7%)176(Top 1%)176(Top 3%)
30K18.64 mi3.11 mi261-17235-17235-17385(Top 1%)356(Top 2%)356(Top 6%)
20M20.00 mi1.36 mi245+16221+14221+14173(Top 0.6%)157(Top 1.0%)157(Top 3%)
21M21.00 mi1.00 mi244+1221221397(Top 1%)373(Top 2%)373(Top 7%)
35K21.75 mi0.75 mi244221221489(Top 2%)454(Top 3%)454(Top 8%)
23M23.00 mi1.25 mi245-1222-1222-1357(Top 1%)335(Top 2%)335(Top 6%)
24M24.00 mi1.00 mi243+2220+2220+2504(Top 2%)468(Top 3%)468(Top 8%)
40K24.85 mi0.85 mi244-1222-2222-2342(Top 1%)316(Top 2%)316(Top 6%)
25.2M25.20 mi0.35 mi237+7215+7215+7144(Top 0.5%)136(Top 0.8%)136(Top 2%)
Finish26.22 mi1.02 mi232+5210+5210+5220(Top 0.8%)207(Top 1%)207(Top 4%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 1%
×21stories
+97ft-345ft

Overall

387

Males

357

M18-39

357

5K→10K

3.1 - 6.2 mi

Top 0.9%
×5stories
+79ft-138ft

Overall

249

Males

220

M18-39

220

10K→15K

6.2 - 9.3 mi

Top 1%
×3stories
+67ft-78ft

Overall

387

Males

357

M18-39

357

15K→20K

9.3 - 12.4 mi

Top 1%
×5stories
+106ft-86ft

Overall

345

Males

316

M18-39

316

20K→Half

12.4 - 13.1 mi

Top 1%
×2stories
+19ft-37ft

Overall

318

Males

292

M18-39

292

Half→25K

13.1 - 15.5 mi

Top 0.7%
×4stories
+66ft-88ft

Overall

199

Males

176

M18-39

176

25K→30K

15.5 - 18.6 mi

Top 1%
×9stories
+181ft-148ft

Overall

385

Males

356

M18-39

356

30K→20M

18.6 - 20.0 mi

Top 0.6%
×5stories
+64ft-50ft

Overall

173

Males

157

M18-39

157

20M→21M

20.0 - 21.0 mi

Top 1%
×8stories
+106ft-24ft

Overall

397

Males

373

M18-39

373

21M→35K

21.0 - 21.8 mi

Top 2%
×7stories
+17ft-86ft

Overall

489

Males

454

M18-39

454

35K→23M

21.8 - 23.0 mi

Top 1%
×5stories
+23ft-63ft

Overall

357

Males

335

M18-39

335

23M→24M

23.0 - 24.0 mi

Top 2%
×6stories
+12ft-82ft

Overall

504

Males

468

M18-39

468

24M→40K

24.0 - 24.9 mi

Top 1%
×1story
+6ft-20ft

Overall

342

Males

316

M18-39

316

40K→25.2M

24.9 - 25.2 mi

Top 0.5%
×1story
+13ft-16ft

Overall

144

Males

136

M18-39

136

25.2M→Finish

25.2 - 26.2 mi

Top 0.8%
×2stories
+22ft-21ft

Overall

220

Males

207

M18-39

207

Passing Analysis

Category:
Athletes Passed
112
Passed By
155
Net Change
-43
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#189
5K → 10K529-24#189#213
10K → 15K244-42#213#255
15K → 20K922-13#255#268
20K → Half000#268#268
Half → 25K273+24#268#244
25K → 30K926-17#244#261
30K → 20M182+16#261#245
20M → 21M87+1#245#244
21M → 35K440#244#244
35K → 23M45-1#244#245
23M → 24M86+2#245#243
24M → 40K34-1#243#244
40K → 25.2M70+7#244#237
25.2M → Finish83+5#237#232
TOTALS112155-43
📊

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