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BOSTON MARATHON 2025

Wai Hong Chow

Bib: 5011•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 17%
Gender (Male)
#0 / 16105
Top 27%
Division (M18-39)
#0 / 5642
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:41
Rank: #2668
Start → 5K
6:20/mi
19:41 split
10K· 6.21 mi
40:13
Rank: #3565 (-897)
5K → 10K
6:37/mi
20:32 split
15K· 9.32 mi
1:00:53
Rank: #3904 (-339)
10K → 15K
6:39/mi
20:40 split
20K· 12.43 mi
1:22:04
Rank: #4197 (-293)
15K → 20K
6:49/mi
21:11 split
Half· 13.11 mi
1:26:49
Rank: #4347 (-150)
20K → Half
6:58/mi
4:45 split
25K· 15.53 mi
1:44:08
Rank: #4827 (-480)
Half → 25K
7:09/mi
17:19 split
30K· 18.64 mi
2:07:15
Rank: #5378 (-551)
25K → 30K
7:26/mi
23:07 split
20M
2:17:27
Rank: #5548 (-170)
30K → 20M
7:30/mi
10:12 split
21M
2:25:29
Rank: #5622 (-74)
20M → 21M
8:02/mi
8:02 split
35K· 21.75 mi
2:30:48
Rank: #5619 (+3)
21M → 35K
7:06/mi
5:19 split
23M
2:39:48
Rank: #5488 (+131)
35K → 23M
7:11/mi
9:00 split
24M
2:46:27
Rank: #5329 (+159)
23M → 24M
6:39/mi
6:39 split
40K· 24.85 mi
2:52:00
Rank: #5137 (+192)
24M → 40K
6:29/mi
5:33 split
25.2M
2:54:24
Rank: #5040 (+97)
40K → 25.2M
6:58/mi
2:24 split
Finish· 26.22 mi
3:00:33
Rank: #4808 (+232)
25.2M → Finish
6:02/mi
6:09 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:26:49
Pace6:37 /mi
2nd Half
Distance13.11 mi
Time1:33:44
Pace7:09 /mi
📊Positive Split: 8.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:0819:416:2019:41
6:20
-
10K
6.21 mi10:44:4040:136:2820:32
6:37
+0:17
15K
9.32 mi11:05:201:00:536:3220:40
6:39
+0:02
20K
12.43 mi11:26:311:22:046:3621:11
6:49
+0:10
Half
13.11 mi11:31:161:26:496:374:45
6:58
+0:09
25K
15.53 mi11:48:351:44:086:4217:19
7:09
+0:11
30K
18.64 mi12:11:422:07:156:5023:07
7:26
+0:17
20M
20.00 mi12:21:542:17:276:5210:12
7:30
+0:04
21M
21.00 mi12:29:562:25:296:568:02
8:02
+0:32
35K
21.75 mi12:35:152:30:486:565:19
7:06
-0:56
23M
23.00 mi12:44:152:39:486:579:00
7:11
+0:05
24M
24.00 mi12:50:542:46:276:566:39
6:39
-0:32
40K
24.85 mi12:56:272:52:006:555:33
6:29
-0:10
25.2M
25.20 mi12:58:512:54:246:552:24
6:58
+0:29
Finish
26.22 mi13:05:003:00:336:536:09
6:02
-0:56

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

6:02 /mi

Average Pace

6:53 /mi

Slowest Pace

8:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:19:14

44% of race

Time at Steady Pace

59:58

33% of race

Time at Slower Pace

41:21

23% of race

Average Pace: 6:53 /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 mi10:24:0819:416:2019:41
6:20
#2668
10K
6.21 mi10:44:4040:136:2820:32
6:37
#3565
15K
9.32 mi11:05:201:00:536:3220:40
6:39
#3904
20K
12.43 mi11:26:311:22:046:3621:11
6:49
#4197
Half
13.11 mi11:31:161:26:496:374:45
6:58
#4347
25K
15.53 mi11:48:351:44:086:4217:19
7:09
#4827
30K
18.64 mi12:11:422:07:156:5023:07
7:26
#5378
20M
20.00 mi12:21:542:17:276:5210:12
7:30
#5548
21M
21.00 mi12:29:562:25:296:568:02
8:02
#5622
35K
21.75 mi12:35:152:30:486:565:19
7:06
#5619
23M
23.00 mi12:44:152:39:486:579:00
7:11
#5488
24M
24.00 mi12:50:542:46:276:566:39
6:39
#5329
40K
24.85 mi12:56:272:52:006:555:33
6:29
#5137
25.2M
25.20 mi12:58:512:54:246:552:24
6:58
#5040
Finish
26.22 mi13:05:003:00:336:536:09
6:02
#4808
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2668254325434654(Top 16%)4355(Top 27%)4355(Top 77%)
10K6.21 mi3.10 mi3565-8973381-8383381-8384535(Top 16%)4249(Top 26%)4249(Top 75%)
15K9.32 mi3.11 mi3904-3393682-3013682-3014654(Top 16%)4355(Top 27%)4355(Top 77%)
20K12.43 mi3.11 mi4197-2933948-2663948-2665465(Top 19%)4992(Top 31%)4992(Top 88%)
Half13.11 mi0.68 mi4347-1504080-1324080-1327218(Top 25%)6360(Top 39%)6360(Top 113%)
25K15.53 mi2.42 mi4827-4804488-4084488-4087211(Top 25%)6256(Top 39%)6256(Top 111%)
30K18.64 mi3.11 mi5378-5514933-4454933-4457287(Top 26%)6140(Top 38%)6140(Top 109%)
20M20.00 mi1.36 mi5548-1705069-1365069-1367013(Top 25%)5831(Top 36%)5831(Top 103%)
21M21.00 mi1.00 mi5622-745120-515120-517486(Top 26%)5951(Top 37%)5951(Top 105%)
35K21.75 mi0.75 mi5619+35108+125108+125972(Top 21%)5029(Top 31%)5029(Top 89%)
23M23.00 mi1.25 mi5488+1314983+1254983+1254779(Top 17%)4155(Top 26%)4155(Top 74%)
24M24.00 mi1.00 mi5329+1594851+1324851+1322720(Top 10%)2494(Top 15%)2494(Top 44%)
40K24.85 mi0.85 mi5137+1924673+1784673+1781577(Top 6%)1461(Top 9%)1461(Top 26%)
25.2M25.20 mi0.35 mi5040+974595+784595+781382(Top 5%)1269(Top 8%)1269(Top 22%)
Finish26.22 mi1.02 mi4808+2324393+2024393+2021020(Top 4%)958(Top 6%)958(Top 17%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 16%
×21story building
+97ft-345ft

Overall

4654

Males

4355

M18-39

4355

5K→10K

3.1 - 6.2 mi

Top 16%
×5story building
+79ft-138ft

Overall

4535

Males

4249

M18-39

4249

10K→15K

6.2 - 9.3 mi

Top 16%
×3story building
+67ft-78ft

Overall

4654

Males

4355

M18-39

4355

15K→20K

9.3 - 12.4 mi

Top 19%
×5story building
+106ft-86ft

Overall

5465

Males

4992

M18-39

4992

20K→Half

12.4 - 13.1 mi

Top 25%
×2story building
+19ft-37ft

Overall

7218

Males

6360

M18-39

6360

Half→25K

13.1 - 15.5 mi

Top 25%
×4story building
+66ft-88ft

Overall

7211

Males

6256

M18-39

6256

25K→30K

15.5 - 18.6 mi

Top 26%
×9story building
+181ft-148ft

Overall

7287

Males

6140

M18-39

6140

30K→20M

18.6 - 20.0 mi

Top 25%
×5story building
+64ft-50ft

Overall

7013

Males

5831

M18-39

5831

20M→21M

20.0 - 21.0 mi

Top 26%
×8story building
+106ft-24ft

Overall

7486

Males

5951

M18-39

5951

21M→35K

21.0 - 21.8 mi

Top 21%
×7story building
+17ft-86ft

Overall

5972

Males

5029

M18-39

5029

35K→23M

21.8 - 23.0 mi

Top 17%
×5story building
+23ft-63ft

Overall

4779

Males

4155

M18-39

4155

23M→24M

23.0 - 24.0 mi

Top 10%
×6story building
+12ft-82ft

Overall

2720

Males

2494

M18-39

2494

24M→40K

24.0 - 24.9 mi

Top 6%
×1story
+6ft-20ft

Overall

1577

Males

1461

M18-39

1461

40K→25.2M

24.9 - 25.2 mi

Top 5%
×1story
+13ft-16ft

Overall

1382

Males

1269

M18-39

1269

25.2M→Finish

25.2 - 26.2 mi

Top 4%
×2story building
+22ft-21ft

Overall

1020

Males

958

M18-39

958

Passing Analysis

Category:
Athletes Passed
1119
Passed By
3259
Net Change
-2140
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2668
5K → 10K6903-897#2668#3565
10K → 15K29368-339#3565#3904
15K → 20K34327-293#3904#4197
20K → Half3153-150#4197#4347
Half → 25K34514-480#4347#4827
25K → 30K65616-551#4827#5378
30K → 20M39209-170#5378#5548
20M → 21M38112-74#5548#5622
21M → 35K3936+3#5622#5619
35K → 23M14918+131#5619#5488
23M → 24M1612+159#5488#5329
24M → 40K1931+192#5329#5137
40K → 25.2M970+97#5137#5040
25.2M → Finish2320+232#5040#4808
TOTALS11193259-2140
📊

Passing Visuals

Category:
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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