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BOSTON MARATHON 2025

Yat Kwan Stephen Chow

Bib: 28479•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M60-64)
#0 / 1259
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
9:35/mi
29:47
↑ 97↓ 3451.5%
10K· 6.21 mi
10:01/mi
1:00:54
↑ 79↓ 1380.4%
15K· 9.32 mi
11:21/mi
1:36:11
↑ 67↓ 78
20K· 12.43 mi
13:11/mi
2:17:08
↑ 106↓ 860.1%
Half· 13.11 mi
15:03/mi
2:27:24
↑ 19↓ 370.5%
25K· 15.53 mi
14:53/mi
3:03:28
↑ 66↓ 880.2%
30K· 18.64 mi
15:22/mi
3:51:11
↑ 181↓ 1480.2%
20M
13:41/mi
4:09:47
↑ 64↓ 500.2%
21M
16:55/mi
4:26:42
↑ 106↓ 241.6%
35K· 21.75 mi
13:38/mi
4:36:54
↑ 17↓ 861.7%
23M
14:11/mi
4:54:39
↑ 23↓ 630.6%
24M
12:43/mi
5:07:22
↓ 821.3%
40K· 24.85 mi
14:00/mi
5:19:20
↓ 200.3%
25.2M
17:53/mi
5:25:30
↑ 13↓ 160.2%
Finish· 26.22 mi
13:12/mi
5:38:57
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:27:24
Pace11:15 /mi
2nd Half
Distance13.11 mi
Time3:11:33
Pace14:37 /mi
📊Positive Split: 30.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:2329:479:3529:47
9:35
-
10K
6.21 mi12:17:301:00:549:4831:07
10:01
+0:26
15K
9.32 mi12:52:471:36:1110:1935:17
11:21
+1:20
20K
12.43 mi13:33:442:17:0811:0240:57
13:11
+1:50
Half
13.11 mi13:44:002:27:2411:1510:16
15:03
+1:52
25K
15.53 mi14:20:043:03:2811:4936:04
14:53
-0:10
30K
18.64 mi15:07:473:51:1112:2447:43
15:22
+0:29
20M
20.00 mi15:26:234:09:4712:2918:36
13:41
-1:41
21M
21.00 mi15:43:184:26:4212:4216:55
16:55
+3:14
35K
21.75 mi15:53:304:36:5412:4410:12
13:38
-3:17
23M
23.00 mi16:11:154:54:3912:4917:45
14:11
+0:33
24M
24.00 mi16:23:585:07:2212:4812:43
12:43
-1:28
40K
24.85 mi16:35:565:19:2012:5111:58
14:00
+1:17
25.2M
25.20 mi16:42:065:25:3012:556:10
17:53
+3:53
Finish
26.22 mi16:55:335:38:5712:5613:27
13:12
-4:41

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

9:35 /mi

Average Pace

12:56 /mi

Slowest Pace

17:53 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:36:11

28% of race

Time at Steady Pace

2:05:38

37% of race

Time at Slower Pace

1:57:08

35% of race

Average Pace: 12:56 /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 mi11:46:2329:479:3529:47
9:35
#24522
10K
6.21 mi12:17:301:00:549:4831:07
10:01
#24977
15K
9.32 mi12:52:471:36:1110:1935:17
11:21
#25946
20K
12.43 mi13:33:442:17:0811:0240:57
13:11
#26821
Half
13.11 mi13:44:002:27:2411:1510:16
15:03
#27069
25K
15.53 mi14:20:043:03:2811:4936:04
14:53
#27428
30K
18.64 mi15:07:473:51:1112:2447:43
15:22
#27645
20M
20.00 mi15:26:234:09:4712:2918:36
13:41
#27603
21M
21.00 mi15:43:184:26:4212:4216:55
16:55
#27676
35K
21.75 mi15:53:304:36:5412:4410:12
13:38
#27674
23M
23.00 mi16:11:154:54:3912:4917:45
14:11
#27671
24M
24.00 mi16:23:585:07:2212:4812:43
12:43
#27649
40K
24.85 mi16:35:565:19:2012:5111:58
14:00
#27641
25.2M
25.20 mi16:42:065:25:3012:556:10
17:53
#27683
Finish
26.22 mi16:55:335:38:5712:5613:27
13:12
#27696
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi24522144921449227094(Top 95%)15593(Top 97%)15593(Top 1239%)
10K6.21 mi3.10 mi24977-45514694-20214694-20225362(Top 89%)14861(Top 92%)14861(Top 1180%)
15K9.32 mi3.11 mi25946-96915137-44315137-44327094(Top 95%)15593(Top 97%)15593(Top 1239%)
20K12.43 mi3.11 mi26821-87515495-35815495-35827922(Top 98%)15906(Top 99%)15906(Top 1263%)
Half13.11 mi0.68 mi27069-24815588-9315588-9328353(Top 100%)16076(Top 100%)16076(Top 1277%)
25K15.53 mi2.42 mi27428-35915723-13515723-13528206(Top 99%)16008(Top 99%)16008(Top 1271%)
30K18.64 mi3.11 mi27645-21715801-7815801-7828147(Top 99%)15962(Top 99%)15962(Top 1268%)
20M20.00 mi1.36 mi27603+4215770+3115770+3127065(Top 95%)15405(Top 96%)15405(Top 1224%)
21M21.00 mi1.00 mi27676-7315795-2515795-2528129(Top 99%)15942(Top 99%)15942(Top 1266%)
35K21.75 mi0.75 mi27674+215789+615789+627451(Top 97%)15558(Top 97%)15558(Top 1236%)
23M23.00 mi1.25 mi27671+315784+515784+527458(Top 97%)15557(Top 97%)15557(Top 1236%)
24M24.00 mi1.00 mi27649+2215765+1915765+1926561(Top 94%)15097(Top 94%)15097(Top 1199%)
40K24.85 mi0.85 mi27641+815758+715758+727179(Top 96%)15382(Top 96%)15382(Top 1222%)
25.2M25.20 mi0.35 mi27683-4215770-1215770-1228210(Top 99%)15961(Top 99%)15961(Top 1268%)
Finish26.22 mi1.02 mi27696-1315772-215772-227721(Top 98%)15687(Top 97%)15687(Top 1246%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 95%
×21story building
+97ft-345ft

Overall

27094

Males

15593

M60-64

15593

5K→10K

3.1 - 6.2 mi

Top 89%
×5story building
+79ft-138ft

Overall

25362

Males

14861

M60-64

14861

10K→15K

6.2 - 9.3 mi

Top 95%
×3story building
+67ft-78ft

Overall

27094

Males

15593

M60-64

15593

15K→20K

9.3 - 12.4 mi

Top 98%
×5story building
+106ft-86ft

Overall

27922

Males

15906

M60-64

15906

20K→Half

12.4 - 13.1 mi

Top 100%
×2story building
+19ft-37ft

Overall

28353

Males

16076

M60-64

16076

Half→25K

13.1 - 15.5 mi

Top 99%
×4story building
+66ft-88ft

Overall

28206

Males

16008

M60-64

16008

25K→30K

15.5 - 18.6 mi

Top 99%
×9story building
+181ft-148ft

Overall

28147

Males

15962

M60-64

15962

30K→20M

18.6 - 20.0 mi

Top 95%
×5story building
+64ft-50ft

Overall

27065

Males

15405

M60-64

15405

20M→21M

20.0 - 21.0 mi

Top 99%
×8story building
+106ft-24ft

Overall

28129

Males

15942

M60-64

15942

21M→35K

21.0 - 21.8 mi

Top 97%
×7story building
+17ft-86ft

Overall

27451

Males

15558

M60-64

15558

35K→23M

21.8 - 23.0 mi

Top 97%
×5story building
+23ft-63ft

Overall

27458

Males

15557

M60-64

15557

23M→24M

23.0 - 24.0 mi

Top 94%
×6story building
+12ft-82ft

Overall

26561

Males

15097

M60-64

15097

24M→40K

24.0 - 24.9 mi

Top 96%
×1story
+6ft-20ft

Overall

27179

Males

15382

M60-64

15382

40K→25.2M

24.9 - 25.2 mi

Top 99%
×1story
+13ft-16ft

Overall

28210

Males

15961

M60-64

15961

25.2M→Finish

25.2 - 26.2 mi

Top 98%
×2story building
+22ft-21ft

Overall

27721

Males

15687

M60-64

15687

Passing Analysis

Category:
Athletes Passed
280
Passed By
3454
Net Change
-3174
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24522
5K → 10K77532-455#24522#24977
10K → 15K8977-969#24977#25946
15K → 20K4879-875#25946#26821
20K → Half0248-248#26821#27069
Half → 25K15374-359#27069#27428
25K → 30K16233-217#27428#27645
30K → 20M5513+42#27645#27603
20M → 21M881-73#27603#27676
21M → 35K1412+2#27676#27674
35K → 23M2421+3#27674#27671
23M → 24M3210+22#27671#27649
24M → 40K1810+8#27649#27641
40K → 25.2M042-42#27641#27683
25.2M → Finish922-13#27683#27696
TOTALS2803454-3174
📊

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