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BOSTON MARATHON 2025

Dennis Wai-Keung Lui

Bib: 2049•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 9%
Gender (Male)
#0 / 16105
Top 15%
Masters (Masters Men)
#0 / 10463
Top 5%
Division (M40-44)
#0 / 2247
Top 14%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:14
Rank: #1818
Start → 5K
19:14 | 6:11/mi
10K· 6.21 mi
39:04
Rank: #2331 (-513)
5K → 10K
19:50 | 6:23/mi
15K· 9.32 mi
58:55
Rank: #2516 (-185)
10K → 15K
19:51 | 6:23/mi
20K· 12.43 mi
1:19:03
Rank: #2614 (-98)
15K → 20K
20:08 | 6:29/mi
Half· 13.11 mi
1:23:27
Rank: #2653 (-39)
20K → Half
4:24 | 6:27/mi
25K· 15.53 mi
1:39:22
Rank: #2723 (-70)
Half → 25K
15:55 | 6:34/mi
30K· 18.64 mi
2:00:20
Rank: #2749 (-26)
25K → 30K
20:58 | 6:45/mi
20M
2:09:34
Rank: #2755 (-6)
30K → 20M
9:14 | 6:48/mi
21M
2:16:39
Rank: #2716 (+39)
20M → 21M
7:05 | 7:05/mi
35K· 21.75 mi
2:21:32
Rank: #2687 (+29)
21M → 35K
4:53 | 6:32/mi
23M
2:30:04
Rank: #2659 (+28)
35K → 23M
8:32 | 6:49/mi
24M
2:36:44
Rank: #2624 (+35)
23M → 24M
6:40 | 6:40/mi
40K· 24.85 mi
2:42:37
Rank: #2619 (+5)
24M → 40K
5:53 | 6:53/mi
25.2M
2:45:14
Rank: #2629 (-10)
40K → 25.2M
2:37 | 7:35/mi
Finish· 26.22 mi
2:51:56
Rank: #2625 (+4)
25.2M → Finish
6:42 | 6:34/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:23:27
Pace6:22 /mi
2nd Half
Distance13.11 mi
Time1:28:29
Pace6:45 /mi
📊Positive Split: 6.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:4819:146:1119:14
6:11
-
10K
6.21 mi10:39:3839:046:1719:50
6:23
+0:12
15K
9.32 mi10:59:2958:556:1919:51
6:23
0:00
20K
12.43 mi11:19:371:19:036:2220:08
6:29
+0:06
Half
13.11 mi11:24:011:23:276:224:24
6:27
-0:02
25K
15.53 mi11:39:561:39:226:2415:55
6:34
+0:07
30K
18.64 mi12:00:542:00:206:2720:58
6:45
+0:11
20M
20.00 mi12:10:082:09:346:299:14
6:48
+0:03
21M
21.00 mi12:17:132:16:396:307:05
7:05
+0:17
35K
21.75 mi12:22:062:21:326:304:53
6:32
-0:33
23M
23.00 mi12:30:382:30:046:318:32
6:49
+0:17
24M
24.00 mi12:37:182:36:446:326:40
6:40
-0:09
40K
24.85 mi12:43:112:42:376:335:53
6:53
+0:13
25.2M
25.20 mi12:45:482:45:146:332:37
7:35
+0:42
Finish
26.22 mi12:52:302:51:566:346:42
6:34
-1:01

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

6:11 /mi

Average Pace

6:34 /mi

Slowest Pace

7:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

58:55

34% of race

Time at Steady Pace

58:42

34% of race

Time at Slower Pace

54:19

32% of race

Average Pace: 6:33 /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 mi10:19:4819:146:1119:14
6:11
#1818
10K
6.21 mi10:39:3839:046:1719:50
6:23
#2331
15K
9.32 mi10:59:2958:556:1919:51
6:23
#2516
20K
12.43 mi11:19:371:19:036:2220:08
6:29
#2614
Half
13.11 mi11:24:011:23:276:224:24
6:27
#2653
25K
15.53 mi11:39:561:39:226:2415:55
6:34
#2723
30K
18.64 mi12:00:542:00:206:2720:58
6:45
#2749
20M
20.00 mi12:10:082:09:346:299:14
6:48
#2755
21M
21.00 mi12:17:132:16:396:307:05
7:05
#2716
35K
21.75 mi12:22:062:21:326:304:53
6:32
#2687
23M
23.00 mi12:30:382:30:046:318:32
6:49
#2659
24M
24.00 mi12:37:182:36:446:326:40
6:40
#2624
40K
24.85 mi12:43:112:42:376:335:53
6:53
#2619
25.2M
25.20 mi12:45:482:45:146:332:37
7:35
#2629
Finish
26.22 mi12:52:302:51:566:346:42
6:34
#2625
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi1818172817282879(Top 10%)2744(Top 17%)2744(Top 122%)
10K6.21 mi3.10 mi2331-5132223-4952223-4952942(Top 10%)2801(Top 17%)2801(Top 125%)
15K9.32 mi3.11 mi2516-1852400-1772400-1772879(Top 10%)2744(Top 17%)2744(Top 122%)
20K12.43 mi3.11 mi2614-982494-942494-943021(Top 11%)2875(Top 18%)2875(Top 128%)
Half13.11 mi0.68 mi2653-392531-372531-373390(Top 12%)3216(Top 20%)3216(Top 143%)
25K15.53 mi2.42 mi2723-702598-672598-673237(Top 11%)3065(Top 19%)3065(Top 136%)
30K18.64 mi3.11 mi2749-262621-232621-233140(Top 11%)2947(Top 18%)2947(Top 131%)
20M20.00 mi1.36 mi2755-62625-42625-42905(Top 10%)2714(Top 17%)2714(Top 121%)
21M21.00 mi1.00 mi2716+392586+392586+392619(Top 9%)2441(Top 15%)2441(Top 109%)
35K21.75 mi0.75 mi2687+292556+302556+302629(Top 9%)2448(Top 15%)2448(Top 109%)
23M23.00 mi1.25 mi2659+282526+302526+302790(Top 10%)2564(Top 16%)2564(Top 114%)
24M24.00 mi1.00 mi2624+352491+352491+352809(Top 10%)2576(Top 16%)2576(Top 115%)
40K24.85 mi0.85 mi2619+52483+82483+83274(Top 12%)2926(Top 18%)2926(Top 130%)
25.2M25.20 mi0.35 mi2629-102490-72490-73825(Top 13%)3307(Top 21%)3307(Top 147%)
Finish26.22 mi1.02 mi2625+42484+62484+63212(Top 11%)2844(Top 18%)2844(Top 127%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 10%
×21stories
+97ft-345ft

Overall

2879

Males

2744

M40-44

2744

5K→10K

3.1 - 6.2 mi

Top 10%
×5stories
+79ft-138ft

Overall

2942

Males

2801

M40-44

2801

10K→15K

6.2 - 9.3 mi

Top 10%
×3stories
+67ft-78ft

Overall

2879

Males

2744

M40-44

2744

15K→20K

9.3 - 12.4 mi

Top 11%
×5stories
+106ft-86ft

Overall

3021

Males

2875

M40-44

2875

20K→Half

12.4 - 13.1 mi

Top 12%
×2stories
+19ft-37ft

Overall

3390

Males

3216

M40-44

3216

Half→25K

13.1 - 15.5 mi

Top 11%
×4stories
+66ft-88ft

Overall

3237

Males

3065

M40-44

3065

25K→30K

15.5 - 18.6 mi

Top 11%
×9stories
+181ft-148ft

Overall

3140

Males

2947

M40-44

2947

30K→20M

18.6 - 20.0 mi

Top 10%
×5stories
+64ft-50ft

Overall

2905

Males

2714

M40-44

2714

20M→21M

20.0 - 21.0 mi

Top 9%
×8stories
+106ft-24ft

Overall

2619

Males

2441

M40-44

2441

21M→35K

21.0 - 21.8 mi

Top 9%
×7stories
+17ft-86ft

Overall

2629

Males

2448

M40-44

2448

35K→23M

21.8 - 23.0 mi

Top 10%
×5stories
+23ft-63ft

Overall

2790

Males

2564

M40-44

2564

23M→24M

23.0 - 24.0 mi

Top 10%
×6stories
+12ft-82ft

Overall

2809

Males

2576

M40-44

2576

24M→40K

24.0 - 24.9 mi

Top 12%
×1story
+6ft-20ft

Overall

3274

Males

2926

M40-44

2926

40K→25.2M

24.9 - 25.2 mi

Top 13%
×1story
+13ft-16ft

Overall

3825

Males

3307

M40-44

3307

25.2M→Finish

25.2 - 26.2 mi

Top 11%
×2stories
+22ft-21ft

Overall

3212

Males

2844

M40-44

2844

Passing Analysis

Category:
Athletes Passed
595
Passed By
1402
Net Change
-807
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1818
5K → 10K9522-513#1818#2331
10K → 15K31216-185#2331#2516
15K → 20K44142-98#2516#2614
20K → Half544-39#2614#2653
Half → 25K44114-70#2653#2723
25K → 30K90116-26#2723#2749
30K → 20M5561-6#2749#2755
20M → 21M6627+39#2755#2716
21M → 35K4011+29#2716#2687
35K → 23M6739+28#2687#2659
23M → 24M5621+35#2659#2624
24M → 40K4035+5#2624#2619
40K → 25.2M1424-10#2619#2629
25.2M → Finish3430+4#2629#2625
TOTALS5951402-807
📊

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