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BOSTON MARATHON 2025

Kuei-Lin Lo

Bib: 28807•M

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M50-54)
#0 / 1996
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:52
Rank: #20730
Start → 5K
8:39/mi
26:52 split
10K· 6.21 mi
53:47
Rank: #20681 (+49)
5K → 10K
8:40/mi
26:55 split
15K· 9.32 mi
1:20:54
Rank: #20637 (+44)
10K → 15K
8:44/mi
27:07 split
20K· 12.43 mi
1:48:52
Rank: #20724 (-87)
15K → 20K
9:00/mi
27:58 split
Half· 13.11 mi
1:54:44
Rank: #20676 (+48)
20K → Half
8:36/mi
5:52 split
25K· 15.53 mi
2:16:43
Rank: #20634 (+42)
Half → 25K
9:04/mi
21:59 split
30K· 18.64 mi
2:45:18
Rank: #20221 (+413)
25K → 30K
9:12/mi
28:35 split
20M
2:57:54
Rank: #20063 (+158)
30K → 20M
9:16/mi
12:36 split
21M
3:07:40
Rank: #19883 (+180)
20M → 21M
9:46/mi
9:46 split
35K· 21.75 mi
3:14:44
Rank: #19897 (-14)
21M → 35K
9:27/mi
7:04 split
23M
3:27:53
Rank: #20100 (-203)
35K → 23M
10:30/mi
13:09 split
24M
3:37:17
Rank: #20067 (+33)
23M → 24M
9:24/mi
9:24 split
40K· 24.85 mi
3:45:28
Rank: #20018 (+49)
24M → 40K
9:34/mi
8:11 split
25.2M
3:49:02
Rank: #19992 (+26)
40K → 25.2M
10:21/mi
3:34 split
Finish· 26.22 mi
3:58:15
Rank: #19996 (-4)
25.2M → Finish
9:03/mi
9:13 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:54:44
Pace8:45 /mi
2nd Half
Distance13.11 mi
Time2:03:31
Pace9:25 /mi
📊Positive Split: 7.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:44:4626:528:3926:52
8:39
-
10K
6.21 mi12:11:4153:478:3926:55
8:40
+0:01
15K
9.32 mi12:38:481:20:548:4127:07
8:44
+0:04
20K
12.43 mi13:06:461:48:528:4627:58
9:00
+0:16
Half
13.11 mi13:12:381:54:448:455:52
8:36
-0:24
25K
15.53 mi13:34:372:16:438:4821:59
9:04
+0:28
30K
18.64 mi14:03:122:45:188:5228:35
9:12
+0:08
20M
20.00 mi14:15:482:57:548:5412:36
9:16
+0:04
21M
21.00 mi14:25:343:07:408:569:46
9:46
+0:30
35K
21.75 mi14:32:383:14:448:577:04
9:27
-0:19
23M
23.00 mi14:45:473:27:539:0213:09
10:30
+1:03
24M
24.00 mi14:55:113:37:179:039:24
9:24
-1:06
40K
24.85 mi15:03:223:45:289:048:11
9:34
+0:10
25.2M
25.20 mi15:06:563:49:029:053:34
10:21
+0:47
Finish
26.22 mi15:16:093:58:159:069:13
9:03
-1:18

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

8:36 /mi

Average Pace

9:06 /mi

Slowest Pace

10:30 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:26:46

36% of race

Time at Steady Pace

1:56:49

49% of race

Time at Slower Pace

34:40

15% of race

Average Pace: 9:05 /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 mi11:44:4626:528:3926:52
8:39
#20730
10K
6.21 mi12:11:4153:478:3926:55
8:40
#20681
15K
9.32 mi12:38:481:20:548:4127:07
8:44
#20637
20K
12.43 mi13:06:461:48:528:4627:58
9:00
#20724
Half
13.11 mi13:12:381:54:448:455:52
8:36
#20676
25K
15.53 mi13:34:372:16:438:4821:59
9:04
#20634
30K
18.64 mi14:03:122:45:188:5228:35
9:12
#20221
20M
20.00 mi14:15:482:57:548:5412:36
9:16
#20063
21M
21.00 mi14:25:343:07:408:569:46
9:46
#19883
35K
21.75 mi14:32:383:14:448:577:04
9:27
#19897
23M
23.00 mi14:45:473:27:539:0213:09
10:30
#20100
24M
24.00 mi14:55:113:37:179:039:24
9:24
#20067
40K
24.85 mi15:03:223:45:289:048:11
9:34
#20018
25.2M
25.20 mi15:06:563:49:029:053:34
10:21
#19992
Finish
26.22 mi15:16:093:58:159:069:13
9:03
#19996
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi20730127421274220630(Top 73%)12781(Top 79%)12781(Top 640%)
10K6.21 mi3.10 mi20681+4912743-112743-120678(Top 73%)12774(Top 79%)12774(Top 640%)
15K9.32 mi3.11 mi20637+4412752-912752-920630(Top 73%)12781(Top 79%)12781(Top 640%)
20K12.43 mi3.11 mi20724-8712782-3012782-3020965(Top 74%)12871(Top 80%)12871(Top 645%)
Half13.11 mi0.68 mi20676+4812759+2312759+2319791(Top 70%)12384(Top 77%)12384(Top 620%)
25K15.53 mi2.42 mi20634+4212736+2312736+2320202(Top 71%)12502(Top 78%)12502(Top 626%)
30K18.64 mi3.11 mi20221+41312515+22112515+22118639(Top 66%)11678(Top 73%)11678(Top 585%)
20M20.00 mi1.36 mi20063+15812423+9212423+9218151(Top 64%)11306(Top 70%)11306(Top 566%)
21M21.00 mi1.00 mi19883+18012325+9812325+9817332(Top 61%)10848(Top 67%)10848(Top 543%)
35K21.75 mi0.75 mi19897-1412317+812317+820125(Top 71%)12028(Top 75%)12028(Top 603%)
23M23.00 mi1.25 mi20100-20312365-4812365-4822020(Top 78%)12883(Top 80%)12883(Top 645%)
24M24.00 mi1.00 mi20067+3312338+2712338+2719219(Top 68%)11512(Top 71%)11512(Top 577%)
40K24.85 mi0.85 mi20018+4912294+4412294+4418982(Top 67%)11313(Top 70%)11313(Top 567%)
25.2M25.20 mi0.35 mi19992+2612277+1712277+1718432(Top 65%)11040(Top 69%)11040(Top 553%)
Finish26.22 mi1.02 mi19996-412265+1212265+1219251(Top 68%)11459(Top 71%)11459(Top 574%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 73%
×21stories
+97ft-345ft

Overall

20630

Males

12781

M50-54

12781

5K→10K

3.1 - 6.2 mi

Top 73%
×5stories
+79ft-138ft

Overall

20678

Males

12774

M50-54

12774

10K→15K

6.2 - 9.3 mi

Top 73%
×3stories
+67ft-78ft

Overall

20630

Males

12781

M50-54

12781

15K→20K

9.3 - 12.4 mi

Top 74%
×5stories
+106ft-86ft

Overall

20965

Males

12871

M50-54

12871

20K→Half

12.4 - 13.1 mi

Top 70%
×2stories
+19ft-37ft

Overall

19791

Males

12384

M50-54

12384

Half→25K

13.1 - 15.5 mi

Top 71%
×4stories
+66ft-88ft

Overall

20202

Males

12502

M50-54

12502

25K→30K

15.5 - 18.6 mi

Top 66%
×9stories
+181ft-148ft

Overall

18639

Males

11678

M50-54

11678

30K→20M

18.6 - 20.0 mi

Top 64%
×5stories
+64ft-50ft

Overall

18151

Males

11306

M50-54

11306

20M→21M

20.0 - 21.0 mi

Top 61%
×8stories
+106ft-24ft

Overall

17332

Males

10848

M50-54

10848

21M→35K

21.0 - 21.8 mi

Top 71%
×7stories
+17ft-86ft

Overall

20125

Males

12028

M50-54

12028

35K→23M

21.8 - 23.0 mi

Top 78%
×5stories
+23ft-63ft

Overall

22020

Males

12883

M50-54

12883

23M→24M

23.0 - 24.0 mi

Top 68%
×6stories
+12ft-82ft

Overall

19219

Males

11512

M50-54

11512

24M→40K

24.0 - 24.9 mi

Top 67%
×1story
+6ft-20ft

Overall

18982

Males

11313

M50-54

11313

40K→25.2M

24.9 - 25.2 mi

Top 65%
×1story
+13ft-16ft

Overall

18432

Males

11040

M50-54

11040

25.2M→Finish

25.2 - 26.2 mi

Top 68%
×2stories
+22ft-21ft

Overall

19251

Males

11459

M50-54

11459

Passing Analysis

Category:
Athletes Passed
2076
Passed By
1342
Net Change
+734
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20730
5K → 10K304255+49#20730#20681
10K → 15K218174+44#20681#20637
15K → 20K152239-87#20637#20724
20K → Half5810+48#20724#20676
Half → 25K170128+42#20676#20634
25K → 30K45239+413#20634#20221
30K → 20M18325+158#20221#20063
20M → 21M19212+180#20063#19883
21M → 35K4660-14#19883#19897
35K → 23M39242-203#19897#20100
23M → 24M7542+33#20100#20067
24M → 40K8334+49#20067#20018
40K → 25.2M3610+26#20018#19992
25.2M → Finish6872-4#19992#19996
TOTALS20761342+734
📊

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