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BOSTON MARATHON 2025

Chun Hsien Li

Bib: 9032•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M45-49)
#0 / 2386
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:15
Rank: #19591
Start → 5K
26:15 | 8:27/mi
10K· 6.21 mi
53:10
Rank: #20170 (-579)
5K → 10K
26:55 | 8:40/mi
15K· 9.32 mi
1:19:03
Rank: #19547 (+623)
10K → 15K
25:53 | 8:20/mi
20K· 12.43 mi
1:48:08
Rank: #20425 (-878)
15K → 20K
29:05 | 9:22/mi
Half· 13.11 mi
1:54:55
Rank: #20754 (-329)
20K → Half
6:47 | 9:57/mi
25K· 15.53 mi
2:16:56
Rank: #20696 (+58)
Half → 25K
22:01 | 9:05/mi
30K· 18.64 mi
2:45:40
Rank: #20314 (+382)
25K → 30K
28:44 | 9:15/mi
20M
2:57:50
Rank: #20038 (+276)
30K → 20M
12:10 | 8:57/mi
21M
3:08:26
Rank: #20049 (-11)
20M → 21M
10:36 | 10:36/mi
35K· 21.75 mi
3:16:32
Rank: #20287 (-238)
21M → 35K
8:06 | 10:50/mi
23M
3:29:45
Rank: #20457 (-170)
35K → 23M
13:13 | 10:33/mi
24M
3:39:40
Rank: #20519 (-62)
23M → 24M
9:55 | 9:55/mi
40K· 24.85 mi
3:48:09
Rank: #20527 (-8)
24M → 40K
8:29 | 9:55/mi
25.2M
3:51:47
Rank: #20526 (+1)
40K → 25.2M
3:38 | 10:32/mi
Finish· 26.22 mi
4:01:14
Rank: #20533 (-7)
25.2M → Finish
9:27 | 9:16/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:54:55
Pace8:46 /mi
2nd Half
Distance13.11 mi
Time2:06:19
Pace9:38 /mi
📊Positive Split: 9.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:0926:158:2726:15
8:27
-
10K
6.21 mi11:44:0453:108:3326:55
8:40
+0:13
15K
9.32 mi12:09:571:19:038:2925:53
8:20
-0:20
20K
12.43 mi12:39:021:48:088:4229:05
9:22
+1:02
Half
13.11 mi12:45:491:54:558:466:47
9:57
+0:35
25K
15.53 mi13:07:502:16:568:4922:01
9:05
-0:52
30K
18.64 mi13:36:342:45:408:5328:44
9:15
+0:10
20M
20.00 mi13:48:442:57:508:5312:10
8:57
-0:18
21M
21.00 mi13:59:203:08:268:5810:36
10:36
+1:39
35K
21.75 mi14:07:263:16:329:028:06
10:50
+0:14
23M
23.00 mi14:20:393:29:459:0713:13
10:33
-0:17
24M
24.00 mi14:30:343:39:409:099:55
9:55
-0:38
40K
24.85 mi14:39:033:48:099:118:29
9:55
0:00
25.2M
25.20 mi14:42:413:51:479:123:38
10:32
+0:37
Finish
26.22 mi14:52:084:01:149:129:27
9:16
-1:16

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

8:20 /mi

Average Pace

9:12 /mi

Slowest Pace

10:50 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:31:13

38% of race

Time at Steady Pace

1:29:17

37% of race

Time at Slower Pace

1:00:44

25% of race

Average Pace: 9:12 /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 mi11:17:0926:158:2726:15
8:27
#19591
10K
6.21 mi11:44:0453:108:3326:55
8:40
#20170
15K
9.32 mi12:09:571:19:038:2925:53
8:20
#19547
20K
12.43 mi12:39:021:48:088:4229:05
9:22
#20425
Half
13.11 mi12:45:491:54:558:466:47
9:57
#20754
25K
15.53 mi13:07:502:16:568:4922:01
9:05
#20696
30K
18.64 mi13:36:342:45:408:5328:44
9:15
#20314
20M
20.00 mi13:48:442:57:508:5312:10
8:57
#20038
21M
21.00 mi13:59:203:08:268:5810:36
10:36
#20049
35K
21.75 mi14:07:263:16:329:028:06
10:50
#20287
23M
23.00 mi14:20:393:29:459:0713:13
10:33
#20457
24M
24.00 mi14:30:343:39:409:099:55
9:55
#20519
40K
24.85 mi14:39:033:48:099:118:29
9:55
#20527
25.2M
25.20 mi14:42:413:51:479:123:38
10:32
#20526
Finish
26.22 mi14:52:084:01:149:129:27
9:16
#20533
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi19591122831228318262(Top 64%)11742(Top 73%)11742(Top 492%)
10K6.21 mi3.10 mi20170-57912536-25312536-25320679(Top 73%)12775(Top 79%)12775(Top 535%)
15K9.32 mi3.11 mi19547+62312287+24912287+24918262(Top 64%)11742(Top 73%)11742(Top 492%)
20K12.43 mi3.11 mi20425-87812652-36512652-36522441(Top 79%)13548(Top 84%)13548(Top 568%)
Half13.11 mi0.68 mi20754-32912795-14312795-14324695(Top 87%)14518(Top 90%)14518(Top 608%)
25K15.53 mi2.42 mi20696+5812767+2812767+2820261(Top 71%)12528(Top 78%)12528(Top 525%)
30K18.64 mi3.11 mi20314+38212549+21812549+21818888(Top 66%)11783(Top 73%)11783(Top 494%)
20M20.00 mi1.36 mi20038+27612417+13212417+13216556(Top 58%)10619(Top 66%)10619(Top 445%)
21M21.00 mi1.00 mi20049-1112394+2312394+2320310(Top 72%)12177(Top 76%)12177(Top 510%)
35K21.75 mi0.75 mi20287-23812478-8412478-8423856(Top 84%)13817(Top 86%)13817(Top 579%)
23M23.00 mi1.25 mi20457-17012537-5912537-5922149(Top 78%)12951(Top 80%)12951(Top 543%)
24M24.00 mi1.00 mi20519-6212552-1512552-1521106(Top 74%)12396(Top 77%)12396(Top 520%)
40K24.85 mi0.85 mi20527-812536+1612536+1620183(Top 71%)11885(Top 74%)11885(Top 498%)
25.2M25.20 mi0.35 mi20526+112528+812528+819114(Top 67%)11372(Top 71%)11372(Top 477%)
Finish26.22 mi1.02 mi20533-712521+712521+720265(Top 71%)11939(Top 74%)11939(Top 500%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 64%
×21stories
+97ft-345ft

Overall

18262

Males

11742

M45-49

11742

5K→10K

3.1 - 6.2 mi

Top 73%
×5stories
+79ft-138ft

Overall

20679

Males

12775

M45-49

12775

10K→15K

6.2 - 9.3 mi

Top 64%
×3stories
+67ft-78ft

Overall

18262

Males

11742

M45-49

11742

15K→20K

9.3 - 12.4 mi

Top 79%
×5stories
+106ft-86ft

Overall

22441

Males

13548

M45-49

13548

20K→Half

12.4 - 13.1 mi

Top 87%
×2stories
+19ft-37ft

Overall

24695

Males

14518

M45-49

14518

Half→25K

13.1 - 15.5 mi

Top 71%
×4stories
+66ft-88ft

Overall

20261

Males

12528

M45-49

12528

25K→30K

15.5 - 18.6 mi

Top 66%
×9stories
+181ft-148ft

Overall

18888

Males

11783

M45-49

11783

30K→20M

18.6 - 20.0 mi

Top 58%
×5stories
+64ft-50ft

Overall

16556

Males

10619

M45-49

10619

20M→21M

20.0 - 21.0 mi

Top 72%
×8stories
+106ft-24ft

Overall

20310

Males

12177

M45-49

12177

21M→35K

21.0 - 21.8 mi

Top 84%
×7stories
+17ft-86ft

Overall

23856

Males

13817

M45-49

13817

35K→23M

21.8 - 23.0 mi

Top 78%
×5stories
+23ft-63ft

Overall

22149

Males

12951

M45-49

12951

23M→24M

23.0 - 24.0 mi

Top 74%
×6stories
+12ft-82ft

Overall

21106

Males

12396

M45-49

12396

24M→40K

24.0 - 24.9 mi

Top 71%
×1story
+6ft-20ft

Overall

20183

Males

11885

M45-49

11885

40K→25.2M

24.9 - 25.2 mi

Top 67%
×1story
+13ft-16ft

Overall

19114

Males

11372

M45-49

11372

25.2M→Finish

25.2 - 26.2 mi

Top 71%
×2stories
+22ft-21ft

Overall

20265

Males

11939

M45-49

11939

Passing Analysis

Category:
Athletes Passed
1968
Passed By
2910
Net Change
-942
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19591
5K → 10K82661-579#19591#20170
10K → 15K63815+623#20170#19547
15K → 20K42920-878#19547#20425
20K → Half1330-329#20425#20754
Half → 25K178120+58#20754#20696
25K → 30K42442+382#20696#20314
30K → 20M2826+276#20314#20038
20M → 21M90101-11#20038#20049
21M → 35K19257-238#20049#20287
35K → 23M52222-170#20287#20457
23M → 24M3698-62#20457#20519
24M → 40K5563-8#20519#20527
40K → 25.2M2625+1#20527#20526
25.2M → Finish4350-7#20526#20533
TOTALS19682910-942
📊

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