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BOSTON MARATHON 2025

Bi Libiao

Bib: 9448•M

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:25
Rank: #4373
Start → 5K
20:25 | 6:34/mi
10K· 6.21 mi
42:29
Rank: #6646 (-2273)
5K → 10K
22:04 | 7:06/mi
15K· 9.32 mi
1:05:06
Rank: #7657 (-1011)
10K → 15K
22:37 | 7:17/mi
20K· 12.43 mi
1:29:37
Rank: #9093 (-1436)
15K → 20K
24:31 | 7:53/mi
Half· 13.11 mi
1:35:27
Rank: #9706 (-613)
20K → Half
5:50 | 8:33/mi
25K· 15.53 mi
1:55:48
Rank: #10932 (-1226)
Half → 25K
20:21 | 8:24/mi
30K· 18.64 mi
2:25:23
Rank: #13075 (-2143)
25K → 30K
29:35 | 9:31/mi
20M
2:38:33
Rank: #13737 (-662)
30K → 20M
13:10 | 9:41/mi
21M
2:51:22
Rank: #15101 (-1364)
20M → 21M
12:49 | 12:49/mi
35K· 21.75 mi
3:00:21
Rank: #15927 (-826)
21M → 35K
8:59 | 12:00/mi
23M
3:13:07
Rank: #16309 (-382)
35K → 23M
12:46 | 10:12/mi
24M
3:22:52
Rank: #16572 (-263)
23M → 24M
9:45 | 9:45/mi
40K· 24.85 mi
3:31:01
Rank: #16671 (-99)
24M → 40K
8:09 | 9:32/mi
25.2M
3:34:33
Rank: #16707 (-36)
40K → 25.2M
3:32 | 10:15/mi
Finish· 26.22 mi
3:43:29
Rank: #16737 (-30)
25.2M → Finish
8:56 | 8:46/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:27
Pace7:17 /mi
2nd Half
Distance13.11 mi
Time2:08:02
Pace9:46 /mi
📊Positive Split: 34.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:45:5720:256:3420:25
6:34
-
10K
6.21 mi11:08:0142:296:5022:04
7:06
+0:32
15K
9.32 mi11:30:381:05:066:5922:37
7:17
+0:11
20K
12.43 mi11:55:091:29:377:1324:31
7:53
+0:36
Half
13.11 mi12:00:591:35:277:175:50
8:33
+0:40
25K
15.53 mi12:21:201:55:487:2720:21
8:24
-0:09
30K
18.64 mi12:50:552:25:237:4829:35
9:31
+1:07
20M
20.00 mi13:04:052:38:337:5613:10
9:41
+0:10
21M
21.00 mi13:16:542:51:228:1012:49
12:49
+3:08
35K
21.75 mi13:25:533:00:218:188:59
12:00
-0:49
23M
23.00 mi13:38:393:13:078:2412:46
10:12
-1:48
24M
24.00 mi13:48:243:22:528:279:45
9:45
-0:27
40K
24.85 mi13:56:333:31:018:298:09
9:32
-0:13
25.2M
25.20 mi14:00:053:34:338:313:32
10:15
+0:43
Finish
26.22 mi14:09:013:43:298:328:56
8:46
-1:29

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

6:34 /mi

Average Pace

8:32 /mi

Slowest Pace

12:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:55:48

52% of race

Time at Steady Pace

1:25:53

38% of race

Time at Slower Pace

21:48

10% of race

Average Pace: 8:31 /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 mi10:45:5720:256:3420:25
6:34
#4373
10K
6.21 mi11:08:0142:296:5022:04
7:06
#6646
15K
9.32 mi11:30:381:05:066:5922:37
7:17
#7657
20K
12.43 mi11:55:091:29:377:1324:31
7:53
#9093
Half
13.11 mi12:00:591:35:277:175:50
8:33
#9706
25K
15.53 mi12:21:201:55:487:2720:21
8:24
#10932
30K
18.64 mi12:50:552:25:237:4829:35
9:31
#13075
20M
20.00 mi13:04:052:38:337:5613:10
9:41
#13737
21M
21.00 mi13:16:542:51:228:1012:49
12:49
#15101
35K
21.75 mi13:25:533:00:218:188:59
12:00
#15927
23M
23.00 mi13:38:393:13:078:2412:46
10:12
#16309
24M
24.00 mi13:48:243:22:528:279:45
9:45
#16572
40K
24.85 mi13:56:333:31:018:298:09
9:32
#16671
25.2M
25.20 mi14:00:053:34:338:313:32
10:15
#16707
Finish
26.22 mi14:09:013:43:298:328:56
8:46
#16737
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi4373411041109828(Top 35%)7991(Top 50%)7991(Top 356%)
10K6.21 mi3.10 mi6646-22736024-19146024-19148699(Top 31%)7421(Top 46%)7421(Top 330%)
15K9.32 mi3.11 mi7657-10116746-7226746-7229828(Top 35%)7991(Top 50%)7991(Top 356%)
20K12.43 mi3.11 mi9093-14367615-8697615-86914003(Top 49%)9870(Top 61%)9870(Top 439%)
Half13.11 mi0.68 mi9706-6137945-3307945-33019462(Top 69%)12226(Top 76%)12226(Top 544%)
25K15.53 mi2.42 mi10932-12268550-6058550-60516519(Top 58%)10882(Top 68%)10882(Top 484%)
30K18.64 mi3.11 mi13075-21439444-8949444-89420020(Top 70%)12293(Top 76%)12293(Top 547%)
20M20.00 mi1.36 mi13737-6629715-2719715-27119888(Top 70%)12113(Top 75%)12113(Top 539%)
21M21.00 mi1.00 mi15101-136410274-55910274-55924803(Top 87%)14271(Top 89%)14271(Top 635%)
35K21.75 mi0.75 mi15927-82610603-32910603-32925859(Top 91%)14757(Top 92%)14757(Top 657%)
23M23.00 mi1.25 mi16309-38210744-14110744-14121086(Top 74%)12428(Top 77%)12428(Top 553%)
24M24.00 mi1.00 mi16572-26310829-8510829-8520542(Top 72%)12118(Top 75%)12118(Top 539%)
40K24.85 mi0.85 mi16671-9910830-110830-118822(Top 66%)11231(Top 70%)11231(Top 500%)
25.2M25.20 mi0.35 mi16707-3610832-210832-218023(Top 63%)10823(Top 67%)10823(Top 482%)
Finish26.22 mi1.02 mi16737-3010820+1210820+1217855(Top 63%)10803(Top 67%)10803(Top 481%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 35%
×21stories
+97ft-345ft

Overall

9828

Males

7991

M40-44

7991

5K→10K

3.1 - 6.2 mi

Top 31%
×5stories
+79ft-138ft

Overall

8699

Males

7421

M40-44

7421

10K→15K

6.2 - 9.3 mi

Top 35%
×3stories
+67ft-78ft

Overall

9828

Males

7991

M40-44

7991

15K→20K

9.3 - 12.4 mi

Top 49%
×5stories
+106ft-86ft

Overall

14003

Males

9870

M40-44

9870

20K→Half

12.4 - 13.1 mi

Top 69%
×2stories
+19ft-37ft

Overall

19462

Males

12226

M40-44

12226

Half→25K

13.1 - 15.5 mi

Top 58%
×4stories
+66ft-88ft

Overall

16519

Males

10882

M40-44

10882

25K→30K

15.5 - 18.6 mi

Top 70%
×9stories
+181ft-148ft

Overall

20020

Males

12293

M40-44

12293

30K→20M

18.6 - 20.0 mi

Top 70%
×5stories
+64ft-50ft

Overall

19888

Males

12113

M40-44

12113

20M→21M

20.0 - 21.0 mi

Top 87%
×8stories
+106ft-24ft

Overall

24803

Males

14271

M40-44

14271

21M→35K

21.0 - 21.8 mi

Top 91%
×7stories
+17ft-86ft

Overall

25859

Males

14757

M40-44

14757

35K→23M

21.8 - 23.0 mi

Top 74%
×5stories
+23ft-63ft

Overall

21086

Males

12428

M40-44

12428

23M→24M

23.0 - 24.0 mi

Top 72%
×6stories
+12ft-82ft

Overall

20542

Males

12118

M40-44

12118

24M→40K

24.0 - 24.9 mi

Top 66%
×1story
+6ft-20ft

Overall

18822

Males

11231

M40-44

11231

40K→25.2M

24.9 - 25.2 mi

Top 63%
×1story
+13ft-16ft

Overall

18023

Males

10823

M40-44

10823

25.2M→Finish

25.2 - 26.2 mi

Top 63%
×2stories
+22ft-21ft

Overall

17855

Males

10803

M40-44

10803

Passing Analysis

Category:
Athletes Passed
327
Passed By
12689
Net Change
-12364
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4373
5K → 10K52278-2273#4373#6646
10K → 15K171028-1011#6646#7657
15K → 20K141450-1436#7657#9093
20K → Half0613-613#9093#9706
Half → 25K251249-1226#9706#10932
25K → 30K192162-2143#10932#13075
30K → 20M28690-662#13075#13737
20M → 21M81372-1364#13737#15101
21M → 35K4830-826#15101#15927
35K → 23M43425-382#15927#16309
23M → 24M27290-263#16309#16572
24M → 40K56155-99#16572#16671
40K → 25.2M2056-36#16671#16707
25.2M → Finish6191-30#16707#16737
TOTALS32712689-12364
📊

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