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BOSTON MARATHON 2025

Biao Li

Bib: 8082•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
23:49
Rank: #13645
Start → 5K
23:49 | 7:40/mi
10K· 6.21 mi
48:04
Rank: #14194 (-549)
5K → 10K
24:15 | 7:48/mi
15K· 9.32 mi
1:12:38
Rank: #14555 (-361)
10K → 15K
24:34 | 7:54/mi
20K· 12.43 mi
1:37:37
Rank: #14704 (-149)
15K → 20K
24:59 | 8:02/mi
Half· 13.11 mi
1:42:52
Rank: #14631 (+73)
20K → Half
5:15 | 7:42/mi
25K· 15.53 mi
2:02:46
Rank: #14740 (-109)
Half → 25K
19:54 | 8:12/mi
30K· 18.64 mi
2:30:28
Rank: #15288 (-548)
25K → 30K
27:42 | 8:55/mi
20M
2:42:34
Rank: #15343 (-55)
30K → 20M
12:06 | 8:54/mi
21M
2:52:29
Rank: #15487 (-144)
20M → 21M
9:55 | 9:55/mi
35K· 21.75 mi
2:58:44
Rank: #15447 (+40)
21M → 35K
6:15 | 8:21/mi
23M
3:09:52
Rank: #15421 (+26)
35K → 23M
11:08 | 8:54/mi
24M
3:18:14
Rank: #15318 (+103)
23M → 24M
8:22 | 8:22/mi
40K· 24.85 mi
3:25:27
Rank: #15211 (+107)
24M → 40K
7:13 | 8:26/mi
25.2M
3:28:39
Rank: #15179 (+32)
40K → 25.2M
3:12 | 9:17/mi
Finish· 26.22 mi
3:36:58
Rank: #15094 (+85)
25.2M → Finish
8:19 | 8:10/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:42:52
Pace7:51 /mi
2nd Half
Distance13.11 mi
Time1:54:06
Pace8:42 /mi
📊Positive Split: 10.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:31:5723:497:4023:49
7:40
-
10K
6.21 mi10:56:1248:047:4424:15
7:48
+0:08
15K
9.32 mi11:20:461:12:387:4824:34
7:54
+0:06
20K
12.43 mi11:45:451:37:377:5124:59
8:02
+0:08
Half
13.11 mi11:51:001:42:527:515:15
7:42
-0:20
25K
15.53 mi12:10:542:02:467:5419:54
8:12
+0:30
30K
18.64 mi12:38:362:30:288:0427:42
8:55
+0:43
20M
20.00 mi12:50:422:42:348:0812:06
8:54
-0:01
21M
21.00 mi13:00:372:52:298:139:55
9:55
+1:01
35K
21.75 mi13:06:522:58:448:136:15
8:21
-1:34
23M
23.00 mi13:18:003:09:528:1511:08
8:54
+0:33
24M
24.00 mi13:26:223:18:148:168:22
8:22
-0:32
40K
24.85 mi13:33:353:25:278:167:13
8:26
+0:04
25.2M
25.20 mi13:36:473:28:398:173:12
9:17
+0:51
Finish
26.22 mi13:45:063:36:588:178:19
8:10
-1:07

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

7:40 /mi

Average Pace

8:17 /mi

Slowest Pace

9:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:42:52

47% of race

Time at Steady Pace

50:03

23% of race

Time at Slower Pace

1:04:03

30% of race

Average Pace: 8:16 /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 mi10:31:5723:497:4023:49
7:40
#13645
10K
6.21 mi10:56:1248:047:4424:15
7:48
#14194
15K
9.32 mi11:20:461:12:387:4824:34
7:54
#14555
20K
12.43 mi11:45:451:37:377:5124:59
8:02
#14704
Half
13.11 mi11:51:001:42:527:515:15
7:42
#14631
25K
15.53 mi12:10:542:02:467:5419:54
8:12
#14740
30K
18.64 mi12:38:362:30:288:0427:42
8:55
#15288
20M
20.00 mi12:50:422:42:348:0812:06
8:54
#15343
21M
21.00 mi13:00:372:52:298:139:55
9:55
#15487
35K
21.75 mi13:06:522:58:448:136:15
8:21
#15447
23M
23.00 mi13:18:003:09:528:1511:08
8:54
#15421
24M
24.00 mi13:26:223:18:148:168:22
8:22
#15318
40K
24.85 mi13:33:353:25:278:167:13
8:26
#15211
25.2M
25.20 mi13:36:473:28:398:173:12
9:17
#15179
Finish
26.22 mi13:45:063:36:588:178:19
8:10
#15094
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi136459927992715280(Top 54%)10494(Top 65%)10494(Top 440%)
10K6.21 mi3.10 mi14194-54910099-17210099-17214850(Top 52%)10356(Top 64%)10356(Top 434%)
15K9.32 mi3.11 mi14555-36110221-12210221-12215280(Top 54%)10494(Top 65%)10494(Top 440%)
20K12.43 mi3.11 mi14704-14910252-3110252-3115214(Top 54%)10411(Top 65%)10411(Top 436%)
Half13.11 mi0.68 mi14631+7310222+3010222+3013329(Top 47%)9629(Top 60%)9629(Top 404%)
25K15.53 mi2.42 mi14740-10910226-410226-415358(Top 54%)10386(Top 64%)10386(Top 435%)
30K18.64 mi3.11 mi15288-54810428-20210428-20217228(Top 61%)11030(Top 68%)11030(Top 462%)
20M20.00 mi1.36 mi15343-5510412+1610412+1616233(Top 57%)10450(Top 65%)10450(Top 438%)
21M21.00 mi1.00 mi15487-14410436-2410436-2417951(Top 63%)11133(Top 69%)11133(Top 467%)
35K21.75 mi0.75 mi15447+4010406+3010406+3014587(Top 51%)9541(Top 59%)9541(Top 400%)
23M23.00 mi1.25 mi15421+2610350+5610350+5615620(Top 55%)9902(Top 61%)9902(Top 415%)
24M24.00 mi1.00 mi15318+10310283+6710283+6713653(Top 48%)8979(Top 56%)8979(Top 376%)
40K24.85 mi0.85 mi15211+10710202+8110202+8113033(Top 46%)8548(Top 53%)8548(Top 358%)
25.2M25.20 mi0.35 mi15179+3210182+2010182+2013320(Top 47%)8626(Top 54%)8626(Top 362%)
Finish26.22 mi1.02 mi15094+8510121+6110121+6113994(Top 49%)9014(Top 56%)9014(Top 378%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 54%
×21stories
+97ft-345ft

Overall

15280

Males

10494

M45-49

10494

5K→10K

3.1 - 6.2 mi

Top 52%
×5stories
+79ft-138ft

Overall

14850

Males

10356

M45-49

10356

10K→15K

6.2 - 9.3 mi

Top 54%
×3stories
+67ft-78ft

Overall

15280

Males

10494

M45-49

10494

15K→20K

9.3 - 12.4 mi

Top 54%
×5stories
+106ft-86ft

Overall

15214

Males

10411

M45-49

10411

20K→Half

12.4 - 13.1 mi

Top 47%
×2stories
+19ft-37ft

Overall

13329

Males

9629

M45-49

9629

Half→25K

13.1 - 15.5 mi

Top 54%
×4stories
+66ft-88ft

Overall

15358

Males

10386

M45-49

10386

25K→30K

15.5 - 18.6 mi

Top 61%
×9stories
+181ft-148ft

Overall

17228

Males

11030

M45-49

11030

30K→20M

18.6 - 20.0 mi

Top 57%
×5stories
+64ft-50ft

Overall

16233

Males

10450

M45-49

10450

20M→21M

20.0 - 21.0 mi

Top 63%
×8stories
+106ft-24ft

Overall

17951

Males

11133

M45-49

11133

21M→35K

21.0 - 21.8 mi

Top 51%
×7stories
+17ft-86ft

Overall

14587

Males

9541

M45-49

9541

35K→23M

21.8 - 23.0 mi

Top 55%
×5stories
+23ft-63ft

Overall

15620

Males

9902

M45-49

9902

23M→24M

23.0 - 24.0 mi

Top 48%
×6stories
+12ft-82ft

Overall

13653

Males

8979

M45-49

8979

24M→40K

24.0 - 24.9 mi

Top 46%
×1story
+6ft-20ft

Overall

13033

Males

8548

M45-49

8548

40K→25.2M

24.9 - 25.2 mi

Top 47%
×1story
+13ft-16ft

Overall

13320

Males

8626

M45-49

8626

25.2M→Finish

25.2 - 26.2 mi

Top 49%
×2stories
+22ft-21ft

Overall

13994

Males

9014

M45-49

9014

Passing Analysis

Category:
Athletes Passed
1517
Passed By
2966
Net Change
-1449
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13645
5K → 10K115664-549#13645#14194
10K → 15K104465-361#14194#14555
15K → 20K162311-149#14555#14704
20K → Half796+73#14704#14631
Half → 25K146255-109#14631#14740
25K → 30K114662-548#14740#15288
30K → 20M102157-55#15288#15343
20M → 21M76220-144#15343#15487
21M → 35K7232+40#15487#15447
35K → 23M129103+26#15447#15421
23M → 24M12825+103#15421#15318
24M → 40K12215+107#15318#15211
40K → 25.2M4715+32#15211#15179
25.2M → Finish12136+85#15179#15094
TOTALS15172966-1449
📊

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