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BOSTON MARATHON 2025

Chao Li

Bib: 12388•M

TX

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 41%
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Top 43%
Division (M55-59)
#0 / 1648
Top 27%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:59
Rank: #11284
Start → 5K
22:59 | 7:24/mi
10K· 6.21 mi
46:05
Rank: #11376 (-92)
5K → 10K
23:06 | 7:26/mi
15K· 9.32 mi
1:09:28
Rank: #11553 (-177)
10K → 15K
23:23 | 7:32/mi
20K· 12.43 mi
1:33:12
Rank: #11620 (-67)
15K → 20K
23:44 | 7:38/mi
Half· 13.11 mi
1:38:16
Rank: #11600 (+20)
20K → Half
5:04 | 7:26/mi
25K· 15.53 mi
1:57:00
Rank: #11607 (-7)
Half → 25K
18:44 | 7:44/mi
30K· 18.64 mi
2:22:11
Rank: #11655 (-48)
25K → 30K
25:11 | 8:06/mi
20M
2:33:17
Rank: #11584 (+71)
30K → 20M
11:06 | 8:10/mi
21M
2:42:00
Rank: #11601 (-17)
20M → 21M
8:43 | 8:43/mi
35K· 21.75 mi
2:47:59
Rank: #11610 (-9)
21M → 35K
5:59 | 8:00/mi
23M
2:58:18
Rank: #11575 (+35)
35K → 23M
10:19 | 8:14/mi
24M
3:06:30
Rank: #11597 (-22)
23M → 24M
8:12 | 8:12/mi
40K· 24.85 mi
3:13:26
Rank: #11534 (+63)
24M → 40K
6:56 | 8:07/mi
25.2M
3:16:30
Rank: #11518 (+16)
40K → 25.2M
3:04 | 8:54/mi
Finish· 26.22 mi
3:24:35
Rank: #11532 (-14)
25.2M → Finish
8:05 | 7:56/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:16
Pace7:30 /mi
2nd Half
Distance13.11 mi
Time1:46:19
Pace8:07 /mi
📊Positive Split: 8.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:3722:597:2422:59
7:24
-
10K
6.21 mi11:13:4346:057:2523:06
7:26
+0:02
15K
9.32 mi11:37:061:09:287:2723:23
7:32
+0:06
20K
12.43 mi12:00:501:33:127:3023:44
7:38
+0:06
Half
13.11 mi12:05:541:38:167:305:04
7:26
-0:12
25K
15.53 mi12:24:381:57:007:3218:44
7:44
+0:18
30K
18.64 mi12:49:492:22:117:3825:11
8:06
+0:22
20M
20.00 mi13:00:552:33:177:4011:06
8:10
+0:04
21M
21.00 mi13:09:382:42:007:438:43
8:43
+0:33
35K
21.75 mi13:15:372:47:597:435:59
8:00
-0:43
23M
23.00 mi13:25:562:58:187:4510:19
8:14
+0:14
24M
24.00 mi13:34:083:06:307:468:12
8:12
-0:02
40K
24.85 mi13:41:043:13:267:476:56
8:07
-0:05
25.2M
25.20 mi13:44:083:16:307:483:04
8:54
+0:47
Finish
26.22 mi13:52:133:24:357:498:05
7:56
-0:58

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

7:24 /mi

Average Pace

7:49 /mi

Slowest Pace

8:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:57:00

57% of race

Time at Steady Pace

1:05:29

32% of race

Time at Slower Pace

22:06

11% of race

Average Pace: 7:48 /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 mi10:50:3722:597:2422:59
7:24
#11284
10K
6.21 mi11:13:4346:057:2523:06
7:26
#11376
15K
9.32 mi11:37:061:09:287:2723:23
7:32
#11553
20K
12.43 mi12:00:501:33:127:3023:44
7:38
#11620
Half
13.11 mi12:05:541:38:167:305:04
7:26
#11600
25K
15.53 mi12:24:381:57:007:3218:44
7:44
#11607
30K
18.64 mi12:49:492:22:117:3825:11
8:06
#11655
20M
20.00 mi13:00:552:33:177:4011:06
8:10
#11584
21M
21.00 mi13:09:382:42:007:438:43
8:43
#11601
35K
21.75 mi13:15:372:47:597:435:59
8:00
#11610
23M
23.00 mi13:25:562:58:187:4510:19
8:14
#11575
24M
24.00 mi13:34:083:06:307:468:12
8:12
#11597
40K
24.85 mi13:41:043:13:267:476:56
8:07
#11534
25.2M
25.20 mi13:44:083:16:307:483:04
8:54
#11518
Finish
26.22 mi13:52:133:24:357:498:05
7:56
#11532
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi112848837883711987(Top 42%)9060(Top 56%)9060(Top 550%)
10K6.21 mi3.10 mi11376-928860-238860-2311500(Top 40%)8904(Top 55%)8904(Top 540%)
15K9.32 mi3.11 mi11553-1778918-588918-5811987(Top 42%)9060(Top 56%)9060(Top 550%)
20K12.43 mi3.11 mi11620-678915+38915+311854(Top 42%)8900(Top 55%)8900(Top 540%)
Half13.11 mi0.68 mi11600+208908+78908+711073(Top 39%)8589(Top 53%)8589(Top 521%)
25K15.53 mi2.42 mi11607-78866+428866+4211742(Top 41%)8718(Top 54%)8718(Top 529%)
30K18.64 mi3.11 mi11655-488813+538813+5312130(Top 43%)8746(Top 54%)8746(Top 531%)
20M20.00 mi1.36 mi11584+718738+758738+7511572(Top 41%)8321(Top 52%)8321(Top 505%)
21M21.00 mi1.00 mi11601-178706+328706+3211766(Top 41%)8258(Top 51%)8258(Top 501%)
35K21.75 mi0.75 mi11610-98689+178689+1712223(Top 43%)8428(Top 52%)8428(Top 511%)
23M23.00 mi1.25 mi11575+358628+618628+6111616(Top 41%)8044(Top 50%)8044(Top 488%)
24M24.00 mi1.00 mi11597-228599+298599+2912535(Top 44%)8430(Top 52%)8430(Top 512%)
40K24.85 mi0.85 mi11534+638541+588541+5810920(Top 38%)7530(Top 47%)7530(Top 457%)
25.2M25.20 mi0.35 mi11518+168520+218520+2111145(Top 39%)7551(Top 47%)7551(Top 458%)
Finish26.22 mi1.02 mi11532-148480+408480+4012397(Top 44%)8230(Top 51%)8230(Top 499%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 42%
×21stories
+97ft-345ft

Overall

11987

Males

9060

M55-59

9060

5K→10K

3.1 - 6.2 mi

Top 40%
×5stories
+79ft-138ft

Overall

11500

Males

8904

M55-59

8904

10K→15K

6.2 - 9.3 mi

Top 42%
×3stories
+67ft-78ft

Overall

11987

Males

9060

M55-59

9060

15K→20K

9.3 - 12.4 mi

Top 42%
×5stories
+106ft-86ft

Overall

11854

Males

8900

M55-59

8900

20K→Half

12.4 - 13.1 mi

Top 39%
×2stories
+19ft-37ft

Overall

11073

Males

8589

M55-59

8589

Half→25K

13.1 - 15.5 mi

Top 41%
×4stories
+66ft-88ft

Overall

11742

Males

8718

M55-59

8718

25K→30K

15.5 - 18.6 mi

Top 43%
×9stories
+181ft-148ft

Overall

12130

Males

8746

M55-59

8746

30K→20M

18.6 - 20.0 mi

Top 41%
×5stories
+64ft-50ft

Overall

11572

Males

8321

M55-59

8321

20M→21M

20.0 - 21.0 mi

Top 41%
×8stories
+106ft-24ft

Overall

11766

Males

8258

M55-59

8258

21M→35K

21.0 - 21.8 mi

Top 43%
×7stories
+17ft-86ft

Overall

12223

Males

8428

M55-59

8428

35K→23M

21.8 - 23.0 mi

Top 41%
×5stories
+23ft-63ft

Overall

11616

Males

8044

M55-59

8044

23M→24M

23.0 - 24.0 mi

Top 44%
×6stories
+12ft-82ft

Overall

12535

Males

8430

M55-59

8430

24M→40K

24.0 - 24.9 mi

Top 38%
×1story
+6ft-20ft

Overall

10920

Males

7530

M55-59

7530

40K→25.2M

24.9 - 25.2 mi

Top 39%
×1story
+13ft-16ft

Overall

11145

Males

7551

M55-59

7551

25.2M→Finish

25.2 - 26.2 mi

Top 44%
×2stories
+22ft-21ft

Overall

12397

Males

8230

M55-59

8230

Passing Analysis

Category:
Athletes Passed
1631
Passed By
1879
Net Change
-248
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11284
5K → 10K207299-92#11284#11376
10K → 15K127304-177#11376#11553
15K → 20K152219-67#11553#11620
20K → Half4323+20#11620#11600
Half → 25K163170-7#11600#11607
25K → 30K212260-48#11607#11655
30K → 20M15079+71#11655#11584
20M → 21M99116-17#11584#11601
21M → 35K5665-9#11601#11610
35K → 23M11984+35#11610#11575
23M → 24M83105-22#11575#11597
24M → 40K10239+63#11597#11534
40K → 25.2M4731+16#11534#11518
25.2M → Finish7185-14#11518#11532
TOTALS16311879-248
📊

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