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BOSTON MARATHON 2025

Changsheng Li

Bib: 7444•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 29%
Gender (Male)
#0 / 16105
Top 42%
Masters (Masters Men)
#0 / 10463
Top 30%
Division (M45-49)
#0 / 2386
Top 43%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:15
Rank: #6632
Start → 5K
21:15 | 6:50/mi
10K· 6.21 mi
42:49
Rank: #7085 (-453)
5K → 10K
21:34 | 6:56/mi
15K· 9.32 mi
1:04:41
Rank: #7373 (-288)
10K → 15K
21:52 | 7:02/mi
20K· 12.43 mi
1:27:27
Rank: #7735 (-362)
15K → 20K
22:46 | 7:20/mi
Half· 13.11 mi
1:32:19
Rank: #7766 (-31)
20K → Half
4:52 | 7:08/mi
25K· 15.53 mi
1:50:18
Rank: #7923 (-157)
Half → 25K
17:59 | 7:25/mi
30K· 18.64 mi
2:14:26
Rank: #8120 (-197)
25K → 30K
24:08 | 7:46/mi
20M
2:25:14
Rank: #8233 (-113)
30K → 20M
10:48 | 7:57/mi
21M
2:33:51
Rank: #8347 (-114)
20M → 21M
8:37 | 8:37/mi
35K· 21.75 mi
2:39:46
Rank: #8436 (-89)
21M → 35K
5:55 | 7:55/mi
23M
2:49:31
Rank: #8377 (+59)
35K → 23M
9:45 | 7:47/mi
24M
2:57:18
Rank: #8392 (-15)
23M → 24M
7:47 | 7:47/mi
40K· 24.85 mi
3:04:08
Rank: #8439 (-47)
24M → 40K
6:50 | 8:00/mi
25.2M
3:06:56
Rank: #8376 (+63)
40K → 25.2M
2:48 | 8:07/mi
Finish· 26.22 mi
3:14:08
Rank: #8265 (+111)
25.2M → Finish
7:12 | 7:04/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:32:19
Pace7:03 /mi
2nd Half
Distance13.11 mi
Time1:41:49
Pace7:46 /mi
📊Positive Split: 10.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:27:1821:156:5021:15
6:50
-
10K
6.21 mi10:48:5242:496:5321:34
6:56
+0:06
15K
9.32 mi11:10:441:04:416:5621:52
7:02
+0:06
20K
12.43 mi11:33:301:27:277:0222:46
7:20
+0:18
Half
13.11 mi11:38:221:32:197:034:52
7:08
-0:12
25K
15.53 mi11:56:211:50:187:0617:59
7:25
+0:17
30K
18.64 mi12:20:292:14:267:1324:08
7:46
+0:21
20M
20.00 mi12:31:172:25:147:1610:48
7:57
+0:11
21M
21.00 mi12:39:542:33:517:208:37
8:37
+0:40
35K
21.75 mi12:45:492:39:467:215:55
7:55
-0:42
23M
23.00 mi12:55:342:49:317:229:45
7:47
-0:08
24M
24.00 mi13:03:212:57:187:237:47
7:47
0:00
40K
24.85 mi13:10:113:04:087:256:50
8:00
+0:13
25.2M
25.20 mi13:12:593:06:567:252:48
8:07
+0:07
Finish
26.22 mi13:20:113:14:087:257:12
7:04
-1:03

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

6:50 /mi

Average Pace

7:25 /mi

Slowest Pace

8:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:57:30

61% of race

Time at Steady Pace

1:05:13

34% of race

Time at Slower Pace

11:25

6% of race

Average Pace: 7:24 /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 mi10:27:1821:156:5021:15
6:50
#6632
10K
6.21 mi10:48:5242:496:5321:34
6:56
#7085
15K
9.32 mi11:10:441:04:416:5621:52
7:02
#7373
20K
12.43 mi11:33:301:27:277:0222:46
7:20
#7735
Half
13.11 mi11:38:221:32:197:034:52
7:08
#7766
25K
15.53 mi11:56:211:50:187:0617:59
7:25
#7923
30K
18.64 mi12:20:292:14:267:1324:08
7:46
#8120
20M
20.00 mi12:31:172:25:147:1610:48
7:57
#8233
21M
21.00 mi12:39:542:33:517:208:37
8:37
#8347
35K
21.75 mi12:45:492:39:467:215:55
7:55
#8436
23M
23.00 mi12:55:342:49:317:229:45
7:47
#8377
24M
24.00 mi13:03:212:57:187:237:47
7:47
#8392
40K
24.85 mi13:10:113:04:087:256:50
8:00
#8439
25.2M
25.20 mi13:12:593:06:567:252:48
8:07
#8376
Finish
26.22 mi13:20:113:14:087:257:12
7:04
#8265
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi6632602160217875(Top 28%)6867(Top 43%)6867(Top 288%)
10K6.21 mi3.10 mi7085-4536359-3386359-3387552(Top 27%)6680(Top 41%)6680(Top 280%)
15K9.32 mi3.11 mi7373-2886556-1976556-1977875(Top 28%)6867(Top 43%)6867(Top 288%)
20K12.43 mi3.11 mi7735-3626790-2346790-2349260(Top 33%)7600(Top 47%)7600(Top 319%)
Half13.11 mi0.68 mi7766-316806-166806-168510(Top 30%)7193(Top 45%)7193(Top 301%)
25K15.53 mi2.42 mi7923-1576884-786884-789275(Top 33%)7485(Top 46%)7485(Top 314%)
30K18.64 mi3.11 mi8120-1976940-566940-569660(Top 34%)7506(Top 47%)7506(Top 315%)
20M20.00 mi1.36 mi8233-1136988-486988-4810060(Top 35%)7570(Top 47%)7570(Top 317%)
21M21.00 mi1.00 mi8347-1147021-337021-3311157(Top 39%)7942(Top 49%)7942(Top 333%)
35K21.75 mi0.75 mi8436-897048-277048-2711570(Top 41%)8105(Top 50%)8105(Top 340%)
23M23.00 mi1.25 mi8377+596973+756973+758480(Top 30%)6428(Top 40%)6428(Top 269%)
24M24.00 mi1.00 mi8392-156946+276946+279658(Top 34%)6990(Top 43%)6990(Top 293%)
40K24.85 mi0.85 mi8439-476942+46942+410100(Top 36%)7091(Top 44%)7091(Top 297%)
25.2M25.20 mi0.35 mi8376+636887+556887+556594(Top 23%)5123(Top 32%)5123(Top 215%)
Finish26.22 mi1.02 mi8265+1116787+1006787+1006160(Top 22%)4836(Top 30%)4836(Top 203%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 28%
×21stories
+97ft-345ft

Overall

7875

Males

6867

M45-49

6867

5K→10K

3.1 - 6.2 mi

Top 27%
×5stories
+79ft-138ft

Overall

7552

Males

6680

M45-49

6680

10K→15K

6.2 - 9.3 mi

Top 28%
×3stories
+67ft-78ft

Overall

7875

Males

6867

M45-49

6867

15K→20K

9.3 - 12.4 mi

Top 33%
×5stories
+106ft-86ft

Overall

9260

Males

7600

M45-49

7600

20K→Half

12.4 - 13.1 mi

Top 30%
×2stories
+19ft-37ft

Overall

8510

Males

7193

M45-49

7193

Half→25K

13.1 - 15.5 mi

Top 33%
×4stories
+66ft-88ft

Overall

9275

Males

7485

M45-49

7485

25K→30K

15.5 - 18.6 mi

Top 34%
×9stories
+181ft-148ft

Overall

9660

Males

7506

M45-49

7506

30K→20M

18.6 - 20.0 mi

Top 35%
×5stories
+64ft-50ft

Overall

10060

Males

7570

M45-49

7570

20M→21M

20.0 - 21.0 mi

Top 39%
×8stories
+106ft-24ft

Overall

11157

Males

7942

M45-49

7942

21M→35K

21.0 - 21.8 mi

Top 41%
×7stories
+17ft-86ft

Overall

11570

Males

8105

M45-49

8105

35K→23M

21.8 - 23.0 mi

Top 30%
×5stories
+23ft-63ft

Overall

8480

Males

6428

M45-49

6428

23M→24M

23.0 - 24.0 mi

Top 34%
×6stories
+12ft-82ft

Overall

9658

Males

6990

M45-49

6990

24M→40K

24.0 - 24.9 mi

Top 36%
×1story
+6ft-20ft

Overall

10100

Males

7091

M45-49

7091

40K→25.2M

24.9 - 25.2 mi

Top 23%
×1story
+13ft-16ft

Overall

6594

Males

5123

M45-49

5123

25.2M→Finish

25.2 - 26.2 mi

Top 22%
×2stories
+22ft-21ft

Overall

6160

Males

4836

M45-49

4836

Passing Analysis

Category:
Athletes Passed
1044
Passed By
2677
Net Change
-1633
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6632
5K → 10K70523-453#6632#7085
10K → 15K64352-288#7085#7373
15K → 20K53415-362#7373#7735
20K → Half1445-31#7735#7766
Half → 25K72229-157#7766#7923
25K → 30K129326-197#7923#8120
30K → 20M74187-113#8120#8233
20M → 21M57171-114#8233#8347
21M → 35K40129-89#8347#8436
35K → 23M12869+59#8436#8377
23M → 24M7691-15#8377#8392
24M → 40K62109-47#8392#8439
40K → 25.2M729+63#8439#8376
25.2M → Finish13322+111#8376#8265
TOTALS10442677-1633
📊

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