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BOSTON MARATHON 2025

Zhongbao Liang

Bib: 5554•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 12%
Gender (Male)
#0 / 16105
Top 20%
Division (M18-39)
#0 / 5642
Top 44%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:37
Rank: #4906
Start → 5K
6:38/mi
20:37 split
10K· 6.21 mi
41:19
Rank: #4922 (-16)
5K → 10K
6:40/mi
20:42 split
15K· 9.32 mi
1:02:08
Rank: #4931 (-9)
10K → 15K
6:42/mi
20:49 split
20K· 12.43 mi
1:23:08
Rank: #4906 (+25)
15K → 20K
6:46/mi
21:00 split
Half· 13.11 mi
1:27:35
Rank: #4842 (+64)
20K → Half
6:31/mi
4:27 split
25K· 15.53 mi
1:43:48
Rank: #4644 (+198)
Half → 25K
6:41/mi
16:13 split
30K· 18.64 mi
2:05:05
Rank: #4395 (+249)
25K → 30K
6:51/mi
21:17 split
20M
2:14:28
Rank: #4291 (+104)
30K → 20M
6:54/mi
9:23 split
21M
2:21:40
Rank: #4179 (+112)
20M → 21M
7:12/mi
7:12 split
35K· 21.75 mi
2:26:41
Rank: #4137 (+42)
21M → 35K
6:42/mi
5:01 split
23M
2:35:15
Rank: #4024 (+113)
35K → 23M
6:51/mi
8:34 split
24M
2:41:46
Rank: #3895 (+129)
23M → 24M
6:31/mi
6:31 split
40K· 24.85 mi
2:47:18
Rank: #3743 (+152)
24M → 40K
6:28/mi
5:32 split
25.2M
2:49:42
Rank: #3653 (+90)
40K → 25.2M
6:58/mi
2:24 split
Finish· 26.22 mi
2:56:11
Rank: #3539 (+114)
25.2M → Finish
6:22/mi
6:29 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:35
Pace6:41 /mi
2nd Half
Distance13.11 mi
Time1:28:36
Pace6:46 /mi
📊Positive Split: 1.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:4120:376:3820:37
6:38
-
10K
6.21 mi10:45:2341:196:3920:42
6:40
+0:02
15K
9.32 mi11:06:121:02:086:4020:49
6:42
+0:02
20K
12.43 mi11:27:121:23:086:4121:00
6:46
+0:04
Half
13.11 mi11:31:391:27:356:414:27
6:31
-0:15
25K
15.53 mi11:47:521:43:486:4116:13
6:41
+0:10
30K
18.64 mi12:09:092:05:056:4321:17
6:51
+0:10
20M
20.00 mi12:18:322:14:286:439:23
6:54
+0:03
21M
21.00 mi12:25:442:21:406:457:12
7:12
+0:18
35K
21.75 mi12:30:452:26:416:455:01
6:42
-0:30
23M
23.00 mi12:39:192:35:156:458:34
6:51
+0:09
24M
24.00 mi12:45:502:41:466:446:31
6:31
-0:20
40K
24.85 mi12:51:222:47:186:445:32
6:28
-0:03
25.2M
25.20 mi12:53:462:49:426:442:24
6:58
+0:30
Finish
26.22 mi13:00:152:56:116:436:29
6:22
-0:36

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

6:22 /mi

Average Pace

6:43 /mi

Slowest Pace

7:12 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:48:59

96% of race

Time at Steady Pace

7:12

4% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:43 /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 mi10:24:4120:376:3820:37
6:38
#4906
10K
6.21 mi10:45:2341:196:3920:42
6:40
#4922
15K
9.32 mi11:06:121:02:086:4020:49
6:42
#4931
20K
12.43 mi11:27:121:23:086:4121:00
6:46
#4906
Half
13.11 mi11:31:391:27:356:414:27
6:31
#4842
25K
15.53 mi11:47:521:43:486:4116:13
6:41
#4644
30K
18.64 mi12:09:092:05:056:4321:17
6:51
#4395
20M
20.00 mi12:18:322:14:286:439:23
6:54
#4291
21M
21.00 mi12:25:442:21:406:457:12
7:12
#4179
35K
21.75 mi12:30:452:26:416:455:01
6:42
#4137
23M
23.00 mi12:39:192:35:156:458:34
6:51
#4024
24M
24.00 mi12:45:502:41:466:446:31
6:31
#3895
40K
24.85 mi12:51:222:47:186:445:32
6:28
#3743
25.2M
25.20 mi12:53:462:49:426:442:24
6:58
#3653
Finish
26.22 mi13:00:152:56:116:436:29
6:22
#3539
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi4906459145915075(Top 18%)4710(Top 29%)4710(Top 83%)
10K6.21 mi3.10 mi4922-164593-24593-25006(Top 18%)4672(Top 29%)4672(Top 83%)
15K9.32 mi3.11 mi4931-94600-74600-75075(Top 18%)4710(Top 29%)4710(Top 83%)
20K12.43 mi3.11 mi4906+254573+274573+274916(Top 17%)4544(Top 28%)4544(Top 81%)
Half13.11 mi0.68 mi4842+644513+604513+603868(Top 14%)3648(Top 23%)3648(Top 65%)
25K15.53 mi2.42 mi4644+1984330+1834330+1834055(Top 14%)3779(Top 23%)3779(Top 67%)
30K18.64 mi3.11 mi4395+2494107+2234107+2233755(Top 13%)3474(Top 22%)3474(Top 62%)
20M20.00 mi1.36 mi4291+1044010+974010+973566(Top 13%)3288(Top 20%)3288(Top 58%)
21M21.00 mi1.00 mi4179+1123901+1093901+1093155(Top 11%)2912(Top 18%)2912(Top 52%)
35K21.75 mi0.75 mi4137+423857+443857+443573(Top 13%)3246(Top 20%)3246(Top 58%)
23M23.00 mi1.25 mi4024+1133746+1113746+1112927(Top 10%)2682(Top 17%)2682(Top 48%)
24M24.00 mi1.00 mi3895+1293624+1223624+1222138(Top 8%)1985(Top 12%)1985(Top 35%)
40K24.85 mi0.85 mi3743+1523492+1323492+1321531(Top 5%)1418(Top 9%)1418(Top 25%)
25.2M25.20 mi0.35 mi3653+903408+843408+841416(Top 5%)1303(Top 8%)1303(Top 23%)
Finish26.22 mi1.02 mi3539+1143301+1073301+1072163(Top 8%)1981(Top 12%)1981(Top 35%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 18%
×21story building
+97ft-345ft

Overall

5075

Males

4710

M18-39

4710

5K→10K

3.1 - 6.2 mi

Top 18%
×5story building
+79ft-138ft

Overall

5006

Males

4672

M18-39

4672

10K→15K

6.2 - 9.3 mi

Top 18%
×3story building
+67ft-78ft

Overall

5075

Males

4710

M18-39

4710

15K→20K

9.3 - 12.4 mi

Top 17%
×5story building
+106ft-86ft

Overall

4916

Males

4544

M18-39

4544

20K→Half

12.4 - 13.1 mi

Top 14%
×2story building
+19ft-37ft

Overall

3868

Males

3648

M18-39

3648

Half→25K

13.1 - 15.5 mi

Top 14%
×4story building
+66ft-88ft

Overall

4055

Males

3779

M18-39

3779

25K→30K

15.5 - 18.6 mi

Top 13%
×9story building
+181ft-148ft

Overall

3755

Males

3474

M18-39

3474

30K→20M

18.6 - 20.0 mi

Top 13%
×5story building
+64ft-50ft

Overall

3566

Males

3288

M18-39

3288

20M→21M

20.0 - 21.0 mi

Top 11%
×8story building
+106ft-24ft

Overall

3155

Males

2912

M18-39

2912

21M→35K

21.0 - 21.8 mi

Top 13%
×7story building
+17ft-86ft

Overall

3573

Males

3246

M18-39

3246

35K→23M

21.8 - 23.0 mi

Top 10%
×5story building
+23ft-63ft

Overall

2927

Males

2682

M18-39

2682

23M→24M

23.0 - 24.0 mi

Top 8%
×6story building
+12ft-82ft

Overall

2138

Males

1985

M18-39

1985

24M→40K

24.0 - 24.9 mi

Top 5%
×1story
+6ft-20ft

Overall

1531

Males

1418

M18-39

1418

40K→25.2M

24.9 - 25.2 mi

Top 5%
×1story
+13ft-16ft

Overall

1416

Males

1303

M18-39

1303

25.2M→Finish

25.2 - 26.2 mi

Top 8%
×2story building
+22ft-21ft

Overall

2163

Males

1981

M18-39

1981

Passing Analysis

Category:
Athletes Passed
1910
Passed By
543
Net Change
+1367
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4906
5K → 10K167183-16#4906#4922
10K → 15K109118-9#4922#4931
15K → 20K144119+25#4931#4906
20K → Half706+64#4906#4842
Half → 25K21214+198#4842#4644
25K → 30K27728+249#4644#4395
30K → 20M12824+104#4395#4291
20M → 21M12513+112#4291#4179
21M → 35K5311+42#4179#4137
35K → 23M12714+113#4137#4024
23M → 24M1356+129#4024#3895
24M → 40K1520+152#3895#3743
40K → 25.2M900+90#3743#3653
25.2M → Finish1217+114#3653#3539
TOTALS1910543+1367
📊

Passing Visuals

Category:
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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