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BOSTON MARATHON 2025

Jianwu Zhong

Bib: 21311•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M60-64)
#0 / 1259
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:39
Rank: #18448
Start → 5K
8:15/mi
25:39 split
10K· 6.21 mi
51:50
Rank: #18861 (-413)
5K → 10K
8:26/mi
26:11 split
15K· 9.32 mi
1:17:36
Rank: #18559 (+302)
10K → 15K
8:18/mi
25:46 split
20K· 12.43 mi
1:47:01
Rank: #19928 (-1369)
15K → 20K
9:28/mi
29:25 split
Half· 13.11 mi
1:53:07
Rank: #20007 (-79)
20K → Half
8:56/mi
6:06 split
25K· 15.53 mi
2:14:47
Rank: #19924 (+83)
Half → 25K
8:56/mi
21:40 split
30K· 18.64 mi
2:44:15
Rank: #19923 (+1)
25K → 30K
9:29/mi
29:28 split
20M
2:56:59
Rank: #19828 (+95)
30K → 20M
9:22/mi
12:44 split
21M
3:06:15
Rank: #19529 (+299)
20M → 21M
9:16/mi
9:16 split
35K· 21.75 mi
3:12:43
Rank: #19420 (+109)
21M → 35K
8:39/mi
6:28 split
23M
3:23:59
Rank: #19242 (+178)
35K → 23M
9:00/mi
11:16 split
24M
3:32:44
Rank: #19107 (+135)
23M → 24M
8:45/mi
8:45 split
40K· 24.85 mi
3:40:33
Rank: #19002 (+105)
24M → 40K
9:09/mi
7:49 split
25.2M
3:43:58
Rank: #18966 (+36)
40K → 25.2M
9:54/mi
3:25 split
Finish· 26.22 mi
3:52:42
Rank: #18890 (+76)
25.2M → Finish
8:34/mi
8:44 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:53:07
Pace8:38 /mi
2nd Half
Distance13.11 mi
Time1:59:35
Pace9:07 /mi
📊Positive Split: 5.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:0725:398:1525:39
8:15
-
10K
6.21 mi11:49:1851:508:2126:11
8:26
+0:11
15K
9.32 mi12:15:041:17:368:2025:46
8:18
-0:08
20K
12.43 mi12:44:291:47:018:3729:25
9:28
+1:10
Half
13.11 mi12:50:351:53:078:386:06
8:56
-0:32
25K
15.53 mi13:12:152:14:478:4121:40
8:56
0:00
30K
18.64 mi13:41:432:44:158:4929:28
9:29
+0:33
20M
20.00 mi13:54:272:56:598:5112:44
9:22
-0:07
21M
21.00 mi14:03:433:06:158:529:16
9:16
-0:06
35K
21.75 mi14:10:113:12:438:526:28
8:39
-0:37
23M
23.00 mi14:21:273:23:598:5211:16
9:00
+0:21
24M
24.00 mi14:30:123:32:448:528:45
8:45
-0:15
40K
24.85 mi14:38:013:40:338:527:49
9:09
+0:24
25.2M
25.20 mi14:41:263:43:588:533:25
9:54
+0:45
Finish
26.22 mi14:50:103:52:428:538:44
8:34
-1:20

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

8:15 /mi

Average Pace

8:53 /mi

Slowest Pace

9:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:32:48

40% of race

Time at Steady Pace

55:36

24% of race

Time at Slower Pace

1:24:18

36% of race

Average Pace: 8:52 /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 mi11:23:0725:398:1525:39
8:15
#18448
10K
6.21 mi11:49:1851:508:2126:11
8:26
#18861
15K
9.32 mi12:15:041:17:368:2025:46
8:18
#18559
20K
12.43 mi12:44:291:47:018:3729:25
9:28
#19928
Half
13.11 mi12:50:351:53:078:386:06
8:56
#20007
25K
15.53 mi13:12:152:14:478:4121:40
8:56
#19924
30K
18.64 mi13:41:432:44:158:4929:28
9:29
#19923
20M
20.00 mi13:54:272:56:598:5112:44
9:22
#19828
21M
21.00 mi14:03:433:06:158:529:16
9:16
#19529
35K
21.75 mi14:10:113:12:438:526:28
8:39
#19420
23M
23.00 mi14:21:273:23:598:5211:16
9:00
#19242
24M
24.00 mi14:30:123:32:448:528:45
8:45
#19107
40K
24.85 mi14:38:013:40:338:527:49
9:09
#19002
25.2M
25.20 mi14:41:263:43:588:533:25
9:54
#18966
Finish
26.22 mi14:50:103:52:428:538:44
8:34
#18890
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi18448117871178717998(Top 63%)11631(Top 72%)11631(Top 924%)
10K6.21 mi3.10 mi18861-41311980-19311980-19319352(Top 68%)12216(Top 76%)12216(Top 970%)
15K9.32 mi3.11 mi18559+30211847+13311847+13317998(Top 63%)11631(Top 72%)11631(Top 924%)
20K12.43 mi3.11 mi19928-136912439-59212439-59222794(Top 80%)13702(Top 85%)13702(Top 1088%)
Half13.11 mi0.68 mi20007-7912470-3112470-3121532(Top 76%)13136(Top 82%)13136(Top 1043%)
25K15.53 mi2.42 mi19924+8312430+4012430+4019605(Top 69%)12232(Top 76%)12232(Top 972%)
30K18.64 mi3.11 mi19923+112385+4512385+4519871(Top 70%)12226(Top 76%)12226(Top 971%)
20M20.00 mi1.36 mi19828+9512323+6212323+6218607(Top 66%)11502(Top 71%)11502(Top 914%)
21M21.00 mi1.00 mi19529+29912170+15312170+15314962(Top 53%)9774(Top 61%)9774(Top 776%)
35K21.75 mi0.75 mi19420+10912109+6112109+6116321(Top 57%)10330(Top 64%)10330(Top 820%)
23M23.00 mi1.25 mi19242+17812003+10612003+10616236(Top 57%)10183(Top 63%)10183(Top 809%)
24M24.00 mi1.00 mi19107+13511928+7511928+7516015(Top 56%)10045(Top 62%)10045(Top 798%)
40K24.85 mi0.85 mi19002+10511847+8111847+8117076(Top 60%)10417(Top 65%)10417(Top 827%)
25.2M25.20 mi0.35 mi18966+3611823+2411823+2416581(Top 58%)10174(Top 63%)10174(Top 808%)
Finish26.22 mi1.02 mi18890+7611768+5511768+5516666(Top 59%)10240(Top 64%)10240(Top 813%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 63%
×21story building
+97ft-345ft

Overall

17998

Males

11631

M60-64

11631

5K→10K

3.1 - 6.2 mi

Top 68%
×5story building
+79ft-138ft

Overall

19352

Males

12216

M60-64

12216

10K→15K

6.2 - 9.3 mi

Top 63%
×3story building
+67ft-78ft

Overall

17998

Males

11631

M60-64

11631

15K→20K

9.3 - 12.4 mi

Top 80%
×5story building
+106ft-86ft

Overall

22794

Males

13702

M60-64

13702

20K→Half

12.4 - 13.1 mi

Top 76%
×2story building
+19ft-37ft

Overall

21532

Males

13136

M60-64

13136

Half→25K

13.1 - 15.5 mi

Top 69%
×4story building
+66ft-88ft

Overall

19605

Males

12232

M60-64

12232

25K→30K

15.5 - 18.6 mi

Top 70%
×9story building
+181ft-148ft

Overall

19871

Males

12226

M60-64

12226

30K→20M

18.6 - 20.0 mi

Top 66%
×5story building
+64ft-50ft

Overall

18607

Males

11502

M60-64

11502

20M→21M

20.0 - 21.0 mi

Top 53%
×8story building
+106ft-24ft

Overall

14962

Males

9774

M60-64

9774

21M→35K

21.0 - 21.8 mi

Top 57%
×7story building
+17ft-86ft

Overall

16321

Males

10330

M60-64

10330

35K→23M

21.8 - 23.0 mi

Top 57%
×5story building
+23ft-63ft

Overall

16236

Males

10183

M60-64

10183

23M→24M

23.0 - 24.0 mi

Top 56%
×6story building
+12ft-82ft

Overall

16015

Males

10045

M60-64

10045

24M→40K

24.0 - 24.9 mi

Top 60%
×1story
+6ft-20ft

Overall

17076

Males

10417

M60-64

10417

40K→25.2M

24.9 - 25.2 mi

Top 58%
×1story
+13ft-16ft

Overall

16581

Males

10174

M60-64

10174

25.2M→Finish

25.2 - 26.2 mi

Top 59%
×2story building
+22ft-21ft

Overall

16666

Males

10240

M60-64

10240

Passing Analysis

Category:
Athletes Passed
2138
Passed By
2580
Net Change
-442
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18448
5K → 10K115528-413#18448#18861
10K → 15K37472+302#18861#18559
15K → 20K221391-1369#18559#19928
20K → Half1493-79#19928#20007
Half → 25K196113+83#20007#19924
25K → 30K227226+1#19924#19923
30K → 20M15257+95#19923#19828
20M → 21M3045+299#19828#19529
21M → 35K1189+109#19529#19420
35K → 23M19517+178#19420#19242
23M → 24M14510+135#19242#19107
24M → 40K12621+105#19107#19002
40K → 25.2M459+36#19002#18966
25.2M → Finish10529+76#18966#18890
TOTALS21382580-442
📊

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