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BOSTON MARATHON 2025

Cheng Zhong

Bib: 3751•M

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 19%
Gender (Male)
#0 / 16105
Top 31%
Masters (Masters Men)
#0 / 10463
Top 17%
Division (M40-44)
#0 / 2247
Top 40%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
6:38/mi
20:37
↑ 97↓ 3451.5%
10K· 6.21 mi
6:36/mi
41:08
↑ 79↓ 1380.4%
15K· 9.32 mi
6:42/mi
1:01:56
↑ 67↓ 78
20K· 12.43 mi
6:45/mi
1:22:55
↑ 106↓ 860.1%
Half· 13.11 mi
6:36/mi
1:27:25
↑ 19↓ 370.5%
25K· 15.53 mi
6:51/mi
1:44:01
↑ 66↓ 880.2%
30K· 18.64 mi
7:16/mi
2:06:35
↑ 181↓ 1480.2%
20M
7:31/mi
2:16:48
↑ 64↓ 500.2%
21M
7:53/mi
2:24:41
↑ 106↓ 241.6%
35K· 21.75 mi
6:54/mi
2:29:51
↑ 17↓ 861.7%
23M
7:34/mi
2:39:19
↑ 23↓ 630.6%
24M
7:23/mi
2:46:42
↓ 821.3%
40K· 24.85 mi
7:49/mi
2:53:23
↓ 200.3%
25.2M
8:48/mi
2:56:25
↑ 13↓ 160.2%
Finish· 26.22 mi
7:26/mi
3:03:59
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:25
Pace6:40 /mi
2nd Half
Distance13.11 mi
Time1:36:34
Pace7:22 /mi
📊Positive Split: 10.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:5620:376:3820:37
6:38
-
10K
6.21 mi10:45:2741:086:3720:31
6:36
-0:02
15K
9.32 mi11:06:151:01:566:3920:48
6:42
+0:06
20K
12.43 mi11:27:141:22:556:4020:59
6:45
+0:03
Half
13.11 mi11:31:441:27:256:404:30
6:36
-0:09
25K
15.53 mi11:48:201:44:016:4216:36
6:51
+0:15
30K
18.64 mi12:10:542:06:356:4722:34
7:16
+0:25
20M
20.00 mi12:21:072:16:486:5010:13
7:31
+0:15
21M
21.00 mi12:29:002:24:416:537:53
7:53
+0:22
35K
21.75 mi12:34:102:29:516:535:10
6:54
-0:59
23M
23.00 mi12:43:382:39:196:569:28
7:34
+0:40
24M
24.00 mi12:51:012:46:426:577:23
7:23
-0:11
40K
24.85 mi12:57:422:53:236:596:41
7:49
+0:26
25.2M
25.20 mi13:00:442:56:257:003:02
8:48
+0:59
Finish
26.22 mi13:08:183:03:597:017:34
7:26
-1:22

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

6:36 /mi

Average Pace

7:01 /mi

Slowest Pace

8:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:49:11

59% of race

Time at Steady Pace

57:12

31% of race

Time at Slower Pace

17:36

10% of race

Average Pace: 7:01 /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 mi10:24:5620:376:3820:37
6:38
#4913
10K
6.21 mi10:45:2741:086:3720:31
6:36
#4655
15K
9.32 mi11:06:151:01:566:3920:48
6:42
#4759
20K
12.43 mi11:27:141:22:556:4020:59
6:45
#4751
Half
13.11 mi11:31:441:27:256:404:30
6:36
#4725
25K
15.53 mi11:48:201:44:016:4216:36
6:51
#4756
30K
18.64 mi12:10:542:06:356:4722:34
7:16
#5077
20M
20.00 mi12:21:072:16:486:5010:13
7:31
#5269
21M
21.00 mi12:29:002:24:416:537:53
7:53
#5357
35K
21.75 mi12:34:102:29:516:535:10
6:54
#5307
23M
23.00 mi12:43:382:39:196:569:28
7:34
#5367
24M
24.00 mi12:51:012:46:426:577:23
7:23
#5381
40K
24.85 mi12:57:422:53:236:596:41
7:49
#5436
25.2M
25.20 mi13:00:442:56:257:003:02
8:48
#5467
Finish
26.22 mi13:08:183:03:597:017:34
7:26
#5520
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi4913459845985034(Top 18%)4679(Top 29%)4679(Top 208%)
10K6.21 mi3.10 mi4655+2584366+2324366+2324513(Top 16%)4229(Top 26%)4229(Top 188%)
15K9.32 mi3.11 mi4759-1044450-844450-845034(Top 18%)4679(Top 29%)4679(Top 208%)
20K12.43 mi3.11 mi4751+84433+174433+174884(Top 17%)4521(Top 28%)4521(Top 201%)
Half13.11 mi0.68 mi4725+264412+214412+214426(Top 16%)4148(Top 26%)4148(Top 185%)
25K15.53 mi2.42 mi4756-314427-154427-155252(Top 18%)4814(Top 30%)4814(Top 214%)
30K18.64 mi3.11 mi5077-3214676-2494676-2496247(Top 22%)5484(Top 34%)5484(Top 244%)
20M20.00 mi1.36 mi5269-1924831-1554831-1557114(Top 25%)5909(Top 37%)5909(Top 263%)
21M21.00 mi1.00 mi5357-884897-664897-666670(Top 23%)5481(Top 34%)5481(Top 244%)
35K21.75 mi0.75 mi5307+504853+444853+444798(Top 17%)4241(Top 26%)4241(Top 189%)
23M23.00 mi1.25 mi5367-604890-374890-376975(Top 25%)5570(Top 35%)5570(Top 248%)
24M24.00 mi1.00 mi5381-144892-24892-26922(Top 24%)5475(Top 34%)5475(Top 244%)
40K24.85 mi0.85 mi5436-554915-234915-238843(Top 31%)6425(Top 40%)6425(Top 286%)
25.2M25.20 mi0.35 mi5467-314934-194934-1910484(Top 37%)7176(Top 45%)7176(Top 319%)
Finish26.22 mi1.02 mi5520-534960-264960-268651(Top 30%)6257(Top 39%)6257(Top 278%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 18%
×21story building
+97ft-345ft

Overall

5034

Males

4679

M40-44

4679

5K→10K

3.1 - 6.2 mi

Top 16%
×5story building
+79ft-138ft

Overall

4513

Males

4229

M40-44

4229

10K→15K

6.2 - 9.3 mi

Top 18%
×3story building
+67ft-78ft

Overall

5034

Males

4679

M40-44

4679

15K→20K

9.3 - 12.4 mi

Top 17%
×5story building
+106ft-86ft

Overall

4884

Males

4521

M40-44

4521

20K→Half

12.4 - 13.1 mi

Top 16%
×2story building
+19ft-37ft

Overall

4426

Males

4148

M40-44

4148

Half→25K

13.1 - 15.5 mi

Top 18%
×4story building
+66ft-88ft

Overall

5252

Males

4814

M40-44

4814

25K→30K

15.5 - 18.6 mi

Top 22%
×9story building
+181ft-148ft

Overall

6247

Males

5484

M40-44

5484

30K→20M

18.6 - 20.0 mi

Top 25%
×5story building
+64ft-50ft

Overall

7114

Males

5909

M40-44

5909

20M→21M

20.0 - 21.0 mi

Top 23%
×8story building
+106ft-24ft

Overall

6670

Males

5481

M40-44

5481

21M→35K

21.0 - 21.8 mi

Top 17%
×7story building
+17ft-86ft

Overall

4798

Males

4241

M40-44

4241

35K→23M

21.8 - 23.0 mi

Top 25%
×5story building
+23ft-63ft

Overall

6975

Males

5570

M40-44

5570

23M→24M

23.0 - 24.0 mi

Top 24%
×6story building
+12ft-82ft

Overall

6922

Males

5475

M40-44

5475

24M→40K

24.0 - 24.9 mi

Top 31%
×1story
+6ft-20ft

Overall

8843

Males

6425

M40-44

6425

40K→25.2M

24.9 - 25.2 mi

Top 37%
×1story
+13ft-16ft

Overall

10484

Males

7176

M40-44

7176

25.2M→Finish

25.2 - 26.2 mi

Top 30%
×2story building
+22ft-21ft

Overall

8651

Males

6257

M40-44

6257

Passing Analysis

Category:
Athletes Passed
1086
Passed By
1693
Net Change
-607
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4913
5K → 10K32567+258#4913#4655
10K → 15K79183-104#4655#4759
15K → 20K128120+8#4759#4751
20K → Half3610+26#4751#4725
Half → 25K92123-31#4725#4756
25K → 30K82403-321#4756#5077
30K → 20M27219-192#5077#5269
20M → 21M54142-88#5269#5357
21M → 35K7020+50#5357#5307
35K → 23M65125-60#5307#5367
23M → 24M4155-14#5367#5381
24M → 40K3893-55#5381#5436
40K → 25.2M1849-31#5436#5467
25.2M → Finish3184-53#5467#5520
TOTALS10861693-607
📊

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