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BOSTON MARATHON 2025

Zhiyuan Cai

Bib: 10333•M

ON

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 18%
Gender (Male)
#0 / 16105
Top 29%
Masters (Masters Men)
#0 / 10463
Top 15%
Division (M45-49)
#0 / 2386
Top 19%
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
7:01/mi
21:48
↑ 97↓ 3451.5%
10K· 6.21 mi
7:07/mi
43:54
↑ 79↓ 1380.4%
15K· 9.32 mi
7:00/mi
1:05:38
↑ 67↓ 78
20K· 12.43 mi
7:00/mi
1:27:22
↑ 106↓ 860.1%
Half· 13.11 mi
6:50/mi
1:32:02
↑ 19↓ 370.5%
25K· 15.53 mi
6:52/mi
1:48:42
↑ 66↓ 880.2%
30K· 18.64 mi
7:02/mi
2:10:34
↑ 181↓ 1480.2%
20M
6:56/mi
2:19:59
↑ 64↓ 500.2%
21M
7:24/mi
2:27:23
↑ 106↓ 241.6%
35K· 21.75 mi
6:41/mi
2:32:23
↑ 17↓ 861.7%
23M
6:32/mi
2:40:34
↑ 23↓ 630.6%
24M
6:30/mi
2:47:04
↓ 821.3%
40K· 24.85 mi
6:53/mi
2:52:57
↓ 200.3%
25.2M
7:27/mi
2:55:31
↑ 13↓ 160.2%
Finish· 26.22 mi
6:26/mi
3:02:04
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:32:02
Pace7:01 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:30:02
Pace6:52 /mi
📊Negative Split: 2.2% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:47:3021:487:0121:48
7:01
-
10K
6.21 mi11:09:3643:547:0422:06
7:07
+0:06
15K
9.32 mi11:31:201:05:387:0321:44
7:00
-0:07
20K
12.43 mi11:53:041:27:227:0221:44
7:00
0:00
Half
13.11 mi11:57:441:32:027:014:40
6:50
-0:10
25K
15.53 mi12:14:241:48:427:0016:40
6:52
+0:02
30K
18.64 mi12:36:162:10:347:0021:52
7:02
+0:10
20M
20.00 mi12:45:412:19:597:009:25
6:56
-0:06
21M
21.00 mi12:53:052:27:237:017:24
7:24
+0:28
35K
21.75 mi12:58:052:32:237:005:00
6:41
-0:43
23M
23.00 mi13:06:162:40:346:598:11
6:32
-0:09
24M
24.00 mi13:12:462:47:046:586:30
6:30
-0:02
40K
24.85 mi13:18:392:52:576:585:53
6:53
+0:23
25.2M
25.20 mi13:21:132:55:316:582:34
7:27
+0:34
Finish
26.22 mi13:27:463:02:046:576:33
6:26
-1:01

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

6:26 /mi

Average Pace

6:57 /mi

Slowest Pace

7:27 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:30:00

82% of race

Time at Steady Pace

32:04

18% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:57 /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 mi10:47:3021:487:0121:48
7:01
#7940
10K
6.21 mi11:09:3643:547:0422:06
7:07
#8378
15K
9.32 mi11:31:201:05:387:0321:44
7:00
#8047
20K
12.43 mi11:53:041:27:227:0221:44
7:00
#7689
Half
13.11 mi11:57:441:32:027:014:40
6:50
#7622
25K
15.53 mi12:14:241:48:427:0016:40
6:52
#7249
30K
18.64 mi12:36:162:10:347:0021:52
7:02
#6700
20M
20.00 mi12:45:412:19:597:009:25
6:56
#6380
21M
21.00 mi12:53:052:27:237:017:24
7:24
#6197
35K
21.75 mi12:58:052:32:237:005:00
6:41
#6069
23M
23.00 mi13:06:162:40:346:598:11
6:32
#5686
24M
24.00 mi13:12:462:47:046:586:30
6:30
#5464
40K
24.85 mi13:18:392:52:576:585:53
6:53
#5340
25.2M
25.20 mi13:21:132:55:316:582:34
7:27
#5282
Finish
26.22 mi13:27:463:02:046:576:33
6:26
#5130
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi7940695769577584(Top 27%)6666(Top 41%)6666(Top 279%)
10K6.21 mi3.10 mi8378-4387218-2617218-2618764(Top 31%)7449(Top 46%)7449(Top 312%)
15K9.32 mi3.11 mi8047+3317005+2137005+2137584(Top 27%)6666(Top 41%)6666(Top 279%)
20K12.43 mi3.11 mi7689+3586759+2466759+2466837(Top 24%)6080(Top 38%)6080(Top 255%)
Half13.11 mi0.68 mi7622+676710+496710+496403(Top 23%)5743(Top 36%)5743(Top 241%)
25K15.53 mi2.42 mi7249+3736430+2806430+2805449(Top 19%)4953(Top 31%)4953(Top 208%)
30K18.64 mi3.11 mi6700+5495981+4495981+4494923(Top 17%)4471(Top 28%)4471(Top 187%)
20M20.00 mi1.36 mi6380+3205725+2565725+2563693(Top 13%)3399(Top 21%)3399(Top 142%)
21M21.00 mi1.00 mi6197+1835561+1645561+1644109(Top 14%)3707(Top 23%)3707(Top 155%)
35K21.75 mi0.75 mi6069+1285448+1135448+1133406(Top 12%)3105(Top 19%)3105(Top 130%)
23M23.00 mi1.25 mi5686+3835136+3125136+3121594(Top 6%)1492(Top 9%)1492(Top 63%)
24M24.00 mi1.00 mi5464+2224954+1824954+1822055(Top 7%)1908(Top 12%)1908(Top 80%)
40K24.85 mi0.85 mi5340+1244844+1104844+1103260(Top 11%)2912(Top 18%)2912(Top 122%)
25.2M25.20 mi0.35 mi5282+584792+524792+523149(Top 11%)2790(Top 17%)2790(Top 117%)
Finish26.22 mi1.02 mi5130+1524656+1364656+1362452(Top 9%)2232(Top 14%)2232(Top 94%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 27%
×21story building
+97ft-345ft

Overall

7584

Males

6666

M45-49

6666

5K→10K

3.1 - 6.2 mi

Top 31%
×5story building
+79ft-138ft

Overall

8764

Males

7449

M45-49

7449

10K→15K

6.2 - 9.3 mi

Top 27%
×3story building
+67ft-78ft

Overall

7584

Males

6666

M45-49

6666

15K→20K

9.3 - 12.4 mi

Top 24%
×5story building
+106ft-86ft

Overall

6837

Males

6080

M45-49

6080

20K→Half

12.4 - 13.1 mi

Top 23%
×2story building
+19ft-37ft

Overall

6403

Males

5743

M45-49

5743

Half→25K

13.1 - 15.5 mi

Top 19%
×4story building
+66ft-88ft

Overall

5449

Males

4953

M45-49

4953

25K→30K

15.5 - 18.6 mi

Top 17%
×9story building
+181ft-148ft

Overall

4923

Males

4471

M45-49

4471

30K→20M

18.6 - 20.0 mi

Top 13%
×5story building
+64ft-50ft

Overall

3693

Males

3399

M45-49

3399

20M→21M

20.0 - 21.0 mi

Top 14%
×8story building
+106ft-24ft

Overall

4109

Males

3707

M45-49

3707

21M→35K

21.0 - 21.8 mi

Top 12%
×7story building
+17ft-86ft

Overall

3406

Males

3105

M45-49

3105

35K→23M

21.8 - 23.0 mi

Top 6%
×5story building
+23ft-63ft

Overall

1594

Males

1492

M45-49

1492

23M→24M

23.0 - 24.0 mi

Top 7%
×6story building
+12ft-82ft

Overall

2055

Males

1908

M45-49

1908

24M→40K

24.0 - 24.9 mi

Top 11%
×1story
+6ft-20ft

Overall

3260

Males

2912

M45-49

2912

40K→25.2M

24.9 - 25.2 mi

Top 11%
×1story
+13ft-16ft

Overall

3149

Males

2790

M45-49

2790

25.2M→Finish

25.2 - 26.2 mi

Top 9%
×2story building
+22ft-21ft

Overall

2452

Males

2232

M45-49

2232

Passing Analysis

Category:
Athletes Passed
3369
Passed By
559
Net Change
+2810
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7940
5K → 10K73511-438#7940#8378
10K → 15K35524+331#8378#8047
15K → 20K37012+358#8047#7689
20K → Half703+67#7689#7622
Half → 25K3730+373#7622#7249
25K → 30K5523+549#7249#6700
30K → 20M3211+320#6700#6380
20M → 21M1841+183#6380#6197
21M → 35K1291+128#6197#6069
35K → 23M3830+383#6069#5686
23M → 24M2231+222#5686#5464
24M → 40K1240+124#5464#5340
40K → 25.2M602+58#5340#5282
25.2M → Finish1520+152#5282#5130
TOTALS3369559+2810
📊

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