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BOSTON MARATHON 2025

Yifeng Zheng

Bib: 8129•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 18%
Gender (Male)
#0 / 16105
Top 28%
Masters (Masters Men)
#0 / 10463
Top 14%
Division (M40-44)
#0 / 2247
Top 36%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:28
Rank: #4481
Start → 5K
20:28 | 6:35/mi
10K· 6.21 mi
41:13
Rank: #4754 (-273)
5K → 10K
20:45 | 6:41/mi
15K· 9.32 mi
1:01:58
Rank: #4781 (-27)
10K → 15K
20:45 | 6:41/mi
20K· 12.43 mi
1:22:50
Rank: #4693 (+88)
15K → 20K
20:52 | 6:43/mi
Half· 13.11 mi
1:27:30
Rank: #4766 (-73)
20K → Half
4:40 | 6:50/mi
25K· 15.53 mi
1:43:49
Rank: #4652 (+114)
Half → 25K
16:19 | 6:44/mi
30K· 18.64 mi
2:05:17
Rank: #4495 (+157)
25K → 30K
21:28 | 6:55/mi
20M
2:14:47
Rank: #4420 (+75)
30K → 20M
9:30 | 6:59/mi
21M
2:22:28
Rank: #4484 (-64)
20M → 21M
7:41 | 7:41/mi
35K· 21.75 mi
2:27:44
Rank: #4506 (-22)
21M → 35K
5:16 | 7:02/mi
23M
2:37:13
Rank: #4667 (-161)
35K → 23M
9:29 | 7:34/mi
24M
2:44:41
Rank: #4813 (-146)
23M → 24M
7:28 | 7:28/mi
40K· 24.85 mi
2:51:19
Rank: #4973 (-160)
24M → 40K
6:38 | 7:45/mi
25.2M
2:54:10
Rank: #4994 (-21)
40K → 25.2M
2:51 | 8:16/mi
Finish· 26.22 mi
3:01:32
Rank: #5020 (-26)
25.2M → Finish
7:22 | 7:14/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:30
Pace6:40 /mi
2nd Half
Distance13.11 mi
Time1:34:02
Pace7:10 /mi
📊Positive Split: 7.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:27:4020:286:3520:28
6:35
-
10K
6.21 mi10:48:2541:136:3820:45
6:41
+0:06
15K
9.32 mi11:09:101:01:586:3920:45
6:41
0:00
20K
12.43 mi11:30:021:22:506:4020:52
6:43
+0:02
Half
13.11 mi11:34:421:27:306:404:40
6:50
+0:07
25K
15.53 mi11:51:011:43:496:4116:19
6:44
-0:06
30K
18.64 mi12:12:292:05:176:4321:28
6:55
+0:11
20M
20.00 mi12:21:592:14:476:449:30
6:59
+0:04
21M
21.00 mi12:29:402:22:286:477:41
7:41
+0:42
35K
21.75 mi12:34:562:27:446:485:16
7:02
-0:39
23M
23.00 mi12:44:252:37:136:509:29
7:34
+0:32
24M
24.00 mi12:51:532:44:416:527:28
7:28
-0:06
40K
24.85 mi12:58:312:51:196:546:38
7:45
+0:17
25.2M
25.20 mi13:01:222:54:106:552:51
8:16
+0:31
Finish
26.22 mi13:08:443:01:326:567:22
7:14
-1:02

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

6:35 /mi

Average Pace

6:56 /mi

Slowest Pace

8:16 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:39:09

55% of race

Time at Steady Pace

40:54

23% of race

Time at Slower Pace

41:29

23% of race

Average Pace: 6:55 /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 mi10:27:4020:286:3520:28
6:35
#4481
10K
6.21 mi10:48:2541:136:3820:45
6:41
#4754
15K
9.32 mi11:09:101:01:586:3920:45
6:41
#4781
20K
12.43 mi11:30:021:22:506:4020:52
6:43
#4693
Half
13.11 mi11:34:421:27:306:404:40
6:50
#4766
25K
15.53 mi11:51:011:43:496:4116:19
6:44
#4652
30K
18.64 mi12:12:292:05:176:4321:28
6:55
#4495
20M
20.00 mi12:21:592:14:476:449:30
6:59
#4420
21M
21.00 mi12:29:402:22:286:477:41
7:41
#4484
35K
21.75 mi12:34:562:27:446:485:16
7:02
#4506
23M
23.00 mi12:44:252:37:136:509:29
7:34
#4667
24M
24.00 mi12:51:532:44:416:527:28
7:28
#4813
40K
24.85 mi12:58:312:51:196:546:38
7:45
#4973
25.2M
25.20 mi13:01:222:54:106:552:51
8:16
#4994
Finish
26.22 mi13:08:443:01:326:567:22
7:14
#5020
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi4481421342134872(Top 17%)4543(Top 28%)4543(Top 202%)
10K6.21 mi3.10 mi4754-2734450-2374450-2375141(Top 18%)4784(Top 30%)4784(Top 213%)
15K9.32 mi3.11 mi4781-274471-214471-214872(Top 17%)4543(Top 28%)4543(Top 202%)
20K12.43 mi3.11 mi4693+884381+904381+904579(Top 16%)4257(Top 26%)4257(Top 189%)
Half13.11 mi0.68 mi4766-734445-644445-646401(Top 23%)5741(Top 36%)5741(Top 255%)
25K15.53 mi2.42 mi4652+1144338+1074338+1074346(Top 15%)4028(Top 25%)4028(Top 179%)
30K18.64 mi3.11 mi4495+1574194+1444194+1444136(Top 15%)3803(Top 24%)3803(Top 169%)
20M20.00 mi1.36 mi4420+754119+754119+754052(Top 14%)3712(Top 23%)3712(Top 165%)
21M21.00 mi1.00 mi4484-644162-434162-435539(Top 20%)4749(Top 29%)4749(Top 211%)
35K21.75 mi0.75 mi4506-224175-134175-135583(Top 20%)4771(Top 30%)4771(Top 212%)
23M23.00 mi1.25 mi4667-1614301-1264301-1267046(Top 25%)5599(Top 35%)5599(Top 249%)
24M24.00 mi1.00 mi4813-1464416-1154416-1157416(Top 26%)5763(Top 36%)5763(Top 256%)
40K24.85 mi0.85 mi4973-1604541-1254541-1258422(Top 30%)6196(Top 38%)6196(Top 276%)
25.2M25.20 mi0.35 mi4994-214556-154556-157330(Top 26%)5495(Top 34%)5495(Top 245%)
Finish26.22 mi1.02 mi5020-264564-84564-87183(Top 25%)5430(Top 34%)5430(Top 242%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 17%
×21stories
+97ft-345ft

Overall

4872

Males

4543

M40-44

4543

5K→10K

3.1 - 6.2 mi

Top 18%
×5stories
+79ft-138ft

Overall

5141

Males

4784

M40-44

4784

10K→15K

6.2 - 9.3 mi

Top 17%
×3stories
+67ft-78ft

Overall

4872

Males

4543

M40-44

4543

15K→20K

9.3 - 12.4 mi

Top 16%
×5stories
+106ft-86ft

Overall

4579

Males

4257

M40-44

4257

20K→Half

12.4 - 13.1 mi

Top 23%
×2stories
+19ft-37ft

Overall

6401

Males

5741

M40-44

5741

Half→25K

13.1 - 15.5 mi

Top 15%
×4stories
+66ft-88ft

Overall

4346

Males

4028

M40-44

4028

25K→30K

15.5 - 18.6 mi

Top 15%
×9stories
+181ft-148ft

Overall

4136

Males

3803

M40-44

3803

30K→20M

18.6 - 20.0 mi

Top 14%
×5stories
+64ft-50ft

Overall

4052

Males

3712

M40-44

3712

20M→21M

20.0 - 21.0 mi

Top 20%
×8stories
+106ft-24ft

Overall

5539

Males

4749

M40-44

4749

21M→35K

21.0 - 21.8 mi

Top 20%
×7stories
+17ft-86ft

Overall

5583

Males

4771

M40-44

4771

35K→23M

21.8 - 23.0 mi

Top 25%
×5stories
+23ft-63ft

Overall

7046

Males

5599

M40-44

5599

23M→24M

23.0 - 24.0 mi

Top 26%
×6stories
+12ft-82ft

Overall

7416

Males

5763

M40-44

5763

24M→40K

24.0 - 24.9 mi

Top 30%
×1story
+6ft-20ft

Overall

8422

Males

6196

M40-44

6196

40K→25.2M

24.9 - 25.2 mi

Top 26%
×1story
+13ft-16ft

Overall

7330

Males

5495

M40-44

5495

25.2M→Finish

25.2 - 26.2 mi

Top 25%
×2stories
+22ft-21ft

Overall

7183

Males

5430

M40-44

5430

Passing Analysis

Category:
Athletes Passed
1065
Passed By
1604
Net Change
-539
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4481
5K → 10K71344-273#4481#4754
10K → 15K102129-27#4754#4781
15K → 20K16678+88#4781#4693
20K → Half679-73#4693#4766
Half → 25K16046+114#4766#4652
25K → 30K22164+157#4652#4495
30K → 20M11237+75#4495#4420
20M → 21M50114-64#4420#4484
21M → 35K4163-22#4484#4506
35K → 23M40201-161#4506#4667
23M → 24M26172-146#4667#4813
24M → 40K22182-160#4813#4973
40K → 25.2M1940-21#4973#4994
25.2M → Finish2955-26#4994#5020
TOTALS10651604-539
📊

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