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BOSTON MARATHON 2025

Zifeng Lu

Bib: 8047•M

IL

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M40-44)
#0 / 2247
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
8:09/mi
25:18
↑ 97↓ 3451.5%
10K· 6.21 mi
8:13/mi
50:50
↑ 79↓ 1380.4%
15K· 9.32 mi
8:20/mi
1:16:43
↑ 67↓ 78
20K· 12.43 mi
8:33/mi
1:43:18
↑ 106↓ 860.1%
Half· 13.11 mi
8:26/mi
1:49:03
↑ 19↓ 370.5%
25K· 15.53 mi
8:36/mi
2:09:54
↑ 66↓ 880.2%
30K· 18.64 mi
9:09/mi
2:38:19
↑ 181↓ 1480.2%
20M
9:20/mi
2:51:00
↑ 64↓ 500.2%
21M
9:34/mi
3:00:34
↑ 106↓ 241.6%
35K· 21.75 mi
8:44/mi
3:07:06
↑ 17↓ 861.7%
23M
9:41/mi
3:19:13
↑ 23↓ 630.6%
24M
8:56/mi
3:28:09
↓ 821.3%
40K· 24.85 mi
9:28/mi
3:36:15
↓ 200.3%
25.2M
10:38/mi
3:39:55
↑ 13↓ 160.2%
Finish· 26.22 mi
8:32/mi
3:48:37
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:03
Pace8:19 /mi
2nd Half
Distance13.11 mi
Time1:59:34
Pace9:07 /mi
📊Positive Split: 9.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:4125:188:0925:18
8:09
-
10K
6.21 mi11:44:1350:508:1125:32
8:13
+0:04
15K
9.32 mi12:10:061:16:438:1425:53
8:20
+0:07
20K
12.43 mi12:36:411:43:188:1926:35
8:33
+0:13
Half
13.11 mi12:42:261:49:038:195:45
8:26
-0:07
25K
15.53 mi13:03:172:09:548:2220:51
8:36
+0:10
30K
18.64 mi13:31:422:38:198:3028:25
9:09
+0:33
20M
20.00 mi13:44:232:51:008:3312:41
9:20
+0:11
21M
21.00 mi13:53:573:00:348:369:34
9:34
+0:14
35K
21.75 mi14:00:293:07:068:366:32
8:44
-0:50
23M
23.00 mi14:12:363:19:138:4012:07
9:41
+0:57
24M
24.00 mi14:21:323:28:098:408:56
8:56
-0:45
40K
24.85 mi14:29:383:36:158:428:06
9:28
+0:32
25.2M
25.20 mi14:33:183:39:558:443:40
10:38
+1:10
Finish
26.22 mi14:42:003:48:378:448:42
8:32
-2:06

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

8:09 /mi

Average Pace

8:44 /mi

Slowest Pace

10:38 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:16:43

34% of race

Time at Steady Pace

1:17:21

34% of race

Time at Slower Pace

1:14:33

33% of race

Average Pace: 8:43 /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 mi11:18:4125:188:0925:18
8:09
#17673
10K
6.21 mi11:44:1350:508:1125:32
8:13
#17841
15K
9.32 mi12:10:061:16:438:1425:53
8:20
#17964
20K
12.43 mi12:36:411:43:188:1926:35
8:33
#18069
Half
13.11 mi12:42:261:49:038:195:45
8:26
#18080
25K
15.53 mi13:03:172:09:548:2220:51
8:36
#17995
30K
18.64 mi13:31:422:38:198:3028:25
9:09
#18058
20M
20.00 mi13:44:232:51:008:3312:41
9:20
#18095
21M
21.00 mi13:53:573:00:348:369:34
9:34
#18005
35K
21.75 mi14:00:293:07:068:366:32
8:44
#17947
23M
23.00 mi14:12:363:19:138:4012:07
9:41
#18046
24M
24.00 mi14:21:323:28:098:408:56
8:56
#17979
40K
24.85 mi14:29:383:36:158:428:06
9:28
#18016
25.2M
25.20 mi14:33:183:39:558:443:40
10:38
#18058
Finish
26.22 mi14:42:003:48:378:448:42
8:32
#17985
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi17673114841148418253(Top 64%)11733(Top 73%)11733(Top 522%)
10K6.21 mi3.10 mi17841-16811555-7111555-7118004(Top 63%)11658(Top 72%)11658(Top 519%)
15K9.32 mi3.11 mi17964-12311606-5111606-5118253(Top 64%)11733(Top 73%)11733(Top 522%)
20K12.43 mi3.11 mi18069-10511645-3911645-3918566(Top 65%)11850(Top 74%)11850(Top 527%)
Half13.11 mi0.68 mi18080-1111643+211643+218696(Top 66%)11905(Top 74%)11905(Top 530%)
25K15.53 mi2.42 mi17995+8511587+5611587+5617794(Top 63%)11439(Top 71%)11439(Top 509%)
30K18.64 mi3.11 mi18058-6311578+911578+918375(Top 65%)11555(Top 72%)11555(Top 514%)
20M20.00 mi1.36 mi18095-3711570+811570+818425(Top 65%)11413(Top 71%)11413(Top 508%)
21M21.00 mi1.00 mi18005+9011518+5211518+5216366(Top 58%)10416(Top 65%)10416(Top 464%)
35K21.75 mi0.75 mi17947+5811481+3711481+3716869(Top 59%)10565(Top 66%)10565(Top 470%)
23M23.00 mi1.25 mi18046-9911478+311478+319357(Top 68%)11599(Top 72%)11599(Top 516%)
24M24.00 mi1.00 mi17979+6711420+5811420+5817004(Top 60%)10461(Top 65%)10461(Top 466%)
40K24.85 mi0.85 mi18016-3711412+811412+818588(Top 65%)11115(Top 69%)11115(Top 495%)
25.2M25.20 mi0.35 mi18058-4211425-1311425-1319438(Top 68%)11512(Top 71%)11512(Top 512%)
Finish26.22 mi1.02 mi17985+7311374+5111374+5116437(Top 58%)10130(Top 63%)10130(Top 451%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 64%
×21story building
+97ft-345ft

Overall

18253

Males

11733

M40-44

11733

5K→10K

3.1 - 6.2 mi

Top 63%
×5story building
+79ft-138ft

Overall

18004

Males

11658

M40-44

11658

10K→15K

6.2 - 9.3 mi

Top 64%
×3story building
+67ft-78ft

Overall

18253

Males

11733

M40-44

11733

15K→20K

9.3 - 12.4 mi

Top 65%
×5story building
+106ft-86ft

Overall

18566

Males

11850

M40-44

11850

20K→Half

12.4 - 13.1 mi

Top 66%
×2story building
+19ft-37ft

Overall

18696

Males

11905

M40-44

11905

Half→25K

13.1 - 15.5 mi

Top 63%
×4story building
+66ft-88ft

Overall

17794

Males

11439

M40-44

11439

25K→30K

15.5 - 18.6 mi

Top 65%
×9story building
+181ft-148ft

Overall

18375

Males

11555

M40-44

11555

30K→20M

18.6 - 20.0 mi

Top 65%
×5story building
+64ft-50ft

Overall

18425

Males

11413

M40-44

11413

20M→21M

20.0 - 21.0 mi

Top 58%
×8story building
+106ft-24ft

Overall

16366

Males

10416

M40-44

10416

21M→35K

21.0 - 21.8 mi

Top 59%
×7story building
+17ft-86ft

Overall

16869

Males

10565

M40-44

10565

35K→23M

21.8 - 23.0 mi

Top 68%
×5story building
+23ft-63ft

Overall

19357

Males

11599

M40-44

11599

23M→24M

23.0 - 24.0 mi

Top 60%
×6story building
+12ft-82ft

Overall

17004

Males

10461

M40-44

10461

24M→40K

24.0 - 24.9 mi

Top 65%
×1story
+6ft-20ft

Overall

18588

Males

11115

M40-44

11115

40K→25.2M

24.9 - 25.2 mi

Top 68%
×1story
+13ft-16ft

Overall

19438

Males

11512

M40-44

11512

25.2M→Finish

25.2 - 26.2 mi

Top 58%
×2story building
+22ft-21ft

Overall

16437

Males

10130

M40-44

10130

Passing Analysis

Category:
Athletes Passed
1665
Passed By
1977
Net Change
-312
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17673
5K → 10K212380-168#17673#17841
10K → 15K147270-123#17841#17964
15K → 20K158263-105#17964#18069
20K → Half3445-11#18069#18080
Half → 25K206121+85#18080#17995
25K → 30K218281-63#17995#18058
30K → 20M110147-37#18058#18095
20M → 21M13747+90#18095#18005
21M → 35K8527+58#18005#17947
35K → 23M77176-99#17947#18046
23M → 24M10639+67#18046#17979
24M → 40K5693-37#17979#18016
40K → 25.2M1557-42#18016#18058
25.2M → Finish10431+73#18058#17985
TOTALS16651977-312
📊

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