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BOSTON MARATHON 2025

Harrison Lei

Bib: 28555•M

NJ

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M50-54)
#0 / 1996
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
30:48
Rank: #25382
Start → 5K
30:48 | 9:55/mi
10K· 6.21 mi
1:00:36
Rank: #24863 (+519)
5K → 10K
29:48 | 9:36/mi
15K· 9.32 mi
1:30:02
Rank: #24463 (+400)
10K → 15K
29:26 | 9:28/mi
20K· 12.43 mi
1:59:16
Rank: #24005 (+458)
15K → 20K
29:14 | 9:25/mi
Half· 13.11 mi
2:05:32
Rank: #23920 (+85)
20K → Half
6:16 | 9:11/mi
25K· 15.53 mi
2:30:26
Rank: #23941 (-21)
Half → 25K
24:54 | 10:16/mi
30K· 18.64 mi
3:05:02
Rank: #24037 (-96)
25K → 30K
34:36 | 11:08/mi
20M
3:21:59
Rank: #24262 (-225)
30K → 20M
16:57 | 12:28/mi
21M
3:34:48
Rank: #24300 (-38)
20M → 21M
12:49 | 12:49/mi
35K· 21.75 mi
3:43:47
Rank: #24382 (-82)
21M → 35K
8:59 | 12:00/mi
23M
3:58:19
Rank: #24401 (-19)
35K → 23M
14:32 | 11:36/mi
24M
4:10:11
Rank: #24472 (-71)
23M → 24M
11:52 | 11:52/mi
40K· 24.85 mi
4:20:43
Rank: #24521 (-49)
24M → 40K
10:32 | 12:19/mi
25.2M
4:25:26
Rank: #24541 (-20)
40K → 25.2M
4:43 | 13:41/mi
Finish· 26.22 mi
4:37:03
Rank: #24617 (-76)
25.2M → Finish
11:37 | 11:24/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:05:32
Pace9:35 /mi
2nd Half
Distance13.11 mi
Time2:31:31
Pace11:33 /mi
📊Positive Split: 20.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:47:4130:489:5530:48
9:55
-
10K
6.21 mi12:17:291:00:369:4529:48
9:36
-0:19
15K
9.32 mi12:46:551:30:029:4029:26
9:28
-0:08
20K
12.43 mi13:16:091:59:169:3629:14
9:25
-0:03
Half
13.11 mi13:22:252:05:329:356:16
9:11
-0:14
25K
15.53 mi13:47:192:30:269:4124:54
10:16
+1:05
30K
18.64 mi14:21:553:05:029:5634:36
11:08
+0:52
20M
20.00 mi14:38:523:21:5910:0616:57
12:28
+1:20
21M
21.00 mi14:51:413:34:4810:1412:49
12:49
+0:21
35K
21.75 mi15:00:403:43:4710:178:59
12:00
-0:49
23M
23.00 mi15:15:123:58:1910:2214:32
11:36
-0:24
24M
24.00 mi15:27:044:10:1110:2511:52
11:52
+0:16
40K
24.85 mi15:37:364:20:4310:2910:32
12:19
+0:27
25.2M
25.20 mi15:42:194:25:2610:324:43
13:41
+1:22
Finish
26.22 mi15:53:564:37:0310:3411:37
11:24
-2:17

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

9:11 /mi

Average Pace

10:34 /mi

Slowest Pace

13:41 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:30:26

54% of race

Time at Steady Pace

1:21:36

29% of race

Time at Slower Pace

45:01

16% of race

Average Pace: 10:34 /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 mi11:47:4130:489:5530:48
9:55
#25382
10K
6.21 mi12:17:291:00:369:4529:48
9:36
#24863
15K
9.32 mi12:46:551:30:029:4029:26
9:28
#24463
20K
12.43 mi13:16:091:59:169:3629:14
9:25
#24005
Half
13.11 mi13:22:252:05:329:356:16
9:11
#23920
25K
15.53 mi13:47:192:30:269:4124:54
10:16
#23941
30K
18.64 mi14:21:553:05:029:5634:36
11:08
#24037
20M
20.00 mi14:38:523:21:5910:0616:57
12:28
#24262
21M
21.00 mi14:51:413:34:4810:1412:49
12:49
#24300
35K
21.75 mi15:00:403:43:4710:178:59
12:00
#24382
23M
23.00 mi15:15:123:58:1910:2214:32
11:36
#24401
24M
24.00 mi15:27:044:10:1110:2511:52
11:52
#24472
40K
24.85 mi15:37:364:20:4310:2910:32
12:19
#24521
25.2M
25.20 mi15:42:194:25:2610:324:43
13:41
#24541
Finish
26.22 mi15:53:564:37:0310:3411:37
11:24
#24617
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi25382148991489923667(Top 83%)14135(Top 88%)14135(Top 708%)
10K6.21 mi3.10 mi24863+51914643+25614643+25624336(Top 86%)14395(Top 89%)14395(Top 721%)
15K9.32 mi3.11 mi24463+40014462+18114462+18123667(Top 83%)14135(Top 88%)14135(Top 708%)
20K12.43 mi3.11 mi24005+45814246+21614246+21622604(Top 80%)13625(Top 85%)13625(Top 683%)
Half13.11 mi0.68 mi23920+8514208+3814208+3822536(Top 79%)13582(Top 84%)13582(Top 680%)
25K15.53 mi2.42 mi23941-2114213-514213-523878(Top 84%)14142(Top 88%)14142(Top 709%)
30K18.64 mi3.11 mi24037-9614226-1314226-1324271(Top 85%)14200(Top 88%)14200(Top 711%)
20M20.00 mi1.36 mi24262-22514309-8314309-8325876(Top 91%)14864(Top 92%)14864(Top 745%)
21M21.00 mi1.00 mi24300-3814306+314306+324814(Top 87%)14282(Top 89%)14282(Top 716%)
35K21.75 mi0.75 mi24382-8214341-3514341-3525867(Top 91%)14765(Top 92%)14765(Top 740%)
23M23.00 mi1.25 mi24401-1914334+714334+724423(Top 86%)14054(Top 87%)14054(Top 704%)
24M24.00 mi1.00 mi24472-7114357-2314357-2325504(Top 90%)14561(Top 90%)14561(Top 730%)
40K24.85 mi0.85 mi24521-4914364-714364-725405(Top 89%)14471(Top 90%)14471(Top 725%)
25.2M25.20 mi0.35 mi24541-2014372-814372-825902(Top 91%)14701(Top 91%)14701(Top 737%)
Finish26.22 mi1.02 mi24617-7614392-2014392-2026000(Top 92%)14785(Top 92%)14785(Top 741%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 83%
×21stories
+97ft-345ft

Overall

23667

Males

14135

M50-54

14135

5K→10K

3.1 - 6.2 mi

Top 86%
×5stories
+79ft-138ft

Overall

24336

Males

14395

M50-54

14395

10K→15K

6.2 - 9.3 mi

Top 83%
×3stories
+67ft-78ft

Overall

23667

Males

14135

M50-54

14135

15K→20K

9.3 - 12.4 mi

Top 80%
×5stories
+106ft-86ft

Overall

22604

Males

13625

M50-54

13625

20K→Half

12.4 - 13.1 mi

Top 79%
×2stories
+19ft-37ft

Overall

22536

Males

13582

M50-54

13582

Half→25K

13.1 - 15.5 mi

Top 84%
×4stories
+66ft-88ft

Overall

23878

Males

14142

M50-54

14142

25K→30K

15.5 - 18.6 mi

Top 85%
×9stories
+181ft-148ft

Overall

24271

Males

14200

M50-54

14200

30K→20M

18.6 - 20.0 mi

Top 91%
×5stories
+64ft-50ft

Overall

25876

Males

14864

M50-54

14864

20M→21M

20.0 - 21.0 mi

Top 87%
×8stories
+106ft-24ft

Overall

24814

Males

14282

M50-54

14282

21M→35K

21.0 - 21.8 mi

Top 91%
×7stories
+17ft-86ft

Overall

25867

Males

14765

M50-54

14765

35K→23M

21.8 - 23.0 mi

Top 86%
×5stories
+23ft-63ft

Overall

24423

Males

14054

M50-54

14054

23M→24M

23.0 - 24.0 mi

Top 90%
×6stories
+12ft-82ft

Overall

25504

Males

14561

M50-54

14561

24M→40K

24.0 - 24.9 mi

Top 89%
×1story
+6ft-20ft

Overall

25405

Males

14471

M50-54

14471

40K→25.2M

24.9 - 25.2 mi

Top 91%
×1story
+13ft-16ft

Overall

25902

Males

14701

M50-54

14701

25.2M→Finish

25.2 - 26.2 mi

Top 92%
×2stories
+22ft-21ft

Overall

26000

Males

14785

M50-54

14785

Passing Analysis

Category:
Athletes Passed
1956
Passed By
1191
Net Change
+765
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25382
5K → 10K54728+519#25382#24863
10K → 15K4099+400#24863#24463
15K → 20K4635+458#24463#24005
20K → Half872+85#24005#23920
Half → 25K115136-21#23920#23941
25K → 30K120216-96#23941#24037
30K → 20M28253-225#24037#24262
20M → 21M5290-38#24262#24300
21M → 35K1698-82#24300#24382
35K → 23M5271-19#24382#24401
23M → 24M2394-71#24401#24472
24M → 40K2069-49#24472#24521
40K → 25.2M626-20#24521#24541
25.2M → Finish1894-76#24541#24617
TOTALS19561191+765
📊

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