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BOSTON MARATHON 2025

Joseph Lasceski

Bib: 12020•M

MI

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 44%
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Top 47%
Division (M50-54)
#0 / 1996
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
7:07/mi
22:06
↑ 97↓ 3451.5%
10K· 6.21 mi
7:06/mi
44:08
↑ 79↓ 1380.4%
15K· 9.32 mi
7:03/mi
1:06:01
↑ 67↓ 78
20K· 12.43 mi
8:02/mi
1:30:59
↑ 106↓ 860.1%
Half· 13.11 mi
7:15/mi
1:35:56
↑ 19↓ 370.5%
25K· 15.53 mi
8:30/mi
1:56:32
↑ 66↓ 880.2%
30K· 18.64 mi
8:31/mi
2:23:01
↑ 181↓ 1480.2%
20M
8:42/mi
2:34:51
↑ 64↓ 500.2%
21M
9:33/mi
2:44:24
↑ 106↓ 241.6%
35K· 21.75 mi
8:21/mi
2:50:39
↑ 17↓ 861.7%
23M
8:49/mi
3:01:41
↑ 23↓ 630.6%
24M
8:13/mi
3:09:54
↓ 821.3%
40K· 24.85 mi
8:35/mi
3:17:14
↓ 200.3%
25.2M
8:36/mi
3:20:12
↑ 13↓ 160.2%
Finish· 26.22 mi
7:38/mi
3:27:59
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:56
Pace7:19 /mi
2nd Half
Distance13.11 mi
Time1:52:03
Pace8:33 /mi
📊Positive Split: 16.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:5122:067:0722:06
7:07
-
10K
6.21 mi11:11:5344:087:0622:02
7:06
-0:01
15K
9.32 mi11:33:461:06:017:0521:53
7:03
-0:03
20K
12.43 mi11:58:441:30:597:1924:58
8:02
+0:59
Half
13.11 mi12:03:411:35:567:194:57
7:15
-0:47
25K
15.53 mi12:24:171:56:327:3020:36
8:30
+1:15
30K
18.64 mi12:50:462:23:017:4026:29
8:31
+0:01
20M
20.00 mi13:02:362:34:517:4511:50
8:42
+0:11
21M
21.00 mi13:12:092:44:247:509:33
9:33
+0:51
35K
21.75 mi13:18:242:50:397:516:15
8:21
-1:12
23M
23.00 mi13:29:263:01:417:5411:02
8:49
+0:28
24M
24.00 mi13:37:393:09:547:558:13
8:13
-0:36
40K
24.85 mi13:44:593:17:147:567:20
8:35
+0:22
25.2M
25.20 mi13:47:573:20:127:572:58
8:36
+0:01
Finish
26.22 mi13:55:443:27:597:567:47
7:38
-0:58

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

7:03 /mi

Average Pace

7:56 /mi

Slowest Pace

9:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:18:45

38% of race

Time at Steady Pace

1:48:39

52% of race

Time at Slower Pace

20:35

10% of race

Average Pace: 7:56 /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 mi10:49:5122:067:0722:06
7:07
#8762
10K
6.21 mi11:11:5344:087:0622:02
7:06
#8657
15K
9.32 mi11:33:461:06:017:0521:53
7:03
#8353
20K
12.43 mi11:58:441:30:597:1924:58
8:02
#10062
Half
13.11 mi12:03:411:35:567:194:57
7:15
#10029
25K
15.53 mi12:24:171:56:327:3020:36
8:30
#11345
30K
18.64 mi12:50:462:23:017:4026:29
8:31
#12013
20M
20.00 mi13:02:362:34:517:4511:50
8:42
#12261
21M
21.00 mi13:12:092:44:247:509:33
9:33
#12520
35K
21.75 mi13:18:242:50:397:516:15
8:21
#12590
23M
23.00 mi13:29:263:01:417:5411:02
8:49
#12754
24M
24.00 mi13:37:393:09:547:558:13
8:13
#12734
40K
24.85 mi13:44:593:17:147:567:20
8:35
#12780
25.2M
25.20 mi13:47:573:20:127:572:58
8:36
#12708
Finish
26.22 mi13:55:443:27:597:567:47
7:38
#12581
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi8762747874787916(Top 28%)6896(Top 43%)6896(Top 345%)
10K6.21 mi3.10 mi8657+1057394+847394+848607(Top 30%)7370(Top 46%)7370(Top 369%)
15K9.32 mi3.11 mi8353+3047193+2017193+2017916(Top 28%)6896(Top 43%)6896(Top 345%)
20K12.43 mi3.11 mi10062-17098139-9468139-94615174(Top 53%)10391(Top 65%)10391(Top 521%)
Half13.11 mi0.68 mi10029+338116+238116+239597(Top 34%)7832(Top 49%)7832(Top 392%)
25K15.53 mi2.42 mi11345-13168750-6348750-63417158(Top 60%)11157(Top 69%)11157(Top 559%)
30K18.64 mi3.11 mi12013-6688982-2328982-23214894(Top 52%)10005(Top 62%)10005(Top 501%)
20M20.00 mi1.36 mi12261-2489056-749056-7415086(Top 53%)9950(Top 62%)9950(Top 498%)
21M21.00 mi1.00 mi12520-2599139-839139-8316272(Top 57%)10364(Top 64%)10364(Top 519%)
35K21.75 mi0.75 mi12590-709148-99148-914575(Top 51%)9529(Top 59%)9529(Top 477%)
23M23.00 mi1.25 mi12754-1649190-429190-4215157(Top 53%)9692(Top 60%)9692(Top 486%)
24M24.00 mi1.00 mi12734+209156+349156+3412663(Top 45%)8489(Top 53%)8489(Top 425%)
40K24.85 mi0.85 mi12780-469138+189138+1813903(Top 49%)8952(Top 56%)8952(Top 448%)
25.2M25.20 mi0.35 mi12708+729098+409098+409414(Top 33%)6666(Top 41%)6666(Top 334%)
Finish26.22 mi1.02 mi12581+1279010+889010+8810215(Top 36%)7101(Top 44%)7101(Top 356%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 28%
×21story building
+97ft-345ft

Overall

7916

Males

6896

M50-54

6896

5K→10K

3.1 - 6.2 mi

Top 30%
×5story building
+79ft-138ft

Overall

8607

Males

7370

M50-54

7370

10K→15K

6.2 - 9.3 mi

Top 28%
×3story building
+67ft-78ft

Overall

7916

Males

6896

M50-54

6896

15K→20K

9.3 - 12.4 mi

Top 53%
×5story building
+106ft-86ft

Overall

15174

Males

10391

M50-54

10391

20K→Half

12.4 - 13.1 mi

Top 34%
×2story building
+19ft-37ft

Overall

9597

Males

7832

M50-54

7832

Half→25K

13.1 - 15.5 mi

Top 60%
×4story building
+66ft-88ft

Overall

17158

Males

11157

M50-54

11157

25K→30K

15.5 - 18.6 mi

Top 52%
×9story building
+181ft-148ft

Overall

14894

Males

10005

M50-54

10005

30K→20M

18.6 - 20.0 mi

Top 53%
×5story building
+64ft-50ft

Overall

15086

Males

9950

M50-54

9950

20M→21M

20.0 - 21.0 mi

Top 57%
×8story building
+106ft-24ft

Overall

16272

Males

10364

M50-54

10364

21M→35K

21.0 - 21.8 mi

Top 51%
×7story building
+17ft-86ft

Overall

14575

Males

9529

M50-54

9529

35K→23M

21.8 - 23.0 mi

Top 53%
×5story building
+23ft-63ft

Overall

15157

Males

9692

M50-54

9692

23M→24M

23.0 - 24.0 mi

Top 45%
×6story building
+12ft-82ft

Overall

12663

Males

8489

M50-54

8489

24M→40K

24.0 - 24.9 mi

Top 49%
×1story
+6ft-20ft

Overall

13903

Males

8952

M50-54

8952

40K→25.2M

24.9 - 25.2 mi

Top 33%
×1story
+13ft-16ft

Overall

9414

Males

6666

M50-54

6666

25.2M→Finish

25.2 - 26.2 mi

Top 36%
×2story building
+22ft-21ft

Overall

10215

Males

7101

M50-54

7101

Passing Analysis

Category:
Athletes Passed
1368
Passed By
5184
Net Change
-3819
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8762
5K → 10K260155+105#8762#8657
10K → 15K33733+304#8657#8353
15K → 20K181725-1709#8353#10062
20K → Half4916+33#10062#10029
Half → 25K171332-1316#10029#11345
25K → 30K93761-668#11345#12013
30K → 20M62310-248#12013#12261
20M → 21M39298-259#12261#12520
21M → 35K51121-70#12520#12590
35K → 23M66230-164#12590#12754
23M → 24M8565+20#12754#12734
24M → 40K63109-46#12734#12780
40K → 25.2M797+72#12780#12708
25.2M → Finish14922+127#12708#12581
TOTALS13685184-3819
📊

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