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BOSTON MARATHON 2025

Janusz Blach

Bib: 14091•M

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

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
7:05/mi
21:59
↑ 97↓ 3451.5%
10K· 6.21 mi
7:40/mi
45:49
↑ 79↓ 1380.4%
15K· 9.32 mi
9:05/mi
1:14:01
↑ 67↓ 78
20K· 12.43 mi
8:34/mi
1:40:39
↑ 106↓ 860.1%
Half· 13.11 mi
8:10/mi
1:46:13
↑ 19↓ 370.5%
25K· 15.53 mi
8:35/mi
2:07:02
↑ 66↓ 880.2%
30K· 18.64 mi
8:45/mi
2:34:14
↑ 181↓ 1480.2%
20M
8:45/mi
2:46:07
↑ 64↓ 500.2%
21M
8:59/mi
2:55:06
↑ 106↓ 241.6%
35K· 21.75 mi
8:15/mi
3:01:16
↑ 17↓ 861.7%
23M
8:38/mi
3:12:04
↑ 23↓ 630.6%
24M
8:16/mi
3:20:20
↓ 821.3%
40K· 24.85 mi
8:16/mi
3:27:24
↓ 200.3%
25.2M
8:56/mi
3:30:29
↑ 13↓ 160.2%
Finish· 26.22 mi
7:52/mi
3:38:30
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:46:13
Pace8:06 /mi
2nd Half
Distance13.11 mi
Time1:52:17
Pace8:34 /mi
📊Positive Split: 5.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:0521:597:0521:59
7:05
-
10K
6.21 mi11:15:5545:497:2223:50
7:40
+0:35
15K
9.32 mi11:44:071:14:017:5628:12
9:05
+1:25
20K
12.43 mi12:10:451:40:398:0626:38
8:34
-0:31
Half
13.11 mi12:16:191:46:138:065:34
8:10
-0:24
25K
15.53 mi12:37:082:07:028:1120:49
8:35
+0:25
30K
18.64 mi13:04:202:34:148:1627:12
8:45
+0:10
20M
20.00 mi13:16:132:46:078:1811:53
8:45
0:00
21M
21.00 mi13:25:122:55:068:208:59
8:59
+0:14
35K
21.75 mi13:31:223:01:168:206:10
8:15
-0:44
23M
23.00 mi13:42:103:12:048:2110:48
8:38
+0:23
24M
24.00 mi13:50:263:20:208:218:16
8:16
-0:22
40K
24.85 mi13:57:303:27:248:217:04
8:16
0:00
25.2M
25.20 mi14:00:353:30:298:213:05
8:56
+0:40
Finish
26.22 mi14:08:363:38:308:208:01
7:52
-1:04

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

7:05 /mi

Average Pace

8:20 /mi

Slowest Pace

9:05 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:20:54

37% of race

Time at Steady Pace

1:37:20

45% of race

Time at Slower Pace

40:16

18% of race

Average Pace: 8:20 /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 mi10:52:0521:597:0521:59
7:05
#8432
10K
6.21 mi11:15:5545:497:2223:50
7:40
#10988
15K
9.32 mi11:44:071:14:017:5628:12
9:05
#15848
20K
12.43 mi12:10:451:40:398:0626:38
8:34
#16670
Half
13.11 mi12:16:191:46:138:065:34
8:10
#16686
25K
15.53 mi12:37:082:07:028:1120:49
8:35
#16816
30K
18.64 mi13:04:202:34:148:1627:12
8:45
#16679
20M
20.00 mi13:16:132:46:078:1811:53
8:45
#16550
21M
21.00 mi13:25:122:55:068:208:59
8:59
#16311
35K
21.75 mi13:31:223:01:168:206:10
8:15
#16203
23M
23.00 mi13:42:103:12:048:2110:48
8:38
#16014
24M
24.00 mi13:50:263:20:208:218:16
8:16
#15886
40K
24.85 mi13:57:303:27:248:217:04
8:16
#15702
25.2M
25.20 mi14:00:353:30:298:213:05
8:56
#15632
Finish
26.22 mi14:08:363:38:308:208:01
7:52
#15489
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi84327273727322348(Top 79%)13533(Top 84%)13533(Top 678%)
10K6.21 mi3.10 mi10988-25568663-13908663-139013627(Top 48%)9852(Top 61%)9852(Top 494%)
15K9.32 mi3.11 mi15848-486010756-209310756-209322348(Top 79%)13533(Top 84%)13533(Top 678%)
20K12.43 mi3.11 mi16670-82211080-32411080-32418667(Top 66%)11882(Top 74%)11882(Top 595%)
Half13.11 mi0.68 mi16686-1611086-611086-616961(Top 60%)11152(Top 69%)11152(Top 559%)
25K15.53 mi2.42 mi16816-13011113-2711113-2717701(Top 62%)11398(Top 71%)11398(Top 571%)
30K18.64 mi3.11 mi16679+13711006+10711006+10716316(Top 57%)10629(Top 66%)10629(Top 533%)
20M20.00 mi1.36 mi16550+12910915+9110915+9115327(Top 54%)10063(Top 62%)10063(Top 504%)
21M21.00 mi1.00 mi16311+23910787+12810787+12813392(Top 47%)9051(Top 56%)9051(Top 453%)
35K21.75 mi0.75 mi16203+10810724+6310724+6313884(Top 49%)9235(Top 57%)9235(Top 463%)
23M23.00 mi1.25 mi16014+18910600+12410600+12414079(Top 50%)9210(Top 57%)9210(Top 461%)
24M24.00 mi1.00 mi15886+12810528+7210528+7213019(Top 46%)8666(Top 54%)8666(Top 434%)
40K24.85 mi0.85 mi15702+18410429+9910429+9911958(Top 42%)8039(Top 50%)8039(Top 403%)
25.2M25.20 mi0.35 mi15632+7010380+4910380+4911462(Top 40%)7722(Top 48%)7722(Top 387%)
Finish26.22 mi1.02 mi15489+14310300+8010300+8011930(Top 42%)8011(Top 50%)8011(Top 401%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 79%
×21story building
+97ft-345ft

Overall

22348

Males

13533

M50-54

13533

5K→10K

3.1 - 6.2 mi

Top 48%
×5story building
+79ft-138ft

Overall

13627

Males

9852

M50-54

9852

10K→15K

6.2 - 9.3 mi

Top 79%
×3story building
+67ft-78ft

Overall

22348

Males

13533

M50-54

13533

15K→20K

9.3 - 12.4 mi

Top 66%
×5story building
+106ft-86ft

Overall

18667

Males

11882

M50-54

11882

20K→Half

12.4 - 13.1 mi

Top 60%
×2story building
+19ft-37ft

Overall

16961

Males

11152

M50-54

11152

Half→25K

13.1 - 15.5 mi

Top 62%
×4story building
+66ft-88ft

Overall

17701

Males

11398

M50-54

11398

25K→30K

15.5 - 18.6 mi

Top 57%
×9story building
+181ft-148ft

Overall

16316

Males

10629

M50-54

10629

30K→20M

18.6 - 20.0 mi

Top 54%
×5story building
+64ft-50ft

Overall

15327

Males

10063

M50-54

10063

20M→21M

20.0 - 21.0 mi

Top 47%
×8story building
+106ft-24ft

Overall

13392

Males

9051

M50-54

9051

21M→35K

21.0 - 21.8 mi

Top 49%
×7story building
+17ft-86ft

Overall

13884

Males

9235

M50-54

9235

35K→23M

21.8 - 23.0 mi

Top 50%
×5story building
+23ft-63ft

Overall

14079

Males

9210

M50-54

9210

23M→24M

23.0 - 24.0 mi

Top 46%
×6story building
+12ft-82ft

Overall

13019

Males

8666

M50-54

8666

24M→40K

24.0 - 24.9 mi

Top 42%
×1story
+6ft-20ft

Overall

11958

Males

8039

M50-54

8039

40K→25.2M

24.9 - 25.2 mi

Top 40%
×1story
+13ft-16ft

Overall

11462

Males

7722

M50-54

7722

25.2M→Finish

25.2 - 26.2 mi

Top 42%
×2story building
+22ft-21ft

Overall

11930

Males

8011

M50-54

8011

Passing Analysis

Category:
Athletes Passed
1791
Passed By
8846
Net Change
-7057
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8432
5K → 10K32557-2556#8432#10988
10K → 15K24862-4860#10988#15848
15K → 20K54876-822#15848#16670
20K → Half3248-16#16670#16686
Half → 25K117247-130#16686#16816
25K → 30K278141+137#16816#16679
30K → 20M17546+129#16679#16550
20M → 21M2467+239#16550#16311
21M → 35K12012+108#16311#16203
35K → 23M20718+189#16203#16014
23M → 24M14416+128#16014#15886
24M → 40K1884+184#15886#15702
40K → 25.2M733+70#15702#15632
25.2M → Finish1529+143#15632#15489
TOTALS17918846-7057
📊

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