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BOSTON MARATHON 2025

Ludek Kosina

Bib: 6757•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 19%
Gender (Male)
#0 / 16105
Top 30%
Masters (Masters Men)
#0 / 10463
Top 16%
Division (M45-49)
#0 / 2386
Top 21%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:05
Rank: #3544
Start → 5K
20:05 | 6:28/mi
10K· 6.21 mi
40:30
Rank: #3897 (-353)
5K → 10K
20:25 | 6:34/mi
15K· 9.32 mi
1:00:55
Rank: #3925 (-28)
10K → 15K
20:25 | 6:34/mi
20K· 12.43 mi
1:21:43
Rank: #3978 (-53)
15K → 20K
20:48 | 6:42/mi
Half· 13.11 mi
1:26:14
Rank: #3999 (-21)
20K → Half
4:31 | 6:37/mi
25K· 15.53 mi
1:42:52
Rank: #4156 (-157)
Half → 25K
16:38 | 6:52/mi
30K· 18.64 mi
2:05:11
Rank: #4435 (-279)
25K → 30K
22:19 | 7:11/mi
20M
2:15:12
Rank: #4594 (-159)
30K → 20M
10:01 | 7:22/mi
21M
2:23:12
Rank: #4762 (-168)
20M → 21M
8:00 | 8:00/mi
35K· 21.75 mi
2:28:49
Rank: #4908 (-146)
21M → 35K
5:37 | 7:30/mi
23M
2:38:12
Rank: #5038 (-130)
35K → 23M
9:23 | 7:30/mi
24M
2:45:39
Rank: #5122 (-84)
23M → 24M
7:27 | 7:27/mi
40K· 24.85 mi
2:52:19
Rank: #5202 (-80)
24M → 40K
6:40 | 7:48/mi
25.2M
2:55:19
Rank: #5236 (-34)
40K → 25.2M
3:00 | 8:42/mi
Finish· 26.22 mi
3:03:03
Rank: #5329 (-93)
25.2M → Finish
7:44 | 7:35/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:26:14
Pace6:35 /mi
2nd Half
Distance13.11 mi
Time1:36:49
Pace7:23 /mi
📊Positive Split: 12.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:27:4820:056:2820:05
6:28
-
10K
6.21 mi10:48:1340:306:3120:25
6:34
+0:06
15K
9.32 mi11:08:381:00:556:3220:25
6:34
0:00
20K
12.43 mi11:29:261:21:436:3520:48
6:42
+0:08
Half
13.11 mi11:33:571:26:146:354:31
6:37
-0:05
25K
15.53 mi11:50:351:42:526:3716:38
6:52
+0:15
30K
18.64 mi12:12:542:05:116:4322:19
7:11
+0:19
20M
20.00 mi12:22:552:15:126:4610:01
7:22
+0:11
21M
21.00 mi12:30:552:23:126:498:00
8:00
+0:38
35K
21.75 mi12:36:322:28:496:515:37
7:30
-0:30
23M
23.00 mi12:45:552:38:126:539:23
7:30
0:00
24M
24.00 mi12:53:222:45:396:547:27
7:27
-0:03
40K
24.85 mi13:00:022:52:196:566:40
7:48
+0:21
25.2M
25.20 mi13:03:022:55:196:573:00
8:42
+0:54
Finish
26.22 mi13:10:463:03:036:597:44
7:35
-1:07

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

6:28 /mi

Average Pace

6:59 /mi

Slowest Pace

8:42 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:42:52

56% of race

Time at Steady Pace

1:02:31

34% of race

Time at Slower Pace

17:40

10% of race

Average Pace: 6:59 /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 mi10:27:4820:056:2820:05
6:28
#3544
10K
6.21 mi10:48:1340:306:3120:25
6:34
#3897
15K
9.32 mi11:08:381:00:556:3220:25
6:34
#3925
20K
12.43 mi11:29:261:21:436:3520:48
6:42
#3978
Half
13.11 mi11:33:571:26:146:354:31
6:37
#3999
25K
15.53 mi11:50:351:42:526:3716:38
6:52
#4156
30K
18.64 mi12:12:542:05:116:4322:19
7:11
#4435
20M
20.00 mi12:22:552:15:126:4610:01
7:22
#4594
21M
21.00 mi12:30:552:23:126:498:00
8:00
#4762
35K
21.75 mi12:36:322:28:496:515:37
7:30
#4908
23M
23.00 mi12:45:552:38:126:539:23
7:30
#5038
24M
24.00 mi12:53:222:45:396:547:27
7:27
#5122
40K
24.85 mi13:00:022:52:196:566:40
7:48
#5202
25.2M
25.20 mi13:03:022:55:196:573:00
8:42
#5236
Finish
26.22 mi13:10:463:03:036:597:44
7:35
#5329
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi3544336533654013(Top 14%)3778(Top 23%)3778(Top 158%)
10K6.21 mi3.10 mi3897-3533685-3203685-3204218(Top 15%)3963(Top 25%)3963(Top 166%)
15K9.32 mi3.11 mi3925-283700-153700-154013(Top 14%)3778(Top 23%)3778(Top 158%)
20K12.43 mi3.11 mi3978-533745-453745-454363(Top 15%)4077(Top 25%)4077(Top 171%)
Half13.11 mi0.68 mi3999-213766-213766-214478(Top 16%)4171(Top 26%)4171(Top 175%)
25K15.53 mi2.42 mi4156-1573904-1383904-1385340(Top 19%)4868(Top 30%)4868(Top 204%)
30K18.64 mi3.11 mi4435-2794142-2384142-2385794(Top 20%)5156(Top 32%)5156(Top 216%)
20M20.00 mi1.36 mi4594-1594261-1194261-1196169(Top 22%)5300(Top 33%)5300(Top 222%)
21M21.00 mi1.00 mi4762-1684403-1424403-1427307(Top 26%)5842(Top 36%)5842(Top 245%)
35K21.75 mi0.75 mi4908-1464516-1134516-1138601(Top 30%)6615(Top 41%)6615(Top 277%)
23M23.00 mi1.25 mi5038-1304616-1004616-1006622(Top 23%)5364(Top 33%)5364(Top 225%)
24M24.00 mi1.00 mi5122-844673-574673-577306(Top 26%)5693(Top 35%)5693(Top 239%)
40K24.85 mi0.85 mi5202-804731-584731-588665(Top 31%)6323(Top 39%)6323(Top 265%)
25.2M25.20 mi0.35 mi5236-344752-214752-219870(Top 35%)6847(Top 43%)6847(Top 287%)
Finish26.22 mi1.02 mi5329-934812-604812-609795(Top 34%)6856(Top 43%)6856(Top 287%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 14%
×21stories
+97ft-345ft

Overall

4013

Males

3778

M45-49

3778

5K→10K

3.1 - 6.2 mi

Top 15%
×5stories
+79ft-138ft

Overall

4218

Males

3963

M45-49

3963

10K→15K

6.2 - 9.3 mi

Top 14%
×3stories
+67ft-78ft

Overall

4013

Males

3778

M45-49

3778

15K→20K

9.3 - 12.4 mi

Top 15%
×5stories
+106ft-86ft

Overall

4363

Males

4077

M45-49

4077

20K→Half

12.4 - 13.1 mi

Top 16%
×2stories
+19ft-37ft

Overall

4478

Males

4171

M45-49

4171

Half→25K

13.1 - 15.5 mi

Top 19%
×4stories
+66ft-88ft

Overall

5340

Males

4868

M45-49

4868

25K→30K

15.5 - 18.6 mi

Top 20%
×9stories
+181ft-148ft

Overall

5794

Males

5156

M45-49

5156

30K→20M

18.6 - 20.0 mi

Top 22%
×5stories
+64ft-50ft

Overall

6169

Males

5300

M45-49

5300

20M→21M

20.0 - 21.0 mi

Top 26%
×8stories
+106ft-24ft

Overall

7307

Males

5842

M45-49

5842

21M→35K

21.0 - 21.8 mi

Top 30%
×7stories
+17ft-86ft

Overall

8601

Males

6615

M45-49

6615

35K→23M

21.8 - 23.0 mi

Top 23%
×5stories
+23ft-63ft

Overall

6622

Males

5364

M45-49

5364

23M→24M

23.0 - 24.0 mi

Top 26%
×6stories
+12ft-82ft

Overall

7306

Males

5693

M45-49

5693

24M→40K

24.0 - 24.9 mi

Top 31%
×1story
+6ft-20ft

Overall

8665

Males

6323

M45-49

6323

40K→25.2M

24.9 - 25.2 mi

Top 35%
×1story
+13ft-16ft

Overall

9870

Males

6847

M45-49

6847

25.2M→Finish

25.2 - 26.2 mi

Top 34%
×2stories
+22ft-21ft

Overall

9795

Males

6856

M45-49

6856

Passing Analysis

Category:
Athletes Passed
550
Passed By
2335
Net Change
-1785
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3544
5K → 10K27380-353#3544#3897
10K → 15K88116-28#3897#3925
15K → 20K76129-53#3925#3978
20K → Half829-21#3978#3999
Half → 25K47204-157#3999#4156
25K → 30K68347-279#4156#4435
30K → 20M36195-159#4435#4594
20M → 21M29197-168#4594#4762
21M → 35K29175-146#4762#4908
35K → 23M49179-130#4908#5038
23M → 24M33117-84#5038#5122
24M → 40K34114-80#5122#5202
40K → 25.2M943-34#5202#5236
25.2M → Finish17110-93#5236#5329
TOTALS5502335-1785
📊

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