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BOSTON MARATHON 2025

Karel Splítek

Bib: 310•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 1%
Gender (Male)
#0 / 16105
Top 2%
Division (M18-39)
#0 / 5642
Top 5%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
17:44
Rank: #440
Start → 5K
17:44 | 5:42/mi
10K· 6.21 mi
35:40
Rank: #507 (-67)
5K → 10K
17:56 | 5:46/mi
15K· 9.32 mi
53:35
Rank: #503 (+4)
10K → 15K
17:55 | 5:46/mi
20K· 12.43 mi
1:11:53
Rank: #503
15K → 20K
18:18 | 5:53/mi
Half· 13.11 mi
1:15:45
Rank: #493 (+10)
20K → Half
3:52 | 5:40/mi
25K· 15.53 mi
1:29:51
Rank: #474 (+19)
Half → 25K
14:06 | 5:49/mi
30K· 18.64 mi
1:48:25
Rank: #462 (+12)
25K → 30K
18:34 | 5:59/mi
20M
1:56:40
Rank: #454 (+8)
30K → 20M
8:15 | 6:04/mi
21M
2:02:57
Rank: #438 (+16)
20M → 21M
6:17 | 6:17/mi
35K· 21.75 mi
2:07:16
Rank: #429 (+9)
21M → 35K
4:19 | 5:46/mi
23M
2:14:40
Rank: #404 (+25)
35K → 23M
7:24 | 5:55/mi
24M
2:20:34
Rank: #390 (+14)
23M → 24M
5:54 | 5:54/mi
40K· 24.85 mi
2:25:37
Rank: #377 (+13)
24M → 40K
5:03 | 5:54/mi
25.2M
2:27:50
Rank: #368 (+9)
40K → 25.2M
2:13 | 6:26/mi
Finish· 26.22 mi
2:33:25
Rank: #341 (+27)
25.2M → Finish
5:35 | 5:29/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:15:45
Pace5:47 /mi
2nd Half
Distance13.11 mi
Time1:17:40
Pace5:55 /mi
📊Positive Split: 2.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:17:5417:445:4217:44
5:42
-
10K
6.21 mi10:35:5035:405:4417:56
5:46
+0:04
15K
9.32 mi10:53:4553:355:4517:55
5:46
0:00
20K
12.43 mi11:12:031:11:535:4718:18
5:53
+0:07
Half
13.11 mi11:15:551:15:455:473:52
5:40
-0:13
25K
15.53 mi11:30:011:29:515:4714:06
5:49
+0:09
30K
18.64 mi11:48:351:48:255:4918:34
5:59
+0:10
20M
20.00 mi11:56:501:56:405:508:15
6:04
+0:05
21M
21.00 mi12:03:072:02:575:516:17
6:17
+0:13
35K
21.75 mi12:07:262:07:165:514:19
5:46
-0:31
23M
23.00 mi12:14:502:14:405:517:24
5:55
+0:09
24M
24.00 mi12:20:442:20:345:515:54
5:54
-0:01
40K
24.85 mi12:25:472:25:375:525:03
5:54
0:00
25.2M
25.20 mi12:28:002:27:505:522:13
6:26
+0:32
Finish
26.22 mi12:33:352:33:255:515:35
5:29
-0:57

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

5:29 /mi

Average Pace

5:51 /mi

Slowest Pace

6:26 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:16:40

89% of race

Time at Steady Pace

16:45

11% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 5:51 /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 mi10:17:5417:445:4217:44
5:42
#440
10K
6.21 mi10:35:5035:405:4417:56
5:46
#507
15K
9.32 mi10:53:4553:355:4517:55
5:46
#503
20K
12.43 mi11:12:031:11:535:4718:18
5:53
#503
Half
13.11 mi11:15:551:15:455:473:52
5:40
#493
25K
15.53 mi11:30:011:29:515:4714:06
5:49
#474
30K
18.64 mi11:48:351:48:255:4918:34
5:59
#462
20M
20.00 mi11:56:501:56:405:508:15
6:04
#454
21M
21.00 mi12:03:072:02:575:516:17
6:17
#438
35K
21.75 mi12:07:262:07:165:514:19
5:46
#429
23M
23.00 mi12:14:502:14:405:517:24
5:55
#404
24M
24.00 mi12:20:442:20:345:515:54
5:54
#390
40K
24.85 mi12:25:472:25:375:525:03
5:54
#377
25.2M
25.20 mi12:28:002:27:505:522:13
6:26
#368
Finish
26.22 mi12:33:352:33:255:515:35
5:29
#341
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi440402402474(Top 2%)439(Top 3%)439(Top 8%)
10K6.21 mi3.10 mi507-67469-67469-67552(Top 2%)514(Top 3%)514(Top 9%)
15K9.32 mi3.11 mi503+4466+3466+3474(Top 2%)439(Top 3%)439(Top 8%)
20K12.43 mi3.11 mi503467-1467-1594(Top 2%)547(Top 3%)547(Top 10%)
Half13.11 mi0.68 mi493+10457+10457+10386(Top 1%)359(Top 2%)359(Top 6%)
25K15.53 mi2.42 mi474+19438+19438+19435(Top 2%)403(Top 3%)403(Top 7%)
30K18.64 mi3.11 mi462+12427+11427+11456(Top 2%)422(Top 3%)422(Top 7%)
20M20.00 mi1.36 mi454+8419+8419+8482(Top 2%)451(Top 3%)451(Top 8%)
21M21.00 mi1.00 mi438+16404+15404+15348(Top 1%)325(Top 2%)325(Top 6%)
35K21.75 mi0.75 mi429+9394+10394+10337(Top 1%)315(Top 2%)315(Top 6%)
23M23.00 mi1.25 mi404+25374+20374+20250(Top 0.9%)233(Top 1%)233(Top 4%)
24M24.00 mi1.00 mi390+14360+14360+14397(Top 1%)368(Top 2%)368(Top 7%)
40K24.85 mi0.85 mi377+13348+12348+12286(Top 1%)263(Top 2%)263(Top 5%)
25.2M25.20 mi0.35 mi368+9339+9339+9346(Top 1%)320(Top 2%)320(Top 6%)
Finish26.22 mi1.02 mi341+27314+25314+25139(Top 0.5%)133(Top 0.8%)133(Top 2%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 2%
×21stories
+97ft-345ft

Overall

474

Males

439

M18-39

439

5K→10K

3.1 - 6.2 mi

Top 2%
×5stories
+79ft-138ft

Overall

552

Males

514

M18-39

514

10K→15K

6.2 - 9.3 mi

Top 2%
×3stories
+67ft-78ft

Overall

474

Males

439

M18-39

439

15K→20K

9.3 - 12.4 mi

Top 2%
×5stories
+106ft-86ft

Overall

594

Males

547

M18-39

547

20K→Half

12.4 - 13.1 mi

Top 1%
×2stories
+19ft-37ft

Overall

386

Males

359

M18-39

359

Half→25K

13.1 - 15.5 mi

Top 2%
×4stories
+66ft-88ft

Overall

435

Males

403

M18-39

403

25K→30K

15.5 - 18.6 mi

Top 2%
×9stories
+181ft-148ft

Overall

456

Males

422

M18-39

422

30K→20M

18.6 - 20.0 mi

Top 2%
×5stories
+64ft-50ft

Overall

482

Males

451

M18-39

451

20M→21M

20.0 - 21.0 mi

Top 1%
×8stories
+106ft-24ft

Overall

348

Males

325

M18-39

325

21M→35K

21.0 - 21.8 mi

Top 1%
×7stories
+17ft-86ft

Overall

337

Males

315

M18-39

315

35K→23M

21.8 - 23.0 mi

Top 0.9%
×5stories
+23ft-63ft

Overall

250

Males

233

M18-39

233

23M→24M

23.0 - 24.0 mi

Top 1%
×6stories
+12ft-82ft

Overall

397

Males

368

M18-39

368

24M→40K

24.0 - 24.9 mi

Top 1%
×1story
+6ft-20ft

Overall

286

Males

263

M18-39

263

40K→25.2M

24.9 - 25.2 mi

Top 1%
×1story
+13ft-16ft

Overall

346

Males

320

M18-39

320

25.2M→Finish

25.2 - 26.2 mi

Top 0.5%
×2stories
+22ft-21ft

Overall

139

Males

133

M18-39

133

Passing Analysis

Category:
Athletes Passed
246
Passed By
147
Net Change
+99
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#440
5K → 10K572-67#440#507
10K → 15K2622+4#507#503
15K → 20K17170#503#503
20K → Half100+10#503#493
Half → 25K267+19#493#474
25K → 30K2614+12#474#462
30K → 20M168+8#462#454
20M → 21M171+16#454#438
21M → 35K101+9#438#429
35K → 23M261+25#429#404
23M → 24M151+14#404#390
24M → 40K141+13#390#377
40K → 25.2M101+9#377#368
25.2M → Finish281+27#368#341
TOTALS246147+99
📊

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