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BOSTON MARATHON 2025

Ondrej Blaha

Bib: 2526•M

CT

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 8%
Gender (Male)
#0 / 16105
Top 13%
Masters (Masters Men)
#0 / 10463
Top 4%
Division (M40-44)
#0 / 2247
Top 11%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:37
Rank: #4882
Start → 5K
20:37 | 6:38/mi
10K· 6.21 mi
41:06
Rank: #4603 (+279)
5K → 10K
20:29 | 6:36/mi
15K· 9.32 mi
1:01:32
Rank: #4407 (+196)
10K → 15K
20:26 | 6:35/mi
20K· 12.43 mi
1:21:44
Rank: #3991 (+416)
15K → 20K
20:12 | 6:30/mi
Half· 13.11 mi
1:26:08
Rank: #3946 (+45)
20K → Half
4:24 | 6:27/mi
25K· 15.53 mi
1:41:52
Rank: #3736 (+210)
Half → 25K
15:44 | 6:29/mi
30K· 18.64 mi
2:01:55
Rank: #3264 (+472)
25K → 30K
20:03 | 6:27/mi
20M
2:10:39
Rank: #3056 (+208)
30K → 20M
8:44 | 6:26/mi
21M
2:17:23
Rank: #2909 (+147)
20M → 21M
6:44 | 6:44/mi
35K· 21.75 mi
2:21:51
Rank: #2767 (+142)
21M → 35K
4:28 | 5:58/mi
23M
2:29:47
Rank: #2580 (+187)
35K → 23M
7:56 | 6:20/mi
24M
2:35:56
Rank: #2451 (+129)
23M → 24M
6:09 | 6:09/mi
40K· 24.85 mi
2:41:15
Rank: #2340 (+111)
24M → 40K
5:19 | 6:13/mi
25.2M
2:43:35
Rank: #2299 (+41)
40K → 25.2M
2:20 | 6:46/mi
Finish· 26.22 mi
2:49:40
Rank: #2207 (+92)
25.2M → Finish
6:05 | 5:58/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:26:08
Pace6:34 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:23:32
Pace6:22 /mi
📊Negative Split: 3.0% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:5220:376:3820:37
6:38
-
10K
6.21 mi10:43:2141:066:3720:29
6:36
-0:02
15K
9.32 mi11:03:471:01:326:3620:26
6:35
-0:01
20K
12.43 mi11:23:591:21:446:3520:12
6:30
-0:05
Half
13.11 mi11:28:231:26:086:344:24
6:27
-0:03
25K
15.53 mi11:44:071:41:526:3315:44
6:29
+0:02
30K
18.64 mi12:04:102:01:556:3220:03
6:27
-0:02
20M
20.00 mi12:12:542:10:396:328:44
6:26
-0:01
21M
21.00 mi12:19:382:17:236:336:44
6:44
+0:18
35K
21.75 mi12:24:062:21:516:314:28
5:58
-0:46
23M
23.00 mi12:32:022:29:476:317:56
6:20
+0:22
24M
24.00 mi12:38:112:35:566:306:09
6:09
-0:11
40K
24.85 mi12:43:302:41:156:295:19
6:13
+0:04
25.2M
25.20 mi12:45:502:43:356:292:20
6:46
+0:33
Finish
26.22 mi12:51:552:49:406:296:05
5:58
-0:48

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

5:58 /mi

Average Pace

6:29 /mi

Slowest Pace

6:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:39:04

58% of race

Time at Steady Pace

1:10:36

42% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:28 /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 mi10:22:5220:376:3820:37
6:38
#4882
10K
6.21 mi10:43:2141:066:3720:29
6:36
#4603
15K
9.32 mi11:03:471:01:326:3620:26
6:35
#4407
20K
12.43 mi11:23:591:21:446:3520:12
6:30
#3991
Half
13.11 mi11:28:231:26:086:344:24
6:27
#3946
25K
15.53 mi11:44:071:41:526:3315:44
6:29
#3736
30K
18.64 mi12:04:102:01:556:3220:03
6:27
#3264
20M
20.00 mi12:12:542:10:396:328:44
6:26
#3056
21M
21.00 mi12:19:382:17:236:336:44
6:44
#2909
35K
21.75 mi12:24:062:21:516:314:28
5:58
#2767
23M
23.00 mi12:32:022:29:476:317:56
6:20
#2580
24M
24.00 mi12:38:112:35:566:306:09
6:09
#2451
40K
24.85 mi12:43:302:41:156:295:19
6:13
#2340
25.2M
25.20 mi12:45:502:43:356:292:20
6:46
#2299
Finish
26.22 mi12:51:552:49:406:296:05
5:58
#2207
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi4882456745674054(Top 14%)3816(Top 24%)3816(Top 170%)
10K6.21 mi3.10 mi4603+2794318+2494318+2494399(Top 15%)4124(Top 26%)4124(Top 184%)
15K9.32 mi3.11 mi4407+1964143+1754143+1754054(Top 14%)3816(Top 24%)3816(Top 170%)
20K12.43 mi3.11 mi3991+4163758+3853758+3853127(Top 11%)2967(Top 18%)2967(Top 132%)
Half13.11 mi0.68 mi3946+453716+423716+423307(Top 12%)3133(Top 19%)3133(Top 139%)
25K15.53 mi2.42 mi3736+2103526+1903526+1902815(Top 10%)2677(Top 17%)2677(Top 119%)
30K18.64 mi3.11 mi3264+4723093+4333093+4331785(Top 6%)1696(Top 11%)1696(Top 75%)
20M20.00 mi1.36 mi3056+2082900+1932900+1931336(Top 5%)1263(Top 8%)1263(Top 56%)
21M21.00 mi1.00 mi2909+1472764+1362764+1361316(Top 5%)1245(Top 8%)1245(Top 55%)
35K21.75 mi0.75 mi2767+1422632+1322632+132688(Top 2%)645(Top 4%)645(Top 29%)
23M23.00 mi1.25 mi2580+1872455+1772455+177976(Top 3%)920(Top 6%)920(Top 41%)
24M24.00 mi1.00 mi2451+1292332+1232332+123901(Top 3%)847(Top 5%)847(Top 38%)
40K24.85 mi0.85 mi2340+1112225+1072225+107776(Top 3%)727(Top 5%)727(Top 32%)
25.2M25.20 mi0.35 mi2299+412185+402185+40912(Top 3%)845(Top 5%)845(Top 38%)
Finish26.22 mi1.02 mi2207+922092+932092+93841(Top 3%)794(Top 5%)794(Top 35%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 14%
×21stories
+97ft-345ft

Overall

4054

Males

3816

M40-44

3816

5K→10K

3.1 - 6.2 mi

Top 15%
×5stories
+79ft-138ft

Overall

4399

Males

4124

M40-44

4124

10K→15K

6.2 - 9.3 mi

Top 14%
×3stories
+67ft-78ft

Overall

4054

Males

3816

M40-44

3816

15K→20K

9.3 - 12.4 mi

Top 11%
×5stories
+106ft-86ft

Overall

3127

Males

2967

M40-44

2967

20K→Half

12.4 - 13.1 mi

Top 12%
×2stories
+19ft-37ft

Overall

3307

Males

3133

M40-44

3133

Half→25K

13.1 - 15.5 mi

Top 10%
×4stories
+66ft-88ft

Overall

2815

Males

2677

M40-44

2677

25K→30K

15.5 - 18.6 mi

Top 6%
×9stories
+181ft-148ft

Overall

1785

Males

1696

M40-44

1696

30K→20M

18.6 - 20.0 mi

Top 5%
×5stories
+64ft-50ft

Overall

1336

Males

1263

M40-44

1263

20M→21M

20.0 - 21.0 mi

Top 5%
×8stories
+106ft-24ft

Overall

1316

Males

1245

M40-44

1245

21M→35K

21.0 - 21.8 mi

Top 2%
×7stories
+17ft-86ft

Overall

688

Males

645

M40-44

645

35K→23M

21.8 - 23.0 mi

Top 3%
×5stories
+23ft-63ft

Overall

976

Males

920

M40-44

920

23M→24M

23.0 - 24.0 mi

Top 3%
×6stories
+12ft-82ft

Overall

901

Males

847

M40-44

847

24M→40K

24.0 - 24.9 mi

Top 3%
×1story
+6ft-20ft

Overall

776

Males

727

M40-44

727

40K→25.2M

24.9 - 25.2 mi

Top 3%
×1story
+13ft-16ft

Overall

912

Males

845

M40-44

845

25.2M→Finish

25.2 - 26.2 mi

Top 3%
×2stories
+22ft-21ft

Overall

841

Males

794

M40-44

794

Passing Analysis

Category:
Athletes Passed
2784
Passed By
109
Net Change
+2675
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4882
5K → 10K34061+279#4882#4603
10K → 15K22428+196#4603#4407
15K → 20K4182+416#4407#3991
20K → Half461+45#3991#3946
Half → 25K2177+210#3946#3736
25K → 30K4731+472#3736#3264
30K → 20M2080+208#3264#3056
20M → 21M1481+147#3056#2909
21M → 35K1431+142#2909#2767
35K → 23M1870+187#2767#2580
23M → 24M1290+129#2580#2451
24M → 40K1110+111#2451#2340
40K → 25.2M432+41#2340#2299
25.2M → Finish975+92#2299#2207
TOTALS2784109+2675
📊

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