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BOSTON MARATHON 2025

Ian O'Leary

Bib: 4157•M

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 3%
Gender (Male)
#0 / 16105
Top 5%
Division (M18-39)
#0 / 5642
Top 12%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:35
Rank: #1021
Start → 5K
18:35 | 5:59/mi
10K· 6.21 mi
36:47
Rank: #863 (+158)
5K → 10K
18:12 | 5:51/mi
15K· 9.32 mi
55:10
Rank: #835 (+28)
10K → 15K
18:23 | 5:55/mi
20K· 12.43 mi
1:13:43
Rank: #814 (+21)
15K → 20K
18:33 | 5:58/mi
Half· 13.11 mi
1:17:46
Rank: #816 (-2)
20K → Half
4:03 | 5:56/mi
25K· 15.53 mi
1:32:28
Rank: #831 (-15)
Half → 25K
14:42 | 6:04/mi
30K· 18.64 mi
1:51:47
Rank: #816 (+15)
25K → 30K
19:19 | 6:13/mi
20M
2:00:30
Rank: #825 (-9)
30K → 20M
8:43 | 6:25/mi
21M
2:07:14
Rank: #831 (-6)
20M → 21M
6:44 | 6:44/mi
35K· 21.75 mi
2:11:53
Rank: #829 (+2)
21M → 35K
4:39 | 6:13/mi
23M
2:20:02
Rank: #841 (-12)
35K → 23M
8:09 | 6:31/mi
24M
2:26:25
Rank: #850 (-9)
23M → 24M
6:23 | 6:23/mi
40K· 24.85 mi
2:32:05
Rank: #884 (-34)
24M → 40K
5:40 | 6:38/mi
25.2M
2:34:31
Rank: #886 (-2)
40K → 25.2M
2:26 | 7:03/mi
Finish· 26.22 mi
2:40:44
Rank: #877 (+9)
25.2M → Finish
6:13 | 6:06/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:17:46
Pace5:56 /mi
2nd Half
Distance13.11 mi
Time1:22:58
Pace6:20 /mi
📊Positive Split: 6.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:3218:355:5918:35
5:59
-
10K
6.21 mi10:39:4436:475:5518:12
5:51
-0:08
15K
9.32 mi10:58:0755:105:5518:23
5:55
+0:04
20K
12.43 mi11:16:401:13:435:5618:33
5:58
+0:03
Half
13.11 mi11:20:431:17:465:564:03
5:56
-0:02
25K
15.53 mi11:35:251:32:285:5714:42
6:04
+0:08
30K
18.64 mi11:54:441:51:476:0019:19
6:13
+0:09
20M
20.00 mi12:03:272:00:306:018:43
6:25
+0:12
21M
21.00 mi12:10:112:07:146:046:44
6:44
+0:19
35K
21.75 mi12:14:502:11:536:044:39
6:13
-0:31
23M
23.00 mi12:22:592:20:026:058:09
6:31
+0:18
24M
24.00 mi12:29:222:26:256:066:23
6:23
-0:08
40K
24.85 mi12:35:022:32:056:075:40
6:38
+0:15
25.2M
25.20 mi12:37:282:34:316:082:26
7:03
+0:25
Finish
26.22 mi12:43:412:40:446:086:13
6:06
-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

5:51 /mi

Average Pace

6:08 /mi

Slowest Pace

7:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:17:46

48% of race

Time at Steady Pace

51:16

32% of race

Time at Slower Pace

31:42

20% of race

Average Pace: 6:08 /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 mi10:21:3218:355:5918:35
5:59
#1021
10K
6.21 mi10:39:4436:475:5518:12
5:51
#863
15K
9.32 mi10:58:0755:105:5518:23
5:55
#835
20K
12.43 mi11:16:401:13:435:5618:33
5:58
#814
Half
13.11 mi11:20:431:17:465:564:03
5:56
#816
25K
15.53 mi11:35:251:32:285:5714:42
6:04
#831
30K
18.64 mi11:54:441:51:476:0019:19
6:13
#816
20M
20.00 mi12:03:272:00:306:018:43
6:25
#825
21M
21.00 mi12:10:112:07:146:046:44
6:44
#831
35K
21.75 mi12:14:502:11:536:044:39
6:13
#829
23M
23.00 mi12:22:592:20:026:058:09
6:31
#841
24M
24.00 mi12:29:222:26:256:066:23
6:23
#850
40K
24.85 mi12:35:022:32:056:075:40
6:38
#884
25.2M
25.20 mi12:37:282:34:316:082:26
7:03
#886
Finish
26.22 mi12:43:412:40:446:086:13
6:06
#877
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1021962962794(Top 3%)744(Top 5%)744(Top 13%)
10K6.21 mi3.10 mi863+158809+153809+153735(Top 3%)690(Top 4%)690(Top 12%)
15K9.32 mi3.11 mi835+28783+26783+26794(Top 3%)744(Top 5%)744(Top 13%)
20K12.43 mi3.11 mi814+21763+20763+20807(Top 3%)758(Top 5%)758(Top 13%)
Half13.11 mi0.68 mi816-2765-2765-2932(Top 3%)882(Top 5%)882(Top 16%)
25K15.53 mi2.42 mi831-15779-14779-14967(Top 3%)911(Top 6%)911(Top 16%)
30K18.64 mi3.11 mi816+15766+13766+13961(Top 3%)903(Top 6%)903(Top 16%)
20M20.00 mi1.36 mi825-9774-8774-81278(Top 4%)1206(Top 7%)1206(Top 21%)
21M21.00 mi1.00 mi831-6780-6780-61283(Top 5%)1212(Top 8%)1212(Top 21%)
35K21.75 mi0.75 mi829+2778+2778+21248(Top 4%)1178(Top 7%)1178(Top 21%)
23M23.00 mi1.25 mi841-12789-11789-111468(Top 5%)1378(Top 9%)1378(Top 24%)
24M24.00 mi1.00 mi850-9797-8797-81577(Top 6%)1470(Top 9%)1470(Top 26%)
40K24.85 mi0.85 mi884-34829-32829-322035(Top 7%)1873(Top 12%)1873(Top 33%)
25.2M25.20 mi0.35 mi886-28298291586(Top 6%)1443(Top 9%)1443(Top 26%)
Finish26.22 mi1.02 mi877+9820+9820+91176(Top 4%)1099(Top 7%)1099(Top 19%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 3%
×21stories
+97ft-345ft

Overall

794

Males

744

M18-39

744

5K→10K

3.1 - 6.2 mi

Top 3%
×5stories
+79ft-138ft

Overall

735

Males

690

M18-39

690

10K→15K

6.2 - 9.3 mi

Top 3%
×3stories
+67ft-78ft

Overall

794

Males

744

M18-39

744

15K→20K

9.3 - 12.4 mi

Top 3%
×5stories
+106ft-86ft

Overall

807

Males

758

M18-39

758

20K→Half

12.4 - 13.1 mi

Top 3%
×2stories
+19ft-37ft

Overall

932

Males

882

M18-39

882

Half→25K

13.1 - 15.5 mi

Top 3%
×4stories
+66ft-88ft

Overall

967

Males

911

M18-39

911

25K→30K

15.5 - 18.6 mi

Top 3%
×9stories
+181ft-148ft

Overall

961

Males

903

M18-39

903

30K→20M

18.6 - 20.0 mi

Top 4%
×5stories
+64ft-50ft

Overall

1278

Males

1206

M18-39

1206

20M→21M

20.0 - 21.0 mi

Top 5%
×8stories
+106ft-24ft

Overall

1283

Males

1212

M18-39

1212

21M→35K

21.0 - 21.8 mi

Top 4%
×7stories
+17ft-86ft

Overall

1248

Males

1178

M18-39

1178

35K→23M

21.8 - 23.0 mi

Top 5%
×5stories
+23ft-63ft

Overall

1468

Males

1378

M18-39

1378

23M→24M

23.0 - 24.0 mi

Top 6%
×6stories
+12ft-82ft

Overall

1577

Males

1470

M18-39

1470

24M→40K

24.0 - 24.9 mi

Top 7%
×1story
+6ft-20ft

Overall

2035

Males

1873

M18-39

1873

40K→25.2M

24.9 - 25.2 mi

Top 6%
×1story
+13ft-16ft

Overall

1586

Males

1443

M18-39

1443

25.2M→Finish

25.2 - 26.2 mi

Top 4%
×2stories
+22ft-21ft

Overall

1176

Males

1099

M18-39

1099

Passing Analysis

Category:
Athletes Passed
417
Passed By
273
Net Change
+144
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1021
5K → 10K1624+158#1021#863
10K → 15K4416+28#863#835
15K → 20K3716+21#835#814
20K → Half68-2#814#816
Half → 25K2035-15#816#831
25K → 30K4429+15#831#816
30K → 20M1524-9#816#825
20M → 21M1218-6#825#831
21M → 35K1513+2#831#829
35K → 23M1426-12#829#841
23M → 24M1120-9#841#850
24M → 40K943-34#850#884
40K → 25.2M79-2#884#886
25.2M → Finish2112+9#886#877
TOTALS417273+144
📊

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