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BOSTON MARATHON 2025

Kevin O'brien

Bib: 29794•M

MA

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
32:34
Rank: #26707
Start → 5K
32:34 | 10:29/mi
10K· 6.21 mi
1:04:34
Rank: #26268 (+439)
5K → 10K
32:00 | 10:18/mi
15K· 9.32 mi
1:32:45
Rank: #25166 (+1102)
10K → 15K
28:11 | 9:04/mi
20K· 12.43 mi
2:01:29
Rank: #24484 (+682)
15K → 20K
28:44 | 9:15/mi
Half· 13.11 mi
2:07:49
Rank: #24403 (+81)
20K → Half
6:20 | 9:17/mi
25K· 15.53 mi
2:31:59
Rank: #24199 (+204)
Half → 25K
24:10 | 9:58/mi
30K· 18.64 mi
3:07:00
Rank: #24304 (-105)
25K → 30K
35:01 | 11:16/mi
20M
3:21:14
Rank: #24148 (+156)
30K → 20M
14:14 | 10:28/mi
21M
3:33:16
Rank: #24128 (+20)
20M → 21M
12:02 | 12:02/mi
35K· 21.75 mi
3:40:38
Rank: #24040 (+88)
21M → 35K
7:22 | 9:51/mi
23M
3:53:50
Rank: #23911 (+129)
35K → 23M
13:12 | 10:33/mi
24M
4:04:21
Rank: #23861 (+50)
23M → 24M
10:31 | 10:31/mi
40K· 24.85 mi
4:14:34
Rank: #23932 (-71)
24M → 40K
10:13 | 11:57/mi
25.2M
4:18:28
Rank: #23902 (+30)
40K → 25.2M
3:54 | 11:19/mi
Finish· 26.22 mi
4:28:22
Rank: #23853 (+49)
25.2M → Finish
9:54 | 9:43/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:07:49
Pace9:45 /mi
2nd Half
Distance13.11 mi
Time2:20:33
Pace10:43 /mi
📊Positive Split: 10.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:53:3332:3410:2932:34
10:29
-
10K
6.21 mi12:25:331:04:3410:2332:00
10:18
-0:11
15K
9.32 mi12:53:441:32:459:5728:11
9:04
-1:14
20K
12.43 mi13:22:282:01:299:4728:44
9:15
+0:11
Half
13.11 mi13:28:482:07:499:456:20
9:17
+0:02
25K
15.53 mi13:52:582:31:599:4724:10
9:58
+0:41
30K
18.64 mi14:27:593:07:0010:0235:01
11:16
+1:18
20M
20.00 mi14:42:133:21:1410:0414:14
10:28
-0:48
21M
21.00 mi14:54:153:33:1610:0912:02
12:02
+1:34
35K
21.75 mi15:01:373:40:3810:097:22
9:51
-2:11
23M
23.00 mi15:14:493:53:5010:1013:12
10:33
+0:42
24M
24.00 mi15:25:204:04:2110:1110:31
10:31
-0:02
40K
24.85 mi15:35:334:14:3410:1510:13
11:57
+1:26
25.2M
25.20 mi15:39:274:18:2810:153:54
11:19
-0:38
Finish
26.22 mi15:49:214:28:2210:159:54
9:43
-1:36

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

9:04 /mi

Average Pace

10:15 /mi

Slowest Pace

12:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:44:41

39% of race

Time at Steady Pace

1:42:31

38% of race

Time at Slower Pace

1:01:10

23% of race

Average Pace: 10:14 /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 mi11:53:3332:3410:2932:34
10:29
#26707
10K
6.21 mi12:25:331:04:3410:2332:00
10:18
#26268
15K
9.32 mi12:53:441:32:459:5728:11
9:04
#25166
20K
12.43 mi13:22:282:01:299:4728:44
9:15
#24484
Half
13.11 mi13:28:482:07:499:456:20
9:17
#24403
25K
15.53 mi13:52:582:31:599:4724:10
9:58
#24199
30K
18.64 mi14:27:593:07:0010:0235:01
11:16
#24304
20M
20.00 mi14:42:133:21:1410:0414:14
10:28
#24148
21M
21.00 mi14:54:153:33:1610:0912:02
12:02
#24128
35K
21.75 mi15:01:373:40:3810:097:22
9:51
#24040
23M
23.00 mi15:14:493:53:5010:1013:12
10:33
#23911
24M
24.00 mi15:25:204:04:2110:1110:31
10:31
#23861
40K
24.85 mi15:35:334:14:3410:1510:13
11:57
#23932
25.2M
25.20 mi15:39:274:18:2810:153:54
11:19
#23902
Finish
26.22 mi15:49:214:28:2210:159:54
9:43
#23853
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi26707154781547822332(Top 79%)13526(Top 84%)13526(Top 240%)
10K6.21 mi3.10 mi26268+43915284+19415284+19425912(Top 91%)15109(Top 94%)15109(Top 268%)
15K9.32 mi3.11 mi25166+110214783+50114783+50122332(Top 79%)13526(Top 84%)13526(Top 240%)
20K12.43 mi3.11 mi24484+68214453+33014453+33022073(Top 78%)13392(Top 83%)13392(Top 237%)
Half13.11 mi0.68 mi24403+8114422+3114422+3122892(Top 81%)13751(Top 85%)13751(Top 244%)
25K15.53 mi2.42 mi24199+20414318+10414318+10423169(Top 82%)13822(Top 86%)13822(Top 245%)
30K18.64 mi3.11 mi24304-10514346-2814346-2824497(Top 86%)14305(Top 89%)14305(Top 254%)
20M20.00 mi1.36 mi24148+15614250+9614250+9622342(Top 79%)13207(Top 82%)13207(Top 234%)
21M21.00 mi1.00 mi24128+2014231+1914231+1923647(Top 83%)13749(Top 85%)13749(Top 244%)
35K21.75 mi0.75 mi24040+8814176+5514176+5521463(Top 76%)12659(Top 79%)12659(Top 224%)
23M23.00 mi1.25 mi23911+12914093+8314093+8322126(Top 78%)12941(Top 80%)12941(Top 229%)
24M24.00 mi1.00 mi23861+5014063+3014063+3022862(Top 80%)13232(Top 82%)13232(Top 235%)
40K24.85 mi0.85 mi23932-7114088-2514088-2524850(Top 87%)14182(Top 88%)14182(Top 251%)
25.2M25.20 mi0.35 mi23902+3014066+2214066+2221540(Top 76%)12563(Top 78%)12563(Top 223%)
Finish26.22 mi1.02 mi23853+4914032+3414032+3421973(Top 77%)12778(Top 79%)12778(Top 226%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 79%
×21stories
+97ft-345ft

Overall

22332

Males

13526

M18-39

13526

5K→10K

3.1 - 6.2 mi

Top 91%
×5stories
+79ft-138ft

Overall

25912

Males

15109

M18-39

15109

10K→15K

6.2 - 9.3 mi

Top 79%
×3stories
+67ft-78ft

Overall

22332

Males

13526

M18-39

13526

15K→20K

9.3 - 12.4 mi

Top 78%
×5stories
+106ft-86ft

Overall

22073

Males

13392

M18-39

13392

20K→Half

12.4 - 13.1 mi

Top 81%
×2stories
+19ft-37ft

Overall

22892

Males

13751

M18-39

13751

Half→25K

13.1 - 15.5 mi

Top 82%
×4stories
+66ft-88ft

Overall

23169

Males

13822

M18-39

13822

25K→30K

15.5 - 18.6 mi

Top 86%
×9stories
+181ft-148ft

Overall

24497

Males

14305

M18-39

14305

30K→20M

18.6 - 20.0 mi

Top 79%
×5stories
+64ft-50ft

Overall

22342

Males

13207

M18-39

13207

20M→21M

20.0 - 21.0 mi

Top 83%
×8stories
+106ft-24ft

Overall

23647

Males

13749

M18-39

13749

21M→35K

21.0 - 21.8 mi

Top 76%
×7stories
+17ft-86ft

Overall

21463

Males

12659

M18-39

12659

35K→23M

21.8 - 23.0 mi

Top 78%
×5stories
+23ft-63ft

Overall

22126

Males

12941

M18-39

12941

23M→24M

23.0 - 24.0 mi

Top 80%
×6stories
+12ft-82ft

Overall

22862

Males

13232

M18-39

13232

24M→40K

24.0 - 24.9 mi

Top 87%
×1story
+6ft-20ft

Overall

24850

Males

14182

M18-39

14182

40K→25.2M

24.9 - 25.2 mi

Top 76%
×1story
+13ft-16ft

Overall

21540

Males

12563

M18-39

12563

25.2M→Finish

25.2 - 26.2 mi

Top 77%
×2stories
+22ft-21ft

Overall

21973

Males

12778

M18-39

12778

Passing Analysis

Category:
Athletes Passed
3351
Passed By
497
Net Change
+2854
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#26707
5K → 10K47839+439#26707#26268
10K → 15K11020+1102#26268#25166
15K → 20K6820+682#25166#24484
20K → Half832+81#24484#24403
Half → 25K23632+204#24403#24199
25K → 30K109214-105#24199#24304
30K → 20M16610+156#24304#24148
20M → 21M7454+20#24148#24128
21M → 35K902+88#24128#24040
35K → 23M1367+129#24040#23911
23M → 24M6717+50#23911#23861
24M → 40K2293-71#23861#23932
40K → 25.2M377+30#23932#23902
25.2M → Finish6920+49#23902#23853
TOTALS3351497+2854
📊

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