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BOSTON MARATHON 2025

Neil O'Brien

Bib: 3412•M

IN

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 13%
Gender (Male)
#0 / 16105
Top 22%
Division (M18-39)
#0 / 5642
Top 46%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:00
Rank: #5969
Start → 5K
21:00 | 6:46/mi
10K· 6.21 mi
41:54
Rank: #5762 (+207)
5K → 10K
20:54 | 6:44/mi
15K· 9.32 mi
1:02:45
Rank: #5547 (+215)
10K → 15K
20:51 | 6:43/mi
20K· 12.43 mi
1:23:24
Rank: #5088 (+459)
15K → 20K
20:39 | 6:39/mi
Half· 13.11 mi
1:27:54
Rank: #5035 (+53)
20K → Half
4:30 | 6:36/mi
25K· 15.53 mi
1:44:07
Rank: #4817 (+218)
Half → 25K
16:13 | 6:41/mi
30K· 18.64 mi
2:04:54
Rank: #4316 (+501)
25K → 30K
20:47 | 6:41/mi
20M
2:14:09
Rank: #4164 (+152)
30K → 20M
9:15 | 6:48/mi
21M
2:21:10
Rank: #4012 (+152)
20M → 21M
7:01 | 7:01/mi
35K· 21.75 mi
2:26:17
Rank: #4008 (+4)
21M → 35K
5:07 | 6:50/mi
23M
2:35:04
Rank: #3960 (+48)
35K → 23M
8:47 | 7:01/mi
24M
2:41:45
Rank: #3887 (+73)
23M → 24M
6:41 | 6:41/mi
40K· 24.85 mi
2:47:43
Rank: #3854 (+33)
24M → 40K
5:58 | 6:59/mi
25.2M
2:50:14
Rank: #3801 (+53)
40K → 25.2M
2:31 | 7:18/mi
Finish· 26.22 mi
2:56:56
Rank: #3725 (+76)
25.2M → Finish
6:42 | 6:34/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:54
Pace6:42 /mi
2nd Half
Distance13.11 mi
Time1:29:02
Pace6:48 /mi
📊Positive Split: 1.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:3721:006:4621:00
6:46
-
10K
6.21 mi10:44:3141:546:4520:54
6:44
-0:02
15K
9.32 mi11:05:221:02:456:4420:51
6:43
-0:01
20K
12.43 mi11:26:011:23:246:4320:39
6:39
-0:04
Half
13.11 mi11:30:311:27:546:424:30
6:36
-0:03
25K
15.53 mi11:46:441:44:076:4216:13
6:41
+0:05
30K
18.64 mi12:07:312:04:546:4220:47
6:41
0:00
20M
20.00 mi12:16:462:14:096:429:15
6:48
+0:07
21M
21.00 mi12:23:472:21:106:437:01
7:01
+0:13
35K
21.75 mi12:28:542:26:176:445:07
6:50
-0:11
23M
23.00 mi12:37:412:35:046:458:47
7:01
+0:11
24M
24.00 mi12:44:222:41:456:446:41
6:41
-0:20
40K
24.85 mi12:50:202:47:436:455:58
6:59
+0:18
25.2M
25.20 mi12:52:512:50:146:452:31
7:18
+0:19
Finish
26.22 mi12:59:332:56:566:456:42
6:34
-0:44

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

6:34 /mi

Average Pace

6:45 /mi

Slowest Pace

7:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:54:25

99% of race

Time at Steady Pace

2:31

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:45 /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 mi10:23:3721:006:4621:00
6:46
#5969
10K
6.21 mi10:44:3141:546:4520:54
6:44
#5762
15K
9.32 mi11:05:221:02:456:4420:51
6:43
#5547
20K
12.43 mi11:26:011:23:246:4320:39
6:39
#5088
Half
13.11 mi11:30:311:27:546:424:30
6:36
#5035
25K
15.53 mi11:46:441:44:076:4216:13
6:41
#4817
30K
18.64 mi12:07:312:04:546:4220:47
6:41
#4316
20M
20.00 mi12:16:462:14:096:429:15
6:48
#4164
21M
21.00 mi12:23:472:21:106:437:01
7:01
#4012
35K
21.75 mi12:28:542:26:176:445:07
6:50
#4008
23M
23.00 mi12:37:412:35:046:458:47
7:01
#3960
24M
24.00 mi12:44:222:41:456:446:41
6:41
#3887
40K
24.85 mi12:50:202:47:436:455:58
6:59
#3854
25.2M
25.20 mi12:52:512:50:146:452:31
7:18
#3801
Finish
26.22 mi12:59:332:56:566:456:42
6:34
#3725
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi5969548854885158(Top 18%)4771(Top 30%)4771(Top 85%)
10K6.21 mi3.10 mi5762+2075313+1755313+1755568(Top 20%)5117(Top 32%)5117(Top 91%)
15K9.32 mi3.11 mi5547+2155120+1935120+1935158(Top 18%)4771(Top 30%)4771(Top 85%)
20K12.43 mi3.11 mi5088+4594727+3934727+3933977(Top 14%)3739(Top 23%)3739(Top 66%)
Half13.11 mi0.68 mi5035+534681+464681+464296(Top 15%)4018(Top 25%)4018(Top 71%)
25K15.53 mi2.42 mi4817+2184480+2014480+2014033(Top 14%)3757(Top 23%)3757(Top 67%)
30K18.64 mi3.11 mi4316+5014037+4434037+4432834(Top 10%)2679(Top 17%)2679(Top 47%)
20M20.00 mi1.36 mi4164+1523898+1393898+1392956(Top 10%)2755(Top 17%)2755(Top 49%)
21M21.00 mi1.00 mi4012+1523756+1423756+1422322(Top 8%)2168(Top 13%)2168(Top 38%)
35K21.75 mi0.75 mi4008+43745+113745+114294(Top 15%)3823(Top 24%)3823(Top 68%)
23M23.00 mi1.25 mi3960+483690+553690+553814(Top 13%)3427(Top 21%)3427(Top 61%)
24M24.00 mi1.00 mi3887+733617+733617+732892(Top 10%)2632(Top 16%)2632(Top 47%)
40K24.85 mi0.85 mi3854+333579+383579+383733(Top 13%)3278(Top 20%)3278(Top 58%)
25.2M25.20 mi0.35 mi3801+533532+473532+472491(Top 9%)2225(Top 14%)2225(Top 39%)
Finish26.22 mi1.02 mi3725+763463+693463+693181(Top 11%)2813(Top 17%)2813(Top 50%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 18%
×21stories
+97ft-345ft

Overall

5158

Males

4771

M18-39

4771

5K→10K

3.1 - 6.2 mi

Top 20%
×5stories
+79ft-138ft

Overall

5568

Males

5117

M18-39

5117

10K→15K

6.2 - 9.3 mi

Top 18%
×3stories
+67ft-78ft

Overall

5158

Males

4771

M18-39

4771

15K→20K

9.3 - 12.4 mi

Top 14%
×5stories
+106ft-86ft

Overall

3977

Males

3739

M18-39

3739

20K→Half

12.4 - 13.1 mi

Top 15%
×2stories
+19ft-37ft

Overall

4296

Males

4018

M18-39

4018

Half→25K

13.1 - 15.5 mi

Top 14%
×4stories
+66ft-88ft

Overall

4033

Males

3757

M18-39

3757

25K→30K

15.5 - 18.6 mi

Top 10%
×9stories
+181ft-148ft

Overall

2834

Males

2679

M18-39

2679

30K→20M

18.6 - 20.0 mi

Top 10%
×5stories
+64ft-50ft

Overall

2956

Males

2755

M18-39

2755

20M→21M

20.0 - 21.0 mi

Top 8%
×8stories
+106ft-24ft

Overall

2322

Males

2168

M18-39

2168

21M→35K

21.0 - 21.8 mi

Top 15%
×7stories
+17ft-86ft

Overall

4294

Males

3823

M18-39

3823

35K→23M

21.8 - 23.0 mi

Top 13%
×5stories
+23ft-63ft

Overall

3814

Males

3427

M18-39

3427

23M→24M

23.0 - 24.0 mi

Top 10%
×6stories
+12ft-82ft

Overall

2892

Males

2632

M18-39

2632

24M→40K

24.0 - 24.9 mi

Top 13%
×1story
+6ft-20ft

Overall

3733

Males

3278

M18-39

3278

40K→25.2M

24.9 - 25.2 mi

Top 9%
×1story
+13ft-16ft

Overall

2491

Males

2225

M18-39

2225

25.2M→Finish

25.2 - 26.2 mi

Top 11%
×2stories
+22ft-21ft

Overall

3181

Males

2813

M18-39

2813

Passing Analysis

Category:
Athletes Passed
2552
Passed By
308
Net Change
+2244
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5969
5K → 10K29992+207#5969#5762
10K → 15K24833+215#5762#5547
15K → 20K4623+459#5547#5088
20K → Half585+53#5088#5035
Half → 25K23113+218#5035#4817
25K → 30K5021+501#4817#4316
30K → 20M16311+152#4316#4164
20M → 21M1575+152#4164#4012
21M → 35K4137+4#4012#4008
35K → 23M9244+48#4008#3960
23M → 24M9118+73#3960#3887
24M → 40K5724+33#3887#3854
40K → 25.2M541+53#3854#3801
25.2M → Finish9721+76#3801#3725
TOTALS2552308+2244
📊

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