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BOSTON MARATHON 2023

James O'brien

Bib: 30840•M

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Division (M18-39)
#0 / 5285
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
32:07
Rank: #24312
Start → 5K
32:07 | 10:20/mi
10K· 6.21 mi
1:03:54
Rank: #24229 (+83)
5K → 10K
31:47 | 10:14/mi
15K· 9.32 mi
1:38:34
Rank: #24769 (-540)
10K → 15K
34:40 | 11:09/mi
20K· 12.43 mi
2:20:23
Rank: #25582 (-813)
15K → 20K
41:49 | 13:28/mi
Half· 13.11 mi
2:29:29
Rank: #25692 (-110)
20K → Half
9:06 | 13:20/mi
25K· 15.53 mi
3:04:22
Rank: #25910 (-218)
Half → 25K
34:53 | 14:23/mi
30K· 18.64 mi
3:46:19
Rank: #25900 (+10)
25K → 30K
41:57 | 13:30/mi
20M
4:04:23
Rank: #25862 (+38)
30K → 20M
18:04 | 13:18/mi
21M
4:20:08
Rank: #25898 (-36)
20M → 21M
15:45 | 15:45/mi
35K· 21.75 mi
4:30:02
Rank: #25905 (-7)
21M → 35K
9:54 | 13:14/mi
23M
4:46:56
Rank: #25885 (+20)
35K → 23M
16:54 | 13:30/mi
24M
4:59:38
Rank: #25861 (+24)
23M → 24M
12:42 | 12:42/mi
40K· 24.85 mi
5:11:16
Rank: #25865 (-4)
24M → 40K
11:38 | 13:36/mi
25.2M
5:16:26
Rank: #25864 (+1)
40K → 25.2M
5:10 | 14:59/mi
Finish· 26.22 mi
5:28:01
Rank: #25832 (+32)
25.2M → Finish
11:35 | 11:22/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:29:29
Pace11:24 /mi
2nd Half
Distance13.11 mi
Time2:58:32
Pace13:37 /mi
📊Positive Split: 19.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:2632:0710:2032:07
10:20
-
10K
6.21 mi12:23:131:03:5410:1731:47
10:14
-0:06
15K
9.32 mi12:57:531:38:3410:3534:40
11:09
+0:55
20K
12.43 mi13:39:422:20:2311:1841:49
13:28
+2:19
Half
13.11 mi13:48:482:29:2911:249:06
13:20
-0:08
25K
15.53 mi14:23:413:04:2211:5234:53
14:23
+1:03
30K
18.64 mi15:05:383:46:1912:0841:57
13:30
-0:53
20M
20.00 mi15:23:424:04:2312:1318:04
13:18
-0:12
21M
21.00 mi15:39:274:20:0812:2315:45
15:45
+2:27
35K
21.75 mi15:49:214:30:0212:259:54
13:14
-2:31
23M
23.00 mi16:06:154:46:5612:2916:54
13:30
+0:16
24M
24.00 mi16:18:574:59:3812:2912:42
12:42
-0:48
40K
24.85 mi16:30:355:11:1612:3111:38
13:36
+0:54
25.2M
25.20 mi16:35:455:16:2612:335:10
14:59
+1:23
Finish
26.22 mi16:47:205:28:0112:3111:35
11:22
-3:37

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

10:14 /mi

Average Pace

12:31 /mi

Slowest Pace

15:45 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:50:09

34% of race

Time at Steady Pace

2:42:04

49% of race

Time at Slower Pace

55:48

17% of race

Average Pace: 12:31 /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 mi11:51:2632:0710:2032:07
10:20
#24312
10K
6.21 mi12:23:131:03:5410:1731:47
10:14
#24229
15K
9.32 mi12:57:531:38:3410:3534:40
11:09
#24769
20K
12.43 mi13:39:422:20:2311:1841:49
13:28
#25582
Half
13.11 mi13:48:482:29:2911:249:06
13:20
#25692
25K
15.53 mi14:23:413:04:2211:5234:53
14:23
#25910
30K
18.64 mi15:05:383:46:1912:0841:57
13:30
#25900
20M
20.00 mi15:23:424:04:2312:1318:04
13:18
#25862
21M
21.00 mi15:39:274:20:0812:2315:45
15:45
#25898
35K
21.75 mi15:49:214:30:0212:259:54
13:14
#25905
23M
23.00 mi16:06:154:46:5612:2916:54
13:30
#25885
24M
24.00 mi16:18:574:59:3812:2912:42
12:42
#25861
40K
24.85 mi16:30:355:11:1612:3111:38
13:36
#25865
25.2M
25.20 mi16:35:455:16:2612:335:10
14:59
#25864
Finish
26.22 mi16:47:205:28:0112:3111:35
11:22
#25832
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi24312142441424425377(Top 95%)14687(Top 97%)14687(Top 278%)
10K6.21 mi3.10 mi24229+8314194+5014194+5024187(Top 91%)14179(Top 93%)14179(Top 268%)
15K9.32 mi3.11 mi24769-54014428-23414428-23425377(Top 95%)14687(Top 97%)14687(Top 278%)
20K12.43 mi3.11 mi25582-81314765-33714765-33726408(Top 99%)15084(Top 99%)15084(Top 285%)
Half13.11 mi0.68 mi25692-11014802-3714802-3726434(Top 99%)15086(Top 99%)15086(Top 285%)
25K15.53 mi2.42 mi25910-21814895-9314895-9326455(Top 99%)15099(Top 99%)15099(Top 286%)
30K18.64 mi3.11 mi25900+1014883+1214883+1225743(Top 97%)14751(Top 97%)14751(Top 279%)
20M20.00 mi1.36 mi25862+3814862+2114862+2125403(Top 95%)14577(Top 96%)14577(Top 276%)
21M21.00 mi1.00 mi25898-3614875-1314875-1326126(Top 98%)14915(Top 98%)14915(Top 282%)
35K21.75 mi0.75 mi25905-714873+214873+225719(Top 97%)14692(Top 97%)14692(Top 278%)
23M23.00 mi1.25 mi25885+2014862+1114862+1125497(Top 96%)14579(Top 96%)14579(Top 276%)
24M24.00 mi1.00 mi25861+2414851+1114851+1125238(Top 95%)14418(Top 95%)14418(Top 273%)
40K24.85 mi0.85 mi25865-414850+114850+125421(Top 95%)14519(Top 96%)14519(Top 275%)
25.2M25.20 mi0.35 mi25864+114848+214848+225697(Top 97%)14647(Top 97%)14647(Top 277%)
Finish26.22 mi1.02 mi25832+3214825+2314825+2324513(Top 92%)14081(Top 93%)14081(Top 266%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 95%
×21stories
+97ft-345ft

Overall

25377

Males

14687

M18-39

14687

5K→10K

3.1 - 6.2 mi

Top 91%
×5stories
+79ft-138ft

Overall

24187

Males

14179

M18-39

14179

10K→15K

6.2 - 9.3 mi

Top 95%
×3stories
+67ft-78ft

Overall

25377

Males

14687

M18-39

14687

15K→20K

9.3 - 12.4 mi

Top 99%
×5stories
+106ft-86ft

Overall

26408

Males

15084

M18-39

15084

20K→Half

12.4 - 13.1 mi

Top 99%
×2stories
+19ft-37ft

Overall

26434

Males

15086

M18-39

15086

Half→25K

13.1 - 15.5 mi

Top 99%
×4stories
+66ft-88ft

Overall

26455

Males

15099

M18-39

15099

25K→30K

15.5 - 18.6 mi

Top 97%
×9stories
+181ft-148ft

Overall

25743

Males

14751

M18-39

14751

30K→20M

18.6 - 20.0 mi

Top 95%
×5stories
+64ft-50ft

Overall

25403

Males

14577

M18-39

14577

20M→21M

20.0 - 21.0 mi

Top 98%
×8stories
+106ft-24ft

Overall

26126

Males

14915

M18-39

14915

21M→35K

21.0 - 21.8 mi

Top 97%
×7stories
+17ft-86ft

Overall

25719

Males

14692

M18-39

14692

35K→23M

21.8 - 23.0 mi

Top 96%
×5stories
+23ft-63ft

Overall

25497

Males

14579

M18-39

14579

23M→24M

23.0 - 24.0 mi

Top 95%
×6stories
+12ft-82ft

Overall

25238

Males

14418

M18-39

14418

24M→40K

24.0 - 24.9 mi

Top 95%
×1story
+6ft-20ft

Overall

25421

Males

14519

M18-39

14519

40K→25.2M

24.9 - 25.2 mi

Top 97%
×1story
+13ft-16ft

Overall

25697

Males

14647

M18-39

14647

25.2M→Finish

25.2 - 26.2 mi

Top 92%
×2stories
+22ft-21ft

Overall

24513

Males

14081

M18-39

14081

Passing Analysis

Category:
Athletes Passed
491
Passed By
2011
Net Change
-1520
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24312
5K → 10K235152+83#24312#24229
10K → 15K22562-540#24229#24769
15K → 20K1814-813#24769#25582
20K → Half1111-110#25582#25692
Half → 25K9227-218#25692#25910
25K → 30K5646+10#25910#25900
30K → 20M435+38#25900#25862
20M → 21M743-36#25862#25898
21M → 35K1118-7#25898#25905
35K → 23M277+20#25905#25885
23M → 24M262+24#25885#25861
24M → 40K1216-4#25861#25865
40K → 25.2M98+1#25865#25864
25.2M → Finish320+32#25864#25832
TOTALS4912011-1520
📊

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