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BOSTON MARATHON 2023

Christopher O'Brien

Bib: 29445•M

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M40-44)
#0 / 2241
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
28:43
Rank: #21348
Start → 5K
9:15/mi
28:43 split
10K· 6.21 mi
56:51
Rank: #21239 (+109)
5K → 10K
9:03/mi
28:08 split
15K· 9.32 mi
1:25:12
Rank: #21180 (+59)
10K → 15K
9:07/mi
28:21 split
20K· 12.43 mi
1:53:58
Rank: #21076 (+104)
15K → 20K
9:16/mi
28:46 split
Half· 13.11 mi
2:00:26
Rank: #21143 (-67)
20K → Half
9:29/mi
6:28 split
25K· 15.53 mi
2:24:04
Rank: #21197 (-54)
Half → 25K
9:45/mi
23:38 split
30K· 18.64 mi
2:58:56
Rank: #21741 (-544)
25K → 30K
11:13/mi
34:52 split
20M
3:16:27
Rank: #22210 (-469)
30K → 20M
12:53/mi
17:31 split
21M
3:30:04
Rank: #22423 (-213)
20M → 21M
13:37/mi
13:37 split
35K· 21.75 mi
3:38:28
Rank: #22492 (-69)
21M → 35K
11:14/mi
8:24 split
23M
3:53:54
Rank: #22632 (-140)
35K → 23M
12:20/mi
15:26 split
24M
4:04:52
Rank: #22639 (-7)
23M → 24M
10:58/mi
10:58 split
40K· 24.85 mi
4:14:26
Rank: #22655 (-16)
24M → 40K
11:11/mi
9:34 split
25.2M
4:18:58
Rank: #22686 (-31)
40K → 25.2M
13:09/mi
4:32 split
Finish· 26.22 mi
4:29:55
Rank: #22726 (-40)
25.2M → Finish
10:45/mi
10:57 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:00:26
Pace9:11 /mi
2nd Half
Distance13.11 mi
Time2:29:29
Pace11:24 /mi
📊Positive Split: 24.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:5428:439:1528:43
9:15
-
10K
6.21 mi12:15:0256:519:0928:08
9:03
-0:12
15K
9.32 mi12:43:231:25:129:0828:21
9:07
+0:04
20K
12.43 mi13:12:091:53:589:1028:46
9:16
+0:09
Half
13.11 mi13:18:372:00:269:116:28
9:29
+0:13
25K
15.53 mi13:42:152:24:049:1623:38
9:45
+0:16
30K
18.64 mi14:17:072:58:569:3634:52
11:13
+1:28
20M
20.00 mi14:34:383:16:279:4917:31
12:53
+1:40
21M
21.00 mi14:48:153:30:0410:0013:37
13:37
+0:44
35K
21.75 mi14:56:393:38:2810:038:24
11:14
-2:23
23M
23.00 mi15:12:053:53:5410:1015:26
12:20
+1:06
24M
24.00 mi15:23:034:04:5210:1210:58
10:58
-1:22
40K
24.85 mi15:32:374:14:2610:149:34
11:11
+0:13
25.2M
25.20 mi15:37:094:18:5810:174:32
13:09
+1:58
Finish
26.22 mi15:48:064:29:5510:1810:57
10:45
-2:24

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

9:03 /mi

Average Pace

10:18 /mi

Slowest Pace

13:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:24:04

53% of race

Time at Steady Pace

1:14:45

28% of race

Time at Slower Pace

51:06

19% of race

Average Pace: 10:18 /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 mi11:46:5428:439:1528:43
9:15
#21348
10K
6.21 mi12:15:0256:519:0928:08
9:03
#21239
15K
9.32 mi12:43:231:25:129:0828:21
9:07
#21180
20K
12.43 mi13:12:091:53:589:1028:46
9:16
#21076
Half
13.11 mi13:18:372:00:269:116:28
9:29
#21143
25K
15.53 mi13:42:152:24:049:1623:38
9:45
#21197
30K
18.64 mi14:17:072:58:569:3634:52
11:13
#21741
20M
20.00 mi14:34:383:16:279:4917:31
12:53
#22210
21M
21.00 mi14:48:153:30:0410:0013:37
13:37
#22423
35K
21.75 mi14:56:393:38:2810:038:24
11:14
#22492
23M
23.00 mi15:12:053:53:5410:1015:26
12:20
#22632
24M
24.00 mi15:23:034:04:5210:1210:58
10:58
#22639
40K
24.85 mi15:32:374:14:2610:149:34
11:11
#22655
25.2M
25.20 mi15:37:094:18:5810:174:32
13:09
#22686
Finish
26.22 mi15:48:064:29:5510:1810:57
10:45
#22726
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi21348127771277721038(Top 79%)12765(Top 84%)12765(Top 570%)
10K6.21 mi3.10 mi21239+10912779-212779-221086(Top 79%)12751(Top 84%)12751(Top 569%)
15K9.32 mi3.11 mi21180+5912782-312782-321038(Top 79%)12765(Top 84%)12765(Top 570%)
20K12.43 mi3.11 mi21076+10412740+4212740+4220816(Top 78%)12677(Top 84%)12677(Top 566%)
Half13.11 mi0.68 mi21143-6712779-3912779-3922054(Top 83%)13224(Top 87%)13224(Top 590%)
25K15.53 mi2.42 mi21197-5412801-2212801-2221601(Top 81%)12964(Top 85%)12964(Top 578%)
30K18.64 mi3.11 mi21741-54413033-23213033-23223448(Top 88%)13719(Top 90%)13719(Top 612%)
20M20.00 mi1.36 mi22210-46913223-19013223-19025075(Top 94%)14408(Top 95%)14408(Top 643%)
21M21.00 mi1.00 mi22423-21313298-7513298-7524689(Top 93%)14217(Top 94%)14217(Top 634%)
35K21.75 mi0.75 mi22492-6913329-3113329-3123680(Top 89%)13676(Top 90%)13676(Top 610%)
23M23.00 mi1.25 mi22632-14013382-5313382-5324391(Top 92%)14032(Top 92%)14032(Top 626%)
24M24.00 mi1.00 mi22639-713375+713375+722983(Top 86%)13335(Top 88%)13335(Top 595%)
40K24.85 mi0.85 mi22655-16133751337522715(Top 85%)13184(Top 87%)13184(Top 588%)
25.2M25.20 mi0.35 mi22686-3113386-1113386-1124120(Top 91%)13848(Top 91%)13848(Top 618%)
Finish26.22 mi1.02 mi22726-4013404-1813404-1823481(Top 88%)13564(Top 89%)13564(Top 605%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 79%
×21story building
+97ft-345ft

Overall

21038

Males

12765

M40-44

12765

5K→10K

3.1 - 6.2 mi

Top 79%
×5story building
+79ft-138ft

Overall

21086

Males

12751

M40-44

12751

10K→15K

6.2 - 9.3 mi

Top 79%
×3story building
+67ft-78ft

Overall

21038

Males

12765

M40-44

12765

15K→20K

9.3 - 12.4 mi

Top 78%
×5story building
+106ft-86ft

Overall

20816

Males

12677

M40-44

12677

20K→Half

12.4 - 13.1 mi

Top 83%
×2story building
+19ft-37ft

Overall

22054

Males

13224

M40-44

13224

Half→25K

13.1 - 15.5 mi

Top 81%
×4story building
+66ft-88ft

Overall

21601

Males

12964

M40-44

12964

25K→30K

15.5 - 18.6 mi

Top 88%
×9story building
+181ft-148ft

Overall

23448

Males

13719

M40-44

13719

30K→20M

18.6 - 20.0 mi

Top 94%
×5story building
+64ft-50ft

Overall

25075

Males

14408

M40-44

14408

20M→21M

20.0 - 21.0 mi

Top 93%
×8story building
+106ft-24ft

Overall

24689

Males

14217

M40-44

14217

21M→35K

21.0 - 21.8 mi

Top 89%
×7story building
+17ft-86ft

Overall

23680

Males

13676

M40-44

13676

35K→23M

21.8 - 23.0 mi

Top 92%
×5story building
+23ft-63ft

Overall

24391

Males

14032

M40-44

14032

23M→24M

23.0 - 24.0 mi

Top 86%
×6story building
+12ft-82ft

Overall

22983

Males

13335

M40-44

13335

24M→40K

24.0 - 24.9 mi

Top 85%
×1story
+6ft-20ft

Overall

22715

Males

13184

M40-44

13184

40K→25.2M

24.9 - 25.2 mi

Top 91%
×1story
+13ft-16ft

Overall

24120

Males

13848

M40-44

13848

25.2M→Finish

25.2 - 26.2 mi

Top 88%
×2story building
+22ft-21ft

Overall

23481

Males

13564

M40-44

13564

Passing Analysis

Category:
Athletes Passed
995
Passed By
2373
Net Change
-1378
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21348
5K → 10K339230+109#21348#21239
10K → 15K190131+59#21239#21180
15K → 20K19490+104#21180#21076
20K → Half1178-67#21076#21143
Half → 25K81135-54#21143#21197
25K → 30K28572-544#21197#21741
30K → 20M8477-469#21741#22210
20M → 21M11224-213#22210#22423
21M → 35K2291-69#22423#22492
35K → 23M27167-140#22492#22632
23M → 24M3138-7#22632#22639
24M → 40K2440-16#22639#22655
40K → 25.2M536-31#22655#22686
25.2M → Finish2464-40#22686#22726
TOTALS9952373-1378
📊

Passing Visuals

Category:
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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