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BOSTON MARATHON 2023

Brendan O'Brien

Bib: 18108•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 (M55-59)
#0 / 1422
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:54/mi
27:39
↑ 97↓ 3451.5%
10K· 6.21 mi
8:49/mi
55:03
↑ 79↓ 1380.4%
15K· 9.32 mi
8:54/mi
1:22:41
↑ 67↓ 78
20K· 12.43 mi
9:01/mi
1:50:41
↑ 106↓ 860.1%
Half· 13.11 mi
8:55/mi
1:56:46
↑ 19↓ 370.5%
25K· 15.53 mi
9:11/mi
2:19:03
↑ 66↓ 880.2%
30K· 18.64 mi
10:34/mi
2:51:54
↑ 181↓ 1480.2%
20M
11:19/mi
3:07:17
↑ 64↓ 500.2%
21M
11:31/mi
3:18:48
↑ 106↓ 241.6%
35K· 21.75 mi
11:58/mi
3:27:45
↑ 17↓ 861.7%
23M
12:06/mi
3:42:54
↑ 23↓ 630.6%
24M
11:21/mi
3:54:15
↓ 821.3%
40K· 24.85 mi
11:10/mi
4:03:48
↓ 200.3%
25.2M
11:45/mi
4:07:51
↑ 13↓ 160.2%
Finish· 26.22 mi
10:26/mi
4:18:29
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:56:46
Pace8:54 /mi
2nd Half
Distance13.11 mi
Time2:21:43
Pace10:49 /mi
📊Positive Split: 21.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:0027:398:5427:39
8:54
-
10K
6.21 mi11:46:2455:038:5227:24
8:49
-0:05
15K
9.32 mi12:14:021:22:418:5227:38
8:54
+0:05
20K
12.43 mi12:42:021:50:418:5428:00
9:01
+0:07
Half
13.11 mi12:48:071:56:468:546:05
8:55
-0:06
25K
15.53 mi13:10:242:19:038:5722:17
9:11
+0:16
30K
18.64 mi13:43:152:51:549:1332:51
10:34
+1:23
20M
20.00 mi13:58:383:07:179:2215:23
11:19
+0:45
21M
21.00 mi14:10:093:18:489:2811:31
11:31
+0:12
35K
21.75 mi14:19:063:27:459:338:57
11:58
+0:27
23M
23.00 mi14:34:153:42:549:4115:09
12:06
+0:08
24M
24.00 mi14:45:363:54:159:4611:21
11:21
-0:45
40K
24.85 mi14:55:094:03:489:499:33
11:10
-0:11
25.2M
25.20 mi14:59:124:07:519:504:03
11:45
+0:35
Finish
26.22 mi15:09:504:18:299:5210:38
10:26
-1:19

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

8:49 /mi

Average Pace

9:52 /mi

Slowest Pace

12:06 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:19:03

54% of race

Time at Steady Pace

53:02

21% of race

Time at Slower Pace

1:06:24

26% of race

Average Pace: 9:51 /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 mi11:19:0027:398:5427:39
8:54
#19983
10K
6.21 mi11:46:2455:038:5227:24
8:49
#19980
15K
9.32 mi12:14:021:22:418:5227:38
8:54
#19979
20K
12.43 mi12:42:021:50:418:5428:00
9:01
#19889
Half
13.11 mi12:48:071:56:468:546:05
8:55
#19883
25K
15.53 mi13:10:242:19:038:5722:17
9:11
#19893
30K
18.64 mi13:43:152:51:549:1332:51
10:34
#20534
20M
20.00 mi13:58:383:07:179:2215:23
11:19
#20844
21M
21.00 mi14:10:093:18:489:2811:31
11:31
#20908
35K
21.75 mi14:19:063:27:459:338:57
11:58
#21144
23M
23.00 mi14:34:153:42:549:4115:09
12:06
#21423
24M
24.00 mi14:45:363:54:159:4611:21
11:21
#21559
40K
24.85 mi14:55:094:03:489:499:33
11:10
#21639
25.2M
25.20 mi14:59:124:07:519:504:03
11:45
#21644
Finish
26.22 mi15:09:504:18:299:5210:38
10:26
#21682
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi19983121561215620021(Top 75%)12307(Top 81%)12307(Top 865%)
10K6.21 mi3.10 mi19980+312205-4912205-4920040(Top 75%)12302(Top 81%)12302(Top 865%)
15K9.32 mi3.11 mi19979+112233-2812233-2820021(Top 75%)12307(Top 81%)12307(Top 865%)
20K12.43 mi3.11 mi19889+9012216+1712216+1719758(Top 74%)12209(Top 80%)12209(Top 859%)
Half13.11 mi0.68 mi19883+612207+912207+920052(Top 75%)12346(Top 81%)12346(Top 868%)
25K15.53 mi2.42 mi19893-1012220-1312220-1319801(Top 74%)12199(Top 80%)12199(Top 858%)
30K18.64 mi3.11 mi20534-64112489-26912489-26922354(Top 84%)13228(Top 87%)13228(Top 930%)
20M20.00 mi1.36 mi20844-31012619-13012619-13023213(Top 87%)13557(Top 89%)13557(Top 953%)
21M21.00 mi1.00 mi20908-6412630-1112630-1121902(Top 82%)12936(Top 85%)12936(Top 910%)
35K21.75 mi0.75 mi21144-23612720-9012720-9024644(Top 93%)14142(Top 93%)14142(Top 995%)
23M23.00 mi1.25 mi21423-27912843-12312843-12324129(Top 91%)13907(Top 92%)13907(Top 978%)
24M24.00 mi1.00 mi21559-13612891-4812891-4823663(Top 89%)13659(Top 90%)13659(Top 961%)
40K24.85 mi0.85 mi21639-8012920-2912920-2922675(Top 85%)13163(Top 87%)13163(Top 926%)
25.2M25.20 mi0.35 mi21644-512913+712913+722024(Top 83%)12857(Top 85%)12857(Top 904%)
Finish26.22 mi1.02 mi21682-3812924-1112924-1122867(Top 86%)13261(Top 87%)13261(Top 933%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 75%
×21story building
+97ft-345ft

Overall

20021

Males

12307

M55-59

12307

5K→10K

3.1 - 6.2 mi

Top 75%
×5story building
+79ft-138ft

Overall

20040

Males

12302

M55-59

12302

10K→15K

6.2 - 9.3 mi

Top 75%
×3story building
+67ft-78ft

Overall

20021

Males

12307

M55-59

12307

15K→20K

9.3 - 12.4 mi

Top 74%
×5story building
+106ft-86ft

Overall

19758

Males

12209

M55-59

12209

20K→Half

12.4 - 13.1 mi

Top 75%
×2story building
+19ft-37ft

Overall

20052

Males

12346

M55-59

12346

Half→25K

13.1 - 15.5 mi

Top 74%
×4story building
+66ft-88ft

Overall

19801

Males

12199

M55-59

12199

25K→30K

15.5 - 18.6 mi

Top 84%
×9story building
+181ft-148ft

Overall

22354

Males

13228

M55-59

13228

30K→20M

18.6 - 20.0 mi

Top 87%
×5story building
+64ft-50ft

Overall

23213

Males

13557

M55-59

13557

20M→21M

20.0 - 21.0 mi

Top 82%
×8story building
+106ft-24ft

Overall

21902

Males

12936

M55-59

12936

21M→35K

21.0 - 21.8 mi

Top 93%
×7story building
+17ft-86ft

Overall

24644

Males

14142

M55-59

14142

35K→23M

21.8 - 23.0 mi

Top 91%
×5story building
+23ft-63ft

Overall

24129

Males

13907

M55-59

13907

23M→24M

23.0 - 24.0 mi

Top 89%
×6story building
+12ft-82ft

Overall

23663

Males

13659

M55-59

13659

24M→40K

24.0 - 24.9 mi

Top 85%
×1story
+6ft-20ft

Overall

22675

Males

13163

M55-59

13163

40K→25.2M

24.9 - 25.2 mi

Top 83%
×1story
+13ft-16ft

Overall

22024

Males

12857

M55-59

12857

25.2M→Finish

25.2 - 26.2 mi

Top 86%
×2story building
+22ft-21ft

Overall

22867

Males

13261

M55-59

13261

Passing Analysis

Category:
Athletes Passed
1055
Passed By
2754
Net Change
-1699
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19983
5K → 10K306303+3#19983#19980
10K → 15K192191+1#19980#19979
15K → 20K218128+90#19979#19889
20K → Half3024+6#19889#19883
Half → 25K124134-10#19883#19893
25K → 30K33674-641#19893#20534
30K → 20M18328-310#20534#20844
20M → 21M37101-64#20844#20908
21M → 35K5241-236#20908#21144
35K → 23M21300-279#21144#21423
23M → 24M11147-136#21423#21559
24M → 40K20100-80#21559#21639
40K → 25.2M2025-5#21639#21644
25.2M → Finish2058-38#21644#21682
TOTALS10552754-1699
📊

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