Boston Marathon logo
BOSTON MARATHON 2023

Ronnie O'brien

Bib: 31857•M

MA

0:00
0:00
/ mi
Masters
Be the first to cheer!
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

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
9:42/mi
30:09
↑ 97↓ 3451.5%
10K· 6.21 mi
9:19/mi
59:07
↑ 79↓ 1380.4%
15K· 9.32 mi
9:36/mi
1:28:57
↑ 67↓ 78
20K· 12.43 mi
9:05/mi
1:57:10
↑ 106↓ 860.1%
Half· 13.11 mi
9:17/mi
2:03:30
↑ 19↓ 370.5%
25K· 15.53 mi
10:25/mi
2:28:46
↑ 66↓ 880.2%
30K· 18.64 mi
11:23/mi
3:04:07
↑ 181↓ 1480.2%
20M
9:29/mi
3:17:00
↑ 64↓ 500.2%
21M
9:21/mi
3:26:21
↑ 106↓ 241.6%
35K· 21.75 mi
8:24/mi
3:32:38
↑ 17↓ 861.7%
23M
8:22/mi
3:43:07
↑ 23↓ 630.6%
24M
8:16/mi
3:51:23
↓ 821.3%
40K· 24.85 mi
8:36/mi
3:58:44
↓ 200.3%
25.2M
9:14/mi
4:01:55
↑ 13↓ 160.2%
Finish· 26.22 mi
8:29/mi
4:10:34
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:03:30
Pace9:25 /mi
2nd Half
Distance13.11 mi
Time2:07:04
Pace9:42 /mi
📊Positive Split: 2.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:53:0130:099:4230:09
9:42
-
10K
6.21 mi12:21:5959:079:3128:58
9:19
-0:23
15K
9.32 mi12:51:491:28:579:3329:50
9:36
+0:17
20K
12.43 mi13:20:021:57:109:2628:13
9:05
-0:31
Half
13.11 mi13:26:222:03:309:256:20
9:17
+0:12
25K
15.53 mi13:51:382:28:469:3525:16
10:25
+1:08
30K
18.64 mi14:26:593:04:079:5335:21
11:23
+0:58
20M
20.00 mi14:39:523:17:009:5112:53
9:29
-1:54
21M
21.00 mi14:49:133:26:219:509:21
9:21
-0:08
35K
21.75 mi14:55:303:32:389:476:17
8:24
-0:57
23M
23.00 mi15:05:593:43:079:4210:29
8:22
-0:02
24M
24.00 mi15:14:153:51:239:388:16
8:16
-0:06
40K
24.85 mi15:21:363:58:449:367:21
8:36
+0:20
25.2M
25.20 mi15:24:474:01:559:363:11
9:14
+0:38
Finish
26.22 mi15:33:264:10:349:348:39
8:29
-0:45

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

8:16 /mi

Average Pace

9:34 /mi

Slowest Pace

11:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

41:02

16% of race

Time at Steady Pace

1:58:46

47% of race

Time at Slower Pace

1:30:46

36% of race

Average Pace: 9:33 /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 mi11:53:0130:099:4230:09
9:42
#22667
10K
6.21 mi12:21:5959:079:3128:58
9:19
#22361
15K
9.32 mi12:51:491:28:579:3329:50
9:36
#22429
20K
12.43 mi13:20:021:57:109:2628:13
9:05
#21887
Half
13.11 mi13:26:222:03:309:256:20
9:17
#21860
25K
15.53 mi13:51:382:28:469:3525:16
10:25
#22119
30K
18.64 mi14:26:593:04:079:5335:21
11:23
#22508
20M
20.00 mi14:39:523:17:009:5112:53
9:29
#22287
21M
21.00 mi14:49:133:26:219:509:21
9:21
#22000
35K
21.75 mi14:55:303:32:389:476:17
8:24
#21838
23M
23.00 mi15:05:593:43:079:4210:29
8:22
#21445
24M
24.00 mi15:14:153:51:239:388:16
8:16
#21179
40K
24.85 mi15:21:363:58:449:367:21
8:36
#20958
25.2M
25.20 mi15:24:474:01:559:363:11
9:14
#20871
Finish
26.22 mi15:33:264:10:349:348:39
8:29
#20718
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi22667134271342722519(Top 85%)13418(Top 88%)13418(Top 599%)
10K6.21 mi3.10 mi22361+30613311+11613311+11621992(Top 83%)13152(Top 87%)13152(Top 587%)
15K9.32 mi3.11 mi22429-6813350-3913350-3922519(Top 85%)13418(Top 88%)13418(Top 599%)
20K12.43 mi3.11 mi21887+54213098+25213098+25220053(Top 75%)12329(Top 81%)12329(Top 550%)
Half13.11 mi0.68 mi21860+2713089+913089+921416(Top 80%)12920(Top 85%)12920(Top 577%)
25K15.53 mi2.42 mi22119-25913203-11413203-11423034(Top 87%)13603(Top 90%)13603(Top 607%)
30K18.64 mi3.11 mi22508-38913357-15413357-15423688(Top 89%)13837(Top 91%)13837(Top 617%)
20M20.00 mi1.36 mi22287+22113263+9413263+9418786(Top 71%)11586(Top 76%)11586(Top 517%)
21M21.00 mi1.00 mi22000+28713125+13813125+13815252(Top 57%)10045(Top 66%)10045(Top 448%)
35K21.75 mi0.75 mi21838+16213041+8413041+8414716(Top 55%)9767(Top 64%)9767(Top 436%)
23M23.00 mi1.25 mi21445+39312852+18912852+18912397(Top 47%)8653(Top 57%)8653(Top 386%)
24M24.00 mi1.00 mi21179+26612711+14112711+14113058(Top 49%)8893(Top 59%)8893(Top 397%)
40K24.85 mi0.85 mi20958+22112604+10712604+10713930(Top 52%)9220(Top 61%)9220(Top 411%)
25.2M25.20 mi0.35 mi20871+8712561+4312561+4313802(Top 52%)9170(Top 60%)9170(Top 409%)
Finish26.22 mi1.02 mi20718+15312487+7412487+7415349(Top 58%)9890(Top 65%)9890(Top 441%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 85%
×21story building
+97ft-345ft

Overall

22519

Males

13418

M40-44

13418

5K→10K

3.1 - 6.2 mi

Top 83%
×5story building
+79ft-138ft

Overall

21992

Males

13152

M40-44

13152

10K→15K

6.2 - 9.3 mi

Top 85%
×3story building
+67ft-78ft

Overall

22519

Males

13418

M40-44

13418

15K→20K

9.3 - 12.4 mi

Top 75%
×5story building
+106ft-86ft

Overall

20053

Males

12329

M40-44

12329

20K→Half

12.4 - 13.1 mi

Top 80%
×2story building
+19ft-37ft

Overall

21416

Males

12920

M40-44

12920

Half→25K

13.1 - 15.5 mi

Top 87%
×4story building
+66ft-88ft

Overall

23034

Males

13603

M40-44

13603

25K→30K

15.5 - 18.6 mi

Top 89%
×9story building
+181ft-148ft

Overall

23688

Males

13837

M40-44

13837

30K→20M

18.6 - 20.0 mi

Top 71%
×5story building
+64ft-50ft

Overall

18786

Males

11586

M40-44

11586

20M→21M

20.0 - 21.0 mi

Top 57%
×8story building
+106ft-24ft

Overall

15252

Males

10045

M40-44

10045

21M→35K

21.0 - 21.8 mi

Top 55%
×7story building
+17ft-86ft

Overall

14716

Males

9767

M40-44

9767

35K→23M

21.8 - 23.0 mi

Top 47%
×5story building
+23ft-63ft

Overall

12397

Males

8653

M40-44

8653

23M→24M

23.0 - 24.0 mi

Top 49%
×6story building
+12ft-82ft

Overall

13058

Males

8893

M40-44

8893

24M→40K

24.0 - 24.9 mi

Top 52%
×1story
+6ft-20ft

Overall

13930

Males

9220

M40-44

9220

40K→25.2M

24.9 - 25.2 mi

Top 52%
×1story
+13ft-16ft

Overall

13802

Males

9170

M40-44

9170

25.2M→Finish

25.2 - 26.2 mi

Top 58%
×2story building
+22ft-21ft

Overall

15349

Males

9890

M40-44

9890

Passing Analysis

Category:
Athletes Passed
3002
Passed By
1053
Net Change
+1949
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22667
5K → 10K420114+306#22667#22361
10K → 15K129197-68#22361#22429
15K → 20K5453+542#22429#21887
20K → Half3912+27#21887#21860
Half → 25K34293-259#21860#22119
25K → 30K41430-389#22119#22508
30K → 20M2221+221#22508#22287
20M → 21M2870+287#22287#22000
21M → 35K1620+162#22000#21838
35K → 23M3930+393#21838#21445
23M → 24M2660+266#21445#21179
24M → 40K2210+221#21179#20958
40K → 25.2M870+87#20958#20871
25.2M → Finish1563+153#20871#20718
TOTALS30021053+1949
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing