Boston Marathon logo
BOSTON MARATHON 2023

Bobby Earle O'Brien

Bib: 13968•M

MA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 35%
Gender (Male)
#0 / 15176
Top 50%
Masters (Masters Men)
#0 / 9891
Top 38%
Division (M55-59)
#0 / 1422
Top 20%
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
7:28/mi
23:13
↑ 97↓ 3451.5%
10K· 6.21 mi
7:27/mi
46:23
↑ 79↓ 1380.4%
15K· 9.32 mi
7:30/mi
1:09:42
↑ 67↓ 78
20K· 12.43 mi
7:31/mi
1:33:02
↑ 106↓ 860.1%
Half· 13.11 mi
7:23/mi
1:38:04
↑ 19↓ 370.5%
25K· 15.53 mi
7:35/mi
1:56:27
↑ 66↓ 880.2%
30K· 18.64 mi
7:43/mi
2:20:27
↑ 181↓ 1480.2%
20M
7:49/mi
2:31:05
↑ 64↓ 500.2%
21M
8:38/mi
2:39:43
↑ 106↓ 241.6%
35K· 21.75 mi
7:37/mi
2:45:25
↑ 17↓ 861.7%
23M
7:49/mi
2:55:12
↑ 23↓ 630.6%
24M
7:46/mi
3:02:58
↓ 821.3%
40K· 24.85 mi
7:50/mi
3:09:40
↓ 200.3%
25.2M
8:30/mi
3:12:36
↑ 13↓ 160.2%
Finish· 26.22 mi
7:53/mi
3:20:38
↑ 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
Time1:38:04
Pace7:29 /mi
2nd Half
Distance13.11 mi
Time1:42:34
Pace7:49 /mi
📊Positive Split: 4.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:3423:137:2823:13
7:28
-
10K
6.21 mi11:14:4446:237:2823:10
7:27
-0:01
15K
9.32 mi11:38:031:09:427:2923:19
7:30
+0:03
20K
12.43 mi12:01:231:33:027:2923:20
7:31
+0:01
Half
13.11 mi12:06:251:38:047:295:02
7:23
-0:08
25K
15.53 mi12:24:481:56:277:3018:23
7:35
+0:12
30K
18.64 mi12:48:482:20:277:3224:00
7:43
+0:08
20M
20.00 mi12:59:262:31:057:3310:38
7:49
+0:06
21M
21.00 mi13:08:042:39:437:368:38
8:38
+0:49
35K
21.75 mi13:13:462:45:257:365:42
7:37
-1:01
23M
23.00 mi13:23:332:55:127:379:47
7:49
+0:12
24M
24.00 mi13:31:193:02:587:377:46
7:46
-0:03
40K
24.85 mi13:38:013:09:407:386:42
7:50
+0:04
25.2M
25.20 mi13:40:573:12:367:392:56
8:30
+0:40
Finish
26.22 mi13:48:593:20:387:398:02
7:53
-0:37

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

7:23 /mi

Average Pace

7:39 /mi

Slowest Pace

8:38 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:09:04

94% of race

Time at Steady Pace

11:34

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:39 /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 mi10:51:3423:137:2823:13
7:28
#9386
10K
6.21 mi11:14:4446:237:2823:10
7:27
#9705
15K
9.32 mi11:38:031:09:427:2923:19
7:30
#9844
20K
12.43 mi12:01:231:33:027:2923:20
7:31
#9696
Half
13.11 mi12:06:251:38:047:295:02
7:23
#9666
25K
15.53 mi12:24:481:56:277:3018:23
7:35
#9616
30K
18.64 mi12:48:482:20:277:3224:00
7:43
#9436
20M
20.00 mi12:59:262:31:057:3310:38
7:49
#9396
21M
21.00 mi13:08:042:39:437:368:38
8:38
#9475
35K
21.75 mi13:13:462:45:257:365:42
7:37
#9459
23M
23.00 mi13:23:332:55:127:379:47
7:49
#9349
24M
24.00 mi13:31:193:02:587:377:46
7:46
#9324
40K
24.85 mi13:38:013:09:407:386:42
7:50
#9297
25.2M
25.20 mi13:40:573:12:367:392:56
8:30
#9300
Finish
26.22 mi13:48:593:20:387:398:02
7:53
#9359
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi93867803780310203(Top 38%)8251(Top 54%)8251(Top 580%)
10K6.21 mi3.10 mi9705-3197986-1837986-18310110(Top 38%)8226(Top 54%)8226(Top 578%)
15K9.32 mi3.11 mi9844-1398074-888074-8810203(Top 38%)8251(Top 54%)8251(Top 580%)
20K12.43 mi3.11 mi9696+1487981+937981+939381(Top 35%)7733(Top 51%)7733(Top 544%)
Half13.11 mi0.68 mi9666+307962+197962+199202(Top 35%)7637(Top 50%)7637(Top 537%)
25K15.53 mi2.42 mi9616+507908+547908+549394(Top 35%)7660(Top 50%)7660(Top 539%)
30K18.64 mi3.11 mi9436+1807759+1497759+1498826(Top 33%)7175(Top 47%)7175(Top 505%)
20M20.00 mi1.36 mi9396+407714+457714+459048(Top 34%)7223(Top 48%)7223(Top 508%)
21M21.00 mi1.00 mi9475-797741-277741-2711226(Top 42%)8216(Top 54%)8216(Top 578%)
35K21.75 mi0.75 mi9459+167714+277714+279376(Top 35%)7281(Top 48%)7281(Top 512%)
23M23.00 mi1.25 mi9349+1107626+887626+888496(Top 32%)6697(Top 44%)6697(Top 471%)
24M24.00 mi1.00 mi9324+257590+367590+369514(Top 36%)7162(Top 47%)7162(Top 504%)
40K24.85 mi0.85 mi9297+277540+507540+508892(Top 33%)6754(Top 45%)6754(Top 475%)
25.2M25.20 mi0.35 mi9300-37532+87532+89494(Top 36%)7020(Top 46%)7020(Top 494%)
Finish26.22 mi1.02 mi9359-597547-157547-1511256(Top 42%)7913(Top 52%)7913(Top 556%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 38%
×21story building
+97ft-345ft

Overall

10203

Males

8251

M55-59

8251

5K→10K

3.1 - 6.2 mi

Top 38%
×5story building
+79ft-138ft

Overall

10110

Males

8226

M55-59

8226

10K→15K

6.2 - 9.3 mi

Top 38%
×3story building
+67ft-78ft

Overall

10203

Males

8251

M55-59

8251

15K→20K

9.3 - 12.4 mi

Top 35%
×5story building
+106ft-86ft

Overall

9381

Males

7733

M55-59

7733

20K→Half

12.4 - 13.1 mi

Top 35%
×2story building
+19ft-37ft

Overall

9202

Males

7637

M55-59

7637

Half→25K

13.1 - 15.5 mi

Top 35%
×4story building
+66ft-88ft

Overall

9394

Males

7660

M55-59

7660

25K→30K

15.5 - 18.6 mi

Top 33%
×9story building
+181ft-148ft

Overall

8826

Males

7175

M55-59

7175

30K→20M

18.6 - 20.0 mi

Top 34%
×5story building
+64ft-50ft

Overall

9048

Males

7223

M55-59

7223

20M→21M

20.0 - 21.0 mi

Top 42%
×8story building
+106ft-24ft

Overall

11226

Males

8216

M55-59

8216

21M→35K

21.0 - 21.8 mi

Top 35%
×7story building
+17ft-86ft

Overall

9376

Males

7281

M55-59

7281

35K→23M

21.8 - 23.0 mi

Top 32%
×5story building
+23ft-63ft

Overall

8496

Males

6697

M55-59

6697

23M→24M

23.0 - 24.0 mi

Top 36%
×6story building
+12ft-82ft

Overall

9514

Males

7162

M55-59

7162

24M→40K

24.0 - 24.9 mi

Top 33%
×1story
+6ft-20ft

Overall

8892

Males

6754

M55-59

6754

40K→25.2M

24.9 - 25.2 mi

Top 36%
×1story
+13ft-16ft

Overall

9494

Males

7020

M55-59

7020

25.2M→Finish

25.2 - 26.2 mi

Top 42%
×2story building
+22ft-21ft

Overall

11256

Males

7913

M55-59

7913

Passing Analysis

Category:
Athletes Passed
1537*
Passed By
1510
Net Change
+27
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9386
5K → 10K176495-319#9386#9705
10K → 15K118257-139#9705#9844
15K → 20K225*77+148#9844#9696
20K → Half4010+30#9696#9666
Half → 25K14797+50#9666#9616
25K → 30K256*76+180#9616#9436
30K → 20M10161+40#9436#9396
20M → 21M63142-79#9396#9475
21M → 35K5943+16#9475#9459
35K → 23M13525+110#9459#9349
23M → 24M7752+25#9349#9324
24M → 40K8558+27#9324#9297
40K → 25.2M2326-3#9297#9300
25.2M → Finish3291-59#9300#9359
TOTALS1537*1510+27

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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