Boston Marathon logo
BOSTON MARATHON 2023

Austin O'Brien

Bib: 67•M

IA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 2%
Gender (Male)
#0 / 15176
Top 4%
Division (M18-39)
#0 / 5285
Top 9%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
17:26
Rank: #194
Start → 5K
17:26 | 5:37/mi
10K· 6.21 mi
35:01
Rank: #222 (-28)
5K → 10K
17:35 | 5:40/mi
15K· 9.32 mi
53:06
Rank: #275 (-53)
10K → 15K
18:05 | 5:49/mi
20K· 12.43 mi
1:11:42
Rank: #324 (-49)
15K → 20K
18:36 | 5:59/mi
Half· 13.11 mi
1:15:45
Rank: #333 (-9)
20K → Half
4:03 | 5:56/mi
25K· 15.53 mi
1:30:38
Rank: #385 (-52)
Half → 25K
14:53 | 6:08/mi
30K· 18.64 mi
1:50:19
Rank: #457 (-72)
25K → 30K
19:41 | 6:20/mi
20M
1:58:57
Rank: #474 (-17)
30K → 20M
8:38 | 6:21/mi
21M
2:05:41
Rank: #479 (-5)
20M → 21M
6:44 | 6:44/mi
35K· 21.75 mi
2:10:17
Rank: #494 (-15)
21M → 35K
4:36 | 6:09/mi
23M
2:18:20
Rank: #507 (-13)
35K → 23M
8:03 | 6:26/mi
24M
2:24:46
Rank: #534 (-27)
23M → 24M
6:26 | 6:26/mi
40K· 24.85 mi
2:30:29
Rank: #562 (-28)
24M → 40K
5:43 | 6:41/mi
25.2M
2:32:56
Rank: #576 (-14)
40K → 25.2M
2:27 | 7:06/mi
Finish· 26.22 mi
2:39:39
Rank: #612 (-36)
25.2M → Finish
6:43 | 6:35/mi

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
Time1:15:45
Pace5:47 /mi
2nd Half
Distance13.11 mi
Time1:23:54
Pace6:24 /mi
📊Positive Split: 10.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi09:54:2717:265:3717:26
5:37
-
10K
6.21 mi10:12:0235:015:3817:35
5:40
+0:03
15K
9.32 mi10:30:0753:065:4218:05
5:49
+0:09
20K
12.43 mi10:48:431:11:425:4618:36
5:59
+0:10
Half
13.11 mi10:52:461:15:455:474:03
5:56
-0:03
25K
15.53 mi11:07:391:30:385:5014:53
6:08
+0:12
30K
18.64 mi11:27:201:50:195:5519:41
6:20
+0:12
20M
20.00 mi11:35:581:58:575:578:38
6:21
+0:01
21M
21.00 mi11:42:422:05:415:596:44
6:44
+0:23
35K
21.75 mi11:47:182:10:175:594:36
6:09
-0:35
23M
23.00 mi11:55:212:18:206:018:03
6:26
+0:17
24M
24.00 mi12:01:472:24:466:026:26
6:26
0:00
40K
24.85 mi12:07:302:30:296:035:43
6:41
+0:15
25.2M
25.20 mi12:09:572:32:566:042:27
7:06
+0:25
Finish
26.22 mi12:16:402:39:396:066:43
6:35
-0:31

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

5:37 /mi

Average Pace

6:06 /mi

Slowest Pace

7:06 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:15:45

47% of race

Time at Steady Pace

1:02:17

39% of race

Time at Slower Pace

21:37

14% of race

Average Pace: 6:05 /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 mi09:54:2717:265:3717:26
5:37
#194
10K
6.21 mi10:12:0235:015:3817:35
5:40
#222
15K
9.32 mi10:30:0753:065:4218:05
5:49
#275
20K
12.43 mi10:48:431:11:425:4618:36
5:59
#324
Half
13.11 mi10:52:461:15:455:474:03
5:56
#333
25K
15.53 mi11:07:391:30:385:5014:53
6:08
#385
30K
18.64 mi11:27:201:50:195:5519:41
6:20
#457
20M
20.00 mi11:35:581:58:575:578:38
6:21
#474
21M
21.00 mi11:42:422:05:415:596:44
6:44
#479
35K
21.75 mi11:47:182:10:175:594:36
6:09
#494
23M
23.00 mi11:55:212:18:206:018:03
6:26
#507
24M
24.00 mi12:01:472:24:466:026:26
6:26
#534
40K
24.85 mi12:07:302:30:296:035:43
6:41
#562
25.2M
25.20 mi12:09:572:32:566:042:27
7:06
#576
Finish
26.22 mi12:16:402:39:396:066:43
6:35
#612
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi194194194395(Top 1%)361(Top 2%)361(Top 7%)
10K6.21 mi3.10 mi222-28195-1195-1258(Top 1.0%)228(Top 2%)228(Top 4%)
15K9.32 mi3.11 mi275-53247-52247-52395(Top 1%)361(Top 2%)361(Top 7%)
20K12.43 mi3.11 mi324-49292-45292-45543(Top 2%)503(Top 3%)503(Top 10%)
Half13.11 mi0.68 mi333-9301-9301-9615(Top 2%)577(Top 4%)577(Top 11%)
25K15.53 mi2.42 mi385-52353-52353-52831(Top 3%)787(Top 5%)787(Top 15%)
30K18.64 mi3.11 mi457-72420-67420-671005(Top 4%)954(Top 6%)954(Top 18%)
20M20.00 mi1.36 mi474-17439-19439-19993(Top 4%)949(Top 6%)949(Top 18%)
21M21.00 mi1.00 mi479-5443-4443-41177(Top 4%)1119(Top 7%)1119(Top 21%)
35K21.75 mi0.75 mi494-15457-14457-141049(Top 4%)997(Top 7%)997(Top 19%)
23M23.00 mi1.25 mi507-13470-13470-131173(Top 4%)1107(Top 7%)1107(Top 21%)
24M24.00 mi1.00 mi534-27496-26496-261784(Top 7%)1680(Top 11%)1680(Top 32%)
40K24.85 mi0.85 mi562-28523-27523-272241(Top 8%)2079(Top 14%)2079(Top 39%)
25.2M25.20 mi0.35 mi576-14537-14537-142045(Top 8%)1901(Top 13%)1901(Top 36%)
Finish26.22 mi1.02 mi612-36572-35572-352900(Top 11%)2625(Top 17%)2625(Top 50%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 1%
×21stories
+97ft-345ft

Overall

395

Males

361

M18-39

361

5K→10K

3.1 - 6.2 mi

Top 1.0%
×5stories
+79ft-138ft

Overall

258

Males

228

M18-39

228

10K→15K

6.2 - 9.3 mi

Top 1%
×3stories
+67ft-78ft

Overall

395

Males

361

M18-39

361

15K→20K

9.3 - 12.4 mi

Top 2%
×5stories
+106ft-86ft

Overall

543

Males

503

M18-39

503

20K→Half

12.4 - 13.1 mi

Top 2%
×2stories
+19ft-37ft

Overall

615

Males

577

M18-39

577

Half→25K

13.1 - 15.5 mi

Top 3%
×4stories
+66ft-88ft

Overall

831

Males

787

M18-39

787

25K→30K

15.5 - 18.6 mi

Top 4%
×9stories
+181ft-148ft

Overall

1005

Males

954

M18-39

954

30K→20M

18.6 - 20.0 mi

Top 4%
×5stories
+64ft-50ft

Overall

993

Males

949

M18-39

949

20M→21M

20.0 - 21.0 mi

Top 4%
×8stories
+106ft-24ft

Overall

1177

Males

1119

M18-39

1119

21M→35K

21.0 - 21.8 mi

Top 4%
×7stories
+17ft-86ft

Overall

1049

Males

997

M18-39

997

35K→23M

21.8 - 23.0 mi

Top 4%
×5stories
+23ft-63ft

Overall

1173

Males

1107

M18-39

1107

23M→24M

23.0 - 24.0 mi

Top 7%
×6stories
+12ft-82ft

Overall

1784

Males

1680

M18-39

1680

24M→40K

24.0 - 24.9 mi

Top 8%
×1story
+6ft-20ft

Overall

2241

Males

2079

M18-39

2079

40K→25.2M

24.9 - 25.2 mi

Top 8%
×1story
+13ft-16ft

Overall

2045

Males

1901

M18-39

1901

25.2M→Finish

25.2 - 26.2 mi

Top 11%
×2stories
+22ft-21ft

Overall

2900

Males

2625

M18-39

2625

Passing Analysis

Category:
Athletes Passed
53
Passed By
471
Net Change
-418
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#194
5K → 10K1341-28#194#222
10K → 15K053-53#222#275
15K → 20K150-49#275#324
20K → Half09-9#324#333
Half → 25K456-52#333#385
25K → 30K577-72#385#457
30K → 20M724-17#457#474
20M → 21M38-5#474#479
21M → 35K217-15#479#494
35K → 23M821-13#494#507
23M → 24M532-27#507#534
24M → 40K129-28#534#562
40K → 25.2M317-14#562#576
25.2M → Finish137-36#576#612
TOTALS53471-418
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing