Brendan O'Brien

Chicago

Bib: 17485 M

0:00

0:00

/ mi

Be the first to cheer!

Overall

#0 / 54109

Top 21%

Gender (Male)

#0 / 29548

Top 29%

Division (M25-29)

#0 / 4122

Top 33%

Race Day Weather

54°/44°F

few clouds

Race Timeline

Ribbon color based on

FasterSteadySlower· vs. your average pace

Start

0:00

Race begins

600 ft elev

5K· 3.11 mi

7:36/mi

23:38

↑ 52 ft↓ 48 ft

601 ft elev

10K· 6.21 mi

7:45/mi

47:43

↑ 25 ft↓ 31 ft

593 ft elev

15K· 9.32 mi

7:39/mi

1:11:28

↑ 12 ft↓ 13 ft

593 ft elev

20K· 12.43 mi

7:49/mi

1:35:46

↑ 18 ft↓ 17 ft

596 ft elev

Half· 13.11 mi

8:02/mi

1:41:15

↑ 13 ft0.2% grade

603 ft elev

25K· 15.53 mi

8:05/mi

2:00:52

↑ 22 ft↓ 30 ft

597 ft elev

30K· 18.64 mi

8:07/mi

2:26:06

↑ 13 ft↓ 12 ft

597 ft elev

35K· 21.75 mi

8:06/mi

2:51:15

↑ 27 ft↓ 27 ft

597 ft elev

40K· 24.85 mi

8:04/mi

3:16:19

↑ 16 ft↓ 11 ft

602 ft elev

Finish· 26.22 mi

7:51/mi

3:27:01

↑ 23 ft↓ 20 ft

606 ft elev

Course Elevation

227ft

Total climb

32ft

Range

589 to 621 ft

221ft

Total descent

About the height of a three-story building

The Course

Half Splits

1st Half· via Half

1:41:157:43 /mi⚡ faster

2nd Half

1:45:468:04 /mi+4.5%

Positive split — 4.5% slower in the second half

AI Race Performance Report

Brendan's race, broken down like a coach

The full Race Story, performance analysis, segment & passing breakdowns, and where the race turned. Free to unlock — for anyone.

Free account · no payment

Checkpoint Splits

Checkpoint	Time	Avg Pace	Segment Length	Segment Time	Segment Pace	Diff
5K	23:38	7:36	3.11 mi	23:38	7:36	-
10K	47:43	7:41	3.10 mi	24:05	7:45	+0:09
15K	1:11:28	7:40	3.11 mi	23:45	7:39	-0:06
20K	1:35:46	7:42	3.11 mi	24:18	7:49	+0:10
Half(13.11 mi)	1:41:15	7:43	0.68 mi	5:29	8:02	+0:13
25K	2:00:52	7:47	2.42 mi	19:37	8:05	+0:03
30K	2:26:06	7:50	3.11 mi	25:14	8:07	+0:02
35K	2:51:15	7:52	3.11 mi	25:09	8:06	-0:01
40K	3:16:19	7:54	3.10 mi	25:04	8:04	-0:02
Finish(26.22 mi)	3:27:01	7:54	1.37 mi	10:42	7:51	-0:13

Trend:

Faster pace

Steady pace

Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

7:36 /mi

Average Pace

7:54 /mi

Slowest Pace

8:07 /mi

Loading chart...

Fastest

Middle

Slowest

Average

Segments

Time at Faster Pace

1:46:28

51% of race

Time at Steady Pace

1:40:33

49% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:54 /mi

Loading chart...

Faster pace (< avg)

Steady pace (≈ avg)

Slower pace (> avg)

Heatmap

0mi6.6mi13.1mi19.7mi26.2mi

Pace:

Faster

Steady

Slower

Checkpoint and Segment Rankings

Checkpoint	Seg. Dist	Overall	Males	M25-29	Seg. Overall	Seg. Males	Seg. M25-29
5K	3.11 mi	11182	8920	1372	12369	9720	1498
10K	3.10 mi	11756-574	9289-369	1433-61	12490	9734	1496
15K	3.11 mi	11944-188	9405-116	1451-18	12369	9720	1498
20K	3.11 mi	12144-200	9550-145	1470-19	12897	10064	1579
Half(13.11 mi)	0.68 mi	12205-61	9588-38	1470	13877	10647	1667
25K	2.42 mi	12586-381	9821-233	1507-37	14971	11313	1763
30K	3.11 mi	12589-3	9780+41	1502+5	13285	10120	1574
35K	3.11 mi	12206+383	9475+305	1475+27	11146	8535	1357
40K	3.10 mi	11459+747	8879+596	1380+95	8789	6729	1057
Finish(26.22 mi)	1.37 mi	11236+223	8697+182	1354+26	8891	6688	1126

6688

Passing Analysis

No position changes recorded for this athlete.

More below

See the rest of Brendan's race

Checkpoint splits, rankings, passing analysis and qualifying. One free sign-in reveals them here — and on every race you look up.

All Results

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

Enhanced athlete results built from publicly available data.

Race managed by

Chicago Event Management

Race timed by

Mika Timing