Margaret O'Brien

Chicago

Bib: 42884 F

0:00

0:00

/ mi

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Overall

#0 / 54109

Top 44%

Gender (Female)

#0 / 24561

Top 31%

Division (F30-34)

#0 / 4161

Top 35%

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

9:09/mi

28:27

↑ 52 ft↓ 48 ft

601 ft elev

10K· 6.21 mi

9:00/mi

56:24

↑ 25 ft↓ 31 ft

593 ft elev

15K· 9.32 mi

8:52/mi

1:23:56

↑ 12 ft↓ 13 ft

593 ft elev

20K· 12.43 mi

8:55/mi

1:51:38

↑ 18 ft↓ 17 ft

596 ft elev

Half· 13.11 mi

9:02/mi

1:57:48

↑ 13 ft0.2% grade

603 ft elev

25K· 15.53 mi

8:44/mi

2:18:59

↑ 22 ft↓ 30 ft

597 ft elev

30K· 18.64 mi

8:53/mi

2:46:34

↑ 13 ft↓ 12 ft

597 ft elev

35K· 21.75 mi

9:41/mi

3:16:39

↑ 27 ft↓ 27 ft

597 ft elev

40K· 24.85 mi

10:12/mi

3:48:20

↑ 16 ft↓ 11 ft

602 ft elev

Finish· 26.22 mi

9:41/mi

4:01:33

↑ 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

1:57:488:59 /mi⚡ faster

2nd Half

2:03:459:26 /mi+5.1%

Positive split — 5.1% slower in the second half

AI Race Performance Report

Margaret's race, broken down like a coach

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Checkpoint Splits

Checkpoint	Time	Avg Pace	Segment Length	Segment Time	Segment Pace	Diff
5K	28:27	9:09	3.11 mi	28:27	9:09	-
10K	56:24	9:05	3.10 mi	27:57	9:00	-0:09
15K	1:23:56	9:00	3.11 mi	27:32	8:52	-0:08
20K	1:51:38	8:59	3.11 mi	27:42	8:55	+0:03
Half(13.11 mi)	1:57:48	8:59	0.68 mi	6:10	9:02	+0:07
25K	2:18:59	8:57	2.42 mi	21:11	8:44	-0:18
30K	2:46:34	8:56	3.11 mi	27:35	8:53	+0:09
35K	3:16:39	9:03	3.11 mi	30:05	9:41	+0:48
40K	3:48:20	9:11	3.10 mi	31:41	10:12	+0:31
Finish(26.22 mi)	4:01:33	9:13	1.37 mi	13:13	9:41	-0:31

Trend:

Faster pace

Steady pace

Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

8:44 /mi

Average Pace

9:13 /mi

Slowest Pace

10:12 /mi

Loading chart...

Fastest

Middle

Slowest

Average

Segments

Time at Faster Pace

2:46:34

69% of race

Time at Steady Pace

1:14:59

31% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:13 /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	Females	F30-34	Seg. Overall	Seg. Females	Seg. F30-34
5K	3.11 mi	27478	8851	1625	25808	7961	1485
10K	3.10 mi	26305+1173	8307+544	1533+92	25384	7878	1469
15K	3.11 mi	26050+255	8151+156	1513+20	25808	7961	1485
20K	3.11 mi	25547+503	7915+236	1485+28	24408	7377	1406
Half(13.11 mi)	0.68 mi	25398+149	7851+64	1475+10	23955	7288	1378
25K	2.42 mi	24599+799	7529+322	1423+52	21130	6113	1185
30K	3.11 mi	23496+1103	7128+401	1356+67	19937	5844	1145
35K	3.11 mi	23504-8	7286-158	1387-31	24034	8135	1523
40K	3.10 mi	23644-140	7543-257	1424-37	23633	8577	1618
Finish(26.22 mi)	1.37 mi	23674-30	7623-80	1448-24	23994	8976	1707

8976

Passing Analysis

No position changes recorded for this athlete.

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All Results

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Public Race Data

Enhanced athlete results built from publicly available data.

Race managed by

Chicago Event Management

Race timed by

Mika Timing