Jackie Cofsky

Chicago

Bib: 41056 F

0:00

0:00

/ mi

Be the first to cheer!

Overall

#0 / 54109

Top 47%

Gender (Female)

#0 / 24561

Top 34%

Division (F25-29)

#0 / 5362

Top 37%

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

9:03/mi

28:06

↑ 52 ft↓ 48 ft

601 ft elev

10K· 6.21 mi

8:57/mi

55:54

↑ 25 ft↓ 31 ft

593 ft elev

15K· 9.32 mi

8:35/mi

1:22:33

↑ 12 ft↓ 13 ft

593 ft elev

20K· 12.43 mi

8:45/mi

1:49:43

↑ 18 ft↓ 17 ft

596 ft elev

Half· 13.11 mi

9:01/mi

1:55:52

↑ 13 ft0.2% grade

603 ft elev

25K· 15.53 mi

9:12/mi

2:18:11

↑ 22 ft↓ 30 ft

597 ft elev

30K· 18.64 mi

10:20/mi

2:50:17

↑ 13 ft↓ 12 ft

597 ft elev

35K· 21.75 mi

10:20/mi

3:22:22

↑ 27 ft↓ 27 ft

597 ft elev

40K· 24.85 mi

10:20/mi

3:54:27

↑ 16 ft↓ 11 ft

602 ft elev

Finish· 26.22 mi

9:31/mi

4:07:26

↑ 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

1:55:528:50 /mi⚡ faster

2nd Half

2:11:3410:02 /mi+13.6%

Positive split — 13.6% slower in the second half

AI Race Performance Report

Jackie'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	28:06	9:03	3.11 mi	28:06	9:03	-
10K	55:54	9:00	3.10 mi	27:48	8:57	-0:06
15K	1:22:33	8:51	3.11 mi	26:39	8:35	-0:22
20K	1:49:43	8:50	3.11 mi	27:10	8:45	+0:10
Half(13.11 mi)	1:55:52	8:50	0.68 mi	6:09	9:01	+0:16
25K	2:18:11	8:54	2.42 mi	22:19	9:12	+0:11
30K	2:50:17	9:08	3.11 mi	32:06	10:20	+1:08
35K	3:22:22	9:18	3.11 mi	32:05	10:20	0:00
40K	3:54:27	9:26	3.10 mi	32:05	10:20	0:00
Finish(26.22 mi)	4:07:26	9:27	1.37 mi	12:59	9:31	-0:49

Trend:

Faster pace

Steady pace

Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

8:35 /mi

Average Pace

9:27 /mi

Slowest Pace

10:20 /mi

Loading chart...

Fastest

Middle

Slowest

Average

Segments

Time at Faster Pace

53:49

22% of race

Time at Steady Pace

1:37:21

39% of race

Time at Slower Pace

1:36:16

39% of race

Average Pace: 9:26 /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	F25-29	Seg. Overall	Seg. Females	Seg. F25-29
5K	3.11 mi	26091	8242	1829	22392	6463	1468
10K	3.10 mi	25333+758	7854+388	1753+76	24777	7596	1711
15K	3.11 mi	24193+1140	7296+558	1637+116	22392	6463	1468
20K	3.11 mi	23713+480	7087+209	1604+33	22463	6512	1508
Half(13.11 mi)	0.68 mi	23654+59	7081+6	1608-4	23671	7158	1676
25K	2.42 mi	23938-284	7234-153	1634-26	26119	8343	1935
30K	3.11 mi	25762-1824	8146-912	1863-229	31127	11213	2598
35K	3.11 mi	26237-475	8529-383	1956-93	28216	10200	2410
40K	3.10 mi	25727+510	8503+26	1964-8	24455	8968	2099
Finish(26.22 mi)	1.37 mi	25449+278	8455+48	1964	22622	8324	2050

8324

Passing Analysis

No position changes recorded for this athlete.

More below

See the rest of Jackie'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