John Andrefsky

Chicago

Bib: 24135 M

0:00

0:00

/ mi

Be the first to cheer!

Overall

#0 / 54109

Top 38%

Gender (Male)

#0 / 29548

Top 49%

Division (M30-34)

#0 / 4787

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

8:11/mi

25:24

↑ 52 ft↓ 48 ft

601 ft elev

10K· 6.21 mi

9:10/mi

53:54

↑ 25 ft↓ 31 ft

593 ft elev

15K· 9.32 mi

8:33/mi

1:20:29

↑ 12 ft↓ 13 ft

593 ft elev

20K· 12.43 mi

8:38/mi

1:47:17

↑ 18 ft↓ 17 ft

596 ft elev

Half· 13.11 mi

8:51/mi

1:53:19

↑ 13 ft0.2% grade

603 ft elev

25K· 15.53 mi

9:29/mi

2:16:18

↑ 22 ft↓ 30 ft

597 ft elev

30K· 18.64 mi

9:13/mi

2:44:57

↑ 13 ft↓ 12 ft

597 ft elev

35K· 21.75 mi

8:47/mi

3:12:13

↑ 27 ft↓ 27 ft

597 ft elev

40K· 24.85 mi

9:46/mi

3:42:33

↑ 16 ft↓ 11 ft

602 ft elev

Finish· 26.22 mi

8:33/mi

3:54:13

↑ 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

1:53:198:39 /mi⚡ faster

2nd Half

2:00:549:13 /mi+6.7%

Positive split — 6.7% slower in the second half

AI Race Performance Report

John'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	25:24	8:11	3.11 mi	25:24	8:11	-
10K	53:54	8:40	3.10 mi	28:30	9:10	+0:59
15K	1:20:29	8:38	3.11 mi	26:35	8:33	-0:37
20K	1:47:17	8:38	3.11 mi	26:48	8:38	+0:05
Half(13.11 mi)	1:53:19	8:39	0.68 mi	6:02	8:51	+0:13
25K	2:16:18	8:46	2.42 mi	22:59	9:29	+0:38
30K	2:44:57	8:51	3.11 mi	28:39	9:13	-0:16
35K	3:12:13	8:50	3.11 mi	27:16	8:47	-0:26
40K	3:42:33	8:57	3.10 mi	30:20	9:46	+0:59
Finish(26.22 mi)	3:54:13	8:56	1.37 mi	11:40	8:33	-1:13

Trend:

Faster pace

Steady pace

Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

8:11 /mi

Average Pace

8:56 /mi

Slowest Pace

9:46 /mi

Loading chart...

Fastest

Middle

Slowest

Average

Segments

Time at Faster Pace

2:03:45

53% of race

Time at Steady Pace

1:20:08

34% of race

Time at Slower Pace

30:20

13% of race

Average Pace: 8:56 /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	M30-34	Seg. Overall	Seg. Males	Seg. M30-34
5K	3.11 mi	16725	12420	2214	22126	15760	2754
10K	3.10 mi	21578-4853	15347-2927	2671-457	27513	18651	3220
15K	3.11 mi	21665-87	15407-60	2681-10	22126	15760	2754
20K	3.11 mi	21515+150	15333+74	2672+9	21107	15130	2665
Half(13.11 mi)	0.68 mi	21495+20	15315+18	2674-2	21632	15381	2740
25K	2.42 mi	22615-1120	15965-650	2795-121	28294	18919	3311
30K	3.11 mi	22485+130	15809+156	2782+13	23183	15883	2796
35K	3.11 mi	21377+1108	15037+772	2645+137	16739	11895	2142
40K	3.10 mi	21227+150	14754+283	2602+43	20928	13632	2408
Finish(26.22 mi)	1.37 mi	20723+504	14418+336	2544+58	14320	9879	1789

9879

Passing Analysis

No position changes recorded for this athlete.

More below

See the rest of John'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