Melissa Zerfass

Grayslake

Bib: 2519 F

0:00

0:00

/ mi

Be the first to cheer!

Overall

#0 / 54109

Top 27%

Gender (Female)

#0 / 24561

Top 16%

Division (F35-39)

#0 / 3504

Top 18%

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

7:42/mi

23:54

↑ 52 ft↓ 48 ft

601 ft elev

10K· 6.21 mi

7:46/mi

48:01

↑ 25 ft↓ 31 ft

593 ft elev

15K· 9.32 mi

7:49/mi

1:12:19

↑ 12 ft↓ 13 ft

593 ft elev

20K· 12.43 mi

7:53/mi

1:36:49

↑ 18 ft↓ 17 ft

596 ft elev

Half· 13.11 mi

7:50/mi

1:42:10

↑ 13 ft0.2% grade

603 ft elev

25K· 15.53 mi

7:47/mi

2:01:02

↑ 22 ft↓ 30 ft

597 ft elev

30K· 18.64 mi

7:50/mi

2:25:23

↑ 13 ft↓ 12 ft

597 ft elev

35K· 21.75 mi

9:00/mi

2:53:20

↑ 27 ft↓ 27 ft

597 ft elev

40K· 24.85 mi

10:10/mi

3:24:55

↑ 16 ft↓ 11 ft

602 ft elev

Finish· 26.22 mi

9:17/mi

3:37:35

↑ 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

1:42:107:48 /mi⚡ faster

2nd Half

1:55:258:48 /mi+13.0%

Positive split — 13.0% slower in the second half

AI Race Performance Report

Melissa'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	23:54	7:42	3.11 mi	23:54	7:42	-
10K	48:01	7:44	3.10 mi	24:07	7:46	+0:04
15K	1:12:19	7:46	3.11 mi	24:18	7:49	+0:03
20K	1:36:49	7:47	3.11 mi	24:30	7:53	+0:04
Half(13.11 mi)	1:42:10	7:48	0.68 mi	5:21	7:50	-0:03
25K	2:01:02	7:47	2.42 mi	18:52	7:47	-0:03
30K	2:25:23	7:48	3.11 mi	24:21	7:50	+0:03
35K	2:53:20	7:58	3.11 mi	27:57	9:00	+1:10
40K	3:24:55	8:15	3.10 mi	31:35	10:10	+1:10
Finish(26.22 mi)	3:37:35	8:18	1.37 mi	12:40	9:17	-0:53

Trend:

Faster pace

Steady pace

Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

7:42 /mi

Average Pace

8:18 /mi

Slowest Pace

10:10 /mi

Loading chart...

Fastest

Middle

Slowest

Average

Segments

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:25:23

67% of race

Time at Slower Pace

1:12:12

33% of race

Average Pace: 8:18 /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	F35-39	Seg. Overall	Seg. Females	Seg. F35-39
5K	3.11 mi	11943	2540	438	14270	3327	580
10K	3.10 mi	12201-258	2651-111	461-23	12617	2809	490
15K	3.11 mi	12823-622	2859-208	495-34	14270	3327	580
20K	3.11 mi	12978-155	2910-51	507-12	13628	3086	529
Half(13.11 mi)	0.68 mi	12901+77	2879+31	504+3	12166	2631	437
25K	2.42 mi	12715+186	2815+64	487+17	11988	2602	438
30K	3.11 mi	12232+483	2684+131	458+29	10784	2302	382
35K	3.11 mi	13109-877	3041-357	524-66	18619	5647	890
40K	3.10 mi	14562-1453	3695-654	628-104	23417	8473	1284
Finish(26.22 mi)	1.37 mi	14776-214	3832-137	647-19	20704	7393	1134

7393

Passing Analysis

No position changes recorded for this athlete.

More below

See the rest of Melissa'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