## 146Re: Hardrock is only 90 miles!

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• May 10, 2000
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Matt:

Your point on the methodology used to obtain the distances for the
Hardrock is well taken. It is done very deliberately for the
following
reason.

Over the years, Charlie and I have measured between 150 and 200 miles
of trail in Colorado and New Mexico by pushing a bike wheel fitted
with a Jones counter. In 1992 and 93 Rick Trujillo measured about
half of the Hardrock course using this wheel.

All the courses were then laid out and measured on the map using the
Pythagorean theorem as you suggest. Correlation with the in field
measurements was poor and systematically biased low. We have assumed
the in field measurements are the more accurate numbers. The best fit
of the map to field turned out to be the the vertical distances are
added directly to horizontal distances to obtain the totals.

John Cappis

--- In hr100@egroups.com, "Matt Mahoney" <matmahoney@y...> wrote:
> I just got my Hardrock entry booklet today. Very nicely done, But
on page 2
> of the course description, item 6, it says:
>
> "All mileage used were obtained by map measurement with on the
ground wheel
> measurement verifications for over half the course. To correct for
vertical
> changes on the map measurements, the vertical distances are added
directly
> to horizontal distances to obtain the totals"
>
> If we subtract the vertical distance (66,000 ft. = 12.5 miles) from
the
> total distance (101.7 miles), we obtain a horizontal component of
89.2
> miles. Then applying Pythagoras' theorem, which is the correct
method of
> combining horizontal and vertical distances (assuming a constant
> have
>
> sqrt(89.2^2 + 12.5^2) = 90.1 miles.
>
> So this course is really not has hard as everyone says it is :-)
>
> Also, a couple of minor errata:
>
> 1. Carl Yates is listed as -27 years old (a lingering Y2K bug
maybe,
or did
> we make an exception to the minimum age requirements?)
>
> 2. At the absolute bottom of the all time finishers results (sorted
by
> time), Fred Vance and I (with * by our names) are listed as
finishing
> unofficially in 51:08 in '98. Our actual time was 51:38:34 (a
blistering
> 34:23/mile pace, and I had the blisters to prove it).
>
> -- Matt Mahoney, matmahoney@y...
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