Orthocenter Rock Mystery Cache
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Difficulty:
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Terrain:
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Size: 
(regular)
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No, the cache is not in the middle of a parking lot, although this lot may be a good starting point for your quest. It is also a vertex of a certain triangle. Find the two others, and go for the orthocenter!
We wanted to put a cache in the centroid of a Secret Triangle at first, but it turns out that this idea has been used in a California cache already. Besides, the math behind the centroid is kind of trivial ( a very similar math has been also utilizied in this fun cache).
So - let it be an orthocenter instead! You've got one vertex already. For the remaining two, go to Return of the Dark Star, FerguFalls, Awesome Analyst Ape, or Don't dive, it's a typo cache. Anyone who found any of these caches before the Orthocenter Rock got approved is entitled to respective clue about a vertex (or two).
What to do once you've got all three corners? I put together an Excel spreadshet at home to find the orthocenter coordinates on a sphere. Eventually, if this cache is found and if new seekers are at loss, I may try to convert it into a crude Javascript form online.
While I was struggling with it, I came across IQ Test #2 by fizzymagic There were links to "coords <-> bearings/distances" conversion tools, courtesy of Aussie government: coordinates to bearing and distance
and coordinates, azimuth, and distance to new coordinates. You may choose to work directly with the Aussie tools; they model Earth as a WGS84-like ellipsoid, but the results are pretty much the same as I get from a homemade spreadsheet. In any case, it is recommended that you use these tools to double-check your bearings.
There is a good trail to within 100 ft of the cache. There is also a poor trail or two, not recommended really. Perhaps this is the right place and time for a plug for Wasatch Mountain Club, of which I am a member. Two publications of the club, a "Wasatch Trails" map and a "Hiking the Wasatch" guidebook by Veranth, both describe the right trail in great detail.
Note added 10/3/03: It turns out that there already exists another Orthocenter cache in AZ, put together by no one else but Wily Javelina, the owner of two really cool local caches (The Quickest Quickie and Parley's Puzzle). Check it out too !
The cache is in a round plastic 3-quart container inside a camo plastic bag. Inside were the usual trinkets, keychains, coins, and actually useful things for a hiker, as well as Strongest Link the Cach-U-Nut #188 which is inextricably linked to Missing Link#1 the Travelbug.
Additional Hints
(Decrypt)
va n jrfg-snpvat perivffr sbhe srrg orybj gur gbc