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Shady Places ... Challenge Mystery Cache

This cache has been archived.

retiredprof: In light of geocaching's recent changes to the publishing rules, I am archiving all 150 of my challenge caches. I am a retired psychology professor, not a computer programmer. I am simply unable to comply with the new geochecker rules. I am sad that I have to do this. For those who have already begun any of my challenge caches, please note that you can still log archived caches. If you have any problems with this decision, please contact the geocaching authorities so that your suggestions may be considered.

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Hidden : 11/25/2012
Difficulty:
5 out of 5
Terrain:
2.5 out of 5

Size: Size:   small (small)

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Geocache Description:

The cache is hidden along the Feather River about 15 miles south of Yuba City. Park at the end of Sacramento Avenue and hike about .75 miles NE on the levee. Be sure to note the important logging requirements below.

Some of the most challenging caches I have found were in caves, grottoes, and tunnels. So, now it is your turn. You must find 25 caches with the word cave, cavern, grotto or tunnel in the title [plurals are OK]. You must find at least three of each word...and only one cache from a series, and no locationless caches. Be sure to include five types (icons) of caches on your qualifying list. And, remember to carry a flashlight in these dark, scary places...

474F---Cave Homes-----found 7-12-07 (Virtual
257D---Cave of Reeds------on 1-25-09
26C53--The Cache Cave----on 5-23-10
654B---...Indian Cave---found 6-26-08
25JA8...Cave Rock E/C------on 7-12-12 (EarthCache)
ZFW5---Oregon House Cave--11-22-06
JRWC---Kauai Cavern Cache--- 7-26-07
1WKJ3...Dinosaur Caverns------4-29-11
M96V--Grand Canyon Caverns--4-29-11
WVJ5--Graveyard Grotto...--on 7-27-07
2P41P...Green Grotto There----9-28-11 (Puzzle)
1BA0N--Swallow's Grotto-------1-10-09
HKVP---Tunnel Vision...---------4-21-05
NKC1---Tunnel Vision-----------1-14-06
Y3D0---Tree Tunnel-------------7-26-07
10YRJ--Tunnel of Palms--------2-24-07 (Traditional)
1XR92--Tunnel of Trees--------4-27-12
1609T--The Tunnel--found on 2-29-08
XMHG--Tunnel Beach Cache---8-30-06
HZ51---GD Tunnel Micro-------9-18-05
GRJT...Clark Tunnel Shortcut--12-3-06 (Multi)
1MAMT...Arch Rock-Tunnel...--3-12-09
WWYR--Tunnel of Trees-------6-30-06
NRGX---Hiller Tunnel---------10-09-05
19W86--Water Tunnel---------7-31-08

Additional Hints (Decrypt)

tebggb

Decryption Key

A|B|C|D|E|F|G|H|I|J|K|L|M
-------------------------
N|O|P|Q|R|S|T|U|V|W|X|Y|Z

(letter above equals below, and vice versa)