This cache is in Farragut State Park, so you will need to purchase a day pass at the Visitor Center or kiosk if you don't have an Idaho State Parks Annual Pass. When this cache was placed, a day pass cost $7 for Idaho residents and $14 for non-residents.
Letterboxing is a form of treasure hunting in which clues, rather than coordinates, are used. When a letterbox is found, the finder uses his/her stamp to stamp the book in the container, and uses the stamp in the container to stamp his/her own stamp book.
This is a Letterbox Hybrid Geocache, and as such it contains a stamp (bring your own inkpad) and a geocaching logbook, which you may sign or stamp. There is also a pencil and a trinket or two. Please leave the stamp, logbook, and pencil in the cache.
The container is not at the posted coordinates, but there you will see a trail sign, with three numbers on the sign post. Use these numbers to find the cache at N 47° 57.ABC W 116° 35.XYZ
A = Second digit in the top number
B = Sum of the digits in the middle number minus 1
C = First digit in the bottom number plus 2
X = Sum of the first digits of all three numbers minus 14
Y = Sum of the second digits in the top and bottom numbers minus 1
Z = Sum of all the digits on the post minus 23
Cache is located off the Lynx Trail. I found an animal trail of sorts that took me close to the hiding place. Look for a downed tree with a root ball. Stealth may be needed.
Congratulations to Martin 5 on an early morning first to find!