Repeat, you'll need water on this hunt!
So those posted coordinates... they'll lead you to a micro cache at the parking area. It contains the coordinates you can hike or bike to.
While hiking, you will pass this [above]. When you get to the second stop, hunt for the 4x6 inch CVC mark. Use your water after you find the mark. There's a stash of extra water and a small pail on a rope in case you need more water. Replace what you use. [NOTE: If you end up fetching water, be extra careful not to fall in! Safety first.]
When the cache was stashed, it contained:
Geo-Note
Log Book
FTF Prize
Camera (take a picture and put it back).
Calculator
Prism Viewer
Lady Bug
Toad
Magnifing Glass
Panda Bear
Pumpkin
Extreme Skate Boarder
Betty Spaghetty
Travel Bug