Parking coordinates if needed: 35.242949, -111.566895
You may want to view the beauitul natrual art on your way back to the trail from Stage 2.
(natrual art coordinates 35.242730, -111.562557)
The KEY will help you on all challenges and stages.
Stage 1: The coordinates listed will get you to the mouth from there you must enter and search. Here you will obtain the key.
Stage 2: Do not remove entire cache from resting place only log book.
Stage 3: This cache is large enough for trade items and contains two suprises needing to be solved. Get the ball to X then slowly slide to O.
Stage 4: This may be the hardest one of all, good luck.
Replace all stages exactly :)