Stage 1
The published coordinates will take you to a benchmark (which you can also log on geocaching.com). There is a 4-digit year stamped on the top.
A = first digit of year
B = second digit of year
C = third digit of year
D = fourth digit of year
Substitute the above values into the following to get to Stage 2:
N 44 17.ABD
W 121 15.03C
Stage 2:
From here you can look across the river and see more county land. Look for a match holder wired into a Juniper tree to find the coordinates to the final cache.
Stage 3:
The final stage and the location of the cache is on top of a basalt "island”, surrounded by crevasses. You are looking for a small lock-and-lock container.