You will need to bring your own lockpicking tools to get to the log. Raking, picking, bumping, whatever non-destructive method you want to use to open it is acceptable. Please don't damage the lock, or the container. I'd love to see a pic of an open lock with your log entry! I will occasionally check the log in the cache to make sure cachers actually got inside and then update the log here as necessary. Finding the cache is only the first step!
This lock is a doubly difficult brass one. It has 4 or 5 security pins and is in general a straight forward one to pick. The cache is in a "park" but it seems like that term is used liberally. Pretty view though! Good Luck!
Here is a list of all my lockpicking caches with more to come for sure! Lockpicking Cache List
If you are concerned about laws regarding lockpicking, the tools are legal to have in Washington and are treated like bolt cutters, don't be trespassing at night and you likely won't have any problems. RCW 9A If you have no experience lockpicking, I recommend doing some research and practice. YouTube would be a great start. You have my full permission to pick the lock on my geocaches. Stay safe, and stay legal.