Take a boat ride out to Long Bay, about twenty miles from Whittier. A boat or kayak is definitely required, and you'll have to beach it to get this cache. Long Bay is a spawning site for salmon in the late summer, and if you time it right, you'll be able to snag some in the salt or freshwater. It's a really pretty location, and a good spot to see wildlife.
Congratulations to Syntonization for the FTF!!