The Northern California Fly Fishing Board

It seems pretty simple to read the Fish and Game Code. It used to be quoted in the free regulations and maybe it still is. 2016. Fish & Game Code: Lands enclosed, posted, or under cultivation tells me that if it is fenced (enclosed), posted, or under cultivation, you need written permission. I got my CA hunting license when I was 9 years old (50 years ago) and I even knew the rules then. Landowners are especially suspicious of trespassers now because of all the tweakers who steal everything they own over and over again.