Do I hear you right, you live in Oroville, California...The city of Gold, smack dab in the midddle of the California Gold country and you haven't been able to find a spot to detect? Wish I had your problem.
I KNOW A FEW CLOSE TO CHICO AND YANKEE HILL I HEARD OF ONE CLOSE TO YOU AROUND THE LAKE MAYBE BERRY HILL CAMPGROUND OR CLOSE TO THAT WILL HAVE TO LOOK THROUGH MY STUFF BUT SUPPOSED TO BE SOME HIDDEN CACHE AROUND THERE