Flatlands is closed last I heard.
Take 163 ( popcorn) to 163 ( FS Sign is gone) 163 comes out on popcorn rd, go left to plum orchard, to persimmon , to Charlie’s creek , go right on ruby mine td to a culdesack and creek, loop back to Charlie’s creek to 76.
Popcorn and Charlie’s creek will take 2-3 hours.
I could do this trail in my sleep .