someone told me that leaders over 6' long were illegal. sounds ridiculous.
leader length is only restricted under Special Regulations for some locations as part of Anti-snagging Regulation (page 6 perm. regs.):
"Except when fishing with a buoyant lure (with no weights added to the line or lure), or trolling from a moving
vessel or floating device, terminal fishing gear is restricted to an artificial fly, lure, or bait with one singlepoint
hook. Hooks must measure 3/4-inch or less from point to shank, and must be attached to or below the
lure or bait. Weights may not be attached below or less than 18 inches above the lure or bait.
Regulations where anti-snagging regulation is in place."
NW&SW zone, I see above restriction or a different version of it in place for Big Creek, Salmon River, Three Rivers, Trask, Chetco, CoosBay, Rogue, N. Umpqua, & Winchuck. Willamette: Eagle Creek.