I believe that these are the regs that apply:
2023 OREGON SPORT FISHING REGULATIONS49
Above Lookout Point Reservoir (including
above Hills Creek Reservoir)
• Open all year for trout.
• 5 hatchery trout per day, no minimum
length.
• Wild trout must be released, including
brook trout.
• See Hills Creek and Hills Creek Tributaries,
Salmon Creek and Tributaries, Salt Creek
and Tributaries.
Willamette River, North Fork
Middle Fork and Tributaries
• Open all year.
• 2 trout per day, 8 inch minimum length.
• Fly fishing only, barbless hooks required.