[4] It drains an area of Central Oregon Coast Range and the western Willamette Valley northwest of Corvallis.

[8] It rises in the remote mountains of southwestern Polk County, about 10 miles (16 km) west of Pedee.

[9] Named tributaries from source to mouth are Boulder, Beaver, Miller, Wolf, Rock Pit, Slick, Cougar, Slide, and Harris creeks.

Further downstream are Hull, Foster, Jones, Bonner, Vincent, Plunkett, and Price creeks.

Soap Creek enters the main stem along the Luckiamute's lower reaches.