Your search for Benton County, Oregon revealed 8 records:

Date:	Source:	Location:	Description:
spring 1995	The Track Record		Mary's Peak - While visiting a waterfall, a coffee can is thrown at couple
winter 1993	The Track Record	near Alsea	6 miles w of Alsea - Joe Beelart sees a BF outlined in the headlights
Spring 1988	BFRO	near Alsea	West of Alsea, while riding dirt bikes down a trail, two high school seniors find their path blocked by large log
Summer 1975	GCBRO	Dawson	near Dawson - Loggers hear, smell and briefly glimpse a Bigfoot
1961	The Bigfoot Casebook	Alpine	Near Alpine, men saw tall Bigfoot at close range while deer hunting
summer 2004	oregonbigfoot.com	corvallis	Teens report tripping over something furry in the dark while searching for younger brother
spring 2002	oregonbigfoot.com	Philomath	Stomping, tree shaking, witnesses chased out of the woods
spring 1976	oregonbigfoot.com	Philomath	Woman relates seeing white sasquatch near family home as a child