Your search for Union County, Oregon revealed 5 records:

Date:	Source:	Location:	Description:
Fall 1988	BFRO	Palmer Junction	Elk hunters find two sets of bare-foot tracks in the snow near Palmer Junction
Fall 1967	The Bigfoot Casebook		Joe Jackson saw Bigfoot standing by road; it ran into brush
1950 's (late)	The Track Record #76	Ukiah	Wade Bettis, while elk hunting, found 12" track in moist earth near camp
summer 1970	oregonbigfoot.com	Starkey	Follow-up to vocalization encounter
summer 1970, 1999	oregonbigfoot.com	starkey and riggins	Man recalls hearing vocalizations in Union County, and in Idaho