Your search for Union County, Oregon revealed 7 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
Fall 1967	oregonbigfoot.com	La Grande	Late train engineer spots bipedal creature walking on hillside
2008	oregonbigfoot.com	Medical Springs	Vocalization heard near Medical Springs