If you are going to the country fair. Take the bus from the downtown station in Eugene to get out there, its fairly quick, you don’t have to worry about parking at the fair (which is abysmal). Also, its free with a previously purchased ticket to the fair. Basically its the best way to go; and there’s buses going out and back into town all day so you can enjoy they fair as you please!
Just a little tip from a native Eugenian