[The series and its rules are explained here, where you will also find links to the songs for the other states.]
37:1. Portland, Oregon: 'Well, Portland Oregon and sloe gin fizz'. (1, 2, 3.)
37:2. Gypsy Lou: 'Then she went to Oregon'. (1.)
37:3. Don't Take Me Alive: 'I crossed my old man back in Oregon'. (1, 2.)
37:4. Oregon: 'Oregon is bad / Stop it if you can'. (1.)
37:5. Oregon Girl: 'Oregon girl with your lips and curls'. (1, 2.)
37:6. Speedway At Nazareth: 'Then it was on to Portland, Oregon for the G.I. Joe'. (1, 2, 3.)