Do you like to go to plays? The Oregon Shakesperian Festival in Ashland is awesome. Make sure you buy tickets now.
A week is just not enough time. You could spend a week on the Oregon Coast.
But if there is just one thing you can do in Oregon go to Crater Lake. They had over 600 inches of snow this year with a base now of 200 inches. So there should be snow around the lake most of the summer. Take the whole day and do the rim drive. The view changes at each stop you take. Try to get reservations to stay at Crater Lake Lodge. My husband and I did this and got up and watched the sun rise. I have never seen anything more beautiful as the sun coming over the rim of the lake. Believe me you will not be disappointed.