Hi, MontanaSky! Welcome to NGA.
I think you're in Sunset Zone 6. Scroll half-way down this page:
http://www.sunset.com/garden/c...
Does this sound close?
ZONE 6: The Willamette and Columbia River Valleys
"Zone 6 is still a maritime climate,with a long growing season (from 155 days at Cottage Grove to 280 days in Portland neighborhoods) and 40 to 55 inches of annual precipitation most places. ... "
"Warm summers and chilly winters make the Willamette Valley one of the West’s best-known growing areas for berries, hazelnuts, roses, flowering fruit trees, and broadleafed evergreens."
"The Willamette Valley’s hills and small mountain ranges create many microclimates."
I like the Sunset Zones. They try to make zones small enough that, within that zone, you can mostly predict what will or won;t thrive, and not just based on "Are our winters cold enough to kill them?"
