CASCADIA — A 100-foot-tall Douglas fir tree that has been growing for the last 50 to 60 years on Swamp Mountain near Cascadia will soon begin its 1,800-mile journey from Linn County to the Hallmark. It was the tree where we hung our Hallmark Christmas ornaments that our mother bought us each year, along with the ornaments that our grandparents brought back from their trips abroad. When I think of….