Berries offer sweet temptation on a September trail run on Oregon’s Sauvie Island. Tansy blossoms, goldenrod and Queen Anne’s lace are the wildflowers of late summer in the Columbia River valley. https://www.nps.gov/articles/sauvieisland.htmA late summer swim in the Columbia River off the beach of Sauvie Island in Oregon. (Brian Mann | NPR)Transcript: JUANA SUMMERS, HOST: Late summer is blackberry season in the Pacific Northwest. NPR’s Brian Mann found a berry patch while out trail running on an island in Oregon’s Columbia River.