The records of the Watercolor Society of Oregon from 1966 through 2010, which include photographs, exhibit catalogs, meeting minutes, and membership lists, are now available at the OSU Special Collections and Archives. Here is a guide to this collection to get you started.
If you have questions about accessing the WSO collection, feel free to contact Karl McCreary at karl.mccreary@oregonstate.edu or (541) 737-0539.
More recent records reside with the current WSO Historian.