Here are some events going on this weekend:

Barns & Bluegrass at William L. Finley National Wildlife Refuge

 http://www.fws.gov/willamettevalley/finley/documents/barns%20and%20bluegrass12.pdf

Oregon State University Linn County Master Gardeners Plant Sale
http://www.facebook.com/pages/OSU-Master-Gardeners-Linn-County/152356564816191

Art in the Garden Mother's Day Celebration at the Thyme Garden
http://www.thymegarden.com/site/561124/page/255433

and the Corvallis Natural Areas Celebration has a number of activities going on including a Bat Night
http://sustainablecorvallis.org/action-teams/natural-areas/natural-areas-celebration-week/natural-areas-celebration-week-detailed-schedule/